./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-cond-3.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-3.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 95e3bac7f28ae020b684175cea363a5866905518c289fbd40a07a7a3764acade --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 04:14:48,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 04:14:48,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 04:14:48,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 04:14:48,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 04:14:48,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 04:14:48,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 04:14:48,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 04:14:48,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 04:14:48,251 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 04:14:48,252 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 04:14:48,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 04:14:48,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 04:14:48,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 04:14:48,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 04:14:48,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 04:14:48,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 04:14:48,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 04:14:48,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 04:14:48,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 04:14:48,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 04:14:48,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 04:14:48,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 04:14:48,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 04:14:48,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 04:14:48,281 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 04:14:48,281 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 04:14:48,282 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 04:14:48,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 04:14:48,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 04:14:48,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 04:14:48,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 04:14:48,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 04:14:48,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 04:14:48,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 04:14:48,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 04:14:48,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 04:14:48,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 04:14:48,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 04:14:48,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 04:14:48,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 04:14:48,293 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 04:14:48,326 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 04:14:48,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 04:14:48,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 04:14:48,327 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 04:14:48,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 04:14:48,328 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 04:14:48,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 04:14:48,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 04:14:48,329 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 04:14:48,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 04:14:48,330 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 04:14:48,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 04:14:48,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 04:14:48,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 04:14:48,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 04:14:48,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 04:14:48,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 04:14:48,331 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 04:14:48,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 04:14:48,332 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 04:14:48,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 04:14:48,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 04:14:48,332 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 04:14:48,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 04:14:48,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 04:14:48,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 04:14:48,333 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 04:14:48,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 04:14:48,333 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 04:14:48,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 04:14:48,334 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 04:14:48,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 04:14:48,334 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 04:14:48,334 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 04:14:48,335 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 04:14:48,335 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95e3bac7f28ae020b684175cea363a5866905518c289fbd40a07a7a3764acade Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 04:14:48,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 04:14:48,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 04:14:48,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 04:14:48,657 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 04:14:48,657 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 04:14:48,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c [2023-08-31 04:14:49,698 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 04:14:49,876 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 04:14:49,877 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c [2023-08-31 04:14:49,882 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/356b9b620/070da0e550f74e8693bdeec34006f6da/FLAG0d4b5c779 [2023-08-31 04:14:49,895 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/356b9b620/070da0e550f74e8693bdeec34006f6da [2023-08-31 04:14:49,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 04:14:49,898 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 04:14:49,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 04:14:49,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 04:14:49,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 04:14:49,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 04:14:49" (1/1) ... [2023-08-31 04:14:49,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3519f55b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:14:49, skipping insertion in model container [2023-08-31 04:14:49,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 04:14:49" (1/1) ... [2023-08-31 04:14:49,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 04:14:49,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 04:14:50,106 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-3.wvr.c[2641,2654] [2023-08-31 04:14:50,123 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 04:14:50,133 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 04:14:50,166 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-3.wvr.c[2641,2654] [2023-08-31 04:14:50,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 04:14:50,188 INFO L208 MainTranslator]: Completed translation [2023-08-31 04:14:50,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:14:50 WrapperNode [2023-08-31 04:14:50,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 04:14:50,193 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 04:14:50,193 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 04:14:50,193 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 04:14:50,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:14:50" (1/1) ... [2023-08-31 04:14:50,213 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:14:50" (1/1) ... [2023-08-31 04:14:50,261 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 165 [2023-08-31 04:14:50,261 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 04:14:50,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 04:14:50,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 04:14:50,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 04:14:50,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:14:50" (1/1) ... [2023-08-31 04:14:50,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:14:50" (1/1) ... [2023-08-31 04:14:50,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:14:50" (1/1) ... [2023-08-31 04:14:50,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:14:50" (1/1) ... [2023-08-31 04:14:50,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:14:50" (1/1) ... [2023-08-31 04:14:50,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:14:50" (1/1) ... [2023-08-31 04:14:50,309 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:14:50" (1/1) ... [2023-08-31 04:14:50,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:14:50" (1/1) ... [2023-08-31 04:14:50,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 04:14:50,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 04:14:50,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 04:14:50,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 04:14:50,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:14:50" (1/1) ... [2023-08-31 04:14:50,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 04:14:50,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:50,350 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 04:14:50,360 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 04:14:50,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 04:14:50,383 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 04:14:50,384 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 04:14:50,384 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 04:14:50,384 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 04:14:50,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 04:14:50,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 04:14:50,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 04:14:50,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 04:14:50,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 04:14:50,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 04:14:50,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 04:14:50,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 04:14:50,386 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 04:14:50,470 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 04:14:50,472 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 04:14:50,918 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 04:14:50,928 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 04:14:50,930 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 04:14:50,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 04:14:50 BoogieIcfgContainer [2023-08-31 04:14:50,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 04:14:50,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 04:14:50,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 04:14:50,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 04:14:50,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 04:14:49" (1/3) ... [2023-08-31 04:14:50,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57717a8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 04:14:50, skipping insertion in model container [2023-08-31 04:14:50,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:14:50" (2/3) ... [2023-08-31 04:14:50,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57717a8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 04:14:50, skipping insertion in model container [2023-08-31 04:14:50,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 04:14:50" (3/3) ... [2023-08-31 04:14:50,940 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2023-08-31 04:14:50,947 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 04:14:50,954 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 04:14:50,955 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 04:14:50,955 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 04:14:51,106 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 04:14:51,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 194 transitions, 404 flow [2023-08-31 04:14:51,247 INFO L130 PetriNetUnfolder]: 18/192 cut-off events. [2023-08-31 04:14:51,247 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:14:51,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 192 events. 18/192 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 300 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-08-31 04:14:51,254 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 194 transitions, 404 flow [2023-08-31 04:14:51,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 184 transitions, 380 flow [2023-08-31 04:14:51,266 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 04:14:51,278 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 184 transitions, 380 flow [2023-08-31 04:14:51,284 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 184 transitions, 380 flow [2023-08-31 04:14:51,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 184 transitions, 380 flow [2023-08-31 04:14:51,332 INFO L130 PetriNetUnfolder]: 18/184 cut-off events. [2023-08-31 04:14:51,333 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:14:51,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 184 events. 18/184 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 281 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-08-31 04:14:51,338 INFO L119 LiptonReduction]: Number of co-enabled transitions 4092 [2023-08-31 04:14:56,800 INFO L134 LiptonReduction]: Checked pairs total: 4038 [2023-08-31 04:14:56,800 INFO L136 LiptonReduction]: Total number of compositions: 221 [2023-08-31 04:14:56,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 04:14:56,817 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;@3ab4bed3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 04:14:56,818 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 04:14:56,823 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-08-31 04:14:56,823 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:14:56,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:56,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:56,824 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 04:14:56,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:56,828 INFO L85 PathProgramCache]: Analyzing trace with hash -562838425, now seen corresponding path program 1 times [2023-08-31 04:14:56,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:56,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438907110] [2023-08-31 04:14:56,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:56,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:57,253 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 04:14:57,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:57,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438907110] [2023-08-31 04:14:57,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438907110] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:14:57,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:14:57,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 04:14:57,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711608443] [2023-08-31 04:14:57,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:14:57,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 04:14:57,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:57,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 04:14:57,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 04:14:57,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 415 [2023-08-31 04:14:57,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 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 04:14:57,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:57,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 415 [2023-08-31 04:14:57,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:57,442 INFO L130 PetriNetUnfolder]: 49/84 cut-off events. [2023-08-31 04:14:57,442 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 04:14:57,445 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 188 event pairs, 19 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2023-08-31 04:14:57,447 INFO L137 encePairwiseOnDemand]: 412/415 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-31 04:14:57,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-08-31 04:14:57,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 04:14:57,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 04:14:57,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-08-31 04:14:57,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42811244979919677 [2023-08-31 04:14:57,467 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-08-31 04:14:57,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-08-31 04:14:57,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:57,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-08-31 04:14:57,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 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 04:14:57,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 415.0) internal successors, (1660), 4 states have internal predecessors, (1660), 0 states have call successors, (0), 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 04:14:57,484 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 415.0) internal successors, (1660), 4 states have internal predecessors, (1660), 0 states have call successors, (0), 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 04:14:57,485 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 533 transitions. [2023-08-31 04:14:57,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-08-31 04:14:57,489 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 04:14:57,490 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-08-31 04:14:57,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, 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 04:14:57,495 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-31 04:14:57,495 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-08-31 04:14:57,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 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 04:14:57,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:57,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:57,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 04:14:57,496 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 04:14:57,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:57,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1112897671, now seen corresponding path program 1 times [2023-08-31 04:14:57,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:57,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146697228] [2023-08-31 04:14:57,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:57,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:57,833 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 04:14:57,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:57,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146697228] [2023-08-31 04:14:57,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146697228] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:14:57,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:14:57,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:14:57,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131539622] [2023-08-31 04:14:57,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:14:57,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:14:57,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:57,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:14:57,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:14:57,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 415 [2023-08-31 04:14:57,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 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 04:14:57,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:57,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 415 [2023-08-31 04:14:57,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:58,014 INFO L130 PetriNetUnfolder]: 72/135 cut-off events. [2023-08-31 04:14:58,015 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:14:58,015 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 367 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 04:14:58,016 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-08-31 04:14:58,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2023-08-31 04:14:58,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:14:58,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:14:58,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 845 transitions. [2023-08-31 04:14:58,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4072289156626506 [2023-08-31 04:14:58,019 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 845 transitions. [2023-08-31 04:14:58,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 845 transitions. [2023-08-31 04:14:58,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:58,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 845 transitions. [2023-08-31 04:14:58,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 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 04:14:58,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 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 04:14:58,026 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 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 04:14:58,026 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 845 transitions. [2023-08-31 04:14:58,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2023-08-31 04:14:58,027 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 04:14:58,028 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2023-08-31 04:14:58,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, 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 04:14:58,029 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-08-31 04:14:58,029 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2023-08-31 04:14:58,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 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 04:14:58,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:58,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:58,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 04:14:58,030 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 04:14:58,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:58,031 INFO L85 PathProgramCache]: Analyzing trace with hash -387576613, now seen corresponding path program 2 times [2023-08-31 04:14:58,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:58,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412675387] [2023-08-31 04:14:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:58,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:58,205 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 04:14:58,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:58,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412675387] [2023-08-31 04:14:58,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412675387] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:14:58,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:14:58,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:14:58,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298848656] [2023-08-31 04:14:58,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:14:58,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:14:58,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:58,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:14:58,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:14:58,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 415 [2023-08-31 04:14:58,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 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 04:14:58,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:58,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 415 [2023-08-31 04:14:58,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:58,381 INFO L130 PetriNetUnfolder]: 111/208 cut-off events. [2023-08-31 04:14:58,381 INFO L131 PetriNetUnfolder]: For 115/115 co-relation queries the response was YES. [2023-08-31 04:14:58,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 208 events. 111/208 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 662 event pairs, 42 based on Foata normal form. 2/169 useless extension candidates. Maximal degree in co-relation 584. Up to 133 conditions per place. [2023-08-31 04:14:58,383 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 37 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2023-08-31 04:14:58,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 44 transitions, 252 flow [2023-08-31 04:14:58,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:14:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:14:58,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 856 transitions. [2023-08-31 04:14:58,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125301204819277 [2023-08-31 04:14:58,386 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 856 transitions. [2023-08-31 04:14:58,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 856 transitions. [2023-08-31 04:14:58,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:58,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 856 transitions. [2023-08-31 04:14:58,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.2) internal successors, (856), 5 states have internal predecessors, (856), 0 states have call successors, (0), 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 04:14:58,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 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 04:14:58,393 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 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 04:14:58,393 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 5 states and 856 transitions. [2023-08-31 04:14:58,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 44 transitions, 252 flow [2023-08-31 04:14:58,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 235 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-31 04:14:58,395 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 124 flow [2023-08-31 04:14:58,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-08-31 04:14:58,396 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2023-08-31 04:14:58,396 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 124 flow [2023-08-31 04:14:58,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 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 04:14:58,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:58,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:58,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 04:14:58,398 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 04:14:58,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:58,398 INFO L85 PathProgramCache]: Analyzing trace with hash 111746231, now seen corresponding path program 3 times [2023-08-31 04:14:58,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:58,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285771304] [2023-08-31 04:14:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:58,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:58,597 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 04:14:58,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:58,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285771304] [2023-08-31 04:14:58,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285771304] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:14:58,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:14:58,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:14:58,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520095448] [2023-08-31 04:14:58,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:14:58,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:14:58,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:58,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:14:58,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:14:58,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 415 [2023-08-31 04:14:58,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 165.0) internal successors, (825), 5 states have internal predecessors, (825), 0 states have call successors, (0), 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 04:14:58,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:58,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 415 [2023-08-31 04:14:58,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:58,829 INFO L130 PetriNetUnfolder]: 121/224 cut-off events. [2023-08-31 04:14:58,832 INFO L131 PetriNetUnfolder]: For 317/317 co-relation queries the response was YES. [2023-08-31 04:14:58,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 224 events. 121/224 cut-off events. For 317/317 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 744 event pairs, 44 based on Foata normal form. 4/201 useless extension candidates. Maximal degree in co-relation 764. Up to 121 conditions per place. [2023-08-31 04:14:58,834 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 37 selfloop transitions, 12 changer transitions 0/49 dead transitions. [2023-08-31 04:14:58,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 321 flow [2023-08-31 04:14:58,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:14:58,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:14:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 851 transitions. [2023-08-31 04:14:58,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41012048192771083 [2023-08-31 04:14:58,837 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 851 transitions. [2023-08-31 04:14:58,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 851 transitions. [2023-08-31 04:14:58,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:58,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 851 transitions. [2023-08-31 04:14:58,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 170.2) internal successors, (851), 5 states have internal predecessors, (851), 0 states have call successors, (0), 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 04:14:58,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 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 04:14:58,845 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 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 04:14:58,845 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 124 flow. Second operand 5 states and 851 transitions. [2023-08-31 04:14:58,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 321 flow [2023-08-31 04:14:58,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 297 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-31 04:14:58,851 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 203 flow [2023-08-31 04:14:58,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-08-31 04:14:58,852 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2023-08-31 04:14:58,852 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 203 flow [2023-08-31 04:14:58,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 165.0) internal successors, (825), 5 states have internal predecessors, (825), 0 states have call successors, (0), 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 04:14:58,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:58,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:58,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 04:14:58,854 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 04:14:58,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:58,854 INFO L85 PathProgramCache]: Analyzing trace with hash 664116733, now seen corresponding path program 4 times [2023-08-31 04:14:58,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:58,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944212239] [2023-08-31 04:14:58,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:58,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:59,079 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 04:14:59,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:59,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944212239] [2023-08-31 04:14:59,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944212239] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:14:59,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:14:59,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:14:59,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593435903] [2023-08-31 04:14:59,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:14:59,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:14:59,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:59,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:14:59,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:14:59,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 415 [2023-08-31 04:14:59,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 0 states have call successors, (0), 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 04:14:59,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:59,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 415 [2023-08-31 04:14:59,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:59,264 INFO L130 PetriNetUnfolder]: 117/220 cut-off events. [2023-08-31 04:14:59,264 INFO L131 PetriNetUnfolder]: For 530/530 co-relation queries the response was YES. [2023-08-31 04:14:59,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 220 events. 117/220 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 720 event pairs, 50 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 824. Up to 177 conditions per place. [2023-08-31 04:14:59,266 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 32 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2023-08-31 04:14:59,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 375 flow [2023-08-31 04:14:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:14:59,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:14:59,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 835 transitions. [2023-08-31 04:14:59,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40240963855421685 [2023-08-31 04:14:59,269 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 835 transitions. [2023-08-31 04:14:59,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 835 transitions. [2023-08-31 04:14:59,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:59,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 835 transitions. [2023-08-31 04:14:59,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 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 04:14:59,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 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 04:14:59,274 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 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 04:14:59,274 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 203 flow. Second operand 5 states and 835 transitions. [2023-08-31 04:14:59,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 375 flow [2023-08-31 04:14:59,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 362 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-31 04:14:59,278 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 296 flow [2023-08-31 04:14:59,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-08-31 04:14:59,279 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-08-31 04:14:59,279 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 296 flow [2023-08-31 04:14:59,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 0 states have call successors, (0), 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 04:14:59,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:59,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:59,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 04:14:59,280 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 04:14:59,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:59,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1682708675, now seen corresponding path program 5 times [2023-08-31 04:14:59,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:59,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758089735] [2023-08-31 04:14:59,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:59,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:59,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:59,393 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 04:14:59,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:59,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758089735] [2023-08-31 04:14:59,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758089735] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:14:59,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:14:59,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:14:59,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289817183] [2023-08-31 04:14:59,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:14:59,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:14:59,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:59,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:14:59,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:14:59,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 415 [2023-08-31 04:14:59,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 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 04:14:59,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:59,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 415 [2023-08-31 04:14:59,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:59,569 INFO L130 PetriNetUnfolder]: 118/223 cut-off events. [2023-08-31 04:14:59,569 INFO L131 PetriNetUnfolder]: For 733/733 co-relation queries the response was YES. [2023-08-31 04:14:59,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 223 events. 118/223 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 742 event pairs, 38 based on Foata normal form. 2/198 useless extension candidates. Maximal degree in co-relation 934. Up to 123 conditions per place. [2023-08-31 04:14:59,571 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 38 selfloop transitions, 14 changer transitions 0/52 dead transitions. [2023-08-31 04:14:59,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 442 flow [2023-08-31 04:14:59,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:14:59,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:14:59,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 859 transitions. [2023-08-31 04:14:59,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41397590361445785 [2023-08-31 04:14:59,574 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 859 transitions. [2023-08-31 04:14:59,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 859 transitions. [2023-08-31 04:14:59,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:59,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 859 transitions. [2023-08-31 04:14:59,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.8) internal successors, (859), 5 states have internal predecessors, (859), 0 states have call successors, (0), 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 04:14:59,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 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 04:14:59,580 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 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 04:14:59,580 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 296 flow. Second operand 5 states and 859 transitions. [2023-08-31 04:14:59,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 442 flow [2023-08-31 04:14:59,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 388 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-08-31 04:14:59,583 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 282 flow [2023-08-31 04:14:59,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2023-08-31 04:14:59,584 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-08-31 04:14:59,584 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 282 flow [2023-08-31 04:14:59,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 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 04:14:59,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:59,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:59,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 04:14:59,585 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 04:14:59,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:59,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1368229791, now seen corresponding path program 6 times [2023-08-31 04:14:59,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:59,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162197651] [2023-08-31 04:14:59,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:59,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:59,734 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 04:14:59,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:59,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162197651] [2023-08-31 04:14:59,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162197651] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:14:59,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:14:59,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:14:59,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914080306] [2023-08-31 04:14:59,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:14:59,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:14:59,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:59,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:14:59,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:14:59,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 415 [2023-08-31 04:14:59,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 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 04:14:59,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:59,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 415 [2023-08-31 04:14:59,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:59,984 INFO L130 PetriNetUnfolder]: 117/216 cut-off events. [2023-08-31 04:14:59,984 INFO L131 PetriNetUnfolder]: For 679/679 co-relation queries the response was YES. [2023-08-31 04:14:59,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 897 conditions, 216 events. 117/216 cut-off events. For 679/679 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 703 event pairs, 49 based on Foata normal form. 2/191 useless extension candidates. Maximal degree in co-relation 870. Up to 170 conditions per place. [2023-08-31 04:14:59,986 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 34 selfloop transitions, 15 changer transitions 0/49 dead transitions. [2023-08-31 04:14:59,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 414 flow [2023-08-31 04:14:59,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:14:59,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:14:59,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 855 transitions. [2023-08-31 04:14:59,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41204819277108434 [2023-08-31 04:14:59,990 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 855 transitions. [2023-08-31 04:14:59,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 855 transitions. [2023-08-31 04:14:59,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:59,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 855 transitions. [2023-08-31 04:14:59,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 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 04:14:59,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 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 04:14:59,996 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 415.0) internal successors, (2490), 6 states have internal predecessors, (2490), 0 states have call successors, (0), 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 04:14:59,996 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 282 flow. Second operand 5 states and 855 transitions. [2023-08-31 04:14:59,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 414 flow [2023-08-31 04:14:59,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 380 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-31 04:14:59,999 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 294 flow [2023-08-31 04:15:00,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2023-08-31 04:15:00,000 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2023-08-31 04:15:00,000 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 294 flow [2023-08-31 04:15:00,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 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 04:15:00,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:00,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:00,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 04:15:00,002 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 04:15:00,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:00,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1003719491, now seen corresponding path program 1 times [2023-08-31 04:15:00,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:00,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189946304] [2023-08-31 04:15:00,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:00,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:00,206 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 04:15:00,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:00,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189946304] [2023-08-31 04:15:00,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189946304] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:15:00,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698015621] [2023-08-31 04:15:00,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:00,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:00,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:15:00,213 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 04:15:00,221 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 04:15:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:00,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-31 04:15:00,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:15:00,971 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 04:15:00,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 168 [2023-08-31 04:15:01,130 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 04:15:01,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:15:02,331 INFO L321 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2023-08-31 04:15:02,332 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 45 [2023-08-31 04:15:02,471 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 04:15:02,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698015621] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:15:02,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:15:02,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 18 [2023-08-31 04:15:02,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154160558] [2023-08-31 04:15:02,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:15:02,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 04:15:02,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:15:02,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 04:15:02,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-08-31 04:15:04,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 415 [2023-08-31 04:15:04,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 294 flow. Second operand has 18 states, 18 states have (on average 139.16666666666666) internal successors, (2505), 18 states have internal predecessors, (2505), 0 states have call successors, (0), 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 04:15:04,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:15:04,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 415 [2023-08-31 04:15:04,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:15:07,814 INFO L130 PetriNetUnfolder]: 445/853 cut-off events. [2023-08-31 04:15:07,814 INFO L131 PetriNetUnfolder]: For 2069/2069 co-relation queries the response was YES. [2023-08-31 04:15:07,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3298 conditions, 853 events. 445/853 cut-off events. For 2069/2069 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4322 event pairs, 17 based on Foata normal form. 9/723 useless extension candidates. Maximal degree in co-relation 2803. Up to 261 conditions per place. [2023-08-31 04:15:07,821 INFO L137 encePairwiseOnDemand]: 403/415 looper letters, 140 selfloop transitions, 91 changer transitions 28/259 dead transitions. [2023-08-31 04:15:07,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 259 transitions, 1884 flow [2023-08-31 04:15:07,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-31 04:15:07,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-31 04:15:07,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4750 transitions. [2023-08-31 04:15:07,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3468419131069733 [2023-08-31 04:15:07,833 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4750 transitions. [2023-08-31 04:15:07,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4750 transitions. [2023-08-31 04:15:07,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:15:07,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4750 transitions. [2023-08-31 04:15:07,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 143.93939393939394) internal successors, (4750), 33 states have internal predecessors, (4750), 0 states have call successors, (0), 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 04:15:07,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 415.0) internal successors, (14110), 34 states have internal predecessors, (14110), 0 states have call successors, (0), 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 04:15:07,865 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 415.0) internal successors, (14110), 34 states have internal predecessors, (14110), 0 states have call successors, (0), 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 04:15:07,866 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 294 flow. Second operand 33 states and 4750 transitions. [2023-08-31 04:15:07,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 259 transitions, 1884 flow [2023-08-31 04:15:07,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 259 transitions, 1776 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-31 04:15:07,875 INFO L231 Difference]: Finished difference. Result has 95 places, 125 transitions, 1210 flow [2023-08-31 04:15:07,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1210, PETRI_PLACES=95, PETRI_TRANSITIONS=125} [2023-08-31 04:15:07,875 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 74 predicate places. [2023-08-31 04:15:07,876 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 125 transitions, 1210 flow [2023-08-31 04:15:07,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 139.16666666666666) internal successors, (2505), 18 states have internal predecessors, (2505), 0 states have call successors, (0), 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 04:15:07,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:07,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:07,888 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 04:15:08,083 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 04:15:08,084 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 04:15:08,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:08,084 INFO L85 PathProgramCache]: Analyzing trace with hash -763425186, now seen corresponding path program 1 times [2023-08-31 04:15:08,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:08,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369999896] [2023-08-31 04:15:08,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:08,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:08,367 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 04:15:08,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:08,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369999896] [2023-08-31 04:15:08,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369999896] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:15:08,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076684631] [2023-08-31 04:15:08,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:08,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:08,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:15:08,371 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 04:15:08,395 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 04:15:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:08,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-31 04:15:08,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:15:08,530 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 04:15:08,566 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 04:15:08,598 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 04:15:09,177 INFO L321 Elim1Store]: treesize reduction 74, result has 14.9 percent of original size [2023-08-31 04:15:09,178 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 301 treesize of output 212 [2023-08-31 04:15:09,281 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 04:15:09,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:15:15,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:15:15,062 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 250 treesize of output 154 [2023-08-31 04:15:15,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:15:15,087 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 934 treesize of output 838 [2023-08-31 04:15:15,135 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:15:15,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 209 treesize of output 149 [2023-08-31 04:15:15,502 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:15:15,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 154 [2023-08-31 04:15:16,538 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-31 04:15:16,539 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 438 treesize of output 1 [2023-08-31 04:15:16,595 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 04:15:16,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076684631] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:15:16,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:15:16,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 23 [2023-08-31 04:15:16,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883440814] [2023-08-31 04:15:16,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:15:16,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 04:15:16,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:15:16,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 04:15:16,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=372, Unknown=13, NotChecked=0, Total=506 [2023-08-31 04:15:18,686 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 04:15:20,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:15:23,331 WARN L539 Checker$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 04:15:25,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:15:28,647 WARN L539 Checker$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 04:15:31,205 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 04:15:31,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 415 [2023-08-31 04:15:31,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 125 transitions, 1210 flow. Second operand has 23 states, 23 states have (on average 81.08695652173913) internal successors, (1865), 23 states have internal predecessors, (1865), 0 states have call successors, (0), 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 04:15:31,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:15:31,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 415 [2023-08-31 04:15:31,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:15:31,799 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* c_~x2~0 4) c_~f~0.offset))) (and (forall ((v_ArrVal_167 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_167) c_~f~0.base))) (let ((.cse1 (select .cse2 .cse3))) (let ((.cse0 (select .cse2 (+ c_~f~0.offset (* .cse1 4))))) (or (< .cse0 0) (< .cse1 0) (= c_~x1~0 (select .cse2 (+ (* .cse0 4) c_~f~0.offset))) (<= c_~size~0 .cse0) (<= c_~size~0 .cse1)))))) (let ((.cse7 (select |c_#memory_int| c_~f~0.base))) (let ((.cse4 (select .cse7 .cse3))) (let ((.cse5 (select .cse7 (+ (* .cse4 4) c_~f~0.offset)))) (or (< .cse4 0) (< .cse5 0) (let ((.cse6 (select .cse7 (+ c_~f~0.offset (* 4 .cse5))))) (and (or (< .cse6 0) (= c_~x1~0 (select .cse7 (+ c_~f~0.offset (* .cse6 4)))) (<= c_~size~0 .cse6)) (= .cse6 c_~x1~0))) (<= c_~size~0 .cse5) (<= c_~size~0 .cse4))))) (forall ((v_ArrVal_167 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_167) c_~f~0.base))) (let ((.cse9 (select .cse11 .cse3))) (let ((.cse8 (select .cse11 (+ c_~f~0.offset (* .cse9 4))))) (let ((.cse10 (select .cse11 (+ (* .cse8 4) c_~f~0.offset)))) (or (< .cse8 0) (< .cse9 0) (< .cse10 0) (<= c_~size~0 .cse8) (= c_~x1~0 (select .cse11 (+ (* .cse10 4) c_~f~0.offset))) (<= c_~size~0 .cse10) (<= c_~size~0 .cse9))))))))) is different from false [2023-08-31 04:15:41,780 INFO L130 PetriNetUnfolder]: 702/1317 cut-off events. [2023-08-31 04:15:41,781 INFO L131 PetriNetUnfolder]: For 7881/7881 co-relation queries the response was YES. [2023-08-31 04:15:41,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6782 conditions, 1317 events. 702/1317 cut-off events. For 7881/7881 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 7362 event pairs, 61 based on Foata normal form. 13/1328 useless extension candidates. Maximal degree in co-relation 6520. Up to 451 conditions per place. [2023-08-31 04:15:41,792 INFO L137 encePairwiseOnDemand]: 402/415 looper letters, 124 selfloop transitions, 125 changer transitions 42/291 dead transitions. [2023-08-31 04:15:41,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 291 transitions, 2957 flow [2023-08-31 04:15:41,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-31 04:15:41,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-31 04:15:41,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2551 transitions. [2023-08-31 04:15:41,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2048995983935743 [2023-08-31 04:15:41,802 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2551 transitions. [2023-08-31 04:15:41,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2551 transitions. [2023-08-31 04:15:41,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:15:41,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2551 transitions. [2023-08-31 04:15:41,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 85.03333333333333) internal successors, (2551), 30 states have internal predecessors, (2551), 0 states have call successors, (0), 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 04:15:41,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 415.0) internal successors, (12865), 31 states have internal predecessors, (12865), 0 states have call successors, (0), 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 04:15:41,839 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 415.0) internal successors, (12865), 31 states have internal predecessors, (12865), 0 states have call successors, (0), 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 04:15:41,839 INFO L175 Difference]: Start difference. First operand has 95 places, 125 transitions, 1210 flow. Second operand 30 states and 2551 transitions. [2023-08-31 04:15:41,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 291 transitions, 2957 flow [2023-08-31 04:15:41,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 291 transitions, 2609 flow, removed 151 selfloop flow, removed 7 redundant places. [2023-08-31 04:15:41,879 INFO L231 Difference]: Finished difference. Result has 122 places, 174 transitions, 1829 flow [2023-08-31 04:15:41,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1829, PETRI_PLACES=122, PETRI_TRANSITIONS=174} [2023-08-31 04:15:41,880 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 101 predicate places. [2023-08-31 04:15:41,880 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 174 transitions, 1829 flow [2023-08-31 04:15:41,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 81.08695652173913) internal successors, (1865), 23 states have internal predecessors, (1865), 0 states have call successors, (0), 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 04:15:41,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:41,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:41,889 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 04:15:42,086 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 04:15:42,087 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 04:15:42,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:42,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1184608103, now seen corresponding path program 2 times [2023-08-31 04:15:42,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:42,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852147618] [2023-08-31 04:15:42,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:42,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:42,290 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 04:15:42,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:42,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852147618] [2023-08-31 04:15:42,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852147618] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:15:42,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722710022] [2023-08-31 04:15:42,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:15:42,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:42,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:15:42,293 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 04:15:42,296 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 04:15:42,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:15:42,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:15:42,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 04:15:42,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:15:42,486 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 04:15:42,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:15:42,574 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 04:15:42,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722710022] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:15:42,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:15:42,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 04:15:42,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509683196] [2023-08-31 04:15:42,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:15:42,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 04:15:42,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:15:42,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 04:15:42,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-31 04:15:42,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 415 [2023-08-31 04:15:42,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 174 transitions, 1829 flow. Second operand has 12 states, 12 states have (on average 160.33333333333334) internal successors, (1924), 12 states have internal predecessors, (1924), 0 states have call successors, (0), 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 04:15:42,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:15:42,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 415 [2023-08-31 04:15:42,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:15:43,367 INFO L130 PetriNetUnfolder]: 722/1367 cut-off events. [2023-08-31 04:15:43,367 INFO L131 PetriNetUnfolder]: For 10183/10183 co-relation queries the response was YES. [2023-08-31 04:15:43,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7887 conditions, 1367 events. 722/1367 cut-off events. For 10183/10183 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7787 event pairs, 228 based on Foata normal form. 30/1396 useless extension candidates. Maximal degree in co-relation 7299. Up to 1123 conditions per place. [2023-08-31 04:15:43,379 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 169 selfloop transitions, 70 changer transitions 5/244 dead transitions. [2023-08-31 04:15:43,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 244 transitions, 2955 flow [2023-08-31 04:15:43,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 04:15:43,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 04:15:43,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1812 transitions. [2023-08-31 04:15:43,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39693318729463306 [2023-08-31 04:15:43,386 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1812 transitions. [2023-08-31 04:15:43,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1812 transitions. [2023-08-31 04:15:43,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:15:43,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1812 transitions. [2023-08-31 04:15:43,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 164.72727272727272) internal successors, (1812), 11 states have internal predecessors, (1812), 0 states have call successors, (0), 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 04:15:43,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 415.0) internal successors, (4980), 12 states have internal predecessors, (4980), 0 states have call successors, (0), 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 04:15:43,397 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 415.0) internal successors, (4980), 12 states have internal predecessors, (4980), 0 states have call successors, (0), 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 04:15:43,397 INFO L175 Difference]: Start difference. First operand has 122 places, 174 transitions, 1829 flow. Second operand 11 states and 1812 transitions. [2023-08-31 04:15:43,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 244 transitions, 2955 flow [2023-08-31 04:15:43,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 244 transitions, 2626 flow, removed 113 selfloop flow, removed 12 redundant places. [2023-08-31 04:15:43,447 INFO L231 Difference]: Finished difference. Result has 121 places, 208 transitions, 2238 flow [2023-08-31 04:15:43,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=1606, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2238, PETRI_PLACES=121, PETRI_TRANSITIONS=208} [2023-08-31 04:15:43,449 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 100 predicate places. [2023-08-31 04:15:43,449 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 208 transitions, 2238 flow [2023-08-31 04:15:43,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 160.33333333333334) internal successors, (1924), 12 states have internal predecessors, (1924), 0 states have call successors, (0), 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 04:15:43,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:43,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:43,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 04:15:43,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:43,657 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:15:43,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:43,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1315904287, now seen corresponding path program 3 times [2023-08-31 04:15:43,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:43,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747141901] [2023-08-31 04:15:43,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:43,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:43,857 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 04:15:43,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:43,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747141901] [2023-08-31 04:15:43,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747141901] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:15:43,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336053596] [2023-08-31 04:15:43,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:15:43,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:43,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:15:43,861 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:15:43,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 04:15:43,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 04:15:43,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:15:43,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-31 04:15:43,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:15:44,264 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 04:15:44,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 168 [2023-08-31 04:15:44,372 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 04:15:44,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:15:45,075 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:15:45,075 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 148 [2023-08-31 04:16:06,834 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 04:16:06,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336053596] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:16:06,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:16:06,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-08-31 04:16:06,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822926726] [2023-08-31 04:16:06,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:16:06,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 04:16:06,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:16:06,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 04:16:06,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-08-31 04:16:08,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 415 [2023-08-31 04:16:08,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 208 transitions, 2238 flow. Second operand has 20 states, 20 states have (on average 138.4) internal successors, (2768), 20 states have internal predecessors, (2768), 0 states have call successors, (0), 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 04:16:08,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:16:08,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 415 [2023-08-31 04:16:08,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:16:11,130 INFO L130 PetriNetUnfolder]: 839/1568 cut-off events. [2023-08-31 04:16:11,130 INFO L131 PetriNetUnfolder]: For 11977/11977 co-relation queries the response was YES. [2023-08-31 04:16:11,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9101 conditions, 1568 events. 839/1568 cut-off events. For 11977/11977 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9033 event pairs, 149 based on Foata normal form. 12/1579 useless extension candidates. Maximal degree in co-relation 8954. Up to 1122 conditions per place. [2023-08-31 04:16:11,141 INFO L137 encePairwiseOnDemand]: 405/415 looper letters, 199 selfloop transitions, 88 changer transitions 11/298 dead transitions. [2023-08-31 04:16:11,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 298 transitions, 3550 flow [2023-08-31 04:16:11,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 04:16:11,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 04:16:11,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3390 transitions. [2023-08-31 04:16:11,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34036144578313254 [2023-08-31 04:16:11,149 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3390 transitions. [2023-08-31 04:16:11,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3390 transitions. [2023-08-31 04:16:11,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:16:11,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3390 transitions. [2023-08-31 04:16:11,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 141.25) internal successors, (3390), 24 states have internal predecessors, (3390), 0 states have call successors, (0), 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 04:16:11,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 415.0) internal successors, (10375), 25 states have internal predecessors, (10375), 0 states have call successors, (0), 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 04:16:11,166 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 415.0) internal successors, (10375), 25 states have internal predecessors, (10375), 0 states have call successors, (0), 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 04:16:11,166 INFO L175 Difference]: Start difference. First operand has 121 places, 208 transitions, 2238 flow. Second operand 24 states and 3390 transitions. [2023-08-31 04:16:11,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 298 transitions, 3550 flow [2023-08-31 04:16:11,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 298 transitions, 3351 flow, removed 93 selfloop flow, removed 2 redundant places. [2023-08-31 04:16:11,227 INFO L231 Difference]: Finished difference. Result has 146 places, 233 transitions, 2639 flow [2023-08-31 04:16:11,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=2097, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2639, PETRI_PLACES=146, PETRI_TRANSITIONS=233} [2023-08-31 04:16:11,228 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 125 predicate places. [2023-08-31 04:16:11,228 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 233 transitions, 2639 flow [2023-08-31 04:16:11,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 138.4) internal successors, (2768), 20 states have internal predecessors, (2768), 0 states have call successors, (0), 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 04:16:11,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:16:11,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:16:11,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 04:16:11,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:16:11,435 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:16:11,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:16:11,436 INFO L85 PathProgramCache]: Analyzing trace with hash 84161971, now seen corresponding path program 4 times [2023-08-31 04:16:11,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:16:11,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791270958] [2023-08-31 04:16:11,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:16:11,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:16:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:16:11,619 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 04:16:11,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:16:11,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791270958] [2023-08-31 04:16:11,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791270958] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:16:11,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110157336] [2023-08-31 04:16:11,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:16:11,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:16:11,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:16:11,625 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:16:11,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 04:16:11,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:16:11,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:16:11,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-31 04:16:11,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:16:11,763 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 04:16:11,798 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 04:16:11,829 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 04:16:12,095 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 04:16:12,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 168 [2023-08-31 04:16:12,211 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 04:16:12,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:16:49,214 WARN L222 SmtUtils]: Spent 8.70s on a formula simplification. DAG size of input: 777 DAG size of output: 719 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-31 04:17:25,677 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:17:25,677 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 140 treesize of output 92 [2023-08-31 04:17:25,695 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:17:25,695 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 540 treesize of output 500 [2023-08-31 04:17:25,728 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:17:25,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 104 [2023-08-31 04:17:25,959 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:17:25,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 101 [2023-08-31 04:17:26,098 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 04:17:26,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110157336] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:17:26,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:17:26,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-31 04:17:26,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129964275] [2023-08-31 04:17:26,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:17:26,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 04:17:26,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:17:26,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 04:17:26,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=362, Unknown=1, NotChecked=0, Total=462 [2023-08-31 04:17:28,205 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 04:17:30,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:17:33,730 WARN L539 Checker$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 04:17:35,911 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 04:17:36,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 415 [2023-08-31 04:17:36,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 233 transitions, 2639 flow. Second operand has 22 states, 22 states have (on average 101.18181818181819) internal successors, (2226), 22 states have internal predecessors, (2226), 0 states have call successors, (0), 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 04:17:36,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:17:36,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 415 [2023-08-31 04:17:36,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:17:50,673 WARN L222 SmtUtils]: Spent 10.11s on a formula simplification. DAG size of input: 70 DAG size of output: 42 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:17:53,739 INFO L130 PetriNetUnfolder]: 1128/2141 cut-off events. [2023-08-31 04:17:53,740 INFO L131 PetriNetUnfolder]: For 17581/17581 co-relation queries the response was YES. [2023-08-31 04:17:53,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12714 conditions, 2141 events. 1128/2141 cut-off events. For 17581/17581 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 13645 event pairs, 91 based on Foata normal form. 21/2161 useless extension candidates. Maximal degree in co-relation 12590. Up to 955 conditions per place. [2023-08-31 04:17:53,760 INFO L137 encePairwiseOnDemand]: 404/415 looper letters, 186 selfloop transitions, 192 changer transitions 28/406 dead transitions. [2023-08-31 04:17:53,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 406 transitions, 4986 flow [2023-08-31 04:17:53,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-31 04:17:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-31 04:17:53,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3054 transitions. [2023-08-31 04:17:53,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2537598670544246 [2023-08-31 04:17:53,766 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3054 transitions. [2023-08-31 04:17:53,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3054 transitions. [2023-08-31 04:17:53,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:17:53,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3054 transitions. [2023-08-31 04:17:53,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 105.3103448275862) internal successors, (3054), 29 states have internal predecessors, (3054), 0 states have call successors, (0), 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 04:17:53,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 415.0) internal successors, (12450), 30 states have internal predecessors, (12450), 0 states have call successors, (0), 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 04:17:53,787 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 415.0) internal successors, (12450), 30 states have internal predecessors, (12450), 0 states have call successors, (0), 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 04:17:53,787 INFO L175 Difference]: Start difference. First operand has 146 places, 233 transitions, 2639 flow. Second operand 29 states and 3054 transitions. [2023-08-31 04:17:53,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 406 transitions, 4986 flow [2023-08-31 04:17:53,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 406 transitions, 4885 flow, removed 7 selfloop flow, removed 15 redundant places. [2023-08-31 04:17:53,866 INFO L231 Difference]: Finished difference. Result has 169 places, 295 transitions, 3918 flow [2023-08-31 04:17:53,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=2526, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3918, PETRI_PLACES=169, PETRI_TRANSITIONS=295} [2023-08-31 04:17:53,868 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 148 predicate places. [2023-08-31 04:17:53,869 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 295 transitions, 3918 flow [2023-08-31 04:17:53,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 101.18181818181819) internal successors, (2226), 22 states have internal predecessors, (2226), 0 states have call successors, (0), 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 04:17:53,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:17:53,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:17:53,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-31 04:17:54,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-31 04:17:54,076 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:17:54,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:17:54,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1646219843, now seen corresponding path program 5 times [2023-08-31 04:17:54,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:17:54,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79215994] [2023-08-31 04:17:54,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:17:54,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:17:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:17:54,311 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 04:17:54,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:17:54,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79215994] [2023-08-31 04:17:54,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79215994] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:17:54,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325052900] [2023-08-31 04:17:54,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:17:54,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:17:54,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:17:54,317 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:17:54,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 04:17:54,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:17:54,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:17:54,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-31 04:17:54,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:17:54,466 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 04:17:54,506 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 04:17:54,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:17:54,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 04:17:54,845 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 04:17:54,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 168 [2023-08-31 04:17:54,954 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 04:17:54,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:17:55,802 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:17:55,804 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 137 treesize of output 89 [2023-08-31 04:17:55,828 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:17:55,828 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 808 treesize of output 688 [2023-08-31 04:17:55,861 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:17:55,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 148 [2023-08-31 04:17:55,879 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:17:55,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 81 [2023-08-31 04:17:56,504 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 04:17:56,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325052900] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:17:56,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:17:56,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-31 04:17:56,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508412091] [2023-08-31 04:17:56,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:17:56,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 04:17:56,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:17:56,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 04:17:56,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=378, Unknown=1, NotChecked=0, Total=462 [2023-08-31 04:17:58,542 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 04:18:01,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:18:04,348 WARN L539 Checker$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 04:18:04,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 415 [2023-08-31 04:18:04,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 295 transitions, 3918 flow. Second operand has 22 states, 22 states have (on average 101.18181818181819) internal successors, (2226), 22 states have internal predecessors, (2226), 0 states have call successors, (0), 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 04:18:04,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:18:04,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 415 [2023-08-31 04:18:04,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:18:13,276 WARN L222 SmtUtils]: Spent 8.22s on a formula simplification. DAG size of input: 47 DAG size of output: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:18:22,628 WARN L222 SmtUtils]: Spent 6.29s 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 04:18:30,941 WARN L222 SmtUtils]: Spent 8.26s on a formula simplification. DAG size of input: 72 DAG size of output: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:18:38,439 INFO L130 PetriNetUnfolder]: 1234/2380 cut-off events. [2023-08-31 04:18:38,439 INFO L131 PetriNetUnfolder]: For 29067/29067 co-relation queries the response was YES. [2023-08-31 04:18:38,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15953 conditions, 2380 events. 1234/2380 cut-off events. For 29067/29067 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 15879 event pairs, 134 based on Foata normal form. 46/2425 useless extension candidates. Maximal degree in co-relation 15798. Up to 1118 conditions per place. [2023-08-31 04:18:38,455 INFO L137 encePairwiseOnDemand]: 404/415 looper letters, 134 selfloop transitions, 107 changer transitions 231/472 dead transitions. [2023-08-31 04:18:38,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 472 transitions, 6476 flow [2023-08-31 04:18:38,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-31 04:18:38,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-31 04:18:38,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3471 transitions. [2023-08-31 04:18:38,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2534501642935378 [2023-08-31 04:18:38,461 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3471 transitions. [2023-08-31 04:18:38,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3471 transitions. [2023-08-31 04:18:38,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:18:38,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3471 transitions. [2023-08-31 04:18:38,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 105.18181818181819) internal successors, (3471), 33 states have internal predecessors, (3471), 0 states have call successors, (0), 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 04:18:38,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 415.0) internal successors, (14110), 34 states have internal predecessors, (14110), 0 states have call successors, (0), 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 04:18:38,476 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 415.0) internal successors, (14110), 34 states have internal predecessors, (14110), 0 states have call successors, (0), 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 04:18:38,476 INFO L175 Difference]: Start difference. First operand has 169 places, 295 transitions, 3918 flow. Second operand 33 states and 3471 transitions. [2023-08-31 04:18:38,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 472 transitions, 6476 flow [2023-08-31 04:18:38,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 472 transitions, 6082 flow, removed 103 selfloop flow, removed 12 redundant places. [2023-08-31 04:18:38,626 INFO L231 Difference]: Finished difference. Result has 201 places, 165 transitions, 2211 flow [2023-08-31 04:18:38,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=3576, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2211, PETRI_PLACES=201, PETRI_TRANSITIONS=165} [2023-08-31 04:18:38,627 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 180 predicate places. [2023-08-31 04:18:38,627 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 165 transitions, 2211 flow [2023-08-31 04:18:38,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 101.18181818181819) internal successors, (2226), 22 states have internal predecessors, (2226), 0 states have call successors, (0), 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 04:18:38,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:18:38,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:18:38,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 04:18:38,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:18:38,835 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:18:38,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:18:38,836 INFO L85 PathProgramCache]: Analyzing trace with hash -858716135, now seen corresponding path program 6 times [2023-08-31 04:18:38,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:18:38,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42331858] [2023-08-31 04:18:38,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:18:38,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:18:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:18:39,020 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 04:18:39,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:18:39,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42331858] [2023-08-31 04:18:39,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42331858] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:18:39,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173276452] [2023-08-31 04:18:39,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:18:39,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:18:39,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:18:39,025 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:18:39,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 04:18:39,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 04:18:39,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:18:39,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 04:18:39,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:18:39,199 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 04:18:39,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:18:39,294 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 04:18:39,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173276452] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:18:39,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:18:39,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-31 04:18:39,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790340686] [2023-08-31 04:18:39,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:18:39,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 04:18:39,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:18:39,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 04:18:39,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-31 04:18:39,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 415 [2023-08-31 04:18:39,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 165 transitions, 2211 flow. Second operand has 11 states, 11 states have (on average 160.0909090909091) internal successors, (1761), 11 states have internal predecessors, (1761), 0 states have call successors, (0), 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 04:18:39,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:18:39,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 415 [2023-08-31 04:18:39,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:18:39,903 INFO L130 PetriNetUnfolder]: 459/940 cut-off events. [2023-08-31 04:18:39,904 INFO L131 PetriNetUnfolder]: For 10700/10700 co-relation queries the response was YES. [2023-08-31 04:18:39,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6471 conditions, 940 events. 459/940 cut-off events. For 10700/10700 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5251 event pairs, 66 based on Foata normal form. 9/948 useless extension candidates. Maximal degree in co-relation 6401. Up to 422 conditions per place. [2023-08-31 04:18:39,913 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 145 selfloop transitions, 96 changer transitions 6/247 dead transitions. [2023-08-31 04:18:39,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 247 transitions, 3610 flow [2023-08-31 04:18:39,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 04:18:39,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 04:18:39,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2295 transitions. [2023-08-31 04:18:39,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39500860585197933 [2023-08-31 04:18:39,917 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2295 transitions. [2023-08-31 04:18:39,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2295 transitions. [2023-08-31 04:18:39,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:18:39,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2295 transitions. [2023-08-31 04:18:39,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 163.92857142857142) internal successors, (2295), 14 states have internal predecessors, (2295), 0 states have call successors, (0), 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 04:18:39,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 415.0) internal successors, (6225), 15 states have internal predecessors, (6225), 0 states have call successors, (0), 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 04:18:39,925 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 415.0) internal successors, (6225), 15 states have internal predecessors, (6225), 0 states have call successors, (0), 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 04:18:39,925 INFO L175 Difference]: Start difference. First operand has 201 places, 165 transitions, 2211 flow. Second operand 14 states and 2295 transitions. [2023-08-31 04:18:39,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 247 transitions, 3610 flow [2023-08-31 04:18:39,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 247 transitions, 2921 flow, removed 246 selfloop flow, removed 32 redundant places. [2023-08-31 04:18:39,986 INFO L231 Difference]: Finished difference. Result has 166 places, 185 transitions, 2362 flow [2023-08-31 04:18:39,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=1783, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2362, PETRI_PLACES=166, PETRI_TRANSITIONS=185} [2023-08-31 04:18:39,987 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 145 predicate places. [2023-08-31 04:18:39,987 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 185 transitions, 2362 flow [2023-08-31 04:18:39,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 160.0909090909091) internal successors, (1761), 11 states have internal predecessors, (1761), 0 states have call successors, (0), 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 04:18:39,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:18:39,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:18:39,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 04:18:40,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:18:40,194 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:18:40,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:18:40,194 INFO L85 PathProgramCache]: Analyzing trace with hash 545860189, now seen corresponding path program 7 times [2023-08-31 04:18:40,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:18:40,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827701578] [2023-08-31 04:18:40,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:18:40,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:18:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:18:40,349 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 04:18:40,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:18:40,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827701578] [2023-08-31 04:18:40,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827701578] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:18:40,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945638787] [2023-08-31 04:18:40,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:18:40,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:18:40,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:18:40,353 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:18:40,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 04:18:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:18:40,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-31 04:18:40,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:18:40,886 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 04:18:40,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2023-08-31 04:18:40,926 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 04:18:40,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:18:41,171 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:18:41,171 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 230 treesize of output 230 [2023-08-31 04:18:44,354 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 04:18:44,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945638787] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:18:44,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:18:44,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-08-31 04:18:44,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572754097] [2023-08-31 04:18:44,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:18:44,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 04:18:44,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:18:44,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 04:18:44,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-08-31 04:18:45,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 415 [2023-08-31 04:18:45,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 185 transitions, 2362 flow. Second operand has 20 states, 20 states have (on average 141.4) internal successors, (2828), 20 states have internal predecessors, (2828), 0 states have call successors, (0), 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 04:18:45,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:18:45,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 415 [2023-08-31 04:18:45,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:18:46,331 INFO L130 PetriNetUnfolder]: 507/1033 cut-off events. [2023-08-31 04:18:46,332 INFO L131 PetriNetUnfolder]: For 8107/8107 co-relation queries the response was YES. [2023-08-31 04:18:46,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6476 conditions, 1033 events. 507/1033 cut-off events. For 8107/8107 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5887 event pairs, 6 based on Foata normal form. 7/1039 useless extension candidates. Maximal degree in co-relation 6418. Up to 458 conditions per place. [2023-08-31 04:18:46,343 INFO L137 encePairwiseOnDemand]: 404/415 looper letters, 147 selfloop transitions, 117 changer transitions 25/289 dead transitions. [2023-08-31 04:18:46,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 289 transitions, 3807 flow [2023-08-31 04:18:46,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 04:18:46,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 04:18:46,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3459 transitions. [2023-08-31 04:18:46,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.347289156626506 [2023-08-31 04:18:46,348 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3459 transitions. [2023-08-31 04:18:46,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3459 transitions. [2023-08-31 04:18:46,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:18:46,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3459 transitions. [2023-08-31 04:18:46,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 144.125) internal successors, (3459), 24 states have internal predecessors, (3459), 0 states have call successors, (0), 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 04:18:46,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 415.0) internal successors, (10375), 25 states have internal predecessors, (10375), 0 states have call successors, (0), 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 04:18:46,379 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 415.0) internal successors, (10375), 25 states have internal predecessors, (10375), 0 states have call successors, (0), 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 04:18:46,379 INFO L175 Difference]: Start difference. First operand has 166 places, 185 transitions, 2362 flow. Second operand 24 states and 3459 transitions. [2023-08-31 04:18:46,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 289 transitions, 3807 flow [2023-08-31 04:18:46,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 289 transitions, 3534 flow, removed 67 selfloop flow, removed 7 redundant places. [2023-08-31 04:18:46,422 INFO L231 Difference]: Finished difference. Result has 185 places, 207 transitions, 2775 flow [2023-08-31 04:18:46,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=2173, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2775, PETRI_PLACES=185, PETRI_TRANSITIONS=207} [2023-08-31 04:18:46,423 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 164 predicate places. [2023-08-31 04:18:46,423 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 207 transitions, 2775 flow [2023-08-31 04:18:46,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 141.4) internal successors, (2828), 20 states have internal predecessors, (2828), 0 states have call successors, (0), 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 04:18:46,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:18:46,424 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:18:46,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 04:18:46,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 04:18:46,631 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:18:46,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:18:46,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1725431793, now seen corresponding path program 8 times [2023-08-31 04:18:46,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:18:46,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800566164] [2023-08-31 04:18:46,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:18:46,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:18:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:18:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:18:47,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:18:47,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800566164] [2023-08-31 04:18:47,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800566164] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:18:47,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527442112] [2023-08-31 04:18:47,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:18:47,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:18:47,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:18:47,339 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:18:47,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 04:18:47,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:18:47,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:18:47,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-31 04:18:47,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:18:48,045 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 04:18:48,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 29 [2023-08-31 04:18:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:18:48,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:18:48,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:18:48,853 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 61 [2023-08-31 04:18:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:18:49,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527442112] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:18:49,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:18:49,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 19 [2023-08-31 04:18:49,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953919575] [2023-08-31 04:18:49,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:18:49,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 04:18:49,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:18:49,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 04:18:49,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-08-31 04:18:50,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 415 [2023-08-31 04:18:50,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 207 transitions, 2775 flow. Second operand has 21 states, 21 states have (on average 145.04761904761904) internal successors, (3046), 21 states have internal predecessors, (3046), 0 states have call successors, (0), 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 04:18:50,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:18:50,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 415 [2023-08-31 04:18:50,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:18:50,819 INFO L130 PetriNetUnfolder]: 483/970 cut-off events. [2023-08-31 04:18:50,820 INFO L131 PetriNetUnfolder]: For 8302/8310 co-relation queries the response was YES. [2023-08-31 04:18:50,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6279 conditions, 970 events. 483/970 cut-off events. For 8302/8310 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5395 event pairs, 55 based on Foata normal form. 3/970 useless extension candidates. Maximal degree in co-relation 6220. Up to 800 conditions per place. [2023-08-31 04:18:50,830 INFO L137 encePairwiseOnDemand]: 407/415 looper letters, 158 selfloop transitions, 16 changer transitions 55/235 dead transitions. [2023-08-31 04:18:50,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 235 transitions, 3419 flow [2023-08-31 04:18:50,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 04:18:50,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 04:18:50,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1485 transitions. [2023-08-31 04:18:50,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3578313253012048 [2023-08-31 04:18:50,833 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1485 transitions. [2023-08-31 04:18:50,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1485 transitions. [2023-08-31 04:18:50,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:18:50,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1485 transitions. [2023-08-31 04:18:50,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 148.5) internal successors, (1485), 10 states have internal predecessors, (1485), 0 states have call successors, (0), 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 04:18:50,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 415.0) internal successors, (4565), 11 states have internal predecessors, (4565), 0 states have call successors, (0), 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 04:18:50,838 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 415.0) internal successors, (4565), 11 states have internal predecessors, (4565), 0 states have call successors, (0), 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 04:18:50,838 INFO L175 Difference]: Start difference. First operand has 185 places, 207 transitions, 2775 flow. Second operand 10 states and 1485 transitions. [2023-08-31 04:18:50,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 235 transitions, 3419 flow [2023-08-31 04:18:50,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 235 transitions, 3142 flow, removed 58 selfloop flow, removed 23 redundant places. [2023-08-31 04:18:50,890 INFO L231 Difference]: Finished difference. Result has 164 places, 175 transitions, 2180 flow [2023-08-31 04:18:50,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=2505, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2180, PETRI_PLACES=164, PETRI_TRANSITIONS=175} [2023-08-31 04:18:50,891 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 143 predicate places. [2023-08-31 04:18:50,891 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 175 transitions, 2180 flow [2023-08-31 04:18:50,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 145.04761904761904) internal successors, (3046), 21 states have internal predecessors, (3046), 0 states have call successors, (0), 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 04:18:50,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:18:50,891 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:18:50,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 04:18:51,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-31 04:18:51,097 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:18:51,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:18:51,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1271063327, now seen corresponding path program 9 times [2023-08-31 04:18:51,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:18:51,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314676709] [2023-08-31 04:18:51,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:18:51,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:18:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:18:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:51,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:18:51,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314676709] [2023-08-31 04:18:51,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314676709] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:18:51,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566880298] [2023-08-31 04:18:51,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:18:51,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:18:51,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:18:51,381 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:18:51,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 04:18:51,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 04:18:51,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:18:51,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 04:18:51,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:18:51,838 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 04:18:51,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 165 [2023-08-31 04:18:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:51,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:18:52,626 INFO L321 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2023-08-31 04:18:52,626 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 42 [2023-08-31 04:18:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:52,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566880298] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:18:52,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:18:52,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2023-08-31 04:18:52,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758098176] [2023-08-31 04:18:52,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:18:52,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 04:18:52,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:18:52,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 04:18:52,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-08-31 04:18:53,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 415 [2023-08-31 04:18:53,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 175 transitions, 2180 flow. Second operand has 17 states, 17 states have (on average 145.2941176470588) internal successors, (2470), 17 states have internal predecessors, (2470), 0 states have call successors, (0), 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 04:18:53,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:18:53,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 415 [2023-08-31 04:18:53,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:18:57,176 INFO L130 PetriNetUnfolder]: 642/1255 cut-off events. [2023-08-31 04:18:57,177 INFO L131 PetriNetUnfolder]: For 8671/8671 co-relation queries the response was YES. [2023-08-31 04:18:57,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7617 conditions, 1255 events. 642/1255 cut-off events. For 8671/8671 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7371 event pairs, 40 based on Foata normal form. 11/1265 useless extension candidates. Maximal degree in co-relation 7562. Up to 325 conditions per place. [2023-08-31 04:18:57,189 INFO L137 encePairwiseOnDemand]: 406/415 looper letters, 206 selfloop transitions, 141 changer transitions 16/363 dead transitions. [2023-08-31 04:18:57,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 363 transitions, 4352 flow [2023-08-31 04:18:57,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-31 04:18:57,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-31 04:18:57,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4504 transitions. [2023-08-31 04:18:57,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36176706827309235 [2023-08-31 04:18:57,236 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4504 transitions. [2023-08-31 04:18:57,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4504 transitions. [2023-08-31 04:18:57,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:18:57,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4504 transitions. [2023-08-31 04:18:57,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 150.13333333333333) internal successors, (4504), 30 states have internal predecessors, (4504), 0 states have call successors, (0), 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 04:18:57,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 415.0) internal successors, (12865), 31 states have internal predecessors, (12865), 0 states have call successors, (0), 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 04:18:57,253 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 415.0) internal successors, (12865), 31 states have internal predecessors, (12865), 0 states have call successors, (0), 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 04:18:57,253 INFO L175 Difference]: Start difference. First operand has 164 places, 175 transitions, 2180 flow. Second operand 30 states and 4504 transitions. [2023-08-31 04:18:57,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 363 transitions, 4352 flow [2023-08-31 04:18:57,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 363 transitions, 4154 flow, removed 46 selfloop flow, removed 10 redundant places. [2023-08-31 04:18:57,301 INFO L231 Difference]: Finished difference. Result has 172 places, 229 transitions, 3208 flow [2023-08-31 04:18:57,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=2041, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3208, PETRI_PLACES=172, PETRI_TRANSITIONS=229} [2023-08-31 04:18:57,302 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 151 predicate places. [2023-08-31 04:18:57,302 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 229 transitions, 3208 flow [2023-08-31 04:18:57,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 145.2941176470588) internal successors, (2470), 17 states have internal predecessors, (2470), 0 states have call successors, (0), 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 04:18:57,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:18:57,303 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:18:57,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 04:18:57,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-31 04:18:57,510 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:18:57,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:18:57,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1372104974, now seen corresponding path program 2 times [2023-08-31 04:18:57,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:18:57,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690892014] [2023-08-31 04:18:57,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:18:57,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:18:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:18:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:57,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:18:57,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690892014] [2023-08-31 04:18:57,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690892014] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:18:57,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801794409] [2023-08-31 04:18:57,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:18:57,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:18:57,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:18:57,697 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:18:57,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 04:18:57,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:18:57,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:18:57,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 04:18:57,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:18:57,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:57,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:18:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:58,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801794409] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:18:58,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:18:58,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 04:18:58,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159933733] [2023-08-31 04:18:58,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:18:58,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 04:18:58,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:18:58,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 04:18:58,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-08-31 04:18:58,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 415 [2023-08-31 04:18:58,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 229 transitions, 3208 flow. Second operand has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 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 04:18:58,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:18:58,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 415 [2023-08-31 04:18:58,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:18:59,667 INFO L130 PetriNetUnfolder]: 711/1369 cut-off events. [2023-08-31 04:18:59,667 INFO L131 PetriNetUnfolder]: For 10946/10946 co-relation queries the response was YES. [2023-08-31 04:18:59,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8815 conditions, 1369 events. 711/1369 cut-off events. For 10946/10946 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8047 event pairs, 141 based on Foata normal form. 8/1376 useless extension candidates. Maximal degree in co-relation 8755. Up to 716 conditions per place. [2023-08-31 04:18:59,679 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 210 selfloop transitions, 105 changer transitions 0/315 dead transitions. [2023-08-31 04:18:59,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 315 transitions, 4516 flow [2023-08-31 04:18:59,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 04:18:59,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 04:18:59,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2802 transitions. [2023-08-31 04:18:59,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39716513111268603 [2023-08-31 04:18:59,685 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2802 transitions. [2023-08-31 04:18:59,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2802 transitions. [2023-08-31 04:18:59,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:18:59,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2802 transitions. [2023-08-31 04:18:59,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 164.8235294117647) internal successors, (2802), 17 states have internal predecessors, (2802), 0 states have call successors, (0), 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 04:18:59,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 415.0) internal successors, (7470), 18 states have internal predecessors, (7470), 0 states have call successors, (0), 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 04:18:59,694 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 415.0) internal successors, (7470), 18 states have internal predecessors, (7470), 0 states have call successors, (0), 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 04:18:59,694 INFO L175 Difference]: Start difference. First operand has 172 places, 229 transitions, 3208 flow. Second operand 17 states and 2802 transitions. [2023-08-31 04:18:59,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 315 transitions, 4516 flow [2023-08-31 04:18:59,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 315 transitions, 4307 flow, removed 64 selfloop flow, removed 11 redundant places. [2023-08-31 04:18:59,763 INFO L231 Difference]: Finished difference. Result has 181 places, 257 transitions, 3714 flow [2023-08-31 04:18:59,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=3027, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3714, PETRI_PLACES=181, PETRI_TRANSITIONS=257} [2023-08-31 04:18:59,763 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 160 predicate places. [2023-08-31 04:18:59,764 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 257 transitions, 3714 flow [2023-08-31 04:18:59,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 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 04:18:59,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:18:59,764 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:18:59,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 04:18:59,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 04:18:59,971 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:18:59,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:18:59,971 INFO L85 PathProgramCache]: Analyzing trace with hash 136038158, now seen corresponding path program 3 times [2023-08-31 04:18:59,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:18:59,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172540369] [2023-08-31 04:18:59,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:18:59,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:18:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:19:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:00,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:19:00,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172540369] [2023-08-31 04:19:00,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172540369] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:19:00,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215583308] [2023-08-31 04:19:00,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:19:00,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:19:00,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:19:00,201 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:19:00,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 04:19:00,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 04:19:00,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:19:00,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 04:19:00,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:19:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:00,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:19:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:00,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215583308] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:19:00,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:19:00,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 04:19:00,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479732239] [2023-08-31 04:19:00,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:19:00,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 04:19:00,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:19:00,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 04:19:00,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-31 04:19:00,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 415 [2023-08-31 04:19:00,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 257 transitions, 3714 flow. Second operand has 12 states, 12 states have (on average 161.33333333333334) internal successors, (1936), 12 states have internal predecessors, (1936), 0 states have call successors, (0), 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 04:19:00,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:19:00,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 415 [2023-08-31 04:19:00,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:19:02,527 INFO L130 PetriNetUnfolder]: 822/1592 cut-off events. [2023-08-31 04:19:02,527 INFO L131 PetriNetUnfolder]: For 13653/13653 co-relation queries the response was YES. [2023-08-31 04:19:02,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10416 conditions, 1592 events. 822/1592 cut-off events. For 13653/13653 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 9700 event pairs, 106 based on Foata normal form. 36/1627 useless extension candidates. Maximal degree in co-relation 10353. Up to 773 conditions per place. [2023-08-31 04:19:02,539 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 202 selfloop transitions, 164 changer transitions 0/366 dead transitions. [2023-08-31 04:19:02,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 366 transitions, 5498 flow [2023-08-31 04:19:02,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 04:19:02,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 04:19:02,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2972 transitions. [2023-08-31 04:19:02,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39785809906291836 [2023-08-31 04:19:02,544 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2972 transitions. [2023-08-31 04:19:02,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2972 transitions. [2023-08-31 04:19:02,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:19:02,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2972 transitions. [2023-08-31 04:19:02,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 165.11111111111111) internal successors, (2972), 18 states have internal predecessors, (2972), 0 states have call successors, (0), 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 04:19:02,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 415.0) internal successors, (7885), 19 states have internal predecessors, (7885), 0 states have call successors, (0), 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 04:19:02,554 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 415.0) internal successors, (7885), 19 states have internal predecessors, (7885), 0 states have call successors, (0), 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 04:19:02,554 INFO L175 Difference]: Start difference. First operand has 181 places, 257 transitions, 3714 flow. Second operand 18 states and 2972 transitions. [2023-08-31 04:19:02,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 366 transitions, 5498 flow [2023-08-31 04:19:02,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 366 transitions, 5264 flow, removed 76 selfloop flow, removed 6 redundant places. [2023-08-31 04:19:02,650 INFO L231 Difference]: Finished difference. Result has 197 places, 301 transitions, 4690 flow [2023-08-31 04:19:02,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=3492, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4690, PETRI_PLACES=197, PETRI_TRANSITIONS=301} [2023-08-31 04:19:02,651 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 176 predicate places. [2023-08-31 04:19:02,651 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 301 transitions, 4690 flow [2023-08-31 04:19:02,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 161.33333333333334) internal successors, (1936), 12 states have internal predecessors, (1936), 0 states have call successors, (0), 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 04:19:02,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:19:02,652 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:19:02,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 04:19:02,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:19:02,858 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:19:02,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:19:02,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1658416748, now seen corresponding path program 4 times [2023-08-31 04:19:02,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:19:02,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007555146] [2023-08-31 04:19:02,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:19:02,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:19:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:19:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:03,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:19:03,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007555146] [2023-08-31 04:19:03,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007555146] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:19:03,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575773690] [2023-08-31 04:19:03,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:19:03,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:19:03,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:19:03,101 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:19:03,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 04:19:03,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:19:03,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:19:03,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 04:19:03,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:19:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:03,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:19:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:03,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575773690] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:19:03,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:19:03,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 04:19:03,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217303446] [2023-08-31 04:19:03,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:19:03,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 04:19:03,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:19:03,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 04:19:03,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-31 04:19:03,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 415 [2023-08-31 04:19:03,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 301 transitions, 4690 flow. Second operand has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 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 04:19:03,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:19:03,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 415 [2023-08-31 04:19:03,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:19:04,592 INFO L130 PetriNetUnfolder]: 824/1580 cut-off events. [2023-08-31 04:19:04,592 INFO L131 PetriNetUnfolder]: For 15880/15880 co-relation queries the response was YES. [2023-08-31 04:19:04,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10972 conditions, 1580 events. 824/1580 cut-off events. For 15880/15880 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 9490 event pairs, 108 based on Foata normal form. 8/1587 useless extension candidates. Maximal degree in co-relation 10904. Up to 793 conditions per place. [2023-08-31 04:19:04,602 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 192 selfloop transitions, 157 changer transitions 0/349 dead transitions. [2023-08-31 04:19:04,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 349 transitions, 5679 flow [2023-08-31 04:19:04,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 04:19:04,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 04:19:04,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2304 transitions. [2023-08-31 04:19:04,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39655765920826164 [2023-08-31 04:19:04,605 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2304 transitions. [2023-08-31 04:19:04,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2304 transitions. [2023-08-31 04:19:04,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:19:04,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2304 transitions. [2023-08-31 04:19:04,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 164.57142857142858) internal successors, (2304), 14 states have internal predecessors, (2304), 0 states have call successors, (0), 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 04:19:04,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 415.0) internal successors, (6225), 15 states have internal predecessors, (6225), 0 states have call successors, (0), 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 04:19:04,612 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 415.0) internal successors, (6225), 15 states have internal predecessors, (6225), 0 states have call successors, (0), 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 04:19:04,612 INFO L175 Difference]: Start difference. First operand has 197 places, 301 transitions, 4690 flow. Second operand 14 states and 2304 transitions. [2023-08-31 04:19:04,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 349 transitions, 5679 flow [2023-08-31 04:19:04,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 349 transitions, 5442 flow, removed 76 selfloop flow, removed 8 redundant places. [2023-08-31 04:19:04,711 INFO L231 Difference]: Finished difference. Result has 202 places, 302 transitions, 4800 flow [2023-08-31 04:19:04,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=4369, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4800, PETRI_PLACES=202, PETRI_TRANSITIONS=302} [2023-08-31 04:19:04,712 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 181 predicate places. [2023-08-31 04:19:04,712 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 302 transitions, 4800 flow [2023-08-31 04:19:04,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 160.0) internal successors, (1920), 12 states have internal predecessors, (1920), 0 states have call successors, (0), 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 04:19:04,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:19:04,713 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:19:04,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 04:19:04,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-08-31 04:19:04,919 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:19:04,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:19:04,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1109147078, now seen corresponding path program 5 times [2023-08-31 04:19:04,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:19:04,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775686068] [2023-08-31 04:19:04,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:19:04,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:19:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:19:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:05,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:19:05,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775686068] [2023-08-31 04:19:05,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775686068] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:19:05,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143174628] [2023-08-31 04:19:05,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:19:05,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:19:05,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:19:05,142 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:19:05,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 04:19:05,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:19:05,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:19:05,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 04:19:05,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:19:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:05,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:19:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:05,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143174628] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:19:05,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:19:05,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-31 04:19:05,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577044426] [2023-08-31 04:19:05,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:19:05,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 04:19:05,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:19:05,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 04:19:05,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-08-31 04:19:05,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 415 [2023-08-31 04:19:05,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 302 transitions, 4800 flow. Second operand has 13 states, 13 states have (on average 159.92307692307693) internal successors, (2079), 13 states have internal predecessors, (2079), 0 states have call successors, (0), 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 04:19:05,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:19:05,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 415 [2023-08-31 04:19:05,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:19:06,739 INFO L130 PetriNetUnfolder]: 1137/2193 cut-off events. [2023-08-31 04:19:06,740 INFO L131 PetriNetUnfolder]: For 24169/24169 co-relation queries the response was YES. [2023-08-31 04:19:06,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15417 conditions, 2193 events. 1137/2193 cut-off events. For 24169/24169 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14104 event pairs, 53 based on Foata normal form. 6/2198 useless extension candidates. Maximal degree in co-relation 15349. Up to 667 conditions per place. [2023-08-31 04:19:06,754 INFO L137 encePairwiseOnDemand]: 408/415 looper letters, 244 selfloop transitions, 249 changer transitions 0/493 dead transitions. [2023-08-31 04:19:06,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 493 transitions, 8068 flow [2023-08-31 04:19:06,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 04:19:06,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 04:19:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2980 transitions. [2023-08-31 04:19:06,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3989290495314592 [2023-08-31 04:19:06,757 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2980 transitions. [2023-08-31 04:19:06,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2980 transitions. [2023-08-31 04:19:06,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:19:06,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2980 transitions. [2023-08-31 04:19:06,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 165.55555555555554) internal successors, (2980), 18 states have internal predecessors, (2980), 0 states have call successors, (0), 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 04:19:06,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 415.0) internal successors, (7885), 19 states have internal predecessors, (7885), 0 states have call successors, (0), 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 04:19:06,765 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 415.0) internal successors, (7885), 19 states have internal predecessors, (7885), 0 states have call successors, (0), 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 04:19:06,766 INFO L175 Difference]: Start difference. First operand has 202 places, 302 transitions, 4800 flow. Second operand 18 states and 2980 transitions. [2023-08-31 04:19:06,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 493 transitions, 8068 flow [2023-08-31 04:19:06,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 493 transitions, 7690 flow, removed 46 selfloop flow, removed 10 redundant places. [2023-08-31 04:19:06,904 INFO L231 Difference]: Finished difference. Result has 218 places, 380 transitions, 6575 flow [2023-08-31 04:19:06,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=4476, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6575, PETRI_PLACES=218, PETRI_TRANSITIONS=380} [2023-08-31 04:19:06,905 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 197 predicate places. [2023-08-31 04:19:06,905 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 380 transitions, 6575 flow [2023-08-31 04:19:06,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 159.92307692307693) internal successors, (2079), 13 states have internal predecessors, (2079), 0 states have call successors, (0), 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 04:19:06,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:19:06,906 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:19:06,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 04:19:07,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:19:07,107 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:19:07,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:19:07,108 INFO L85 PathProgramCache]: Analyzing trace with hash 685307828, now seen corresponding path program 6 times [2023-08-31 04:19:07,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:19:07,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821637345] [2023-08-31 04:19:07,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:19:07,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:19:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:19:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:07,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:19:07,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821637345] [2023-08-31 04:19:07,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821637345] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:19:07,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691613413] [2023-08-31 04:19:07,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:19:07,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:19:07,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:19:07,393 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:19:07,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 04:19:07,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 04:19:07,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:19:07,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 04:19:07,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:19:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:07,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:19:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:07,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691613413] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:19:07,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:19:07,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-31 04:19:07,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778386563] [2023-08-31 04:19:07,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:19:07,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 04:19:07,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:19:07,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 04:19:07,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-08-31 04:19:08,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 415 [2023-08-31 04:19:08,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 380 transitions, 6575 flow. Second operand has 13 states, 13 states have (on average 161.23076923076923) internal successors, (2096), 13 states have internal predecessors, (2096), 0 states have call successors, (0), 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 04:19:08,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:19:08,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 415 [2023-08-31 04:19:08,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:19:09,515 INFO L130 PetriNetUnfolder]: 1122/2156 cut-off events. [2023-08-31 04:19:09,515 INFO L131 PetriNetUnfolder]: For 28120/28120 co-relation queries the response was YES. [2023-08-31 04:19:09,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16240 conditions, 2156 events. 1122/2156 cut-off events. For 28120/28120 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 13739 event pairs, 51 based on Foata normal form. 20/2175 useless extension candidates. Maximal degree in co-relation 16165. Up to 651 conditions per place. [2023-08-31 04:19:09,530 INFO L137 encePairwiseOnDemand]: 408/415 looper letters, 238 selfloop transitions, 246 changer transitions 0/484 dead transitions. [2023-08-31 04:19:09,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 484 transitions, 8585 flow [2023-08-31 04:19:09,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 04:19:09,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 04:19:09,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3308 transitions. [2023-08-31 04:19:09,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3985542168674699 [2023-08-31 04:19:09,534 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3308 transitions. [2023-08-31 04:19:09,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3308 transitions. [2023-08-31 04:19:09,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:19:09,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3308 transitions. [2023-08-31 04:19:09,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 165.4) internal successors, (3308), 20 states have internal predecessors, (3308), 0 states have call successors, (0), 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 04:19:09,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 415.0) internal successors, (8715), 21 states have internal predecessors, (8715), 0 states have call successors, (0), 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 04:19:09,543 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 415.0) internal successors, (8715), 21 states have internal predecessors, (8715), 0 states have call successors, (0), 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 04:19:09,543 INFO L175 Difference]: Start difference. First operand has 218 places, 380 transitions, 6575 flow. Second operand 20 states and 3308 transitions. [2023-08-31 04:19:09,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 484 transitions, 8585 flow [2023-08-31 04:19:09,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 484 transitions, 8209 flow, removed 139 selfloop flow, removed 7 redundant places. [2023-08-31 04:19:09,694 INFO L231 Difference]: Finished difference. Result has 235 places, 385 transitions, 6858 flow [2023-08-31 04:19:09,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=6105, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6858, PETRI_PLACES=235, PETRI_TRANSITIONS=385} [2023-08-31 04:19:09,695 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 214 predicate places. [2023-08-31 04:19:09,695 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 385 transitions, 6858 flow [2023-08-31 04:19:09,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 161.23076923076923) internal successors, (2096), 13 states have internal predecessors, (2096), 0 states have call successors, (0), 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 04:19:09,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:19:09,695 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:19:09,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-31 04:19:09,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:19:09,896 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:19:09,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:19:09,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1430013814, now seen corresponding path program 7 times [2023-08-31 04:19:09,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:19:09,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804428517] [2023-08-31 04:19:09,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:19:09,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:19:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:19:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:10,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:19:10,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804428517] [2023-08-31 04:19:10,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804428517] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:19:10,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133735895] [2023-08-31 04:19:10,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:19:10,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:19:10,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:19:10,024 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:19:10,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 04:19:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:19:10,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 04:19:10,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:19:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:10,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:19:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:10,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133735895] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:19:10,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:19:10,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-31 04:19:10,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005107713] [2023-08-31 04:19:10,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:19:10,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 04:19:10,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:19:10,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 04:19:10,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-31 04:19:10,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 415 [2023-08-31 04:19:10,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 385 transitions, 6858 flow. Second operand has 13 states, 13 states have (on average 159.92307692307693) internal successors, (2079), 13 states have internal predecessors, (2079), 0 states have call successors, (0), 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 04:19:10,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:19:10,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 415 [2023-08-31 04:19:10,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:19:11,200 INFO L130 PetriNetUnfolder]: 1119/2135 cut-off events. [2023-08-31 04:19:11,200 INFO L131 PetriNetUnfolder]: For 28054/28054 co-relation queries the response was YES. [2023-08-31 04:19:11,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16496 conditions, 2135 events. 1119/2135 cut-off events. For 28054/28054 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 13457 event pairs, 57 based on Foata normal form. 6/2140 useless extension candidates. Maximal degree in co-relation 16417. Up to 830 conditions per place. [2023-08-31 04:19:11,219 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 237 selfloop transitions, 226 changer transitions 0/463 dead transitions. [2023-08-31 04:19:11,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 463 transitions, 8557 flow [2023-08-31 04:19:11,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 04:19:11,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 04:19:11,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2475 transitions. [2023-08-31 04:19:11,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39759036144578314 [2023-08-31 04:19:11,224 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2475 transitions. [2023-08-31 04:19:11,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2475 transitions. [2023-08-31 04:19:11,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:19:11,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2475 transitions. [2023-08-31 04:19:11,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 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 04:19:11,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 415.0) internal successors, (6640), 16 states have internal predecessors, (6640), 0 states have call successors, (0), 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 04:19:11,231 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 415.0) internal successors, (6640), 16 states have internal predecessors, (6640), 0 states have call successors, (0), 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 04:19:11,231 INFO L175 Difference]: Start difference. First operand has 235 places, 385 transitions, 6858 flow. Second operand 15 states and 2475 transitions. [2023-08-31 04:19:11,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 463 transitions, 8557 flow [2023-08-31 04:19:11,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 463 transitions, 8198 flow, removed 41 selfloop flow, removed 9 redundant places. [2023-08-31 04:19:11,432 INFO L231 Difference]: Finished difference. Result has 240 places, 391 transitions, 7098 flow [2023-08-31 04:19:11,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=6421, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7098, PETRI_PLACES=240, PETRI_TRANSITIONS=391} [2023-08-31 04:19:11,433 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 219 predicate places. [2023-08-31 04:19:11,433 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 391 transitions, 7098 flow [2023-08-31 04:19:11,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 159.92307692307693) internal successors, (2079), 13 states have internal predecessors, (2079), 0 states have call successors, (0), 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 04:19:11,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:19:11,434 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:19:11,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 04:19:11,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-31 04:19:11,634 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:19:11,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:19:11,635 INFO L85 PathProgramCache]: Analyzing trace with hash 239254679, now seen corresponding path program 8 times [2023-08-31 04:19:11,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:19:11,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068318006] [2023-08-31 04:19:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:19:11,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:19:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:19:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:11,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:19:11,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068318006] [2023-08-31 04:19:11,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068318006] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:19:11,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528933105] [2023-08-31 04:19:11,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:19:11,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:19:11,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:19:11,862 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:19:11,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 04:19:12,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:19:12,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:19:12,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 04:19:12,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:19:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:12,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:19:12,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:12,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528933105] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:19:12,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:19:12,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-31 04:19:12,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042099256] [2023-08-31 04:19:12,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:19:12,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 04:19:12,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:19:12,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 04:19:12,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-31 04:19:12,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 415 [2023-08-31 04:19:12,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 391 transitions, 7098 flow. Second operand has 13 states, 13 states have (on average 161.30769230769232) internal successors, (2097), 13 states have internal predecessors, (2097), 0 states have call successors, (0), 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 04:19:12,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:19:12,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 415 [2023-08-31 04:19:12,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:19:13,667 INFO L130 PetriNetUnfolder]: 1134/2170 cut-off events. [2023-08-31 04:19:13,667 INFO L131 PetriNetUnfolder]: For 29662/29662 co-relation queries the response was YES. [2023-08-31 04:19:13,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17019 conditions, 2170 events. 1134/2170 cut-off events. For 29662/29662 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 13725 event pairs, 149 based on Foata normal form. 20/2189 useless extension candidates. Maximal degree in co-relation 16941. Up to 657 conditions per place. [2023-08-31 04:19:13,685 INFO L137 encePairwiseOnDemand]: 409/415 looper letters, 259 selfloop transitions, 218 changer transitions 0/477 dead transitions. [2023-08-31 04:19:13,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 477 transitions, 8781 flow [2023-08-31 04:19:13,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 04:19:13,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 04:19:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3294 transitions. [2023-08-31 04:19:13,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968674698795181 [2023-08-31 04:19:13,689 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3294 transitions. [2023-08-31 04:19:13,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3294 transitions. [2023-08-31 04:19:13,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:19:13,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3294 transitions. [2023-08-31 04:19:13,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 164.7) internal successors, (3294), 20 states have internal predecessors, (3294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:13,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 415.0) internal successors, (8715), 21 states have internal predecessors, (8715), 0 states have call successors, (0), 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 04:19:13,698 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 415.0) internal successors, (8715), 21 states have internal predecessors, (8715), 0 states have call successors, (0), 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 04:19:13,698 INFO L175 Difference]: Start difference. First operand has 240 places, 391 transitions, 7098 flow. Second operand 20 states and 3294 transitions. [2023-08-31 04:19:13,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 477 transitions, 8781 flow [2023-08-31 04:19:13,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 477 transitions, 8591 flow, removed 42 selfloop flow, removed 5 redundant places. [2023-08-31 04:19:13,891 INFO L231 Difference]: Finished difference. Result has 259 places, 400 transitions, 7557 flow [2023-08-31 04:19:13,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=6914, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7557, PETRI_PLACES=259, PETRI_TRANSITIONS=400} [2023-08-31 04:19:13,892 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 238 predicate places. [2023-08-31 04:19:13,892 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 400 transitions, 7557 flow [2023-08-31 04:19:13,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 161.30769230769232) internal successors, (2097), 13 states have internal predecessors, (2097), 0 states have call successors, (0), 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 04:19:13,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:19:13,893 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:19:13,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 04:19:14,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:19:14,093 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:19:14,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:19:14,094 INFO L85 PathProgramCache]: Analyzing trace with hash 955045235, now seen corresponding path program 10 times [2023-08-31 04:19:14,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:19:14,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518869047] [2023-08-31 04:19:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:19:14,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:19:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:19:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:19:14,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:19:14,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518869047] [2023-08-31 04:19:14,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518869047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:19:14,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164619023] [2023-08-31 04:19:14,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:19:14,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:19:14,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:19:14,920 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:19:14,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 04:19:15,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:19:15,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:19:15,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-31 04:19:15,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:19:15,406 INFO L321 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2023-08-31 04:19:15,406 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 189 treesize of output 183 [2023-08-31 04:19:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:19:15,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:19:16,209 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-31 04:19:16,209 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 47 treesize of output 77 [2023-08-31 04:19:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:16,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164619023] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:19:16,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:19:16,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 20 [2023-08-31 04:19:16,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711042766] [2023-08-31 04:19:16,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:19:16,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 04:19:16,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:19:16,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 04:19:16,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2023-08-31 04:19:18,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 415 [2023-08-31 04:19:18,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 400 transitions, 7557 flow. Second operand has 22 states, 22 states have (on average 140.22727272727272) internal successors, (3085), 22 states have internal predecessors, (3085), 0 states have call successors, (0), 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 04:19:18,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:19:18,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 415 [2023-08-31 04:19:18,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:19:22,236 INFO L130 PetriNetUnfolder]: 1595/2970 cut-off events. [2023-08-31 04:19:22,236 INFO L131 PetriNetUnfolder]: For 43693/43693 co-relation queries the response was YES. [2023-08-31 04:19:22,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24389 conditions, 2970 events. 1595/2970 cut-off events. For 43693/43693 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 19506 event pairs, 62 based on Foata normal form. 6/2974 useless extension candidates. Maximal degree in co-relation 24305. Up to 1052 conditions per place. [2023-08-31 04:19:22,262 INFO L137 encePairwiseOnDemand]: 404/415 looper letters, 334 selfloop transitions, 359 changer transitions 14/707 dead transitions. [2023-08-31 04:19:22,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 707 transitions, 13245 flow [2023-08-31 04:19:22,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-31 04:19:22,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-31 04:19:22,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4647 transitions. [2023-08-31 04:19:22,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34992469879518073 [2023-08-31 04:19:22,266 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4647 transitions. [2023-08-31 04:19:22,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4647 transitions. [2023-08-31 04:19:22,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:19:22,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4647 transitions. [2023-08-31 04:19:22,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 145.21875) internal successors, (4647), 32 states have internal predecessors, (4647), 0 states have call successors, (0), 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 04:19:22,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 415.0) internal successors, (13695), 33 states have internal predecessors, (13695), 0 states have call successors, (0), 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 04:19:22,280 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 415.0) internal successors, (13695), 33 states have internal predecessors, (13695), 0 states have call successors, (0), 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 04:19:22,280 INFO L175 Difference]: Start difference. First operand has 259 places, 400 transitions, 7557 flow. Second operand 32 states and 4647 transitions. [2023-08-31 04:19:22,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 707 transitions, 13245 flow [2023-08-31 04:19:22,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 707 transitions, 12879 flow, removed 86 selfloop flow, removed 9 redundant places. [2023-08-31 04:19:22,531 INFO L231 Difference]: Finished difference. Result has 291 places, 561 transitions, 11692 flow [2023-08-31 04:19:22,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=7299, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=11692, PETRI_PLACES=291, PETRI_TRANSITIONS=561} [2023-08-31 04:19:22,531 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 270 predicate places. [2023-08-31 04:19:22,532 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 561 transitions, 11692 flow [2023-08-31 04:19:22,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 140.22727272727272) internal successors, (3085), 22 states have internal predecessors, (3085), 0 states have call successors, (0), 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 04:19:22,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:19:22,532 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:19:22,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-31 04:19:22,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:19:22,733 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:19:22,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:19:22,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2133292771, now seen corresponding path program 11 times [2023-08-31 04:19:22,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:19:22,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387067536] [2023-08-31 04:19:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:19:22,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:19:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:19:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:19:23,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:19:23,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387067536] [2023-08-31 04:19:23,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387067536] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:19:23,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990509851] [2023-08-31 04:19:23,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:19:23,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:19:23,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:19:23,811 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:19:23,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 04:19:23,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:19:23,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:19:23,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-31 04:19:23,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:19:24,041 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 13 treesize of output 9 [2023-08-31 04:19:24,084 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 04:19:24,119 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 04:19:24,425 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:19:24,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 26 [2023-08-31 04:19:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:19:24,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:19:25,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:19:25,363 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 224 treesize of output 140 [2023-08-31 04:19:25,433 INFO L321 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-08-31 04:19:25,433 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 414 treesize of output 425 [2023-08-31 04:19:25,519 INFO L321 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-08-31 04:19:25,519 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 350 treesize of output 326 [2023-08-31 04:19:25,597 INFO L321 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-08-31 04:19:25,597 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 149 treesize of output 173 [2023-08-31 04:19:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:19:27,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990509851] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:19:27,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:19:27,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2023-08-31 04:19:27,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388794901] [2023-08-31 04:19:27,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:19:27,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 04:19:27,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:19:27,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 04:19:27,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=632, Unknown=3, NotChecked=0, Total=812 [2023-08-31 04:19:30,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:19:32,363 WARN L539 Checker$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 04:19:34,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:19:37,786 WARN L539 Checker$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 04:19:39,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:19:42,014 WARN L539 Checker$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 04:19:42,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 415 [2023-08-31 04:19:42,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 561 transitions, 11692 flow. Second operand has 29 states, 29 states have (on average 100.44827586206897) internal successors, (2913), 29 states have internal predecessors, (2913), 0 states have call successors, (0), 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 04:19:42,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:19:42,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 415 [2023-08-31 04:19:42,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:19:46,246 INFO L130 PetriNetUnfolder]: 1843/3522 cut-off events. [2023-08-31 04:19:46,246 INFO L131 PetriNetUnfolder]: For 61830/61830 co-relation queries the response was YES. [2023-08-31 04:19:46,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30110 conditions, 3522 events. 1843/3522 cut-off events. For 61830/61830 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 24655 event pairs, 91 based on Foata normal form. 7/3527 useless extension candidates. Maximal degree in co-relation 30018. Up to 919 conditions per place. [2023-08-31 04:19:46,279 INFO L137 encePairwiseOnDemand]: 403/415 looper letters, 203 selfloop transitions, 541 changer transitions 14/758 dead transitions. [2023-08-31 04:19:46,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 758 transitions, 16112 flow [2023-08-31 04:19:46,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-31 04:19:46,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-31 04:19:46,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3048 transitions. [2023-08-31 04:19:46,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25326132114665556 [2023-08-31 04:19:46,283 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3048 transitions. [2023-08-31 04:19:46,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3048 transitions. [2023-08-31 04:19:46,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:19:46,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3048 transitions. [2023-08-31 04:19:46,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 105.10344827586206) internal successors, (3048), 29 states have internal predecessors, (3048), 0 states have call successors, (0), 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 04:19:46,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 415.0) internal successors, (12450), 30 states have internal predecessors, (12450), 0 states have call successors, (0), 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 04:19:46,294 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 415.0) internal successors, (12450), 30 states have internal predecessors, (12450), 0 states have call successors, (0), 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 04:19:46,294 INFO L175 Difference]: Start difference. First operand has 291 places, 561 transitions, 11692 flow. Second operand 29 states and 3048 transitions. [2023-08-31 04:19:46,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 758 transitions, 16112 flow [2023-08-31 04:19:46,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 758 transitions, 15942 flow, removed 78 selfloop flow, removed 5 redundant places. [2023-08-31 04:19:46,677 INFO L231 Difference]: Finished difference. Result has 326 places, 672 transitions, 15963 flow [2023-08-31 04:19:46,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=11554, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=433, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=15963, PETRI_PLACES=326, PETRI_TRANSITIONS=672} [2023-08-31 04:19:46,677 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 305 predicate places. [2023-08-31 04:19:46,677 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 672 transitions, 15963 flow [2023-08-31 04:19:46,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 100.44827586206897) internal successors, (2913), 29 states have internal predecessors, (2913), 0 states have call successors, (0), 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 04:19:46,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:19:46,678 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:19:46,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-31 04:19:46,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:19:46,879 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:19:46,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:19:46,879 INFO L85 PathProgramCache]: Analyzing trace with hash -984517631, now seen corresponding path program 9 times [2023-08-31 04:19:46,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:19:46,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571004633] [2023-08-31 04:19:46,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:19:46,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:19:46,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:19:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:47,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:19:47,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571004633] [2023-08-31 04:19:47,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571004633] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:19:47,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121649401] [2023-08-31 04:19:47,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:19:47,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:19:47,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:19:47,069 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:19:47,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 04:19:47,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 04:19:47,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:19:47,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-31 04:19:47,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:19:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:47,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:25:52,253 WARN L222 SmtUtils]: Spent 6.04m on a formula simplification. DAG size of input: 3987 DAG size of output: 3675 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15