./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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/unroll-cond-4.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 4755329f7559a8be1422f8772c1ed30abe185c2742a237de140cc196ec4e9010 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 04:15:13,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 04:15:13,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 04:15:13,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 04:15:13,058 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 04:15:13,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 04:15:13,063 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 04:15:13,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 04:15:13,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 04:15:13,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 04:15:13,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 04:15:13,069 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 04:15:13,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 04:15:13,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 04:15:13,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 04:15:13,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 04:15:13,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 04:15:13,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 04:15:13,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 04:15:13,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 04:15:13,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 04:15:13,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 04:15:13,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 04:15:13,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 04:15:13,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 04:15:13,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 04:15:13,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 04:15:13,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 04:15:13,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 04:15:13,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 04:15:13,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 04:15:13,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 04:15:13,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 04:15:13,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 04:15:13,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 04:15:13,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 04:15:13,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 04:15:13,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 04:15:13,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 04:15:13,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 04:15:13,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 04:15:13,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 04:15:13,117 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 04:15:13,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 04:15:13,119 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 04:15:13,119 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 04:15:13,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 04:15:13,120 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 04:15:13,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 04:15:13,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 04:15:13,122 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 04:15:13,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 04:15:13,123 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 04:15:13,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 04:15:13,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 04:15:13,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 04:15:13,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 04:15:13,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 04:15:13,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 04:15:13,124 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 04:15:13,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 04:15:13,125 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 04:15:13,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 04:15:13,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 04:15:13,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 04:15:13,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 04:15:13,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 04:15:13,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 04:15:13,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 04:15:13,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 04:15:13,126 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 04:15:13,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 04:15:13,127 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 04:15:13,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 04:15:13,127 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 04:15:13,128 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 04:15:13,128 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 04:15:13,128 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4755329f7559a8be1422f8772c1ed30abe185c2742a237de140cc196ec4e9010 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 04:15:13,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 04:15:13,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 04:15:13,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 04:15:13,485 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 04:15:13,486 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 04:15:13,487 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c [2023-08-31 04:15:14,695 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 04:15:14,921 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 04:15:14,922 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c [2023-08-31 04:15:14,929 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdd37448c/a85410bbcf814a43b20875e9d5401a75/FLAGec12ee036 [2023-08-31 04:15:14,942 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdd37448c/a85410bbcf814a43b20875e9d5401a75 [2023-08-31 04:15:14,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 04:15:14,945 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 04:15:14,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 04:15:14,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 04:15:14,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 04:15:14,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 04:15:14" (1/1) ... [2023-08-31 04:15:14,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46ef18ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:15:14, skipping insertion in model container [2023-08-31 04:15:14,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 04:15:14" (1/1) ... [2023-08-31 04:15:14,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 04:15:14,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 04:15:15,181 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/unroll-cond-4.wvr.c[2808,2821] [2023-08-31 04:15:15,196 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 04:15:15,207 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 04:15:15,242 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/unroll-cond-4.wvr.c[2808,2821] [2023-08-31 04:15:15,252 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 04:15:15,268 INFO L208 MainTranslator]: Completed translation [2023-08-31 04:15:15,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:15:15 WrapperNode [2023-08-31 04:15:15,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 04:15:15,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 04:15:15,289 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 04:15:15,289 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 04:15:15,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:15:15" (1/1) ... [2023-08-31 04:15:15,349 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:15:15" (1/1) ... [2023-08-31 04:15:15,384 INFO L138 Inliner]: procedures = 24, calls = 41, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 186 [2023-08-31 04:15:15,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 04:15:15,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 04:15:15,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 04:15:15,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 04:15:15,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:15:15" (1/1) ... [2023-08-31 04:15:15,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:15:15" (1/1) ... [2023-08-31 04:15:15,407 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:15:15" (1/1) ... [2023-08-31 04:15:15,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:15:15" (1/1) ... [2023-08-31 04:15:15,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:15:15" (1/1) ... [2023-08-31 04:15:15,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:15:15" (1/1) ... [2023-08-31 04:15:15,431 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:15:15" (1/1) ... [2023-08-31 04:15:15,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:15:15" (1/1) ... [2023-08-31 04:15:15,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 04:15:15,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 04:15:15,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 04:15:15,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 04:15:15,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:15:15" (1/1) ... [2023-08-31 04:15:15,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 04:15:15,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:15:15,470 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) [2023-08-31 04:15:15,495 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 [2023-08-31 04:15:15,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 04:15:15,509 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 04:15:15,509 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 04:15:15,509 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 04:15:15,509 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 04:15:15,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 04:15:15,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 04:15:15,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 04:15:15,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 04:15:15,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 04:15:15,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 04:15:15,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 04:15:15,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 04:15:15,511 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 04:15:15,634 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 04:15:15,636 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 04:15:15,918 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 04:15:15,927 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 04:15:15,928 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 04:15:15,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 04:15:15 BoogieIcfgContainer [2023-08-31 04:15:15,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 04:15:15,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 04:15:15,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 04:15:15,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 04:15:15,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 04:15:14" (1/3) ... [2023-08-31 04:15:15,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce0eba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 04:15:15, skipping insertion in model container [2023-08-31 04:15:15,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:15:15" (2/3) ... [2023-08-31 04:15:15,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce0eba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 04:15:15, skipping insertion in model container [2023-08-31 04:15:15,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 04:15:15" (3/3) ... [2023-08-31 04:15:15,944 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.c [2023-08-31 04:15:15,951 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 04:15:15,960 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 04:15:15,961 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 04:15:15,961 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 04:15:16,138 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 04:15:16,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 222 transitions, 460 flow [2023-08-31 04:15:16,308 INFO L130 PetriNetUnfolder]: 21/220 cut-off events. [2023-08-31 04:15:16,311 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:15:16,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 220 events. 21/220 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 376 event pairs, 0 based on Foata normal form. 0/198 useless extension candidates. Maximal degree in co-relation 133. Up to 2 conditions per place. [2023-08-31 04:15:16,318 INFO L82 GeneralOperation]: Start removeDead. Operand has 208 places, 222 transitions, 460 flow [2023-08-31 04:15:16,329 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 212 transitions, 436 flow [2023-08-31 04:15:16,334 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 04:15:16,347 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 212 transitions, 436 flow [2023-08-31 04:15:16,353 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 212 transitions, 436 flow [2023-08-31 04:15:16,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 212 transitions, 436 flow [2023-08-31 04:15:16,420 INFO L130 PetriNetUnfolder]: 21/212 cut-off events. [2023-08-31 04:15:16,420 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:15:16,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 212 events. 21/212 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 357 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 133. Up to 2 conditions per place. [2023-08-31 04:15:16,428 INFO L119 LiptonReduction]: Number of co-enabled transitions 5492 [2023-08-31 04:15:25,868 INFO L134 LiptonReduction]: Checked pairs total: 5306 [2023-08-31 04:15:25,869 INFO L136 LiptonReduction]: Total number of compositions: 254 [2023-08-31 04:15:25,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 04:15:25,886 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;@59d104bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 04:15:25,886 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 04:15:25,891 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-08-31 04:15:25,891 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:15:25,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:25,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:25,892 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:15:25,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:25,897 INFO L85 PathProgramCache]: Analyzing trace with hash 23434036, now seen corresponding path program 1 times [2023-08-31 04:15:25,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:25,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697678981] [2023-08-31 04:15:25,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:25,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:15:26,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:26,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697678981] [2023-08-31 04:15:26,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697678981] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:15:26,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:15:26,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 04:15:26,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246399004] [2023-08-31 04:15:26,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:15:26,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 04:15:26,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:15:26,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 04:15:26,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 04:15:26,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 476 [2023-08-31 04:15:26,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:26,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:15:26,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 476 [2023-08-31 04:15:26,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:15:26,571 INFO L130 PetriNetUnfolder]: 49/84 cut-off events. [2023-08-31 04:15:26,571 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 04:15:26,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 84 events. 49/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 201 event pairs, 19 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2023-08-31 04:15:26,573 INFO L137 encePairwiseOnDemand]: 473/476 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-31 04:15:26,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-08-31 04:15:26,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 04:15:26,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 04:15:26,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 611 transitions. [2023-08-31 04:15:26,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42787114845938373 [2023-08-31 04:15:26,588 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 611 transitions. [2023-08-31 04:15:26,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 611 transitions. [2023-08-31 04:15:26,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:15:26,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 611 transitions. [2023-08-31 04:15:26,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:26,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:26,604 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 476.0) internal successors, (1904), 4 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:26,605 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 611 transitions. [2023-08-31 04:15:26,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-08-31 04:15:26,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 04:15:26,609 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-08-31 04:15:26,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-08-31 04:15:26,614 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-31 04:15:26,615 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-08-31 04:15:26,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:26,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:26,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:26,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 04:15:26,616 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:15:26,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:26,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1325837020, now seen corresponding path program 1 times [2023-08-31 04:15:26,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:26,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103865324] [2023-08-31 04:15:26,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:26,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:15:26,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:26,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103865324] [2023-08-31 04:15:26,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103865324] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:15:26,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:15:26,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:15:26,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160894082] [2023-08-31 04:15:26,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:15:26,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:15:26,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:15:26,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:15:26,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:15:27,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 476 [2023-08-31 04:15:27,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 191.0) internal successors, (955), 5 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:27,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:15:27,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 476 [2023-08-31 04:15:27,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:15:27,315 INFO L130 PetriNetUnfolder]: 72/135 cut-off events. [2023-08-31 04:15:27,315 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:15:27,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 135 events. 72/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 369 event pairs, 24 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 274. Up to 77 conditions per place. [2023-08-31 04:15:27,316 INFO L137 encePairwiseOnDemand]: 470/476 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-08-31 04:15:27,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2023-08-31 04:15:27,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:15:27,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:15:27,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 980 transitions. [2023-08-31 04:15:27,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2023-08-31 04:15:27,322 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 980 transitions. [2023-08-31 04:15:27,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 980 transitions. [2023-08-31 04:15:27,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:15:27,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 980 transitions. [2023-08-31 04:15:27,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:27,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:27,333 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:27,334 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 980 transitions. [2023-08-31 04:15:27,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2023-08-31 04:15:27,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 175 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 04:15:27,335 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2023-08-31 04:15:27,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-08-31 04:15:27,337 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-08-31 04:15:27,337 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2023-08-31 04:15:27,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 191.0) internal successors, (955), 5 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:27,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:27,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:27,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 04:15:27,338 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:15:27,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:27,339 INFO L85 PathProgramCache]: Analyzing trace with hash -777538468, now seen corresponding path program 2 times [2023-08-31 04:15:27,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:27,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121470148] [2023-08-31 04:15:27,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:27,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:15:27,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:27,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121470148] [2023-08-31 04:15:27,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121470148] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:15:27,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:15:27,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:15:27,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449323156] [2023-08-31 04:15:27,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:15:27,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:15:27,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:15:27,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:15:27,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:15:27,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 476 [2023-08-31 04:15:27,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 187.0) internal successors, (935), 5 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:27,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:15:27,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 476 [2023-08-31 04:15:27,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:15:28,050 INFO L130 PetriNetUnfolder]: 109/198 cut-off events. [2023-08-31 04:15:28,051 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2023-08-31 04:15:28,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 198 events. 109/198 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 591 event pairs, 24 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 560. Up to 87 conditions per place. [2023-08-31 04:15:28,052 INFO L137 encePairwiseOnDemand]: 470/476 looper letters, 40 selfloop transitions, 12 changer transitions 0/52 dead transitions. [2023-08-31 04:15:28,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 52 transitions, 292 flow [2023-08-31 04:15:28,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 04:15:28,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 04:15:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1152 transitions. [2023-08-31 04:15:28,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40336134453781514 [2023-08-31 04:15:28,063 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1152 transitions. [2023-08-31 04:15:28,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1152 transitions. [2023-08-31 04:15:28,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:15:28,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1152 transitions. [2023-08-31 04:15:28,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:28,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 476.0) internal successors, (3332), 7 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:28,074 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 476.0) internal successors, (3332), 7 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:28,074 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 6 states and 1152 transitions. [2023-08-31 04:15:28,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 52 transitions, 292 flow [2023-08-31 04:15:28,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 52 transitions, 275 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-31 04:15:28,077 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 163 flow [2023-08-31 04:15:28,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-08-31 04:15:28,078 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-08-31 04:15:28,078 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 163 flow [2023-08-31 04:15:28,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 187.0) internal successors, (935), 5 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:28,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:28,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:28,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 04:15:28,079 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:15:28,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:28,080 INFO L85 PathProgramCache]: Analyzing trace with hash 579336880, now seen corresponding path program 3 times [2023-08-31 04:15:28,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:28,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809204775] [2023-08-31 04:15:28,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:28,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:15:28,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:28,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809204775] [2023-08-31 04:15:28,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809204775] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:15:28,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:15:28,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:15:28,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150388075] [2023-08-31 04:15:28,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:15:28,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:15:28,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:15:28,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:15:28,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:15:28,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 476 [2023-08-31 04:15:28,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:28,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:15:28,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 476 [2023-08-31 04:15:28,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:15:28,586 INFO L130 PetriNetUnfolder]: 119/214 cut-off events. [2023-08-31 04:15:28,586 INFO L131 PetriNetUnfolder]: For 334/334 co-relation queries the response was YES. [2023-08-31 04:15:28,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 214 events. 119/214 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 684 event pairs, 28 based on Foata normal form. 4/187 useless extension candidates. Maximal degree in co-relation 778. Up to 111 conditions per place. [2023-08-31 04:15:28,590 INFO L137 encePairwiseOnDemand]: 470/476 looper letters, 40 selfloop transitions, 14 changer transitions 0/54 dead transitions. [2023-08-31 04:15:28,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 376 flow [2023-08-31 04:15:28,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:15:28,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:15:28,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 966 transitions. [2023-08-31 04:15:28,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40588235294117647 [2023-08-31 04:15:28,595 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 966 transitions. [2023-08-31 04:15:28,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 966 transitions. [2023-08-31 04:15:28,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:15:28,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 966 transitions. [2023-08-31 04:15:28,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 193.2) internal successors, (966), 5 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:28,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:28,606 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:28,606 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 163 flow. Second operand 5 states and 966 transitions. [2023-08-31 04:15:28,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 376 flow [2023-08-31 04:15:28,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 362 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-08-31 04:15:28,614 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 255 flow [2023-08-31 04:15:28,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-31 04:15:28,617 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-08-31 04:15:28,617 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 255 flow [2023-08-31 04:15:28,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:28,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:28,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:28,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 04:15:28,618 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:15:28,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:28,619 INFO L85 PathProgramCache]: Analyzing trace with hash -149932496, now seen corresponding path program 4 times [2023-08-31 04:15:28,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:28,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364539085] [2023-08-31 04:15:28,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:28,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:15:28,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:28,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364539085] [2023-08-31 04:15:28,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364539085] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:15:28,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:15:28,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:15:28,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560357024] [2023-08-31 04:15:28,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:15:28,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:15:28,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:15:28,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:15:28,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:15:28,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 476 [2023-08-31 04:15:28,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 255 flow. Second operand has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:28,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:15:28,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 476 [2023-08-31 04:15:28,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:15:29,060 INFO L130 PetriNetUnfolder]: 115/210 cut-off events. [2023-08-31 04:15:29,061 INFO L131 PetriNetUnfolder]: For 586/586 co-relation queries the response was YES. [2023-08-31 04:15:29,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 210 events. 115/210 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 664 event pairs, 36 based on Foata normal form. 4/189 useless extension candidates. Maximal degree in co-relation 848. Up to 167 conditions per place. [2023-08-31 04:15:29,063 INFO L137 encePairwiseOnDemand]: 470/476 looper letters, 33 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2023-08-31 04:15:29,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 430 flow [2023-08-31 04:15:29,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:15:29,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:15:29,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 960 transitions. [2023-08-31 04:15:29,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40336134453781514 [2023-08-31 04:15:29,067 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 960 transitions. [2023-08-31 04:15:29,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 960 transitions. [2023-08-31 04:15:29,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:15:29,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 960 transitions. [2023-08-31 04:15:29,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:29,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:29,076 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:29,076 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 255 flow. Second operand 5 states and 960 transitions. [2023-08-31 04:15:29,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 430 flow [2023-08-31 04:15:29,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 414 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-31 04:15:29,080 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 347 flow [2023-08-31 04:15:29,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-08-31 04:15:29,083 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-08-31 04:15:29,084 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 347 flow [2023-08-31 04:15:29,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:29,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:29,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:29,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 04:15:29,085 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:15:29,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:29,086 INFO L85 PathProgramCache]: Analyzing trace with hash -861950526, now seen corresponding path program 5 times [2023-08-31 04:15:29,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:29,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98500403] [2023-08-31 04:15:29,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:29,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:15:29,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:29,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98500403] [2023-08-31 04:15:29,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98500403] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:15:29,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:15:29,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:15:29,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555708126] [2023-08-31 04:15:29,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:15:29,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:15:29,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:15:29,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:15:29,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:15:29,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 476 [2023-08-31 04:15:29,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 347 flow. Second operand has 5 states, 5 states have (on average 191.0) internal successors, (955), 5 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:29,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:15:29,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 476 [2023-08-31 04:15:29,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:15:29,636 INFO L130 PetriNetUnfolder]: 116/213 cut-off events. [2023-08-31 04:15:29,637 INFO L131 PetriNetUnfolder]: For 616/616 co-relation queries the response was YES. [2023-08-31 04:15:29,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 213 events. 116/213 cut-off events. For 616/616 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 688 event pairs, 24 based on Foata normal form. 2/190 useless extension candidates. Maximal degree in co-relation 920. Up to 113 conditions per place. [2023-08-31 04:15:29,639 INFO L137 encePairwiseOnDemand]: 470/476 looper letters, 41 selfloop transitions, 15 changer transitions 0/56 dead transitions. [2023-08-31 04:15:29,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 56 transitions, 503 flow [2023-08-31 04:15:29,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:15:29,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:15:29,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 979 transitions. [2023-08-31 04:15:29,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41134453781512603 [2023-08-31 04:15:29,643 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 979 transitions. [2023-08-31 04:15:29,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 979 transitions. [2023-08-31 04:15:29,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:15:29,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 979 transitions. [2023-08-31 04:15:29,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 195.8) internal successors, (979), 5 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:29,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:29,649 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:29,649 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 347 flow. Second operand 5 states and 979 transitions. [2023-08-31 04:15:29,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 56 transitions, 503 flow [2023-08-31 04:15:29,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 56 transitions, 460 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-31 04:15:29,653 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 344 flow [2023-08-31 04:15:29,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=344, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-08-31 04:15:29,654 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2023-08-31 04:15:29,654 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 344 flow [2023-08-31 04:15:29,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 191.0) internal successors, (955), 5 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:29,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:29,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:29,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 04:15:29,656 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:15:29,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:29,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1591219902, now seen corresponding path program 6 times [2023-08-31 04:15:29,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:29,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562773262] [2023-08-31 04:15:29,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:29,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:15:29,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:29,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562773262] [2023-08-31 04:15:29,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562773262] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:15:29,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:15:29,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:15:29,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480315231] [2023-08-31 04:15:29,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:15:29,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:15:29,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:15:29,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:15:29,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:15:29,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 476 [2023-08-31 04:15:29,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 344 flow. Second operand has 5 states, 5 states have (on average 191.0) internal successors, (955), 5 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:29,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:15:29,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 476 [2023-08-31 04:15:29,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:15:30,090 INFO L130 PetriNetUnfolder]: 115/206 cut-off events. [2023-08-31 04:15:30,090 INFO L131 PetriNetUnfolder]: For 707/707 co-relation queries the response was YES. [2023-08-31 04:15:30,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 913 conditions, 206 events. 115/206 cut-off events. For 707/707 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 636 event pairs, 35 based on Foata normal form. 2/183 useless extension candidates. Maximal degree in co-relation 884. Up to 160 conditions per place. [2023-08-31 04:15:30,092 INFO L137 encePairwiseOnDemand]: 470/476 looper letters, 34 selfloop transitions, 18 changer transitions 0/52 dead transitions. [2023-08-31 04:15:30,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 472 flow [2023-08-31 04:15:30,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:15:30,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:15:30,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 975 transitions. [2023-08-31 04:15:30,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096638655462185 [2023-08-31 04:15:30,100 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 975 transitions. [2023-08-31 04:15:30,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 975 transitions. [2023-08-31 04:15:30,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:15:30,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 975 transitions. [2023-08-31 04:15:30,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 195.0) internal successors, (975), 5 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:30,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:30,106 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 476.0) internal successors, (2856), 6 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:30,107 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 344 flow. Second operand 5 states and 975 transitions. [2023-08-31 04:15:30,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 472 flow [2023-08-31 04:15:30,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 438 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-31 04:15:30,110 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 350 flow [2023-08-31 04:15:30,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=350, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-08-31 04:15:30,111 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2023-08-31 04:15:30,111 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 350 flow [2023-08-31 04:15:30,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 191.0) internal successors, (955), 5 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:30,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:30,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:30,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 04:15:30,113 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:15:30,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:30,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1586382571, now seen corresponding path program 1 times [2023-08-31 04:15:30,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:30,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846618428] [2023-08-31 04:15:30,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:30,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:15:30,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:30,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846618428] [2023-08-31 04:15:30,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846618428] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:15:30,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373723451] [2023-08-31 04:15:30,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:30,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:30,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:15:30,479 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) [2023-08-31 04:15:30,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 04:15:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:30,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-31 04:15:30,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:15:30,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-31 04:15:30,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:15:30,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-31 04:15:32,044 INFO L321 Elim1Store]: treesize reduction 159, result has 14.1 percent of original size [2023-08-31 04:15:32,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 638 treesize of output 387 [2023-08-31 04:15:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:15:33,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:15:40,588 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:15:40,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 568 treesize of output 328 [2023-08-31 04:15:40,666 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:15:40,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 1744 treesize of output 1536 [2023-08-31 04:15:40,806 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:15:40,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 393 treesize of output 269 [2023-08-31 04:15:41,861 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:15:41,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 274 treesize of output 276 [2023-08-31 04:15:48,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:15:48,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 328 treesize of output 196 [2023-08-31 04:15:48,103 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:15:48,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 1090 treesize of output 982 [2023-08-31 04:15:48,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:15:48,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 245 treesize of output 185 [2023-08-31 04:15:48,343 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:15:48,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 178 treesize of output 190 [2023-08-31 04:15:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:15:48,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373723451] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:15:48,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:15:48,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-31 04:15:48,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286380776] [2023-08-31 04:15:48,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:15:48,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 04:15:48,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:15:48,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 04:15:48,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=237, Unknown=4, NotChecked=0, Total=306 [2023-08-31 04:15:51,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:15:54,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:15:56,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:15:59,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:16:01,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:16:03,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:16:05,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:16:07,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:16:09,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:16:12,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:16:14,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:16:17,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:16:19,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:16:19,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 476 [2023-08-31 04:16:19,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 350 flow. Second operand has 18 states, 18 states have (on average 87.66666666666667) internal successors, (1578), 18 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:19,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:16:19,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 476 [2023-08-31 04:16:19,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:16:27,879 WARN L222 SmtUtils]: Spent 8.37s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:16:34,681 WARN L222 SmtUtils]: Spent 6.33s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:16:37,179 INFO L130 PetriNetUnfolder]: 403/726 cut-off events. [2023-08-31 04:16:37,179 INFO L131 PetriNetUnfolder]: For 1970/1970 co-relation queries the response was YES. [2023-08-31 04:16:37,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2968 conditions, 726 events. 403/726 cut-off events. For 1970/1970 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3334 event pairs, 22 based on Foata normal form. 8/608 useless extension candidates. Maximal degree in co-relation 2363. Up to 221 conditions per place. [2023-08-31 04:16:37,184 INFO L137 encePairwiseOnDemand]: 465/476 looper letters, 83 selfloop transitions, 41 changer transitions 79/203 dead transitions. [2023-08-31 04:16:37,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 203 transitions, 1636 flow [2023-08-31 04:16:37,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 04:16:37,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 04:16:37,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2128 transitions. [2023-08-31 04:16:37,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.19437340153452684 [2023-08-31 04:16:37,195 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2128 transitions. [2023-08-31 04:16:37,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2128 transitions. [2023-08-31 04:16:37,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:16:37,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2128 transitions. [2023-08-31 04:16:37,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 92.52173913043478) internal successors, (2128), 23 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:37,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 476.0) internal successors, (11424), 24 states have internal predecessors, (11424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:37,217 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 476.0) internal successors, (11424), 24 states have internal predecessors, (11424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:37,217 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 350 flow. Second operand 23 states and 2128 transitions. [2023-08-31 04:16:37,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 203 transitions, 1636 flow [2023-08-31 04:16:37,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 203 transitions, 1558 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-31 04:16:37,229 INFO L231 Difference]: Finished difference. Result has 85 places, 66 transitions, 640 flow [2023-08-31 04:16:37,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=640, PETRI_PLACES=85, PETRI_TRANSITIONS=66} [2023-08-31 04:16:37,231 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 64 predicate places. [2023-08-31 04:16:37,232 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 66 transitions, 640 flow [2023-08-31 04:16:37,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 87.66666666666667) internal successors, (1578), 18 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:37,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:16:37,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:16:37,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 04:16:37,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:16:37,440 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:16:37,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:16:37,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1428326089, now seen corresponding path program 1 times [2023-08-31 04:16:37,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:16:37,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935374336] [2023-08-31 04:16:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:16:37,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:16:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:16:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:16:37,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:16:37,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935374336] [2023-08-31 04:16:37,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935374336] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:16:37,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055364848] [2023-08-31 04:16:37,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:16:37,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:16:37,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:16:37,696 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) [2023-08-31 04:16:37,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 04:16:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:16:37,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-31 04:16:37,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:16:38,531 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-08-31 04:16:38,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 327 treesize of output 306 [2023-08-31 04:16:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:16:38,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:16:43,780 INFO L321 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-08-31 04:16:43,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 91 [2023-08-31 04:16:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:16:44,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055364848] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:16:44,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:16:44,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-08-31 04:16:44,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331872059] [2023-08-31 04:16:44,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:16:44,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 04:16:44,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:16:44,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 04:16:44,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-08-31 04:16:51,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 04:16:55,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 476 [2023-08-31 04:16:55,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 66 transitions, 640 flow. Second operand has 20 states, 20 states have (on average 158.4) internal successors, (3168), 20 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:55,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:16:55,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 476 [2023-08-31 04:16:55,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:17:07,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 04:17:17,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 04:17:19,764 INFO L130 PetriNetUnfolder]: 673/1231 cut-off events. [2023-08-31 04:17:19,764 INFO L131 PetriNetUnfolder]: For 5640/5640 co-relation queries the response was YES. [2023-08-31 04:17:19,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5806 conditions, 1231 events. 673/1231 cut-off events. For 5640/5640 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6469 event pairs, 49 based on Foata normal form. 19/1247 useless extension candidates. Maximal degree in co-relation 5669. Up to 337 conditions per place. [2023-08-31 04:17:19,773 INFO L137 encePairwiseOnDemand]: 465/476 looper letters, 138 selfloop transitions, 108 changer transitions 77/323 dead transitions. [2023-08-31 04:17:19,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 323 transitions, 3008 flow [2023-08-31 04:17:19,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-31 04:17:19,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-31 04:17:19,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 6498 transitions. [2023-08-31 04:17:19,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.341281512605042 [2023-08-31 04:17:19,789 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 6498 transitions. [2023-08-31 04:17:19,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 6498 transitions. [2023-08-31 04:17:19,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:17:19,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 6498 transitions. [2023-08-31 04:17:19,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 162.45) internal successors, (6498), 40 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:19,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 476.0) internal successors, (19516), 41 states have internal predecessors, (19516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:19,831 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 476.0) internal successors, (19516), 41 states have internal predecessors, (19516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:19,831 INFO L175 Difference]: Start difference. First operand has 85 places, 66 transitions, 640 flow. Second operand 40 states and 6498 transitions. [2023-08-31 04:17:19,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 323 transitions, 3008 flow [2023-08-31 04:17:19,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 323 transitions, 2748 flow, removed 86 selfloop flow, removed 10 redundant places. [2023-08-31 04:17:19,857 INFO L231 Difference]: Finished difference. Result has 123 places, 145 transitions, 1710 flow [2023-08-31 04:17:19,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=476, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1710, PETRI_PLACES=123, PETRI_TRANSITIONS=145} [2023-08-31 04:17:19,858 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 102 predicate places. [2023-08-31 04:17:19,859 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 145 transitions, 1710 flow [2023-08-31 04:17:19,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 158.4) internal successors, (3168), 20 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:19,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:17:19,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:17:19,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 04:17:20,072 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,SelfDestructingSolverStorable8 [2023-08-31 04:17:20,072 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:17:20,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:17:20,073 INFO L85 PathProgramCache]: Analyzing trace with hash 662480889, now seen corresponding path program 2 times [2023-08-31 04:17:20,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:17:20,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742046559] [2023-08-31 04:17:20,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:17:20,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:17:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:17:20,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:17:20,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:17:20,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742046559] [2023-08-31 04:17:20,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742046559] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:17:20,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583685462] [2023-08-31 04:17:20,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:17:20,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:17:20,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:17:20,409 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) [2023-08-31 04:17:20,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 04:17:20,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:17:20,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:17:20,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-31 04:17:20,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:17:21,187 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-08-31 04:17:21,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 327 treesize of output 306 [2023-08-31 04:17:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:17:21,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:17:28,903 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:17:28,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 460 treesize of output 341 [2023-08-31 04:23:49,519 WARN L222 SmtUtils]: Spent 6.21m on a formula simplification. DAG size of input: 5060 DAG size of output: 4351 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15