./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/fibonacci.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/fibonacci.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 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 12:27:22,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 12:27:22,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 12:27:22,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 12:27:22,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 12:27:22,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 12:27:22,138 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 12:27:22,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 12:27:22,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 12:27:22,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 12:27:22,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 12:27:22,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 12:27:22,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 12:27:22,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 12:27:22,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 12:27:22,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 12:27:22,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 12:27:22,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 12:27:22,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 12:27:22,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 12:27:22,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 12:27:22,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 12:27:22,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 12:27:22,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 12:27:22,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 12:27:22,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 12:27:22,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 12:27:22,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 12:27:22,178 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 12:27:22,179 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 12:27:22,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 12:27:22,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 12:27:22,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 12:27:22,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 12:27:22,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 12:27:22,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 12:27:22,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 12:27:22,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 12:27:22,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 12:27:22,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 12:27:22,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 12:27:22,190 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 12:27:22,214 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 12:27:22,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 12:27:22,216 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 12:27:22,216 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 12:27:22,217 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 12:27:22,217 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 12:27:22,218 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 12:27:22,218 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 12:27:22,219 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 12:27:22,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 12:27:22,220 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 12:27:22,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 12:27:22,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 12:27:22,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 12:27:22,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 12:27:22,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 12:27:22,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 12:27:22,221 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 12:27:22,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 12:27:22,221 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 12:27:22,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 12:27:22,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 12:27:22,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 12:27:22,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 12:27:22,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:27:22,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 12:27:22,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 12:27:22,223 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 12:27:22,223 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 12:27:22,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 12:27:22,223 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 12:27:22,224 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 12:27:22,224 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 12:27:22,224 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 12:27:22,224 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 12:27:22,225 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f56768e1b40ef6b1b210f9cfb796e99d1f27ee48ed204adfea165b19bcc995e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 12:27:22,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 12:27:22,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 12:27:22,558 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 12:27:22,559 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 12:27:22,559 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 12:27:22,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/fibonacci.wvr.c [2023-09-01 12:27:23,651 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 12:27:23,866 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 12:27:23,866 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/fibonacci.wvr.c [2023-09-01 12:27:23,874 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c45e6c363/ddc2dc45eea74a5c85beb0bf79034a03/FLAGbfe6998d5 [2023-09-01 12:27:23,896 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c45e6c363/ddc2dc45eea74a5c85beb0bf79034a03 [2023-09-01 12:27:23,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 12:27:23,899 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 12:27:23,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 12:27:23,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 12:27:23,905 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 12:27:23,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:27:23" (1/1) ... [2023-09-01 12:27:23,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41f86d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:23, skipping insertion in model container [2023-09-01 12:27:23,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:27:23" (1/1) ... [2023-09-01 12:27:23,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 12:27:23,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 12:27:24,112 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/fibonacci.wvr.c[2330,2343] [2023-09-01 12:27:24,125 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:27:24,135 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 12:27:24,170 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/fibonacci.wvr.c[2330,2343] [2023-09-01 12:27:24,177 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:27:24,190 INFO L208 MainTranslator]: Completed translation [2023-09-01 12:27:24,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:24 WrapperNode [2023-09-01 12:27:24,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 12:27:24,192 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 12:27:24,192 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 12:27:24,192 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 12:27:24,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:24" (1/1) ... [2023-09-01 12:27:24,216 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:24" (1/1) ... [2023-09-01 12:27:24,248 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 169 [2023-09-01 12:27:24,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 12:27:24,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 12:27:24,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 12:27:24,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 12:27:24,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:24" (1/1) ... [2023-09-01 12:27:24,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:24" (1/1) ... [2023-09-01 12:27:24,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:24" (1/1) ... [2023-09-01 12:27:24,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:24" (1/1) ... [2023-09-01 12:27:24,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:24" (1/1) ... [2023-09-01 12:27:24,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:24" (1/1) ... [2023-09-01 12:27:24,298 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:24" (1/1) ... [2023-09-01 12:27:24,300 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:24" (1/1) ... [2023-09-01 12:27:24,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 12:27:24,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 12:27:24,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 12:27:24,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 12:27:24,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:24" (1/1) ... [2023-09-01 12:27:24,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:27:24,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:24,333 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 12:27:24,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 12:27:24,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 12:27:24,383 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 12:27:24,383 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 12:27:24,383 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 12:27:24,383 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 12:27:24,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 12:27:24,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 12:27:24,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 12:27:24,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 12:27:24,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 12:27:24,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 12:27:24,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 12:27:24,386 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 12:27:24,468 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 12:27:24,470 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 12:27:24,705 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 12:27:24,714 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 12:27:24,714 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 12:27:24,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:27:24 BoogieIcfgContainer [2023-09-01 12:27:24,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 12:27:24,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 12:27:24,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 12:27:24,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 12:27:24,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:27:23" (1/3) ... [2023-09-01 12:27:24,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a930f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:27:24, skipping insertion in model container [2023-09-01 12:27:24,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:27:24" (2/3) ... [2023-09-01 12:27:24,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a930f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:27:24, skipping insertion in model container [2023-09-01 12:27:24,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:27:24" (3/3) ... [2023-09-01 12:27:24,739 INFO L112 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.c [2023-09-01 12:27:24,745 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 12:27:24,769 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 12:27:24,769 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 12:27:24,769 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 12:27:24,952 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 12:27:24,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 196 transitions, 408 flow [2023-09-01 12:27:25,111 INFO L130 PetriNetUnfolder]: 14/194 cut-off events. [2023-09-01 12:27:25,112 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:27:25,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 194 events. 14/194 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 288 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 119. Up to 2 conditions per place. [2023-09-01 12:27:25,120 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 196 transitions, 408 flow [2023-09-01 12:27:25,128 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 186 transitions, 384 flow [2023-09-01 12:27:25,131 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 12:27:25,145 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 186 transitions, 384 flow [2023-09-01 12:27:25,151 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 186 transitions, 384 flow [2023-09-01 12:27:25,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 186 transitions, 384 flow [2023-09-01 12:27:25,213 INFO L130 PetriNetUnfolder]: 14/186 cut-off events. [2023-09-01 12:27:25,213 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:27:25,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 186 events. 14/186 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 250 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 119. Up to 2 conditions per place. [2023-09-01 12:27:25,222 INFO L119 LiptonReduction]: Number of co-enabled transitions 7452 [2023-09-01 12:27:30,538 INFO L134 LiptonReduction]: Checked pairs total: 6342 [2023-09-01 12:27:30,538 INFO L136 LiptonReduction]: Total number of compositions: 216 [2023-09-01 12:27:30,550 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 12:27:30,555 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;@15ebfc6c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 12:27:30,556 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 12:27:30,560 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-09-01 12:27:30,561 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:27:30,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:30,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:30,562 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:30,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:30,566 INFO L85 PathProgramCache]: Analyzing trace with hash 2015475980, now seen corresponding path program 1 times [2023-09-01 12:27:30,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:30,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110760009] [2023-09-01 12:27:30,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:30,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:31,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:31,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110760009] [2023-09-01 12:27:31,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110760009] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:27:31,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:27:31,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:27:31,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066172711] [2023-09-01 12:27:31,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:27:31,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:27:31,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:31,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:27:31,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:27:31,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-09-01 12:27:31,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 5 states, 5 states have (on average 169.2) internal successors, (846), 5 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:31,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:31,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-09-01 12:27:31,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:31,551 INFO L130 PetriNetUnfolder]: 64/119 cut-off events. [2023-09-01 12:27:31,552 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-09-01 12:27:31,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 119 events. 64/119 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 334 event pairs, 3 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 181. Up to 85 conditions per place. [2023-09-01 12:27:31,555 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 23 selfloop transitions, 5 changer transitions 5/35 dead transitions. [2023-09-01 12:27:31,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 35 transitions, 166 flow [2023-09-01 12:27:31,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:27:31,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:27:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 869 transitions. [2023-09-01 12:27:31,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42184466019417477 [2023-09-01 12:27:31,581 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 869 transitions. [2023-09-01 12:27:31,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 869 transitions. [2023-09-01 12:27:31,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:31,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 869 transitions. [2023-09-01 12:27:31,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.8) internal successors, (869), 5 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:31,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:31,598 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:31,600 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 5 states and 869 transitions. [2023-09-01 12:27:31,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 35 transitions, 166 flow [2023-09-01 12:27:31,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 35 transitions, 146 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 12:27:31,604 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 68 flow [2023-09-01 12:27:31,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=68, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-09-01 12:27:31,608 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-09-01 12:27:31,608 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 68 flow [2023-09-01 12:27:31,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.2) internal successors, (846), 5 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:31,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:31,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:31,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 12:27:31,610 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:31,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:31,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1883585228, now seen corresponding path program 2 times [2023-09-01 12:27:31,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:31,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121812931] [2023-09-01 12:27:31,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:31,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:31,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:31,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121812931] [2023-09-01 12:27:31,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121812931] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:27:31,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:27:31,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:27:31,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286458832] [2023-09-01 12:27:31,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:27:31,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:27:31,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:31,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:27:31,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:27:31,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 412 [2023-09-01 12:27:31,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 68 flow. Second operand has 5 states, 5 states have (on average 169.2) internal successors, (846), 5 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:31,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:31,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 412 [2023-09-01 12:27:31,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:31,924 INFO L130 PetriNetUnfolder]: 63/111 cut-off events. [2023-09-01 12:27:31,924 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-09-01 12:27:31,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 111 events. 63/111 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 283 event pairs, 1 based on Foata normal form. 1/96 useless extension candidates. Maximal degree in co-relation 316. Up to 85 conditions per place. [2023-09-01 12:27:31,925 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 21 selfloop transitions, 6 changer transitions 5/34 dead transitions. [2023-09-01 12:27:31,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 34 transitions, 176 flow [2023-09-01 12:27:31,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:27:31,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:27:31,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 867 transitions. [2023-09-01 12:27:31,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.420873786407767 [2023-09-01 12:27:31,929 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 867 transitions. [2023-09-01 12:27:31,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 867 transitions. [2023-09-01 12:27:31,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:31,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 867 transitions. [2023-09-01 12:27:31,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.4) internal successors, (867), 5 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:31,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:31,945 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:31,945 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 68 flow. Second operand 5 states and 867 transitions. [2023-09-01 12:27:31,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 34 transitions, 176 flow [2023-09-01 12:27:31,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 34 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 12:27:31,947 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 100 flow [2023-09-01 12:27:31,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2023-09-01 12:27:31,948 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2023-09-01 12:27:31,948 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 100 flow [2023-09-01 12:27:31,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.2) internal successors, (846), 5 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:31,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:31,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:31,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 12:27:31,950 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:31,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:31,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1189875957, now seen corresponding path program 1 times [2023-09-01 12:27:31,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:31,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864738388] [2023-09-01 12:27:31,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:31,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:32,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:32,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864738388] [2023-09-01 12:27:32,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864738388] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:27:32,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:27:32,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 12:27:32,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483248646] [2023-09-01 12:27:32,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:27:32,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:27:32,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:32,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:27:32,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:27:32,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 412 [2023-09-01 12:27:32,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 173.8) internal successors, (869), 5 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:32,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:32,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 412 [2023-09-01 12:27:32,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:32,118 INFO L130 PetriNetUnfolder]: 84/157 cut-off events. [2023-09-01 12:27:32,118 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-09-01 12:27:32,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 157 events. 84/157 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 477 event pairs, 28 based on Foata normal form. 4/147 useless extension candidates. Maximal degree in co-relation 476. Up to 84 conditions per place. [2023-09-01 12:27:32,120 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 32 selfloop transitions, 6 changer transitions 6/44 dead transitions. [2023-09-01 12:27:32,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 44 transitions, 267 flow [2023-09-01 12:27:32,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:27:32,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:27:32,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 892 transitions. [2023-09-01 12:27:32,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4330097087378641 [2023-09-01 12:27:32,124 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 892 transitions. [2023-09-01 12:27:32,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 892 transitions. [2023-09-01 12:27:32,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:32,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 892 transitions. [2023-09-01 12:27:32,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 178.4) internal successors, (892), 5 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:32,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:32,131 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:32,132 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 100 flow. Second operand 5 states and 892 transitions. [2023-09-01 12:27:32,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 44 transitions, 267 flow [2023-09-01 12:27:32,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 253 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-09-01 12:27:32,135 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 127 flow [2023-09-01 12:27:32,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-09-01 12:27:32,136 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-09-01 12:27:32,137 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 127 flow [2023-09-01 12:27:32,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 173.8) internal successors, (869), 5 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:32,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:32,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:32,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 12:27:32,138 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:32,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:32,139 INFO L85 PathProgramCache]: Analyzing trace with hash 2076972385, now seen corresponding path program 2 times [2023-09-01 12:27:32,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:32,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560069482] [2023-09-01 12:27:32,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:32,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:32,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:32,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560069482] [2023-09-01 12:27:32,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560069482] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:27:32,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:27:32,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 12:27:32,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319342252] [2023-09-01 12:27:32,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:27:32,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:27:32,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:32,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:27:32,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:27:32,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 412 [2023-09-01 12:27:32,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 172.8) internal successors, (864), 5 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:32,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:32,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 412 [2023-09-01 12:27:32,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:32,316 INFO L130 PetriNetUnfolder]: 102/193 cut-off events. [2023-09-01 12:27:32,316 INFO L131 PetriNetUnfolder]: For 335/335 co-relation queries the response was YES. [2023-09-01 12:27:32,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 193 events. 102/193 cut-off events. For 335/335 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 588 event pairs, 38 based on Foata normal form. 6/179 useless extension candidates. Maximal degree in co-relation 646. Up to 128 conditions per place. [2023-09-01 12:27:32,318 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 33 selfloop transitions, 9 changer transitions 7/49 dead transitions. [2023-09-01 12:27:32,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 354 flow [2023-09-01 12:27:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 12:27:32,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 12:27:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1061 transitions. [2023-09-01 12:27:32,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292071197411003 [2023-09-01 12:27:32,323 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1061 transitions. [2023-09-01 12:27:32,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1061 transitions. [2023-09-01 12:27:32,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:32,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1061 transitions. [2023-09-01 12:27:32,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 176.83333333333334) internal successors, (1061), 6 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:32,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:32,332 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:32,332 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 127 flow. Second operand 6 states and 1061 transitions. [2023-09-01 12:27:32,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 354 flow [2023-09-01 12:27:32,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 49 transitions, 334 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-09-01 12:27:32,335 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 186 flow [2023-09-01 12:27:32,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2023-09-01 12:27:32,336 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-09-01 12:27:32,336 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 186 flow [2023-09-01 12:27:32,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 172.8) internal successors, (864), 5 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:32,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:32,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:32,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 12:27:32,338 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:32,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:32,338 INFO L85 PathProgramCache]: Analyzing trace with hash 993485807, now seen corresponding path program 1 times [2023-09-01 12:27:32,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:32,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470598102] [2023-09-01 12:27:32,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:32,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:32,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:32,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:32,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470598102] [2023-09-01 12:27:32,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470598102] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:32,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020189710] [2023-09-01 12:27:32,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:32,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:32,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:32,405 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:32,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 12:27:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:32,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 12:27:32,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:32,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:32,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020189710] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:32,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:32,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-09-01 12:27:32,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221483353] [2023-09-01 12:27:32,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:32,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 12:27:32,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:32,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 12:27:32,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 12:27:32,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:27:32,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 186 flow. Second operand has 8 states, 8 states have (on average 171.625) internal successors, (1373), 8 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:32,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:32,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:27:32,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:32,774 INFO L130 PetriNetUnfolder]: 106/197 cut-off events. [2023-09-01 12:27:32,774 INFO L131 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2023-09-01 12:27:32,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 197 events. 106/197 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 622 event pairs, 20 based on Foata normal form. 6/189 useless extension candidates. Maximal degree in co-relation 770. Up to 96 conditions per place. [2023-09-01 12:27:32,776 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 43 selfloop transitions, 8 changer transitions 1/52 dead transitions. [2023-09-01 12:27:32,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 400 flow [2023-09-01 12:27:32,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:27:32,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:27:32,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 885 transitions. [2023-09-01 12:27:32,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42961165048543687 [2023-09-01 12:27:32,780 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 885 transitions. [2023-09-01 12:27:32,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 885 transitions. [2023-09-01 12:27:32,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:32,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 885 transitions. [2023-09-01 12:27:32,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 177.0) internal successors, (885), 5 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:32,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:32,787 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:32,787 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 186 flow. Second operand 5 states and 885 transitions. [2023-09-01 12:27:32,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 400 flow [2023-09-01 12:27:32,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 52 transitions, 377 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-09-01 12:27:32,791 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 211 flow [2023-09-01 12:27:32,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-09-01 12:27:32,792 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-09-01 12:27:32,792 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 211 flow [2023-09-01 12:27:32,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 171.625) internal successors, (1373), 8 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:32,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:32,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:32,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:33,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:33,004 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:33,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:33,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1800513565, now seen corresponding path program 2 times [2023-09-01 12:27:33,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:33,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772504152] [2023-09-01 12:27:33,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:33,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:33,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:33,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:33,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772504152] [2023-09-01 12:27:33,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772504152] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:33,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863358387] [2023-09-01 12:27:33,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:27:33,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:33,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:33,099 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:33,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 12:27:33,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:27:33,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:33,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 12:27:33,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:33,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:33,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863358387] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:33,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:33,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 12:27:33,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901854743] [2023-09-01 12:27:33,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:33,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:27:33,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:33,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:27:33,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:27:33,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:27:33,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 211 flow. Second operand has 10 states, 10 states have (on average 171.3) internal successors, (1713), 10 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:33,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:33,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:27:33,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:33,469 INFO L130 PetriNetUnfolder]: 124/235 cut-off events. [2023-09-01 12:27:33,470 INFO L131 PetriNetUnfolder]: For 564/564 co-relation queries the response was YES. [2023-09-01 12:27:33,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945 conditions, 235 events. 124/235 cut-off events. For 564/564 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 806 event pairs, 16 based on Foata normal form. 6/227 useless extension candidates. Maximal degree in co-relation 773. Up to 104 conditions per place. [2023-09-01 12:27:33,473 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 54 selfloop transitions, 15 changer transitions 2/71 dead transitions. [2023-09-01 12:27:33,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 71 transitions, 537 flow [2023-09-01 12:27:33,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 12:27:33,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 12:27:33,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1413 transitions. [2023-09-01 12:27:33,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42870145631067963 [2023-09-01 12:27:33,479 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1413 transitions. [2023-09-01 12:27:33,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1413 transitions. [2023-09-01 12:27:33,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:33,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1413 transitions. [2023-09-01 12:27:33,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 176.625) internal successors, (1413), 8 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:33,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:33,489 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:33,489 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 211 flow. Second operand 8 states and 1413 transitions. [2023-09-01 12:27:33,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 71 transitions, 537 flow [2023-09-01 12:27:33,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 71 transitions, 522 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 12:27:33,493 INFO L231 Difference]: Finished difference. Result has 50 places, 36 transitions, 302 flow [2023-09-01 12:27:33,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=302, PETRI_PLACES=50, PETRI_TRANSITIONS=36} [2023-09-01 12:27:33,494 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-09-01 12:27:33,494 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 36 transitions, 302 flow [2023-09-01 12:27:33,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 171.3) internal successors, (1713), 10 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:33,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:33,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:33,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:33,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-09-01 12:27:33,701 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:33,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:33,702 INFO L85 PathProgramCache]: Analyzing trace with hash 113238829, now seen corresponding path program 3 times [2023-09-01 12:27:33,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:33,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251983153] [2023-09-01 12:27:33,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:33,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:33,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:33,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251983153] [2023-09-01 12:27:33,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251983153] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:33,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956650423] [2023-09-01 12:27:33,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:27:33,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:33,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:33,763 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:33,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 12:27:33,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:27:33,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:33,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 12:27:33,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:33,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:33,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956650423] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:33,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:33,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-09-01 12:27:33,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352149578] [2023-09-01 12:27:33,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:33,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 12:27:33,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:33,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 12:27:33,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-09-01 12:27:33,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:27:33,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 36 transitions, 302 flow. Second operand has 8 states, 8 states have (on average 171.625) internal successors, (1373), 8 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:33,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:33,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:27:33,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:34,054 INFO L130 PetriNetUnfolder]: 130/245 cut-off events. [2023-09-01 12:27:34,054 INFO L131 PetriNetUnfolder]: For 761/761 co-relation queries the response was YES. [2023-09-01 12:27:34,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 245 events. 130/245 cut-off events. For 761/761 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 847 event pairs, 16 based on Foata normal form. 4/233 useless extension candidates. Maximal degree in co-relation 855. Up to 104 conditions per place. [2023-09-01 12:27:34,056 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 40 selfloop transitions, 13 changer transitions 1/54 dead transitions. [2023-09-01 12:27:34,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 54 transitions, 505 flow [2023-09-01 12:27:34,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:27:34,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:27:34,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 881 transitions. [2023-09-01 12:27:34,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42766990291262136 [2023-09-01 12:27:34,060 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 881 transitions. [2023-09-01 12:27:34,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 881 transitions. [2023-09-01 12:27:34,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:34,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 881 transitions. [2023-09-01 12:27:34,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.2) internal successors, (881), 5 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:34,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:34,066 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:34,066 INFO L175 Difference]: Start difference. First operand has 50 places, 36 transitions, 302 flow. Second operand 5 states and 881 transitions. [2023-09-01 12:27:34,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 54 transitions, 505 flow [2023-09-01 12:27:34,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 482 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-09-01 12:27:34,072 INFO L231 Difference]: Finished difference. Result has 53 places, 38 transitions, 343 flow [2023-09-01 12:27:34,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=53, PETRI_TRANSITIONS=38} [2023-09-01 12:27:34,072 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 33 predicate places. [2023-09-01 12:27:34,073 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 38 transitions, 343 flow [2023-09-01 12:27:34,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 171.625) internal successors, (1373), 8 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:34,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:34,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:34,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:34,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:34,280 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:34,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:34,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1270574027, now seen corresponding path program 3 times [2023-09-01 12:27:34,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:34,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851885995] [2023-09-01 12:27:34,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:34,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:34,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:34,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851885995] [2023-09-01 12:27:34,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851885995] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:27:34,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:27:34,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 12:27:34,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713637984] [2023-09-01 12:27:34,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:27:34,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:27:34,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:34,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:27:34,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:27:34,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 412 [2023-09-01 12:27:34,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 38 transitions, 343 flow. Second operand has 5 states, 5 states have (on average 172.8) internal successors, (864), 5 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:34,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:34,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 412 [2023-09-01 12:27:34,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:34,478 INFO L130 PetriNetUnfolder]: 122/229 cut-off events. [2023-09-01 12:27:34,478 INFO L131 PetriNetUnfolder]: For 936/936 co-relation queries the response was YES. [2023-09-01 12:27:34,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1039 conditions, 229 events. 122/229 cut-off events. For 936/936 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 763 event pairs, 40 based on Foata normal form. 6/219 useless extension candidates. Maximal degree in co-relation 921. Up to 160 conditions per place. [2023-09-01 12:27:34,480 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 36 selfloop transitions, 11 changer transitions 9/56 dead transitions. [2023-09-01 12:27:34,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 56 transitions, 512 flow [2023-09-01 12:27:34,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 12:27:34,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 12:27:34,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1062 transitions. [2023-09-01 12:27:34,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42961165048543687 [2023-09-01 12:27:34,484 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1062 transitions. [2023-09-01 12:27:34,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1062 transitions. [2023-09-01 12:27:34,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:34,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1062 transitions. [2023-09-01 12:27:34,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 177.0) internal successors, (1062), 6 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:34,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:34,492 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 412.0) internal successors, (2884), 7 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:34,493 INFO L175 Difference]: Start difference. First operand has 53 places, 38 transitions, 343 flow. Second operand 6 states and 1062 transitions. [2023-09-01 12:27:34,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 56 transitions, 512 flow [2023-09-01 12:27:34,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 56 transitions, 495 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 12:27:34,498 INFO L231 Difference]: Finished difference. Result has 56 places, 34 transitions, 296 flow [2023-09-01 12:27:34,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=56, PETRI_TRANSITIONS=34} [2023-09-01 12:27:34,501 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2023-09-01 12:27:34,501 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 34 transitions, 296 flow [2023-09-01 12:27:34,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 172.8) internal successors, (864), 5 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:34,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:34,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:34,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 12:27:34,503 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:34,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:34,503 INFO L85 PathProgramCache]: Analyzing trace with hash -691740739, now seen corresponding path program 4 times [2023-09-01 12:27:34,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:34,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572950995] [2023-09-01 12:27:34,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:34,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:34,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:34,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:34,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572950995] [2023-09-01 12:27:34,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572950995] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:34,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766533356] [2023-09-01 12:27:34,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:27:34,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:34,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:34,577 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:34,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 12:27:34,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:27:34,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:34,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 12:27:34,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:34,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:34,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766533356] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:34,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:34,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 12:27:34,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804093985] [2023-09-01 12:27:34,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:34,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:27:34,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:34,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:27:34,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:27:34,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:27:34,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 34 transitions, 296 flow. Second operand has 10 states, 10 states have (on average 171.3) internal successors, (1713), 10 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:34,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:34,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:27:34,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:34,874 INFO L130 PetriNetUnfolder]: 122/219 cut-off events. [2023-09-01 12:27:34,875 INFO L131 PetriNetUnfolder]: For 783/783 co-relation queries the response was YES. [2023-09-01 12:27:34,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1006 conditions, 219 events. 122/219 cut-off events. For 783/783 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 669 event pairs, 43 based on Foata normal form. 4/205 useless extension candidates. Maximal degree in co-relation 985. Up to 161 conditions per place. [2023-09-01 12:27:34,877 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 37 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2023-09-01 12:27:34,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 48 transitions, 449 flow [2023-09-01 12:27:34,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:27:34,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:27:34,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 880 transitions. [2023-09-01 12:27:34,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42718446601941745 [2023-09-01 12:27:34,880 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 880 transitions. [2023-09-01 12:27:34,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 880 transitions. [2023-09-01 12:27:34,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:34,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 880 transitions. [2023-09-01 12:27:34,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:34,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:34,886 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:34,886 INFO L175 Difference]: Start difference. First operand has 56 places, 34 transitions, 296 flow. Second operand 5 states and 880 transitions. [2023-09-01 12:27:34,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 48 transitions, 449 flow [2023-09-01 12:27:34,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 48 transitions, 400 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-09-01 12:27:34,890 INFO L231 Difference]: Finished difference. Result has 51 places, 35 transitions, 285 flow [2023-09-01 12:27:34,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=285, PETRI_PLACES=51, PETRI_TRANSITIONS=35} [2023-09-01 12:27:34,891 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 31 predicate places. [2023-09-01 12:27:34,891 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 35 transitions, 285 flow [2023-09-01 12:27:34,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 171.3) internal successors, (1713), 10 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:34,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:34,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:34,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:35,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:35,098 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:35,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:35,098 INFO L85 PathProgramCache]: Analyzing trace with hash -935224503, now seen corresponding path program 4 times [2023-09-01 12:27:35,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:35,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017207238] [2023-09-01 12:27:35,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:35,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:35,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:35,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017207238] [2023-09-01 12:27:35,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017207238] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:35,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386934469] [2023-09-01 12:27:35,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:27:35,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:35,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:35,164 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:35,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 12:27:35,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:27:35,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:35,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 12:27:35,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:35,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:35,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386934469] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:35,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:35,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 12:27:35,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339224559] [2023-09-01 12:27:35,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:35,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:27:35,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:35,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:27:35,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:27:35,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:27:35,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 35 transitions, 285 flow. Second operand has 10 states, 10 states have (on average 171.3) internal successors, (1713), 10 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:35,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:35,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:27:35,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:35,451 INFO L130 PetriNetUnfolder]: 114/203 cut-off events. [2023-09-01 12:27:35,451 INFO L131 PetriNetUnfolder]: For 575/575 co-relation queries the response was YES. [2023-09-01 12:27:35,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 203 events. 114/203 cut-off events. For 575/575 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 589 event pairs, 37 based on Foata normal form. 6/191 useless extension candidates. Maximal degree in co-relation 900. Up to 153 conditions per place. [2023-09-01 12:27:35,452 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 33 selfloop transitions, 12 changer transitions 0/45 dead transitions. [2023-09-01 12:27:35,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 45 transitions, 408 flow [2023-09-01 12:27:35,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:27:35,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:27:35,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 877 transitions. [2023-09-01 12:27:35,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42572815533980585 [2023-09-01 12:27:35,455 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 877 transitions. [2023-09-01 12:27:35,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 877 transitions. [2023-09-01 12:27:35,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:35,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 877 transitions. [2023-09-01 12:27:35,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 175.4) internal successors, (877), 5 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:35,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:35,460 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 412.0) internal successors, (2472), 6 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:35,461 INFO L175 Difference]: Start difference. First operand has 51 places, 35 transitions, 285 flow. Second operand 5 states and 877 transitions. [2023-09-01 12:27:35,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 45 transitions, 408 flow [2023-09-01 12:27:35,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 45 transitions, 392 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 12:27:35,464 INFO L231 Difference]: Finished difference. Result has 52 places, 34 transitions, 282 flow [2023-09-01 12:27:35,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=52, PETRI_TRANSITIONS=34} [2023-09-01 12:27:35,464 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2023-09-01 12:27:35,464 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 34 transitions, 282 flow [2023-09-01 12:27:35,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 171.3) internal successors, (1713), 10 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:35,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:35,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:35,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:35,671 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,SelfDestructingSolverStorable9 [2023-09-01 12:27:35,671 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:35,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:35,672 INFO L85 PathProgramCache]: Analyzing trace with hash 899158593, now seen corresponding path program 5 times [2023-09-01 12:27:35,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:35,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69143928] [2023-09-01 12:27:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:35,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:35,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:35,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69143928] [2023-09-01 12:27:35,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69143928] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:35,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525176870] [2023-09-01 12:27:35,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:27:35,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:35,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:35,733 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:35,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 12:27:35,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:27:35,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:35,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 12:27:35,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:35,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:35,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525176870] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:35,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:35,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 12:27:35,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968935728] [2023-09-01 12:27:35,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:35,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:27:35,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:35,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:27:35,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:27:35,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:27:35,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 34 transitions, 282 flow. Second operand has 10 states, 10 states have (on average 171.5) internal successors, (1715), 10 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:35,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:35,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:27:35,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:36,047 INFO L130 PetriNetUnfolder]: 110/193 cut-off events. [2023-09-01 12:27:36,047 INFO L131 PetriNetUnfolder]: For 573/573 co-relation queries the response was YES. [2023-09-01 12:27:36,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 898 conditions, 193 events. 110/193 cut-off events. For 573/573 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 569 event pairs, 9 based on Foata normal form. 4/181 useless extension candidates. Maximal degree in co-relation 878. Up to 86 conditions per place. [2023-09-01 12:27:36,049 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 37 selfloop transitions, 17 changer transitions 0/54 dead transitions. [2023-09-01 12:27:36,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 54 transitions, 474 flow [2023-09-01 12:27:36,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 12:27:36,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 12:27:36,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1396 transitions. [2023-09-01 12:27:36,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42354368932038833 [2023-09-01 12:27:36,053 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1396 transitions. [2023-09-01 12:27:36,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1396 transitions. [2023-09-01 12:27:36,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:36,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1396 transitions. [2023-09-01 12:27:36,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 174.5) internal successors, (1396), 8 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:36,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:36,077 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:36,077 INFO L175 Difference]: Start difference. First operand has 52 places, 34 transitions, 282 flow. Second operand 8 states and 1396 transitions. [2023-09-01 12:27:36,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 54 transitions, 474 flow [2023-09-01 12:27:36,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 54 transitions, 426 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-09-01 12:27:36,080 INFO L231 Difference]: Finished difference. Result has 51 places, 35 transitions, 277 flow [2023-09-01 12:27:36,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=277, PETRI_PLACES=51, PETRI_TRANSITIONS=35} [2023-09-01 12:27:36,081 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 31 predicate places. [2023-09-01 12:27:36,081 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 35 transitions, 277 flow [2023-09-01 12:27:36,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 171.5) internal successors, (1715), 10 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:36,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:36,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:36,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:36,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:36,287 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:36,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:36,288 INFO L85 PathProgramCache]: Analyzing trace with hash -538177452, now seen corresponding path program 1 times [2023-09-01 12:27:36,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:36,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990865679] [2023-09-01 12:27:36,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:36,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:36,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:36,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990865679] [2023-09-01 12:27:36,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990865679] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:36,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777629939] [2023-09-01 12:27:36,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:36,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:36,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:36,572 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:36,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 12:27:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:36,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 12:27:36,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:36,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:37,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777629939] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:37,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:37,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 12:27:37,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908409631] [2023-09-01 12:27:37,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:37,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:27:37,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:37,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:27:37,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:27:37,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-09-01 12:27:37,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 35 transitions, 277 flow. Second operand has 12 states, 12 states have (on average 163.5) internal successors, (1962), 12 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:37,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:37,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-09-01 12:27:37,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:37,361 INFO L130 PetriNetUnfolder]: 132/238 cut-off events. [2023-09-01 12:27:37,361 INFO L131 PetriNetUnfolder]: For 578/598 co-relation queries the response was YES. [2023-09-01 12:27:37,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1048 conditions, 238 events. 132/238 cut-off events. For 578/598 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 814 event pairs, 6 based on Foata normal form. 11/242 useless extension candidates. Maximal degree in co-relation 1030. Up to 167 conditions per place. [2023-09-01 12:27:37,363 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 36 selfloop transitions, 17 changer transitions 5/64 dead transitions. [2023-09-01 12:27:37,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 64 transitions, 519 flow [2023-09-01 12:27:37,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:27:37,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:27:37,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1167 transitions. [2023-09-01 12:27:37,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40464632454923716 [2023-09-01 12:27:37,367 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1167 transitions. [2023-09-01 12:27:37,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1167 transitions. [2023-09-01 12:27:37,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:37,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1167 transitions. [2023-09-01 12:27:37,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 166.71428571428572) internal successors, (1167), 7 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:37,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:37,374 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:37,374 INFO L175 Difference]: Start difference. First operand has 51 places, 35 transitions, 277 flow. Second operand 7 states and 1167 transitions. [2023-09-01 12:27:37,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 64 transitions, 519 flow [2023-09-01 12:27:37,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 64 transitions, 470 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-09-01 12:27:37,378 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 370 flow [2023-09-01 12:27:37,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=370, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-09-01 12:27:37,378 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 34 predicate places. [2023-09-01 12:27:37,379 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 370 flow [2023-09-01 12:27:37,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.5) internal successors, (1962), 12 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:37,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:37,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:37,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:37,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:37,596 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:37,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:37,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1242983908, now seen corresponding path program 2 times [2023-09-01 12:27:37,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:37,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688316339] [2023-09-01 12:27:37,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:37,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:37,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:37,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688316339] [2023-09-01 12:27:37,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688316339] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:37,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124829161] [2023-09-01 12:27:37,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:27:37,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:37,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:37,969 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:37,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 12:27:38,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:27:38,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:38,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 12:27:38,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:38,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:38,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124829161] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:38,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:38,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-09-01 12:27:38,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524752530] [2023-09-01 12:27:38,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:38,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 12:27:38,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:38,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 12:27:38,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-09-01 12:27:38,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-09-01 12:27:38,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 370 flow. Second operand has 14 states, 14 states have (on average 163.42857142857142) internal successors, (2288), 14 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:38,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:38,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-09-01 12:27:38,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:38,634 INFO L130 PetriNetUnfolder]: 144/264 cut-off events. [2023-09-01 12:27:38,634 INFO L131 PetriNetUnfolder]: For 828/858 co-relation queries the response was YES. [2023-09-01 12:27:38,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1242 conditions, 264 events. 144/264 cut-off events. For 828/858 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 950 event pairs, 8 based on Foata normal form. 11/268 useless extension candidates. Maximal degree in co-relation 1222. Up to 171 conditions per place. [2023-09-01 12:27:38,637 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 40 selfloop transitions, 20 changer transitions 5/71 dead transitions. [2023-09-01 12:27:38,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 71 transitions, 604 flow [2023-09-01 12:27:38,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:27:38,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:27:38,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1172 transitions. [2023-09-01 12:27:38,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.406380027739251 [2023-09-01 12:27:38,640 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1172 transitions. [2023-09-01 12:27:38,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1172 transitions. [2023-09-01 12:27:38,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:38,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1172 transitions. [2023-09-01 12:27:38,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.42857142857142) internal successors, (1172), 7 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:38,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:38,647 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:38,648 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 370 flow. Second operand 7 states and 1172 transitions. [2023-09-01 12:27:38,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 71 transitions, 604 flow [2023-09-01 12:27:38,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 571 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-09-01 12:27:38,652 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 439 flow [2023-09-01 12:27:38,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=439, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2023-09-01 12:27:38,653 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2023-09-01 12:27:38,653 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 439 flow [2023-09-01 12:27:38,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.42857142857142) internal successors, (2288), 14 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:38,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:38,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:38,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:38,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 12:27:38,861 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:38,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:38,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1215278278, now seen corresponding path program 3 times [2023-09-01 12:27:38,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:38,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85561317] [2023-09-01 12:27:38,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:38,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:39,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:39,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85561317] [2023-09-01 12:27:39,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85561317] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:39,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291277296] [2023-09-01 12:27:39,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:27:39,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:39,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:39,115 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:39,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 12:27:39,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 12:27:39,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:39,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 12:27:39,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:39,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:39,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291277296] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:39,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:39,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 12:27:39,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091421556] [2023-09-01 12:27:39,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:39,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:27:39,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:39,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:27:39,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:27:39,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-09-01 12:27:39,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 439 flow. Second operand has 12 states, 12 states have (on average 163.66666666666666) internal successors, (1964), 12 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:39,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:39,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-09-01 12:27:39,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:39,825 INFO L130 PetriNetUnfolder]: 141/255 cut-off events. [2023-09-01 12:27:39,825 INFO L131 PetriNetUnfolder]: For 1187/1213 co-relation queries the response was YES. [2023-09-01 12:27:39,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1292 conditions, 255 events. 141/255 cut-off events. For 1187/1213 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 900 event pairs, 8 based on Foata normal form. 9/257 useless extension candidates. Maximal degree in co-relation 1269. Up to 171 conditions per place. [2023-09-01 12:27:39,828 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 36 selfloop transitions, 21 changer transitions 5/68 dead transitions. [2023-09-01 12:27:39,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 68 transitions, 636 flow [2023-09-01 12:27:39,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:27:39,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:27:39,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1168 transitions. [2023-09-01 12:27:39,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40499306518723993 [2023-09-01 12:27:39,831 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1168 transitions. [2023-09-01 12:27:39,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1168 transitions. [2023-09-01 12:27:39,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:39,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1168 transitions. [2023-09-01 12:27:39,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 166.85714285714286) internal successors, (1168), 7 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:39,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:39,837 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:39,838 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 439 flow. Second operand 7 states and 1168 transitions. [2023-09-01 12:27:39,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 68 transitions, 636 flow [2023-09-01 12:27:39,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 68 transitions, 578 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-09-01 12:27:39,843 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 471 flow [2023-09-01 12:27:39,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=471, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2023-09-01 12:27:39,843 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 45 predicate places. [2023-09-01 12:27:39,843 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 471 flow [2023-09-01 12:27:39,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.66666666666666) internal successors, (1964), 12 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:39,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:39,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:39,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:40,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 12:27:40,050 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:40,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:40,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1742862228, now seen corresponding path program 4 times [2023-09-01 12:27:40,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:40,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490654189] [2023-09-01 12:27:40,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:40,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:40,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:40,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:40,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490654189] [2023-09-01 12:27:40,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490654189] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:40,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209095329] [2023-09-01 12:27:40,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:27:40,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:40,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:40,415 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:40,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 12:27:40,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:27:40,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:40,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 12:27:40,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:40,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:40,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:40,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209095329] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:40,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:40,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-09-01 12:27:40,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008208603] [2023-09-01 12:27:40,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:40,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-09-01 12:27:40,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:40,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-09-01 12:27:40,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-09-01 12:27:40,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-09-01 12:27:40,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 471 flow. Second operand has 10 states, 10 states have (on average 163.5) internal successors, (1635), 10 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:40,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:40,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-09-01 12:27:40,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:41,056 INFO L130 PetriNetUnfolder]: 166/298 cut-off events. [2023-09-01 12:27:41,057 INFO L131 PetriNetUnfolder]: For 1428/1454 co-relation queries the response was YES. [2023-09-01 12:27:41,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1559 conditions, 298 events. 166/298 cut-off events. For 1428/1454 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1112 event pairs, 10 based on Foata normal form. 9/300 useless extension candidates. Maximal degree in co-relation 1533. Up to 244 conditions per place. [2023-09-01 12:27:41,060 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 44 selfloop transitions, 17 changer transitions 5/72 dead transitions. [2023-09-01 12:27:41,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 72 transitions, 723 flow [2023-09-01 12:27:41,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:27:41,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:27:41,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1159 transitions. [2023-09-01 12:27:41,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40187239944521497 [2023-09-01 12:27:41,072 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1159 transitions. [2023-09-01 12:27:41,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1159 transitions. [2023-09-01 12:27:41,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:41,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1159 transitions. [2023-09-01 12:27:41,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 165.57142857142858) internal successors, (1159), 7 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:41,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:41,078 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:41,078 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 471 flow. Second operand 7 states and 1159 transitions. [2023-09-01 12:27:41,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 72 transitions, 723 flow [2023-09-01 12:27:41,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 72 transitions, 674 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-09-01 12:27:41,086 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 574 flow [2023-09-01 12:27:41,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=574, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2023-09-01 12:27:41,087 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 49 predicate places. [2023-09-01 12:27:41,087 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 574 flow [2023-09-01 12:27:41,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.5) internal successors, (1635), 10 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:41,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:41,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:41,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:41,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 12:27:41,294 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:41,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:41,294 INFO L85 PathProgramCache]: Analyzing trace with hash -433241830, now seen corresponding path program 5 times [2023-09-01 12:27:41,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:41,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900105704] [2023-09-01 12:27:41,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:41,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:41,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:41,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900105704] [2023-09-01 12:27:41,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900105704] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:41,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481835661] [2023-09-01 12:27:41,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:27:41,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:41,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:41,549 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) [2023-09-01 12:27:41,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 12:27:41,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 12:27:41,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:41,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 12:27:41,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:41,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:41,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:41,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481835661] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:41,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:41,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-09-01 12:27:41,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881305920] [2023-09-01 12:27:41,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:41,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 12:27:41,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:41,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 12:27:41,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-09-01 12:27:42,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-09-01 12:27:42,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 574 flow. Second operand has 14 states, 14 states have (on average 163.42857142857142) internal successors, (2288), 14 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:42,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:42,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-09-01 12:27:42,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:42,273 INFO L130 PetriNetUnfolder]: 180/326 cut-off events. [2023-09-01 12:27:42,273 INFO L131 PetriNetUnfolder]: For 1850/1876 co-relation queries the response was YES. [2023-09-01 12:27:42,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1782 conditions, 326 events. 180/326 cut-off events. For 1850/1876 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1257 event pairs, 14 based on Foata normal form. 9/328 useless extension candidates. Maximal degree in co-relation 1754. Up to 248 conditions per place. [2023-09-01 12:27:42,276 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 50 selfloop transitions, 20 changer transitions 5/81 dead transitions. [2023-09-01 12:27:42,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 81 transitions, 837 flow [2023-09-01 12:27:42,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:27:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:27:42,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1166 transitions. [2023-09-01 12:27:42,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4042995839112344 [2023-09-01 12:27:42,280 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1166 transitions. [2023-09-01 12:27:42,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1166 transitions. [2023-09-01 12:27:42,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:42,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1166 transitions. [2023-09-01 12:27:42,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 166.57142857142858) internal successors, (1166), 7 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:42,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:42,287 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:42,287 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 574 flow. Second operand 7 states and 1166 transitions. [2023-09-01 12:27:42,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 81 transitions, 837 flow [2023-09-01 12:27:42,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 796 flow, removed 17 selfloop flow, removed 2 redundant places. [2023-09-01 12:27:42,298 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 651 flow [2023-09-01 12:27:42,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=651, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2023-09-01 12:27:42,299 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 55 predicate places. [2023-09-01 12:27:42,299 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 651 flow [2023-09-01 12:27:42,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.42857142857142) internal successors, (2288), 14 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:42,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:42,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:42,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:42,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 12:27:42,512 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:42,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:42,512 INFO L85 PathProgramCache]: Analyzing trace with hash -405536200, now seen corresponding path program 6 times [2023-09-01 12:27:42,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:42,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079273692] [2023-09-01 12:27:42,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:42,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:42,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:42,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079273692] [2023-09-01 12:27:42,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079273692] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:42,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890940236] [2023-09-01 12:27:42,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:27:42,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:42,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:42,765 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) [2023-09-01 12:27:42,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 12:27:42,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 12:27:42,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:42,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 12:27:42,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:42,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:43,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:43,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890940236] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:43,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:43,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-09-01 12:27:43,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873444154] [2023-09-01 12:27:43,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:43,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 12:27:43,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:43,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 12:27:43,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-09-01 12:27:43,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-09-01 12:27:43,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 651 flow. Second operand has 14 states, 14 states have (on average 163.42857142857142) internal successors, (2288), 14 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:43,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:43,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-09-01 12:27:43,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:43,492 INFO L130 PetriNetUnfolder]: 177/317 cut-off events. [2023-09-01 12:27:43,492 INFO L131 PetriNetUnfolder]: For 2219/2245 co-relation queries the response was YES. [2023-09-01 12:27:43,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1808 conditions, 317 events. 177/317 cut-off events. For 2219/2245 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1211 event pairs, 14 based on Foata normal form. 9/319 useless extension candidates. Maximal degree in co-relation 1777. Up to 248 conditions per place. [2023-09-01 12:27:43,495 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 48 selfloop transitions, 21 changer transitions 5/80 dead transitions. [2023-09-01 12:27:43,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 80 transitions, 874 flow [2023-09-01 12:27:43,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:27:43,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:27:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1164 transitions. [2023-09-01 12:27:43,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40360610263522884 [2023-09-01 12:27:43,500 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1164 transitions. [2023-09-01 12:27:43,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1164 transitions. [2023-09-01 12:27:43,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:43,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1164 transitions. [2023-09-01 12:27:43,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 166.28571428571428) internal successors, (1164), 7 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:43,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:43,507 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:43,508 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 651 flow. Second operand 7 states and 1164 transitions. [2023-09-01 12:27:43,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 80 transitions, 874 flow [2023-09-01 12:27:43,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 80 transitions, 794 flow, removed 31 selfloop flow, removed 3 redundant places. [2023-09-01 12:27:43,515 INFO L231 Difference]: Finished difference. Result has 80 places, 67 transitions, 671 flow [2023-09-01 12:27:43,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=671, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2023-09-01 12:27:43,516 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2023-09-01 12:27:43,516 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 671 flow [2023-09-01 12:27:43,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.42857142857142) internal successors, (2288), 14 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:43,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:43,517 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:43,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:43,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 12:27:43,724 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:43,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:43,724 INFO L85 PathProgramCache]: Analyzing trace with hash -292778433, now seen corresponding path program 7 times [2023-09-01 12:27:43,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:43,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866859117] [2023-09-01 12:27:43,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:43,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:43,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:43,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866859117] [2023-09-01 12:27:43,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866859117] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:43,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625699718] [2023-09-01 12:27:43,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:27:43,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:43,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:43,808 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) [2023-09-01 12:27:43,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 12:27:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:43,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:27:43,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:43,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:43,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625699718] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:43,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:43,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-09-01 12:27:43,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930533885] [2023-09-01 12:27:43,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:43,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:27:43,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:43,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:27:43,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-09-01 12:27:44,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:27:44,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 67 transitions, 671 flow. Second operand has 11 states, 11 states have (on average 171.1818181818182) internal successors, (1883), 11 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:44,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:44,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:27:44,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:44,205 INFO L130 PetriNetUnfolder]: 228/403 cut-off events. [2023-09-01 12:27:44,205 INFO L131 PetriNetUnfolder]: For 2406/2406 co-relation queries the response was YES. [2023-09-01 12:27:44,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2255 conditions, 403 events. 228/403 cut-off events. For 2406/2406 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1569 event pairs, 15 based on Foata normal form. 6/409 useless extension candidates. Maximal degree in co-relation 2221. Up to 154 conditions per place. [2023-09-01 12:27:44,209 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 75 selfloop transitions, 28 changer transitions 0/103 dead transitions. [2023-09-01 12:27:44,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 1146 flow [2023-09-01 12:27:44,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:27:44,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:27:44,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1236 transitions. [2023-09-01 12:27:44,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-09-01 12:27:44,211 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1236 transitions. [2023-09-01 12:27:44,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1236 transitions. [2023-09-01 12:27:44,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:44,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1236 transitions. [2023-09-01 12:27:44,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 176.57142857142858) internal successors, (1236), 7 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:44,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:44,217 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:44,217 INFO L175 Difference]: Start difference. First operand has 80 places, 67 transitions, 671 flow. Second operand 7 states and 1236 transitions. [2023-09-01 12:27:44,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 1146 flow [2023-09-01 12:27:44,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 103 transitions, 1081 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-09-01 12:27:44,231 INFO L231 Difference]: Finished difference. Result has 85 places, 71 transitions, 764 flow [2023-09-01 12:27:44,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=764, PETRI_PLACES=85, PETRI_TRANSITIONS=71} [2023-09-01 12:27:44,232 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 65 predicate places. [2023-09-01 12:27:44,232 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 71 transitions, 764 flow [2023-09-01 12:27:44,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 171.1818181818182) internal successors, (1883), 11 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:44,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:44,233 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:44,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:44,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 12:27:44,438 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:44,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:44,439 INFO L85 PathProgramCache]: Analyzing trace with hash 588770887, now seen corresponding path program 8 times [2023-09-01 12:27:44,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:44,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385648059] [2023-09-01 12:27:44,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:44,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:44,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:44,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385648059] [2023-09-01 12:27:44,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385648059] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:44,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093589684] [2023-09-01 12:27:44,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:27:44,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:44,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:44,509 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) [2023-09-01 12:27:44,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 12:27:44,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:27:44,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:44,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:27:44,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:44,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:44,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093589684] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:44,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:44,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-09-01 12:27:44,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380113729] [2023-09-01 12:27:44,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:44,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:27:44,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:44,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:27:44,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-09-01 12:27:44,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:27:44,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 71 transitions, 764 flow. Second operand has 11 states, 11 states have (on average 171.36363636363637) internal successors, (1885), 11 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:44,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:44,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:27:44,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:44,881 INFO L130 PetriNetUnfolder]: 230/413 cut-off events. [2023-09-01 12:27:44,881 INFO L131 PetriNetUnfolder]: For 3259/3259 co-relation queries the response was YES. [2023-09-01 12:27:44,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2437 conditions, 413 events. 230/413 cut-off events. For 3259/3259 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1669 event pairs, 35 based on Foata normal form. 4/417 useless extension candidates. Maximal degree in co-relation 2400. Up to 153 conditions per place. [2023-09-01 12:27:44,886 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 65 selfloop transitions, 43 changer transitions 10/118 dead transitions. [2023-09-01 12:27:44,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 118 transitions, 1335 flow [2023-09-01 12:27:44,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:27:44,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:27:44,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1921 transitions. [2023-09-01 12:27:44,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238746690203001 [2023-09-01 12:27:44,891 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1921 transitions. [2023-09-01 12:27:44,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1921 transitions. [2023-09-01 12:27:44,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:44,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1921 transitions. [2023-09-01 12:27:44,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 174.63636363636363) internal successors, (1921), 11 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:44,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:44,900 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:44,900 INFO L175 Difference]: Start difference. First operand has 85 places, 71 transitions, 764 flow. Second operand 11 states and 1921 transitions. [2023-09-01 12:27:44,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 118 transitions, 1335 flow [2023-09-01 12:27:44,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 118 transitions, 1288 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-09-01 12:27:44,913 INFO L231 Difference]: Finished difference. Result has 98 places, 83 transitions, 1012 flow [2023-09-01 12:27:44,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1012, PETRI_PLACES=98, PETRI_TRANSITIONS=83} [2023-09-01 12:27:44,914 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 78 predicate places. [2023-09-01 12:27:44,914 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 83 transitions, 1012 flow [2023-09-01 12:27:44,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 171.36363636363637) internal successors, (1885), 11 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:44,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:44,915 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:44,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:45,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:45,123 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:45,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:45,124 INFO L85 PathProgramCache]: Analyzing trace with hash 84514537, now seen corresponding path program 9 times [2023-09-01 12:27:45,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:45,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583944813] [2023-09-01 12:27:45,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:45,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:45,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:45,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583944813] [2023-09-01 12:27:45,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583944813] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:45,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239975446] [2023-09-01 12:27:45,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:27:45,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:45,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:45,199 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) [2023-09-01 12:27:45,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 12:27:45,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:27:45,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:45,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:27:45,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:45,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:45,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239975446] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:45,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:45,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-09-01 12:27:45,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809564905] [2023-09-01 12:27:45,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:45,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 12:27:45,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:45,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 12:27:45,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-09-01 12:27:45,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:27:45,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 83 transitions, 1012 flow. Second operand has 13 states, 13 states have (on average 171.15384615384616) internal successors, (2225), 13 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:45,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:45,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:27:45,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:45,763 INFO L130 PetriNetUnfolder]: 265/492 cut-off events. [2023-09-01 12:27:45,763 INFO L131 PetriNetUnfolder]: For 4464/4464 co-relation queries the response was YES. [2023-09-01 12:27:45,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3070 conditions, 492 events. 265/492 cut-off events. For 4464/4464 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2134 event pairs, 37 based on Foata normal form. 8/500 useless extension candidates. Maximal degree in co-relation 3028. Up to 159 conditions per place. [2023-09-01 12:27:45,768 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 91 selfloop transitions, 64 changer transitions 6/161 dead transitions. [2023-09-01 12:27:45,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 161 transitions, 1910 flow [2023-09-01 12:27:45,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 12:27:45,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 12:27:45,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3138 transitions. [2023-09-01 12:27:45,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231391585760518 [2023-09-01 12:27:45,773 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3138 transitions. [2023-09-01 12:27:45,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3138 transitions. [2023-09-01 12:27:45,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:45,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3138 transitions. [2023-09-01 12:27:45,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 174.33333333333334) internal successors, (3138), 18 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:45,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:45,787 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:45,787 INFO L175 Difference]: Start difference. First operand has 98 places, 83 transitions, 1012 flow. Second operand 18 states and 3138 transitions. [2023-09-01 12:27:45,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 161 transitions, 1910 flow [2023-09-01 12:27:45,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 161 transitions, 1767 flow, removed 45 selfloop flow, removed 8 redundant places. [2023-09-01 12:27:45,803 INFO L231 Difference]: Finished difference. Result has 111 places, 103 transitions, 1356 flow [2023-09-01 12:27:45,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1356, PETRI_PLACES=111, PETRI_TRANSITIONS=103} [2023-09-01 12:27:45,804 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 91 predicate places. [2023-09-01 12:27:45,804 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 103 transitions, 1356 flow [2023-09-01 12:27:45,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 171.15384615384616) internal successors, (2225), 13 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:45,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:45,805 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:45,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:46,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:46,011 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:46,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:46,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1635873767, now seen corresponding path program 10 times [2023-09-01 12:27:46,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:46,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237450967] [2023-09-01 12:27:46,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:46,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:46,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:46,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237450967] [2023-09-01 12:27:46,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237450967] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:46,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478519446] [2023-09-01 12:27:46,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:27:46,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:46,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:46,081 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) [2023-09-01 12:27:46,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 12:27:46,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:27:46,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:46,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:27:46,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:46,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:46,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478519446] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:46,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:46,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 12:27:46,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992720279] [2023-09-01 12:27:46,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:46,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:27:46,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:46,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:27:46,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:27:46,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:27:46,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 103 transitions, 1356 flow. Second operand has 12 states, 12 states have (on average 171.33333333333334) internal successors, (2056), 12 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:46,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:46,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:27:46,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:46,623 INFO L130 PetriNetUnfolder]: 316/591 cut-off events. [2023-09-01 12:27:46,623 INFO L131 PetriNetUnfolder]: For 6497/6497 co-relation queries the response was YES. [2023-09-01 12:27:46,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3908 conditions, 591 events. 316/591 cut-off events. For 6497/6497 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2656 event pairs, 19 based on Foata normal form. 18/609 useless extension candidates. Maximal degree in co-relation 3866. Up to 303 conditions per place. [2023-09-01 12:27:46,630 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 119 selfloop transitions, 50 changer transitions 0/169 dead transitions. [2023-09-01 12:27:46,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 169 transitions, 2245 flow [2023-09-01 12:27:46,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 12:27:46,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 12:27:46,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2459 transitions. [2023-09-01 12:27:46,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263176144244105 [2023-09-01 12:27:46,633 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2459 transitions. [2023-09-01 12:27:46,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2459 transitions. [2023-09-01 12:27:46,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:46,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2459 transitions. [2023-09-01 12:27:46,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 175.64285714285714) internal successors, (2459), 14 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:46,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:46,642 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:46,642 INFO L175 Difference]: Start difference. First operand has 111 places, 103 transitions, 1356 flow. Second operand 14 states and 2459 transitions. [2023-09-01 12:27:46,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 169 transitions, 2245 flow [2023-09-01 12:27:46,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 169 transitions, 2079 flow, removed 32 selfloop flow, removed 8 redundant places. [2023-09-01 12:27:46,664 INFO L231 Difference]: Finished difference. Result has 120 places, 117 transitions, 1586 flow [2023-09-01 12:27:46,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1586, PETRI_PLACES=120, PETRI_TRANSITIONS=117} [2023-09-01 12:27:46,665 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 100 predicate places. [2023-09-01 12:27:46,665 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 117 transitions, 1586 flow [2023-09-01 12:27:46,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.33333333333334) internal successors, (2056), 12 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:46,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:46,666 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:46,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:46,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:46,872 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:46,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:46,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1629563245, now seen corresponding path program 11 times [2023-09-01 12:27:46,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:46,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743684830] [2023-09-01 12:27:46,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:46,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:46,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:46,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743684830] [2023-09-01 12:27:46,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743684830] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:46,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607936024] [2023-09-01 12:27:46,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:27:46,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:46,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:46,937 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) [2023-09-01 12:27:46,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 12:27:47,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 12:27:47,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:47,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:27:47,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:47,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:47,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:47,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607936024] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:47,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:47,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 12:27:47,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673366629] [2023-09-01 12:27:47,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:47,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:27:47,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:47,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:27:47,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:27:47,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:27:47,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 117 transitions, 1586 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:47,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:47,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:27:47,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:47,520 INFO L130 PetriNetUnfolder]: 391/758 cut-off events. [2023-09-01 12:27:47,521 INFO L131 PetriNetUnfolder]: For 10396/10396 co-relation queries the response was YES. [2023-09-01 12:27:47,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5484 conditions, 758 events. 391/758 cut-off events. For 10396/10396 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3764 event pairs, 81 based on Foata normal form. 8/766 useless extension candidates. Maximal degree in co-relation 5438. Up to 329 conditions per place. [2023-09-01 12:27:47,530 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 116 selfloop transitions, 62 changer transitions 0/178 dead transitions. [2023-09-01 12:27:47,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 178 transitions, 2519 flow [2023-09-01 12:27:47,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 12:27:47,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 12:27:47,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2288 transitions. [2023-09-01 12:27:47,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42718446601941745 [2023-09-01 12:27:47,533 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2288 transitions. [2023-09-01 12:27:47,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2288 transitions. [2023-09-01 12:27:47,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:47,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2288 transitions. [2023-09-01 12:27:47,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 176.0) internal successors, (2288), 13 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:47,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:47,542 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:47,543 INFO L175 Difference]: Start difference. First operand has 120 places, 117 transitions, 1586 flow. Second operand 13 states and 2288 transitions. [2023-09-01 12:27:47,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 178 transitions, 2519 flow [2023-09-01 12:27:47,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 178 transitions, 2287 flow, removed 96 selfloop flow, removed 5 redundant places. [2023-09-01 12:27:47,575 INFO L231 Difference]: Finished difference. Result has 133 places, 131 transitions, 1857 flow [2023-09-01 12:27:47,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1857, PETRI_PLACES=133, PETRI_TRANSITIONS=131} [2023-09-01 12:27:47,575 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 113 predicate places. [2023-09-01 12:27:47,575 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 131 transitions, 1857 flow [2023-09-01 12:27:47,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:47,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:47,576 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:47,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:47,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:47,782 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:47,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:47,782 INFO L85 PathProgramCache]: Analyzing trace with hash 608008723, now seen corresponding path program 12 times [2023-09-01 12:27:47,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:47,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961343037] [2023-09-01 12:27:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:47,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:47,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:47,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961343037] [2023-09-01 12:27:47,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961343037] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:47,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528961956] [2023-09-01 12:27:47,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:27:47,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:47,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:47,846 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) [2023-09-01 12:27:47,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 12:27:47,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 12:27:47,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:47,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:27:47,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:47,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:48,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528961956] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:48,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:48,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 12:27:48,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216358036] [2023-09-01 12:27:48,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:48,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:27:48,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:48,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:27:48,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:27:48,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:27:48,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 131 transitions, 1857 flow. Second operand has 12 states, 12 states have (on average 171.16666666666666) internal successors, (2054), 12 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:48,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:48,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:27:48,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:48,468 INFO L130 PetriNetUnfolder]: 387/752 cut-off events. [2023-09-01 12:27:48,469 INFO L131 PetriNetUnfolder]: For 10139/10139 co-relation queries the response was YES. [2023-09-01 12:27:48,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5345 conditions, 752 events. 387/752 cut-off events. For 10139/10139 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3731 event pairs, 57 based on Foata normal form. 16/764 useless extension candidates. Maximal degree in co-relation 5292. Up to 243 conditions per place. [2023-09-01 12:27:48,478 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 114 selfloop transitions, 71 changer transitions 2/187 dead transitions. [2023-09-01 12:27:48,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 187 transitions, 2623 flow [2023-09-01 12:27:48,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 12:27:48,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 12:27:48,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3145 transitions. [2023-09-01 12:27:48,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42408306364617043 [2023-09-01 12:27:48,482 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3145 transitions. [2023-09-01 12:27:48,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3145 transitions. [2023-09-01 12:27:48,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:48,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3145 transitions. [2023-09-01 12:27:48,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 174.72222222222223) internal successors, (3145), 18 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:48,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:48,520 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:48,520 INFO L175 Difference]: Start difference. First operand has 133 places, 131 transitions, 1857 flow. Second operand 18 states and 3145 transitions. [2023-09-01 12:27:48,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 187 transitions, 2623 flow [2023-09-01 12:27:48,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 187 transitions, 2501 flow, removed 48 selfloop flow, removed 4 redundant places. [2023-09-01 12:27:48,547 INFO L231 Difference]: Finished difference. Result has 148 places, 131 transitions, 1976 flow [2023-09-01 12:27:48,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=1717, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1976, PETRI_PLACES=148, PETRI_TRANSITIONS=131} [2023-09-01 12:27:48,547 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 128 predicate places. [2023-09-01 12:27:48,548 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 131 transitions, 1976 flow [2023-09-01 12:27:48,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.16666666666666) internal successors, (2054), 12 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:48,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:48,548 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:48,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-09-01 12:27:48,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:48,754 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:48,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:48,755 INFO L85 PathProgramCache]: Analyzing trace with hash -844138731, now seen corresponding path program 13 times [2023-09-01 12:27:48,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:48,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344364609] [2023-09-01 12:27:48,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:48,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:48,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:48,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344364609] [2023-09-01 12:27:48,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344364609] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:48,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082885050] [2023-09-01 12:27:48,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:27:48,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:48,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:48,821 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) [2023-09-01 12:27:48,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 12:27:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:48,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:27:48,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:48,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:48,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082885050] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:48,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:48,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 12:27:48,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752353324] [2023-09-01 12:27:48,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:48,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:27:48,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:48,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:27:48,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:27:49,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:27:49,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 131 transitions, 1976 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:49,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:49,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:27:49,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:49,405 INFO L130 PetriNetUnfolder]: 388/747 cut-off events. [2023-09-01 12:27:49,405 INFO L131 PetriNetUnfolder]: For 10712/10712 co-relation queries the response was YES. [2023-09-01 12:27:49,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5438 conditions, 747 events. 388/747 cut-off events. For 10712/10712 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3679 event pairs, 13 based on Foata normal form. 6/749 useless extension candidates. Maximal degree in co-relation 5382. Up to 203 conditions per place. [2023-09-01 12:27:49,415 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 123 selfloop transitions, 86 changer transitions 2/211 dead transitions. [2023-09-01 12:27:49,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 211 transitions, 3237 flow [2023-09-01 12:27:49,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 12:27:49,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 12:27:49,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3305 transitions. [2023-09-01 12:27:49,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222023505365355 [2023-09-01 12:27:49,421 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3305 transitions. [2023-09-01 12:27:49,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3305 transitions. [2023-09-01 12:27:49,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:49,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3305 transitions. [2023-09-01 12:27:49,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 173.94736842105263) internal successors, (3305), 19 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:49,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 412.0) internal successors, (8240), 20 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:49,434 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 412.0) internal successors, (8240), 20 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:49,435 INFO L175 Difference]: Start difference. First operand has 148 places, 131 transitions, 1976 flow. Second operand 19 states and 3305 transitions. [2023-09-01 12:27:49,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 211 transitions, 3237 flow [2023-09-01 12:27:49,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 211 transitions, 2965 flow, removed 91 selfloop flow, removed 10 redundant places. [2023-09-01 12:27:49,474 INFO L231 Difference]: Finished difference. Result has 157 places, 157 transitions, 2334 flow [2023-09-01 12:27:49,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2334, PETRI_PLACES=157, PETRI_TRANSITIONS=157} [2023-09-01 12:27:49,474 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 137 predicate places. [2023-09-01 12:27:49,475 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 157 transitions, 2334 flow [2023-09-01 12:27:49,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:49,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:49,476 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:49,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:49,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:49,681 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:49,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:49,682 INFO L85 PathProgramCache]: Analyzing trace with hash -205590883, now seen corresponding path program 14 times [2023-09-01 12:27:49,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:49,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690543047] [2023-09-01 12:27:49,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:49,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:49,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:49,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690543047] [2023-09-01 12:27:49,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690543047] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:49,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120808332] [2023-09-01 12:27:49,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:27:49,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:49,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:49,752 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) [2023-09-01 12:27:49,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 12:27:49,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:27:49,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:49,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:27:49,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:49,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:49,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120808332] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:49,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:49,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-09-01 12:27:49,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657351360] [2023-09-01 12:27:49,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:49,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 12:27:49,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:49,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 12:27:49,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-09-01 12:27:49,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:27:49,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 157 transitions, 2334 flow. Second operand has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:49,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:49,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:27:49,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:50,361 INFO L130 PetriNetUnfolder]: 564/1111 cut-off events. [2023-09-01 12:27:50,361 INFO L131 PetriNetUnfolder]: For 18104/18104 co-relation queries the response was YES. [2023-09-01 12:27:50,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8133 conditions, 1111 events. 564/1111 cut-off events. For 18104/18104 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6245 event pairs, 45 based on Foata normal form. 18/1121 useless extension candidates. Maximal degree in co-relation 8074. Up to 406 conditions per place. [2023-09-01 12:27:50,374 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 152 selfloop transitions, 117 changer transitions 0/269 dead transitions. [2023-09-01 12:27:50,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 269 transitions, 4223 flow [2023-09-01 12:27:50,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 12:27:50,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 12:27:50,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2637 transitions. [2023-09-01 12:27:50,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266990291262136 [2023-09-01 12:27:50,377 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2637 transitions. [2023-09-01 12:27:50,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2637 transitions. [2023-09-01 12:27:50,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:50,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2637 transitions. [2023-09-01 12:27:50,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 175.8) internal successors, (2637), 15 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:50,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:50,385 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:50,385 INFO L175 Difference]: Start difference. First operand has 157 places, 157 transitions, 2334 flow. Second operand 15 states and 2637 transitions. [2023-09-01 12:27:50,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 269 transitions, 4223 flow [2023-09-01 12:27:50,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 269 transitions, 3910 flow, removed 129 selfloop flow, removed 8 redundant places. [2023-09-01 12:27:50,449 INFO L231 Difference]: Finished difference. Result has 168 places, 203 transitions, 3262 flow [2023-09-01 12:27:50,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=2101, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3262, PETRI_PLACES=168, PETRI_TRANSITIONS=203} [2023-09-01 12:27:50,450 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 148 predicate places. [2023-09-01 12:27:50,450 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 203 transitions, 3262 flow [2023-09-01 12:27:50,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:50,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:50,451 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:50,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:50,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-09-01 12:27:50,656 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:50,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:50,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1054951077, now seen corresponding path program 15 times [2023-09-01 12:27:50,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:50,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814690716] [2023-09-01 12:27:50,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:50,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:50,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:50,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814690716] [2023-09-01 12:27:50,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814690716] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:50,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856729315] [2023-09-01 12:27:50,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:27:50,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:50,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:50,724 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:50,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 12:27:50,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:27:50,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:50,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:27:50,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:50,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:27:50,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856729315] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:50,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:50,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-09-01 12:27:50,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515138915] [2023-09-01 12:27:50,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:50,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 12:27:50,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:50,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 12:27:50,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-09-01 12:27:50,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:27:50,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 203 transitions, 3262 flow. Second operand has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:50,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:50,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:27:50,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:51,411 INFO L130 PetriNetUnfolder]: 566/1133 cut-off events. [2023-09-01 12:27:51,411 INFO L131 PetriNetUnfolder]: For 19342/19342 co-relation queries the response was YES. [2023-09-01 12:27:51,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8557 conditions, 1133 events. 566/1133 cut-off events. For 19342/19342 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6498 event pairs, 23 based on Foata normal form. 6/1139 useless extension candidates. Maximal degree in co-relation 8496. Up to 342 conditions per place. [2023-09-01 12:27:51,422 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 148 selfloop transitions, 127 changer transitions 2/277 dead transitions. [2023-09-01 12:27:51,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 277 transitions, 4574 flow [2023-09-01 12:27:51,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 12:27:51,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 12:27:51,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3657 transitions. [2023-09-01 12:27:51,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226768377253814 [2023-09-01 12:27:51,426 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3657 transitions. [2023-09-01 12:27:51,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3657 transitions. [2023-09-01 12:27:51,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:51,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3657 transitions. [2023-09-01 12:27:51,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 174.14285714285714) internal successors, (3657), 21 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:51,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 412.0) internal successors, (9064), 22 states have internal predecessors, (9064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:51,438 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 412.0) internal successors, (9064), 22 states have internal predecessors, (9064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:51,438 INFO L175 Difference]: Start difference. First operand has 168 places, 203 transitions, 3262 flow. Second operand 21 states and 3657 transitions. [2023-09-01 12:27:51,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 277 transitions, 4574 flow [2023-09-01 12:27:51,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 277 transitions, 4415 flow, removed 66 selfloop flow, removed 3 redundant places. [2023-09-01 12:27:51,507 INFO L231 Difference]: Finished difference. Result has 188 places, 211 transitions, 3597 flow [2023-09-01 12:27:51,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=3043, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3597, PETRI_PLACES=188, PETRI_TRANSITIONS=211} [2023-09-01 12:27:51,508 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 168 predicate places. [2023-09-01 12:27:51,508 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 211 transitions, 3597 flow [2023-09-01 12:27:51,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:51,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:51,509 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:51,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:51,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-09-01 12:27:51,715 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:51,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:51,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1615313315, now seen corresponding path program 16 times [2023-09-01 12:27:51,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:51,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28443550] [2023-09-01 12:27:51,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:51,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:51,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:51,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:51,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:51,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28443550] [2023-09-01 12:27:51,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28443550] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:51,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847193611] [2023-09-01 12:27:51,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:27:51,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:51,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:51,789 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:51,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 12:27:51,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:27:51,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:51,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:27:51,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:51,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:51,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847193611] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:51,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:51,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-09-01 12:27:51,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738859919] [2023-09-01 12:27:51,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:51,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 12:27:51,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:51,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 12:27:51,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-09-01 12:27:52,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:27:52,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 211 transitions, 3597 flow. Second operand has 15 states, 15 states have (on average 170.73333333333332) internal successors, (2561), 15 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:52,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:52,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:27:52,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:52,532 INFO L130 PetriNetUnfolder]: 629/1260 cut-off events. [2023-09-01 12:27:52,532 INFO L131 PetriNetUnfolder]: For 23382/23382 co-relation queries the response was YES. [2023-09-01 12:27:52,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9976 conditions, 1260 events. 629/1260 cut-off events. For 23382/23382 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7379 event pairs, 27 based on Foata normal form. 6/1266 useless extension candidates. Maximal degree in co-relation 9912. Up to 359 conditions per place. [2023-09-01 12:27:52,549 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 147 selfloop transitions, 141 changer transitions 4/292 dead transitions. [2023-09-01 12:27:52,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 292 transitions, 5271 flow [2023-09-01 12:27:52,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 12:27:52,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 12:27:52,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3478 transitions. [2023-09-01 12:27:52,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4220873786407767 [2023-09-01 12:27:52,560 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3478 transitions. [2023-09-01 12:27:52,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3478 transitions. [2023-09-01 12:27:52,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:52,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3478 transitions. [2023-09-01 12:27:52,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 173.9) internal successors, (3478), 20 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:52,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:52,576 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:52,577 INFO L175 Difference]: Start difference. First operand has 188 places, 211 transitions, 3597 flow. Second operand 20 states and 3478 transitions. [2023-09-01 12:27:52,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 292 transitions, 5271 flow [2023-09-01 12:27:52,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 292 transitions, 4963 flow, removed 126 selfloop flow, removed 7 redundant places. [2023-09-01 12:27:52,667 INFO L231 Difference]: Finished difference. Result has 205 places, 234 transitions, 4307 flow [2023-09-01 12:27:52,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=3383, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4307, PETRI_PLACES=205, PETRI_TRANSITIONS=234} [2023-09-01 12:27:52,668 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 185 predicate places. [2023-09-01 12:27:52,668 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 234 transitions, 4307 flow [2023-09-01 12:27:52,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.73333333333332) internal successors, (2561), 15 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:52,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:52,669 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:52,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-09-01 12:27:52,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-09-01 12:27:52,874 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:52,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:52,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1858772581, now seen corresponding path program 17 times [2023-09-01 12:27:52,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:52,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890444915] [2023-09-01 12:27:52,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:52,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:52,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:52,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890444915] [2023-09-01 12:27:52,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890444915] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:52,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812515986] [2023-09-01 12:27:52,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:27:52,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:52,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:52,964 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:52,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 12:27:53,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:27:53,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:53,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:27:53,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:53,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:53,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812515986] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:53,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:53,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-09-01 12:27:53,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674342812] [2023-09-01 12:27:53,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:53,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 12:27:53,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:53,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 12:27:53,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-09-01 12:27:53,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:27:53,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 234 transitions, 4307 flow. Second operand has 15 states, 15 states have (on average 171.06666666666666) internal successors, (2566), 15 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:53,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:53,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:27:53,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:53,736 INFO L130 PetriNetUnfolder]: 658/1339 cut-off events. [2023-09-01 12:27:53,736 INFO L131 PetriNetUnfolder]: For 29848/29848 co-relation queries the response was YES. [2023-09-01 12:27:53,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11064 conditions, 1339 events. 658/1339 cut-off events. For 29848/29848 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8174 event pairs, 27 based on Foata normal form. 24/1363 useless extension candidates. Maximal degree in co-relation 10994. Up to 595 conditions per place. [2023-09-01 12:27:53,751 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 212 selfloop transitions, 105 changer transitions 7/324 dead transitions. [2023-09-01 12:27:53,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 324 transitions, 6036 flow [2023-09-01 12:27:53,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 12:27:53,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 12:27:53,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4009 transitions. [2023-09-01 12:27:53,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230688054031237 [2023-09-01 12:27:53,755 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4009 transitions. [2023-09-01 12:27:53,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4009 transitions. [2023-09-01 12:27:53,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:53,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4009 transitions. [2023-09-01 12:27:53,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 174.30434782608697) internal successors, (4009), 23 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:53,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:53,766 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:53,766 INFO L175 Difference]: Start difference. First operand has 205 places, 234 transitions, 4307 flow. Second operand 23 states and 4009 transitions. [2023-09-01 12:27:53,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 324 transitions, 6036 flow [2023-09-01 12:27:53,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 324 transitions, 5854 flow, removed 53 selfloop flow, removed 7 redundant places. [2023-09-01 12:27:53,866 INFO L231 Difference]: Finished difference. Result has 226 places, 251 transitions, 4920 flow [2023-09-01 12:27:53,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=4104, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4920, PETRI_PLACES=226, PETRI_TRANSITIONS=251} [2023-09-01 12:27:53,866 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 206 predicate places. [2023-09-01 12:27:53,866 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 251 transitions, 4920 flow [2023-09-01 12:27:53,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 171.06666666666666) internal successors, (2566), 15 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:53,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:53,867 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:53,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:54,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:54,071 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:54,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:54,072 INFO L85 PathProgramCache]: Analyzing trace with hash -2139611511, now seen corresponding path program 18 times [2023-09-01 12:27:54,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:54,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258816416] [2023-09-01 12:27:54,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:54,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:54,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:54,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:54,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258816416] [2023-09-01 12:27:54,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258816416] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:54,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590723087] [2023-09-01 12:27:54,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:27:54,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:54,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:54,139 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:54,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 12:27:54,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 12:27:54,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:54,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:27:54,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:54,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:54,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590723087] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:54,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:54,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-09-01 12:27:54,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766928331] [2023-09-01 12:27:54,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:54,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 12:27:54,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:54,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 12:27:54,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-09-01 12:27:54,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:27:54,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 251 transitions, 4920 flow. Second operand has 15 states, 15 states have (on average 170.73333333333332) internal successors, (2561), 15 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:54,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:54,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:27:54,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:54,978 INFO L130 PetriNetUnfolder]: 776/1587 cut-off events. [2023-09-01 12:27:54,978 INFO L131 PetriNetUnfolder]: For 49092/49092 co-relation queries the response was YES. [2023-09-01 12:27:54,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14335 conditions, 1587 events. 776/1587 cut-off events. For 49092/49092 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10130 event pairs, 116 based on Foata normal form. 16/1603 useless extension candidates. Maximal degree in co-relation 14257. Up to 472 conditions per place. [2023-09-01 12:27:54,996 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 227 selfloop transitions, 143 changer transitions 4/374 dead transitions. [2023-09-01 12:27:54,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 374 transitions, 7969 flow [2023-09-01 12:27:54,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 12:27:54,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 12:27:55,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4005 transitions. [2023-09-01 12:27:55,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226466863655551 [2023-09-01 12:27:55,029 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4005 transitions. [2023-09-01 12:27:55,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4005 transitions. [2023-09-01 12:27:55,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:55,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4005 transitions. [2023-09-01 12:27:55,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 174.1304347826087) internal successors, (4005), 23 states have internal predecessors, (4005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:55,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:55,046 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:55,047 INFO L175 Difference]: Start difference. First operand has 226 places, 251 transitions, 4920 flow. Second operand 23 states and 4005 transitions. [2023-09-01 12:27:55,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 374 transitions, 7969 flow [2023-09-01 12:27:55,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 374 transitions, 6986 flow, removed 398 selfloop flow, removed 11 redundant places. [2023-09-01 12:27:55,255 INFO L231 Difference]: Finished difference. Result has 242 places, 305 transitions, 6227 flow [2023-09-01 12:27:55,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=4389, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=6227, PETRI_PLACES=242, PETRI_TRANSITIONS=305} [2023-09-01 12:27:55,258 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 222 predicate places. [2023-09-01 12:27:55,258 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 305 transitions, 6227 flow [2023-09-01 12:27:55,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.73333333333332) internal successors, (2561), 15 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:55,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:55,259 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:55,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:55,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 12:27:55,465 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:55,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:55,465 INFO L85 PathProgramCache]: Analyzing trace with hash 988708695, now seen corresponding path program 19 times [2023-09-01 12:27:55,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:55,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105802526] [2023-09-01 12:27:55,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:55,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:55,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:55,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105802526] [2023-09-01 12:27:55,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105802526] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:55,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303070065] [2023-09-01 12:27:55,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:27:55,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:55,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:55,544 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:55,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 12:27:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:55,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:27:55,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:55,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:55,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303070065] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:55,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:55,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 12:27:55,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166219520] [2023-09-01 12:27:55,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:55,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:27:55,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:55,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:27:55,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:27:55,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:27:55,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 305 transitions, 6227 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:55,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:55,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:27:55,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:56,378 INFO L130 PetriNetUnfolder]: 862/1779 cut-off events. [2023-09-01 12:27:56,378 INFO L131 PetriNetUnfolder]: For 62137/62137 co-relation queries the response was YES. [2023-09-01 12:27:56,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15867 conditions, 1779 events. 862/1779 cut-off events. For 62137/62137 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 11790 event pairs, 195 based on Foata normal form. 40/1819 useless extension candidates. Maximal degree in co-relation 15783. Up to 1019 conditions per place. [2023-09-01 12:27:56,403 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 263 selfloop transitions, 121 changer transitions 0/384 dead transitions. [2023-09-01 12:27:56,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 384 transitions, 8294 flow [2023-09-01 12:27:56,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 12:27:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 12:27:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2286 transitions. [2023-09-01 12:27:56,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268110530246453 [2023-09-01 12:27:56,406 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2286 transitions. [2023-09-01 12:27:56,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2286 transitions. [2023-09-01 12:27:56,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:56,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2286 transitions. [2023-09-01 12:27:56,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 175.84615384615384) internal successors, (2286), 13 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:56,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:56,413 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:56,413 INFO L175 Difference]: Start difference. First operand has 242 places, 305 transitions, 6227 flow. Second operand 13 states and 2286 transitions. [2023-09-01 12:27:56,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 384 transitions, 8294 flow [2023-09-01 12:27:56,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 384 transitions, 7514 flow, removed 368 selfloop flow, removed 8 redundant places. [2023-09-01 12:27:56,732 INFO L231 Difference]: Finished difference. Result has 248 places, 321 transitions, 6310 flow [2023-09-01 12:27:56,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=5296, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6310, PETRI_PLACES=248, PETRI_TRANSITIONS=321} [2023-09-01 12:27:56,732 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 228 predicate places. [2023-09-01 12:27:56,732 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 321 transitions, 6310 flow [2023-09-01 12:27:56,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:56,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:56,733 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:56,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:56,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:56,933 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:56,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:56,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1226313027, now seen corresponding path program 20 times [2023-09-01 12:27:56,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:56,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244070840] [2023-09-01 12:27:56,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:56,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:56,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:56,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244070840] [2023-09-01 12:27:56,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244070840] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:56,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944812011] [2023-09-01 12:27:56,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:27:56,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:56,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:56,999 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:57,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 12:27:57,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:27:57,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:57,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:27:57,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:57,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:57,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944812011] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:57,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:57,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-09-01 12:27:57,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979628697] [2023-09-01 12:27:57,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:57,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 12:27:57,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:57,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 12:27:57,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-09-01 12:27:57,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:27:57,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 321 transitions, 6310 flow. Second operand has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:57,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:57,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:27:57,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:57,914 INFO L130 PetriNetUnfolder]: 928/1905 cut-off events. [2023-09-01 12:27:57,915 INFO L131 PetriNetUnfolder]: For 55076/55076 co-relation queries the response was YES. [2023-09-01 12:27:57,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16385 conditions, 1905 events. 928/1905 cut-off events. For 55076/55076 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 12743 event pairs, 156 based on Foata normal form. 6/1911 useless extension candidates. Maximal degree in co-relation 16297. Up to 640 conditions per place. [2023-09-01 12:27:57,940 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 245 selfloop transitions, 144 changer transitions 2/391 dead transitions. [2023-09-01 12:27:57,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 391 transitions, 7993 flow [2023-09-01 12:27:57,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 12:27:57,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 12:27:57,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2960 transitions. [2023-09-01 12:27:57,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.422615648201028 [2023-09-01 12:27:57,943 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2960 transitions. [2023-09-01 12:27:57,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2960 transitions. [2023-09-01 12:27:57,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:57,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2960 transitions. [2023-09-01 12:27:57,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 174.11764705882354) internal successors, (2960), 17 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:57,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 412.0) internal successors, (7416), 18 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:57,952 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 412.0) internal successors, (7416), 18 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:57,952 INFO L175 Difference]: Start difference. First operand has 248 places, 321 transitions, 6310 flow. Second operand 17 states and 2960 transitions. [2023-09-01 12:27:57,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 391 transitions, 7993 flow [2023-09-01 12:27:58,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 391 transitions, 7571 flow, removed 179 selfloop flow, removed 6 redundant places. [2023-09-01 12:27:58,200 INFO L231 Difference]: Finished difference. Result has 263 places, 341 transitions, 6828 flow [2023-09-01 12:27:58,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=5926, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6828, PETRI_PLACES=263, PETRI_TRANSITIONS=341} [2023-09-01 12:27:58,201 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 243 predicate places. [2023-09-01 12:27:58,201 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 341 transitions, 6828 flow [2023-09-01 12:27:58,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:58,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:58,201 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:58,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-09-01 12:27:58,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-09-01 12:27:58,402 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:58,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:58,402 INFO L85 PathProgramCache]: Analyzing trace with hash -915768439, now seen corresponding path program 21 times [2023-09-01 12:27:58,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:58,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263050807] [2023-09-01 12:27:58,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:58,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:58,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:58,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:58,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263050807] [2023-09-01 12:27:58,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263050807] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:58,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026727037] [2023-09-01 12:27:58,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:27:58,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:58,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:58,484 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:58,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 12:27:58,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:27:58,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:58,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:27:58,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:58,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:58,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026727037] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:58,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:58,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-09-01 12:27:58,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435216762] [2023-09-01 12:27:58,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:58,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:27:58,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:58,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:27:58,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-09-01 12:27:58,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:27:58,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 341 transitions, 6828 flow. Second operand has 11 states, 11 states have (on average 171.0909090909091) internal successors, (1882), 11 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:58,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:58,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:27:58,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:27:59,150 INFO L130 PetriNetUnfolder]: 927/1906 cut-off events. [2023-09-01 12:27:59,151 INFO L131 PetriNetUnfolder]: For 54564/54564 co-relation queries the response was YES. [2023-09-01 12:27:59,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16583 conditions, 1906 events. 927/1906 cut-off events. For 54564/54564 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 12775 event pairs, 173 based on Foata normal form. 2/1908 useless extension candidates. Maximal degree in co-relation 16491. Up to 1010 conditions per place. [2023-09-01 12:27:59,176 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 234 selfloop transitions, 132 changer transitions 5/371 dead transitions. [2023-09-01 12:27:59,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 371 transitions, 7954 flow [2023-09-01 12:27:59,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:27:59,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:27:59,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1912 transitions. [2023-09-01 12:27:59,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42188879082082964 [2023-09-01 12:27:59,179 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1912 transitions. [2023-09-01 12:27:59,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1912 transitions. [2023-09-01 12:27:59,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:27:59,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1912 transitions. [2023-09-01 12:27:59,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 173.8181818181818) internal successors, (1912), 11 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:59,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:59,185 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:59,185 INFO L175 Difference]: Start difference. First operand has 263 places, 341 transitions, 6828 flow. Second operand 11 states and 1912 transitions. [2023-09-01 12:27:59,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 371 transitions, 7954 flow [2023-09-01 12:27:59,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 371 transitions, 7896 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-09-01 12:27:59,453 INFO L231 Difference]: Finished difference. Result has 268 places, 341 transitions, 7082 flow [2023-09-01 12:27:59,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=6770, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7082, PETRI_PLACES=268, PETRI_TRANSITIONS=341} [2023-09-01 12:27:59,453 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 248 predicate places. [2023-09-01 12:27:59,453 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 341 transitions, 7082 flow [2023-09-01 12:27:59,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 171.0909090909091) internal successors, (1882), 11 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:59,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:27:59,454 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:27:59,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-09-01 12:27:59,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:59,659 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:27:59,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:27:59,660 INFO L85 PathProgramCache]: Analyzing trace with hash 222682459, now seen corresponding path program 22 times [2023-09-01 12:27:59,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:27:59,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10279023] [2023-09-01 12:27:59,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:27:59,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:27:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:27:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:59,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:27:59,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10279023] [2023-09-01 12:27:59,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10279023] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:27:59,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764907312] [2023-09-01 12:27:59,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:27:59,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:27:59,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:27:59,741 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:27:59,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 12:27:59,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:27:59,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:27:59,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:27:59,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:27:59,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:59,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:27:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:27:59,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764907312] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:27:59,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:27:59,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-09-01 12:27:59,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749804024] [2023-09-01 12:27:59,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:27:59,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:27:59,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:27:59,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:27:59,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-09-01 12:27:59,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:27:59,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 341 transitions, 7082 flow. Second operand has 11 states, 11 states have (on average 171.0909090909091) internal successors, (1882), 11 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:27:59,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:27:59,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:27:59,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:00,650 INFO L130 PetriNetUnfolder]: 943/1930 cut-off events. [2023-09-01 12:28:00,650 INFO L131 PetriNetUnfolder]: For 57665/57665 co-relation queries the response was YES. [2023-09-01 12:28:00,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17176 conditions, 1930 events. 943/1930 cut-off events. For 57665/57665 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 12878 event pairs, 58 based on Foata normal form. 10/1940 useless extension candidates. Maximal degree in co-relation 17081. Up to 1497 conditions per place. [2023-09-01 12:28:00,677 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 285 selfloop transitions, 88 changer transitions 0/373 dead transitions. [2023-09-01 12:28:00,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 373 transitions, 8278 flow [2023-09-01 12:28:00,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:28:00,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:28:00,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1230 transitions. [2023-09-01 12:28:00,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264909847434119 [2023-09-01 12:28:00,680 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1230 transitions. [2023-09-01 12:28:00,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1230 transitions. [2023-09-01 12:28:00,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:00,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1230 transitions. [2023-09-01 12:28:00,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 175.71428571428572) internal successors, (1230), 7 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:00,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:00,689 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 412.0) internal successors, (3296), 8 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:00,689 INFO L175 Difference]: Start difference. First operand has 268 places, 341 transitions, 7082 flow. Second operand 7 states and 1230 transitions. [2023-09-01 12:28:00,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 373 transitions, 8278 flow [2023-09-01 12:28:00,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 373 transitions, 8215 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-09-01 12:28:00,940 INFO L231 Difference]: Finished difference. Result has 270 places, 348 transitions, 7341 flow [2023-09-01 12:28:00,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=7019, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7341, PETRI_PLACES=270, PETRI_TRANSITIONS=348} [2023-09-01 12:28:00,940 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 250 predicate places. [2023-09-01 12:28:00,941 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 348 transitions, 7341 flow [2023-09-01 12:28:00,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 171.0909090909091) internal successors, (1882), 11 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:00,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:00,941 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:00,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:01,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:01,147 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:01,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:01,147 INFO L85 PathProgramCache]: Analyzing trace with hash -127101819, now seen corresponding path program 23 times [2023-09-01 12:28:01,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:01,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759919615] [2023-09-01 12:28:01,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:01,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:01,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:01,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759919615] [2023-09-01 12:28:01,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759919615] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:01,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587501661] [2023-09-01 12:28:01,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:28:01,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:01,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:01,217 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:01,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 12:28:01,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 12:28:01,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:01,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:28:01,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:01,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:01,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:01,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587501661] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:01,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:01,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-09-01 12:28:01,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878371306] [2023-09-01 12:28:01,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:01,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 12:28:01,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:01,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 12:28:01,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-09-01 12:28:01,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:28:01,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 348 transitions, 7341 flow. Second operand has 13 states, 13 states have (on average 171.07692307692307) internal successors, (2224), 13 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:01,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:01,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:28:01,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:02,149 INFO L130 PetriNetUnfolder]: 978/2007 cut-off events. [2023-09-01 12:28:02,149 INFO L131 PetriNetUnfolder]: For 61128/61128 co-relation queries the response was YES. [2023-09-01 12:28:02,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18001 conditions, 2007 events. 978/2007 cut-off events. For 61128/61128 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 13589 event pairs, 34 based on Foata normal form. 16/2023 useless extension candidates. Maximal degree in co-relation 17905. Up to 945 conditions per place. [2023-09-01 12:28:02,168 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 289 selfloop transitions, 144 changer transitions 1/434 dead transitions. [2023-09-01 12:28:02,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 434 transitions, 9253 flow [2023-09-01 12:28:02,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 12:28:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 12:28:02,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3829 transitions. [2023-09-01 12:28:02,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224404236540159 [2023-09-01 12:28:02,171 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3829 transitions. [2023-09-01 12:28:02,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3829 transitions. [2023-09-01 12:28:02,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:02,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3829 transitions. [2023-09-01 12:28:02,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 174.04545454545453) internal successors, (3829), 22 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:02,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:02,183 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:02,183 INFO L175 Difference]: Start difference. First operand has 270 places, 348 transitions, 7341 flow. Second operand 22 states and 3829 transitions. [2023-09-01 12:28:02,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 434 transitions, 9253 flow [2023-09-01 12:28:02,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 434 transitions, 9061 flow, removed 20 selfloop flow, removed 4 redundant places. [2023-09-01 12:28:02,462 INFO L231 Difference]: Finished difference. Result has 296 places, 372 transitions, 8028 flow [2023-09-01 12:28:02,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=7087, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8028, PETRI_PLACES=296, PETRI_TRANSITIONS=372} [2023-09-01 12:28:02,463 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 276 predicate places. [2023-09-01 12:28:02,463 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 372 transitions, 8028 flow [2023-09-01 12:28:02,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 171.07692307692307) internal successors, (2224), 13 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:02,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:02,463 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:02,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-09-01 12:28:02,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:02,669 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:02,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:02,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1017412653, now seen corresponding path program 24 times [2023-09-01 12:28:02,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:02,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211740238] [2023-09-01 12:28:02,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:02,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:02,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:02,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211740238] [2023-09-01 12:28:02,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211740238] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:02,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124126820] [2023-09-01 12:28:02,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:28:02,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:02,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:02,732 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:02,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 12:28:02,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 12:28:02,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:02,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:28:02,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:02,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:28:02,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124126820] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:02,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:02,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-09-01 12:28:02,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904503920] [2023-09-01 12:28:02,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:02,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 12:28:02,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:02,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 12:28:02,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-09-01 12:28:02,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:28:02,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 372 transitions, 8028 flow. Second operand has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:02,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:02,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:28:02,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:03,606 INFO L130 PetriNetUnfolder]: 981/2002 cut-off events. [2023-09-01 12:28:03,606 INFO L131 PetriNetUnfolder]: For 66776/66776 co-relation queries the response was YES. [2023-09-01 12:28:03,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18753 conditions, 2002 events. 981/2002 cut-off events. For 66776/66776 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 13431 event pairs, 80 based on Foata normal form. 22/2024 useless extension candidates. Maximal degree in co-relation 18649. Up to 1634 conditions per place. [2023-09-01 12:28:03,625 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 333 selfloop transitions, 82 changer transitions 0/415 dead transitions. [2023-09-01 12:28:03,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 415 transitions, 9353 flow [2023-09-01 12:28:03,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 12:28:03,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 12:28:03,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2618 transitions. [2023-09-01 12:28:03,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236245954692557 [2023-09-01 12:28:03,629 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2618 transitions. [2023-09-01 12:28:03,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2618 transitions. [2023-09-01 12:28:03,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:03,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2618 transitions. [2023-09-01 12:28:03,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 174.53333333333333) internal successors, (2618), 15 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:03,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:03,636 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:03,636 INFO L175 Difference]: Start difference. First operand has 296 places, 372 transitions, 8028 flow. Second operand 15 states and 2618 transitions. [2023-09-01 12:28:03,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 415 transitions, 9353 flow [2023-09-01 12:28:03,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 415 transitions, 9204 flow, removed 30 selfloop flow, removed 9 redundant places. [2023-09-01 12:28:03,941 INFO L231 Difference]: Finished difference. Result has 305 places, 378 transitions, 8217 flow [2023-09-01 12:28:03,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=7695, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8217, PETRI_PLACES=305, PETRI_TRANSITIONS=378} [2023-09-01 12:28:03,942 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 285 predicate places. [2023-09-01 12:28:03,942 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 378 transitions, 8217 flow [2023-09-01 12:28:03,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:03,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:03,942 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:03,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:04,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-09-01 12:28:04,143 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:04,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:04,144 INFO L85 PathProgramCache]: Analyzing trace with hash -591752163, now seen corresponding path program 25 times [2023-09-01 12:28:04,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:04,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819137257] [2023-09-01 12:28:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:04,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:04,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:04,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819137257] [2023-09-01 12:28:04,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819137257] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:04,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128394899] [2023-09-01 12:28:04,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:28:04,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:04,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:04,221 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:04,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-09-01 12:28:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:04,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:28:04,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:04,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:04,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:04,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128394899] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:04,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:04,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-09-01 12:28:04,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781489927] [2023-09-01 12:28:04,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:04,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 12:28:04,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:04,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 12:28:04,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-09-01 12:28:04,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:28:04,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 378 transitions, 8217 flow. Second operand has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:04,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:04,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:28:04,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:05,087 INFO L130 PetriNetUnfolder]: 1097/2244 cut-off events. [2023-09-01 12:28:05,087 INFO L131 PetriNetUnfolder]: For 81764/81764 co-relation queries the response was YES. [2023-09-01 12:28:05,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21637 conditions, 2244 events. 1097/2244 cut-off events. For 81764/81764 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 15527 event pairs, 74 based on Foata normal form. 16/2260 useless extension candidates. Maximal degree in co-relation 21529. Up to 1322 conditions per place. [2023-09-01 12:28:05,153 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 331 selfloop transitions, 148 changer transitions 0/479 dead transitions. [2023-09-01 12:28:05,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 479 transitions, 11097 flow [2023-09-01 12:28:05,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 12:28:05,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 12:28:05,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2629 transitions. [2023-09-01 12:28:05,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254045307443366 [2023-09-01 12:28:05,156 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2629 transitions. [2023-09-01 12:28:05,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2629 transitions. [2023-09-01 12:28:05,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:05,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2629 transitions. [2023-09-01 12:28:05,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 175.26666666666668) internal successors, (2629), 15 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:05,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:05,163 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 412.0) internal successors, (6592), 16 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:05,163 INFO L175 Difference]: Start difference. First operand has 305 places, 378 transitions, 8217 flow. Second operand 15 states and 2629 transitions. [2023-09-01 12:28:05,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 479 transitions, 11097 flow [2023-09-01 12:28:05,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 479 transitions, 10869 flow, removed 22 selfloop flow, removed 9 redundant places. [2023-09-01 12:28:05,504 INFO L231 Difference]: Finished difference. Result has 315 places, 411 transitions, 9359 flow [2023-09-01 12:28:05,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=8011, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9359, PETRI_PLACES=315, PETRI_TRANSITIONS=411} [2023-09-01 12:28:05,504 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 295 predicate places. [2023-09-01 12:28:05,504 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 411 transitions, 9359 flow [2023-09-01 12:28:05,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:05,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:05,505 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:05,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-09-01 12:28:05,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-09-01 12:28:05,706 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:05,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:05,707 INFO L85 PathProgramCache]: Analyzing trace with hash 179362069, now seen corresponding path program 26 times [2023-09-01 12:28:05,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:05,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100147745] [2023-09-01 12:28:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:05,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:05,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:05,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100147745] [2023-09-01 12:28:05,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100147745] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:05,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022276750] [2023-09-01 12:28:05,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:28:05,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:05,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:05,765 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:05,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-09-01 12:28:05,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:28:05,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:05,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:28:05,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:05,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:05,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022276750] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:05,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:05,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-09-01 12:28:05,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860578275] [2023-09-01 12:28:05,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:05,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 12:28:05,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:05,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 12:28:05,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-09-01 12:28:05,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:28:05,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 411 transitions, 9359 flow. Second operand has 13 states, 13 states have (on average 171.0) internal successors, (2223), 13 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:05,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:05,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:28:05,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:06,725 INFO L130 PetriNetUnfolder]: 1134/2297 cut-off events. [2023-09-01 12:28:06,725 INFO L131 PetriNetUnfolder]: For 85699/85699 co-relation queries the response was YES. [2023-09-01 12:28:06,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22998 conditions, 2297 events. 1134/2297 cut-off events. For 85699/85699 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 15770 event pairs, 96 based on Foata normal form. 12/2309 useless extension candidates. Maximal degree in co-relation 22887. Up to 2035 conditions per place. [2023-09-01 12:28:06,749 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 375 selfloop transitions, 76 changer transitions 0/451 dead transitions. [2023-09-01 12:28:06,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 451 transitions, 11023 flow [2023-09-01 12:28:06,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:28:06,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:28:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1917 transitions. [2023-09-01 12:28:06,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229920564872021 [2023-09-01 12:28:06,756 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1917 transitions. [2023-09-01 12:28:06,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1917 transitions. [2023-09-01 12:28:06,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:06,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1917 transitions. [2023-09-01 12:28:06,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 174.27272727272728) internal successors, (1917), 11 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:06,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:06,761 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:06,761 INFO L175 Difference]: Start difference. First operand has 315 places, 411 transitions, 9359 flow. Second operand 11 states and 1917 transitions. [2023-09-01 12:28:06,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 451 transitions, 11023 flow [2023-09-01 12:28:07,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 451 transitions, 10660 flow, removed 114 selfloop flow, removed 13 redundant places. [2023-09-01 12:28:07,199 INFO L231 Difference]: Finished difference. Result has 312 places, 428 transitions, 9632 flow [2023-09-01 12:28:07,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=8925, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9632, PETRI_PLACES=312, PETRI_TRANSITIONS=428} [2023-09-01 12:28:07,200 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 292 predicate places. [2023-09-01 12:28:07,200 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 428 transitions, 9632 flow [2023-09-01 12:28:07,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 171.0) internal successors, (2223), 13 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:07,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:07,200 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:07,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-09-01 12:28:07,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:07,402 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:07,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:07,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1678716689, now seen corresponding path program 27 times [2023-09-01 12:28:07,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:07,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009050491] [2023-09-01 12:28:07,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:07,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:07,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:07,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:07,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009050491] [2023-09-01 12:28:07,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009050491] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:07,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961307228] [2023-09-01 12:28:07,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:28:07,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:07,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:07,466 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:07,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-09-01 12:28:07,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 12:28:07,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:07,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:28:07,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:07,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:07,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961307228] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:07,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:07,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 12:28:07,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669724704] [2023-09-01 12:28:07,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:07,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:28:07,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:07,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:28:07,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:28:07,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:28:07,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 428 transitions, 9632 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:07,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:07,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:28:07,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:08,417 INFO L130 PetriNetUnfolder]: 1192/2425 cut-off events. [2023-09-01 12:28:08,417 INFO L131 PetriNetUnfolder]: For 90262/90262 co-relation queries the response was YES. [2023-09-01 12:28:08,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24067 conditions, 2425 events. 1192/2425 cut-off events. For 90262/90262 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 16940 event pairs, 94 based on Foata normal form. 12/2437 useless extension candidates. Maximal degree in co-relation 23957. Up to 1795 conditions per place. [2023-09-01 12:28:08,444 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 358 selfloop transitions, 135 changer transitions 0/493 dead transitions. [2023-09-01 12:28:08,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 493 transitions, 11552 flow [2023-09-01 12:28:08,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 12:28:08,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 12:28:08,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2450 transitions. [2023-09-01 12:28:08,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42475728155339804 [2023-09-01 12:28:08,446 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2450 transitions. [2023-09-01 12:28:08,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2450 transitions. [2023-09-01 12:28:08,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:08,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2450 transitions. [2023-09-01 12:28:08,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 175.0) internal successors, (2450), 14 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:08,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:08,452 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:08,452 INFO L175 Difference]: Start difference. First operand has 312 places, 428 transitions, 9632 flow. Second operand 14 states and 2450 transitions. [2023-09-01 12:28:08,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 493 transitions, 11552 flow [2023-09-01 12:28:08,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 493 transitions, 11350 flow, removed 46 selfloop flow, removed 6 redundant places. [2023-09-01 12:28:08,946 INFO L231 Difference]: Finished difference. Result has 321 places, 444 transitions, 10178 flow [2023-09-01 12:28:08,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=9370, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10178, PETRI_PLACES=321, PETRI_TRANSITIONS=444} [2023-09-01 12:28:08,947 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 301 predicate places. [2023-09-01 12:28:08,947 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 444 transitions, 10178 flow [2023-09-01 12:28:08,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:08,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:08,947 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:08,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-09-01 12:28:09,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-09-01 12:28:09,152 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:09,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:09,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1591495955, now seen corresponding path program 28 times [2023-09-01 12:28:09,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:09,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129609924] [2023-09-01 12:28:09,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:09,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:09,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:09,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:09,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129609924] [2023-09-01 12:28:09,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129609924] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:09,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83364216] [2023-09-01 12:28:09,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:28:09,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:09,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:09,209 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:09,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-09-01 12:28:09,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:28:09,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:09,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:28:09,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:09,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:09,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83364216] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:09,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:09,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 12:28:09,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255548087] [2023-09-01 12:28:09,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:09,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:28:09,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:09,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:28:09,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:28:09,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:28:09,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 444 transitions, 10178 flow. Second operand has 12 states, 12 states have (on average 171.16666666666666) internal successors, (2054), 12 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:09,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:09,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:28:09,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:10,160 INFO L130 PetriNetUnfolder]: 1174/2377 cut-off events. [2023-09-01 12:28:10,160 INFO L131 PetriNetUnfolder]: For 90642/90642 co-relation queries the response was YES. [2023-09-01 12:28:10,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24034 conditions, 2377 events. 1174/2377 cut-off events. For 90642/90642 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 16482 event pairs, 40 based on Foata normal form. 12/2389 useless extension candidates. Maximal degree in co-relation 23923. Up to 1021 conditions per place. [2023-09-01 12:28:10,185 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 295 selfloop transitions, 196 changer transitions 4/495 dead transitions. [2023-09-01 12:28:10,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 495 transitions, 11925 flow [2023-09-01 12:28:10,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 12:28:10,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 12:28:10,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3297 transitions. [2023-09-01 12:28:10,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4211803781297905 [2023-09-01 12:28:10,187 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3297 transitions. [2023-09-01 12:28:10,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3297 transitions. [2023-09-01 12:28:10,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:10,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3297 transitions. [2023-09-01 12:28:10,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 173.52631578947367) internal successors, (3297), 19 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:10,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 412.0) internal successors, (8240), 20 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:10,193 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 412.0) internal successors, (8240), 20 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:10,193 INFO L175 Difference]: Start difference. First operand has 321 places, 444 transitions, 10178 flow. Second operand 19 states and 3297 transitions. [2023-09-01 12:28:10,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 495 transitions, 11925 flow [2023-09-01 12:28:10,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 495 transitions, 11751 flow, removed 20 selfloop flow, removed 9 redundant places. [2023-09-01 12:28:10,601 INFO L231 Difference]: Finished difference. Result has 330 places, 444 transitions, 10466 flow [2023-09-01 12:28:10,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=9899, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10466, PETRI_PLACES=330, PETRI_TRANSITIONS=444} [2023-09-01 12:28:10,601 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 310 predicate places. [2023-09-01 12:28:10,601 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 444 transitions, 10466 flow [2023-09-01 12:28:10,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.16666666666666) internal successors, (2054), 12 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:10,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:10,602 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:10,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:10,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-09-01 12:28:10,803 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:10,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:10,803 INFO L85 PathProgramCache]: Analyzing trace with hash 139348501, now seen corresponding path program 29 times [2023-09-01 12:28:10,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:10,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758794933] [2023-09-01 12:28:10,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:10,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:10,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:10,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758794933] [2023-09-01 12:28:10,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758794933] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:10,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309193395] [2023-09-01 12:28:10,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:28:10,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:10,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:10,860 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:10,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-09-01 12:28:10,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:28:10,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:10,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:28:10,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:10,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:11,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309193395] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:11,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:11,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-09-01 12:28:11,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744335095] [2023-09-01 12:28:11,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:11,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:28:11,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:11,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:28:11,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:28:11,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:28:11,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 444 transitions, 10466 flow. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:11,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:11,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:28:11,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:11,795 INFO L130 PetriNetUnfolder]: 1165/2364 cut-off events. [2023-09-01 12:28:11,795 INFO L131 PetriNetUnfolder]: For 93176/93176 co-relation queries the response was YES. [2023-09-01 12:28:11,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24601 conditions, 2364 events. 1165/2364 cut-off events. For 93176/93176 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 16451 event pairs, 168 based on Foata normal form. 8/2372 useless extension candidates. Maximal degree in co-relation 24489. Up to 704 conditions per place. [2023-09-01 12:28:11,821 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 309 selfloop transitions, 198 changer transitions 2/509 dead transitions. [2023-09-01 12:28:11,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 509 transitions, 12497 flow [2023-09-01 12:28:11,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 12:28:11,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 12:28:11,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3135 transitions. [2023-09-01 12:28:11,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4227346278317152 [2023-09-01 12:28:11,823 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3135 transitions. [2023-09-01 12:28:11,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3135 transitions. [2023-09-01 12:28:11,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:11,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3135 transitions. [2023-09-01 12:28:11,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 174.16666666666666) internal successors, (3135), 18 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:11,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:11,829 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 412.0) internal successors, (7828), 19 states have internal predecessors, (7828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:11,829 INFO L175 Difference]: Start difference. First operand has 330 places, 444 transitions, 10466 flow. Second operand 18 states and 3135 transitions. [2023-09-01 12:28:11,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 509 transitions, 12497 flow [2023-09-01 12:28:12,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 509 transitions, 12320 flow, removed 12 selfloop flow, removed 11 redundant places. [2023-09-01 12:28:12,273 INFO L231 Difference]: Finished difference. Result has 334 places, 449 transitions, 10940 flow [2023-09-01 12:28:12,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=10168, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10940, PETRI_PLACES=334, PETRI_TRANSITIONS=449} [2023-09-01 12:28:12,274 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 314 predicate places. [2023-09-01 12:28:12,274 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 449 transitions, 10940 flow [2023-09-01 12:28:12,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:12,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:12,275 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:12,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:12,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-09-01 12:28:12,481 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:12,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:12,481 INFO L85 PathProgramCache]: Analyzing trace with hash -421013737, now seen corresponding path program 30 times [2023-09-01 12:28:12,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:12,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041371978] [2023-09-01 12:28:12,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:12,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:12,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:12,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041371978] [2023-09-01 12:28:12,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041371978] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:12,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731176621] [2023-09-01 12:28:12,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:28:12,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:12,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:12,544 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:12,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-09-01 12:28:12,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 12:28:12,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:12,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 12:28:12,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:12,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:12,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731176621] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:12,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:12,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-09-01 12:28:12,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939558921] [2023-09-01 12:28:12,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:12,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 12:28:12,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:12,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 12:28:12,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-09-01 12:28:12,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:28:12,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 449 transitions, 10940 flow. Second operand has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:12,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:12,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:28:12,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:13,590 INFO L130 PetriNetUnfolder]: 1160/2349 cut-off events. [2023-09-01 12:28:13,590 INFO L131 PetriNetUnfolder]: For 95384/95384 co-relation queries the response was YES. [2023-09-01 12:28:13,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25048 conditions, 2349 events. 1160/2349 cut-off events. For 95384/95384 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 16327 event pairs, 214 based on Foata normal form. 2/2351 useless extension candidates. Maximal degree in co-relation 24935. Up to 900 conditions per place. [2023-09-01 12:28:13,619 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 320 selfloop transitions, 163 changer transitions 4/487 dead transitions. [2023-09-01 12:28:13,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 487 transitions, 12329 flow [2023-09-01 12:28:13,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 12:28:13,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 12:28:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2777 transitions. [2023-09-01 12:28:13,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212682038834951 [2023-09-01 12:28:13,621 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2777 transitions. [2023-09-01 12:28:13,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2777 transitions. [2023-09-01 12:28:13,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:13,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2777 transitions. [2023-09-01 12:28:13,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 173.5625) internal successors, (2777), 16 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:13,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 412.0) internal successors, (7004), 17 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:13,626 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 412.0) internal successors, (7004), 17 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:13,626 INFO L175 Difference]: Start difference. First operand has 334 places, 449 transitions, 10940 flow. Second operand 16 states and 2777 transitions. [2023-09-01 12:28:13,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 487 transitions, 12329 flow [2023-09-01 12:28:14,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 487 transitions, 11966 flow, removed 77 selfloop flow, removed 10 redundant places. [2023-09-01 12:28:14,109 INFO L231 Difference]: Finished difference. Result has 336 places, 445 transitions, 10801 flow [2023-09-01 12:28:14,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=10516, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10801, PETRI_PLACES=336, PETRI_TRANSITIONS=445} [2023-09-01 12:28:14,110 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 316 predicate places. [2023-09-01 12:28:14,110 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 445 transitions, 10801 flow [2023-09-01 12:28:14,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.92307692307693) internal successors, (2222), 13 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:14,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:14,110 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:14,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-09-01 12:28:14,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:14,311 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:14,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:14,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1081948156, now seen corresponding path program 31 times [2023-09-01 12:28:14,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:14,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274815408] [2023-09-01 12:28:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:14,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:14,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:14,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:14,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274815408] [2023-09-01 12:28:14,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274815408] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:14,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123605236] [2023-09-01 12:28:14,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:28:14,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:14,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:14,945 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:14,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-09-01 12:28:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:15,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 12:28:15,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:15,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:15,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123605236] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:15,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:15,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-09-01 12:28:15,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043094842] [2023-09-01 12:28:15,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:15,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 12:28:15,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:15,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 12:28:15,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-09-01 12:28:15,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-09-01 12:28:15,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 445 transitions, 10801 flow. Second operand has 20 states, 20 states have (on average 163.0) internal successors, (3260), 20 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:15,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:15,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-09-01 12:28:15,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:16,735 INFO L130 PetriNetUnfolder]: 1351/2773 cut-off events. [2023-09-01 12:28:16,736 INFO L131 PetriNetUnfolder]: For 111219/111221 co-relation queries the response was YES. [2023-09-01 12:28:16,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29422 conditions, 2773 events. 1351/2773 cut-off events. For 111219/111221 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 20272 event pairs, 91 based on Foata normal form. 5/2773 useless extension candidates. Maximal degree in co-relation 29309. Up to 2167 conditions per place. [2023-09-01 12:28:16,779 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 455 selfloop transitions, 105 changer transitions 15/585 dead transitions. [2023-09-01 12:28:16,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 585 transitions, 14581 flow [2023-09-01 12:28:16,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:28:16,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:28:16,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1851 transitions. [2023-09-01 12:28:16,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4084289496910856 [2023-09-01 12:28:16,782 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1851 transitions. [2023-09-01 12:28:16,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1851 transitions. [2023-09-01 12:28:16,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:16,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1851 transitions. [2023-09-01 12:28:16,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 168.27272727272728) internal successors, (1851), 11 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:16,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:16,787 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:16,787 INFO L175 Difference]: Start difference. First operand has 336 places, 445 transitions, 10801 flow. Second operand 11 states and 1851 transitions. [2023-09-01 12:28:16,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 585 transitions, 14581 flow [2023-09-01 12:28:17,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 585 transitions, 14247 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-09-01 12:28:17,338 INFO L231 Difference]: Finished difference. Result has 338 places, 507 transitions, 12541 flow [2023-09-01 12:28:17,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=10548, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12541, PETRI_PLACES=338, PETRI_TRANSITIONS=507} [2023-09-01 12:28:17,339 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 318 predicate places. [2023-09-01 12:28:17,340 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 507 transitions, 12541 flow [2023-09-01 12:28:17,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 163.0) internal successors, (3260), 20 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:17,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:17,340 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:17,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:17,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:17,546 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:17,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:17,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1129985218, now seen corresponding path program 32 times [2023-09-01 12:28:17,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:17,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706561717] [2023-09-01 12:28:17,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:17,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:17,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:17,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706561717] [2023-09-01 12:28:17,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706561717] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:17,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027705821] [2023-09-01 12:28:17,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:28:17,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:17,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:17,961 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:17,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-09-01 12:28:18,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:28:18,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:18,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 12:28:18,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:18,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:18,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:18,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027705821] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:18,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:18,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-09-01 12:28:18,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097651629] [2023-09-01 12:28:18,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:18,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 12:28:18,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:18,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 12:28:18,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-09-01 12:28:18,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-09-01 12:28:18,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 507 transitions, 12541 flow. Second operand has 15 states, 15 states have (on average 163.2) internal successors, (2448), 15 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:18,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:18,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-09-01 12:28:18,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:19,714 INFO L130 PetriNetUnfolder]: 1355/2761 cut-off events. [2023-09-01 12:28:19,715 INFO L131 PetriNetUnfolder]: For 115617/115619 co-relation queries the response was YES. [2023-09-01 12:28:19,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30483 conditions, 2761 events. 1355/2761 cut-off events. For 115617/115619 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 19967 event pairs, 103 based on Foata normal form. 7/2763 useless extension candidates. Maximal degree in co-relation 30361. Up to 2380 conditions per place. [2023-09-01 12:28:19,813 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 456 selfloop transitions, 79 changer transitions 17/562 dead transitions. [2023-09-01 12:28:19,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 562 transitions, 14236 flow [2023-09-01 12:28:19,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 12:28:19,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 12:28:19,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2004 transitions. [2023-09-01 12:28:19,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053398058252427 [2023-09-01 12:28:19,815 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2004 transitions. [2023-09-01 12:28:19,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2004 transitions. [2023-09-01 12:28:19,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:19,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2004 transitions. [2023-09-01 12:28:19,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 167.0) internal successors, (2004), 12 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:19,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 412.0) internal successors, (5356), 13 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:19,821 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 412.0) internal successors, (5356), 13 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:19,821 INFO L175 Difference]: Start difference. First operand has 338 places, 507 transitions, 12541 flow. Second operand 12 states and 2004 transitions. [2023-09-01 12:28:19,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 562 transitions, 14236 flow [2023-09-01 12:28:20,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 562 transitions, 13816 flow, removed 205 selfloop flow, removed 4 redundant places. [2023-09-01 12:28:20,583 INFO L231 Difference]: Finished difference. Result has 348 places, 513 transitions, 12589 flow [2023-09-01 12:28:20,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=12177, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12589, PETRI_PLACES=348, PETRI_TRANSITIONS=513} [2023-09-01 12:28:20,583 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 328 predicate places. [2023-09-01 12:28:20,583 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 513 transitions, 12589 flow [2023-09-01 12:28:20,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 163.2) internal successors, (2448), 15 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:20,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:20,584 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:20,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-09-01 12:28:20,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-09-01 12:28:20,785 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:20,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:20,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1044264796, now seen corresponding path program 33 times [2023-09-01 12:28:20,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:20,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770505566] [2023-09-01 12:28:20,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:20,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:21,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:21,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770505566] [2023-09-01 12:28:21,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770505566] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:21,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121212191] [2023-09-01 12:28:21,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:28:21,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:21,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:21,173 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:21,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-09-01 12:28:21,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 12:28:21,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:21,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 12:28:21,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:21,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:21,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121212191] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:21,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:21,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-09-01 12:28:21,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940991437] [2023-09-01 12:28:21,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:21,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 12:28:21,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:21,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 12:28:21,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-09-01 12:28:21,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-09-01 12:28:21,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 513 transitions, 12589 flow. Second operand has 20 states, 20 states have (on average 162.9) internal successors, (3258), 20 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:21,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:21,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-09-01 12:28:21,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:22,872 INFO L130 PetriNetUnfolder]: 1324/2676 cut-off events. [2023-09-01 12:28:22,872 INFO L131 PetriNetUnfolder]: For 105638/105640 co-relation queries the response was YES. [2023-09-01 12:28:22,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29112 conditions, 2676 events. 1324/2676 cut-off events. For 105638/105640 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 19077 event pairs, 90 based on Foata normal form. 3/2674 useless extension candidates. Maximal degree in co-relation 28988. Up to 2174 conditions per place. [2023-09-01 12:28:22,911 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 446 selfloop transitions, 102 changer transitions 5/563 dead transitions. [2023-09-01 12:28:22,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 563 transitions, 14228 flow [2023-09-01 12:28:22,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:28:22,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:28:22,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1516 transitions. [2023-09-01 12:28:22,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40884573894282633 [2023-09-01 12:28:22,913 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1516 transitions. [2023-09-01 12:28:22,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1516 transitions. [2023-09-01 12:28:22,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:22,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1516 transitions. [2023-09-01 12:28:22,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 168.44444444444446) internal successors, (1516), 9 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:22,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:22,917 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:22,918 INFO L175 Difference]: Start difference. First operand has 348 places, 513 transitions, 12589 flow. Second operand 9 states and 1516 transitions. [2023-09-01 12:28:22,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 563 transitions, 14228 flow [2023-09-01 12:28:23,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 563 transitions, 13823 flow, removed 147 selfloop flow, removed 6 redundant places. [2023-09-01 12:28:23,709 INFO L231 Difference]: Finished difference. Result has 349 places, 515 transitions, 12553 flow [2023-09-01 12:28:23,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=12204, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12553, PETRI_PLACES=349, PETRI_TRANSITIONS=515} [2023-09-01 12:28:23,709 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 329 predicate places. [2023-09-01 12:28:23,709 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 515 transitions, 12553 flow [2023-09-01 12:28:23,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 162.9) internal successors, (3258), 20 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:23,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:23,710 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:23,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:23,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-09-01 12:28:23,910 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:23,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:23,911 INFO L85 PathProgramCache]: Analyzing trace with hash -392624, now seen corresponding path program 34 times [2023-09-01 12:28:23,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:23,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245151167] [2023-09-01 12:28:23,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:23,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:24,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:24,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245151167] [2023-09-01 12:28:24,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245151167] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:24,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314922026] [2023-09-01 12:28:24,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:28:24,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:24,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:24,241 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:24,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-09-01 12:28:24,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:28:24,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:24,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 12:28:24,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:24,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:24,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:24,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314922026] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:24,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:24,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-09-01 12:28:24,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858124393] [2023-09-01 12:28:24,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:24,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 12:28:24,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:24,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 12:28:24,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:28:24,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-09-01 12:28:24,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 515 transitions, 12553 flow. Second operand has 18 states, 18 states have (on average 163.0) internal successors, (2934), 18 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:24,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:24,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-09-01 12:28:24,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:25,892 INFO L130 PetriNetUnfolder]: 1315/2649 cut-off events. [2023-09-01 12:28:25,892 INFO L131 PetriNetUnfolder]: For 106535/106537 co-relation queries the response was YES. [2023-09-01 12:28:25,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28554 conditions, 2649 events. 1315/2649 cut-off events. For 106535/106537 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18800 event pairs, 89 based on Foata normal form. 3/2647 useless extension candidates. Maximal degree in co-relation 28430. Up to 2246 conditions per place. [2023-09-01 12:28:25,923 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 454 selfloop transitions, 95 changer transitions 5/564 dead transitions. [2023-09-01 12:28:25,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 564 transitions, 14059 flow [2023-09-01 12:28:25,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:28:25,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:28:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1841 transitions. [2023-09-01 12:28:25,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40622241835834066 [2023-09-01 12:28:25,926 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1841 transitions. [2023-09-01 12:28:25,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1841 transitions. [2023-09-01 12:28:25,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:25,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1841 transitions. [2023-09-01 12:28:25,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 167.36363636363637) internal successors, (1841), 11 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:25,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:25,931 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:25,931 INFO L175 Difference]: Start difference. First operand has 349 places, 515 transitions, 12553 flow. Second operand 11 states and 1841 transitions. [2023-09-01 12:28:25,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 564 transitions, 14059 flow [2023-09-01 12:28:26,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 564 transitions, 13815 flow, removed 41 selfloop flow, removed 6 redundant places. [2023-09-01 12:28:26,581 INFO L231 Difference]: Finished difference. Result has 354 places, 521 transitions, 12684 flow [2023-09-01 12:28:26,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=12315, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12684, PETRI_PLACES=354, PETRI_TRANSITIONS=521} [2023-09-01 12:28:26,582 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 334 predicate places. [2023-09-01 12:28:26,582 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 521 transitions, 12684 flow [2023-09-01 12:28:26,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 163.0) internal successors, (2934), 18 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:26,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:26,582 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:26,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:26,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-09-01 12:28:26,783 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:26,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:26,783 INFO L85 PathProgramCache]: Analyzing trace with hash 2125930154, now seen corresponding path program 35 times [2023-09-01 12:28:26,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:26,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658912694] [2023-09-01 12:28:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:26,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:27,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:27,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658912694] [2023-09-01 12:28:27,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658912694] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:27,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108900258] [2023-09-01 12:28:27,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:28:27,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:27,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:27,131 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:27,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-09-01 12:28:27,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 12:28:27,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:27,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 12:28:27,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:27,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:27,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:27,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108900258] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:27,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:27,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-09-01 12:28:27,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966338316] [2023-09-01 12:28:27,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:27,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 12:28:27,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:27,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 12:28:27,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-09-01 12:28:27,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-09-01 12:28:27,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 521 transitions, 12684 flow. Second operand has 17 states, 17 states have (on average 163.1764705882353) internal successors, (2774), 17 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:27,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:27,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-09-01 12:28:27,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:28,627 INFO L130 PetriNetUnfolder]: 1394/2843 cut-off events. [2023-09-01 12:28:28,628 INFO L131 PetriNetUnfolder]: For 115875/115877 co-relation queries the response was YES. [2023-09-01 12:28:28,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30514 conditions, 2843 events. 1394/2843 cut-off events. For 115875/115877 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 20650 event pairs, 110 based on Foata normal form. 4/2842 useless extension candidates. Maximal degree in co-relation 30389. Up to 2509 conditions per place. [2023-09-01 12:28:28,667 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 488 selfloop transitions, 90 changer transitions 6/594 dead transitions. [2023-09-01 12:28:28,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 594 transitions, 15081 flow [2023-09-01 12:28:28,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 12:28:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 12:28:28,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1344 transitions. [2023-09-01 12:28:28,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4077669902912621 [2023-09-01 12:28:28,731 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1344 transitions. [2023-09-01 12:28:28,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1344 transitions. [2023-09-01 12:28:28,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:28,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1344 transitions. [2023-09-01 12:28:28,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:28,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:28,734 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:28,734 INFO L175 Difference]: Start difference. First operand has 354 places, 521 transitions, 12684 flow. Second operand 8 states and 1344 transitions. [2023-09-01 12:28:28,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 594 transitions, 15081 flow [2023-09-01 12:28:29,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 594 transitions, 14861 flow, removed 22 selfloop flow, removed 9 redundant places. [2023-09-01 12:28:29,403 INFO L231 Difference]: Finished difference. Result has 355 places, 556 transitions, 13700 flow [2023-09-01 12:28:29,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=12470, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13700, PETRI_PLACES=355, PETRI_TRANSITIONS=556} [2023-09-01 12:28:29,404 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 335 predicate places. [2023-09-01 12:28:29,404 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 556 transitions, 13700 flow [2023-09-01 12:28:29,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 163.1764705882353) internal successors, (2774), 17 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:29,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:29,404 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:29,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-09-01 12:28:29,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-09-01 12:28:29,605 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:29,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:29,605 INFO L85 PathProgramCache]: Analyzing trace with hash -2021571692, now seen corresponding path program 36 times [2023-09-01 12:28:29,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:29,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340073620] [2023-09-01 12:28:29,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:29,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:29,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:29,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:29,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340073620] [2023-09-01 12:28:29,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340073620] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:29,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044086633] [2023-09-01 12:28:29,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:28:29,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:29,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:29,925 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:29,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-09-01 12:28:30,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 12:28:30,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:30,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 12:28:30,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:30,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:30,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:30,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044086633] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:30,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:30,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-09-01 12:28:30,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394490908] [2023-09-01 12:28:30,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:30,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 12:28:30,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:30,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 12:28:30,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-09-01 12:28:30,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-09-01 12:28:30,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 556 transitions, 13700 flow. Second operand has 17 states, 17 states have (on average 163.23529411764707) internal successors, (2775), 17 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:30,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:30,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-09-01 12:28:30,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:31,566 INFO L130 PetriNetUnfolder]: 1382/2807 cut-off events. [2023-09-01 12:28:31,566 INFO L131 PetriNetUnfolder]: For 118289/118291 co-relation queries the response was YES. [2023-09-01 12:28:31,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30558 conditions, 2807 events. 1382/2807 cut-off events. For 118289/118291 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 20271 event pairs, 110 based on Foata normal form. 4/2806 useless extension candidates. Maximal degree in co-relation 30431. Up to 2509 conditions per place. [2023-09-01 12:28:31,601 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 489 selfloop transitions, 85 changer transitions 9/593 dead transitions. [2023-09-01 12:28:31,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 593 transitions, 15227 flow [2023-09-01 12:28:31,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 12:28:31,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 12:28:31,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1344 transitions. [2023-09-01 12:28:31,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4077669902912621 [2023-09-01 12:28:31,603 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1344 transitions. [2023-09-01 12:28:31,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1344 transitions. [2023-09-01 12:28:31,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:31,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1344 transitions. [2023-09-01 12:28:31,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:31,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:31,606 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:31,607 INFO L175 Difference]: Start difference. First operand has 355 places, 556 transitions, 13700 flow. Second operand 8 states and 1344 transitions. [2023-09-01 12:28:31,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 593 transitions, 15227 flow [2023-09-01 12:28:32,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 593 transitions, 14866 flow, removed 131 selfloop flow, removed 4 redundant places. [2023-09-01 12:28:32,372 INFO L231 Difference]: Finished difference. Result has 360 places, 556 transitions, 13593 flow [2023-09-01 12:28:32,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=13375, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13593, PETRI_PLACES=360, PETRI_TRANSITIONS=556} [2023-09-01 12:28:32,373 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 340 predicate places. [2023-09-01 12:28:32,373 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 556 transitions, 13593 flow [2023-09-01 12:28:32,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 163.23529411764707) internal successors, (2775), 17 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:32,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:32,374 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:32,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:32,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:32,579 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:32,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:32,580 INFO L85 PathProgramCache]: Analyzing trace with hash -940248734, now seen corresponding path program 37 times [2023-09-01 12:28:32,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:32,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447685630] [2023-09-01 12:28:32,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:32,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:32,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:32,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447685630] [2023-09-01 12:28:32,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447685630] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:32,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715960801] [2023-09-01 12:28:32,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:28:32,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:32,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:32,911 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:32,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-09-01 12:28:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:33,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 12:28:33,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:33,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:33,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715960801] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:33,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:33,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-09-01 12:28:33,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660271731] [2023-09-01 12:28:33,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:33,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 12:28:33,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:33,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 12:28:33,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-09-01 12:28:33,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-09-01 12:28:33,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 556 transitions, 13593 flow. Second operand has 17 states, 17 states have (on average 163.23529411764707) internal successors, (2775), 17 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:33,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:33,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-09-01 12:28:33,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:34,375 INFO L130 PetriNetUnfolder]: 1376/2773 cut-off events. [2023-09-01 12:28:34,375 INFO L131 PetriNetUnfolder]: For 114040/114042 co-relation queries the response was YES. [2023-09-01 12:28:34,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30062 conditions, 2773 events. 1376/2773 cut-off events. For 114040/114042 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 19832 event pairs, 116 based on Foata normal form. 4/2772 useless extension candidates. Maximal degree in co-relation 29933. Up to 2558 conditions per place. [2023-09-01 12:28:34,412 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 504 selfloop transitions, 67 changer transitions 7/588 dead transitions. [2023-09-01 12:28:34,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 588 transitions, 15009 flow [2023-09-01 12:28:34,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 12:28:34,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 12:28:34,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1339 transitions. [2023-09-01 12:28:34,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2023-09-01 12:28:34,414 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1339 transitions. [2023-09-01 12:28:34,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1339 transitions. [2023-09-01 12:28:34,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:34,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1339 transitions. [2023-09-01 12:28:34,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 167.375) internal successors, (1339), 8 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:34,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:34,416 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:34,416 INFO L175 Difference]: Start difference. First operand has 360 places, 556 transitions, 13593 flow. Second operand 8 states and 1339 transitions. [2023-09-01 12:28:34,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 588 transitions, 15009 flow [2023-09-01 12:28:35,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 588 transitions, 14876 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-09-01 12:28:35,332 INFO L231 Difference]: Finished difference. Result has 365 places, 559 transitions, 13732 flow [2023-09-01 12:28:35,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=13464, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13732, PETRI_PLACES=365, PETRI_TRANSITIONS=559} [2023-09-01 12:28:35,333 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 345 predicate places. [2023-09-01 12:28:35,333 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 559 transitions, 13732 flow [2023-09-01 12:28:35,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 163.23529411764707) internal successors, (2775), 17 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:35,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:35,333 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:35,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-09-01 12:28:35,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-09-01 12:28:35,534 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:35,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:35,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1160083242, now seen corresponding path program 38 times [2023-09-01 12:28:35,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:35,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129710762] [2023-09-01 12:28:35,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:35,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:35,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:35,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129710762] [2023-09-01 12:28:35,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129710762] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:35,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197954494] [2023-09-01 12:28:35,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:28:35,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:35,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:35,993 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:36,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-09-01 12:28:36,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:28:36,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:36,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 12:28:36,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:36,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:36,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197954494] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:36,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:36,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2023-09-01 12:28:36,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32852596] [2023-09-01 12:28:36,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:36,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 12:28:36,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:36,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 12:28:36,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-09-01 12:28:36,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 412 [2023-09-01 12:28:36,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 559 transitions, 13732 flow. Second operand has 17 states, 17 states have (on average 160.11764705882354) internal successors, (2722), 17 states have internal predecessors, (2722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:36,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:36,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 412 [2023-09-01 12:28:36,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:38,003 INFO L130 PetriNetUnfolder]: 1481/3017 cut-off events. [2023-09-01 12:28:38,003 INFO L131 PetriNetUnfolder]: For 126145/126147 co-relation queries the response was YES. [2023-09-01 12:28:38,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32741 conditions, 3017 events. 1481/3017 cut-off events. For 126145/126147 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 22201 event pairs, 114 based on Foata normal form. 9/3021 useless extension candidates. Maximal degree in co-relation 32610. Up to 2625 conditions per place. [2023-09-01 12:28:38,041 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 542 selfloop transitions, 98 changer transitions 25/675 dead transitions. [2023-09-01 12:28:38,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 675 transitions, 17044 flow [2023-09-01 12:28:38,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 12:28:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 12:28:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2132 transitions. [2023-09-01 12:28:38,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39805825242718446 [2023-09-01 12:28:38,043 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2132 transitions. [2023-09-01 12:28:38,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2132 transitions. [2023-09-01 12:28:38,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:38,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2132 transitions. [2023-09-01 12:28:38,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 164.0) internal successors, (2132), 13 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:38,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:38,048 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 412.0) internal successors, (5768), 14 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:38,048 INFO L175 Difference]: Start difference. First operand has 365 places, 559 transitions, 13732 flow. Second operand 13 states and 2132 transitions. [2023-09-01 12:28:38,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 675 transitions, 17044 flow [2023-09-01 12:28:38,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 675 transitions, 16773 flow, removed 62 selfloop flow, removed 6 redundant places. [2023-09-01 12:28:38,883 INFO L231 Difference]: Finished difference. Result has 380 places, 613 transitions, 15208 flow [2023-09-01 12:28:38,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=13469, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=15208, PETRI_PLACES=380, PETRI_TRANSITIONS=613} [2023-09-01 12:28:38,884 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 360 predicate places. [2023-09-01 12:28:38,884 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 613 transitions, 15208 flow [2023-09-01 12:28:38,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 160.11764705882354) internal successors, (2722), 17 states have internal predecessors, (2722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:38,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:38,885 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:38,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:39,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-09-01 12:28:39,086 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:39,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:39,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1875827202, now seen corresponding path program 39 times [2023-09-01 12:28:39,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:39,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611265998] [2023-09-01 12:28:39,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:39,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:39,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:39,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611265998] [2023-09-01 12:28:39,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611265998] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:39,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678954869] [2023-09-01 12:28:39,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:28:39,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:39,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:39,433 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:39,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-09-01 12:28:39,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 12:28:39,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:39,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 12:28:39,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:39,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:39,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:39,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678954869] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:39,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:39,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-09-01 12:28:39,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873722073] [2023-09-01 12:28:39,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:39,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 12:28:39,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:39,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 12:28:39,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-09-01 12:28:40,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-09-01 12:28:40,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 613 transitions, 15208 flow. Second operand has 20 states, 20 states have (on average 162.9) internal successors, (3258), 20 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:40,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:40,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-09-01 12:28:40,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:41,390 INFO L130 PetriNetUnfolder]: 1572/3187 cut-off events. [2023-09-01 12:28:41,390 INFO L131 PetriNetUnfolder]: For 149767/149769 co-relation queries the response was YES. [2023-09-01 12:28:41,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35630 conditions, 3187 events. 1572/3187 cut-off events. For 149767/149769 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 23588 event pairs, 125 based on Foata normal form. 6/3188 useless extension candidates. Maximal degree in co-relation 35490. Up to 2651 conditions per place. [2023-09-01 12:28:41,437 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 560 selfloop transitions, 118 changer transitions 15/703 dead transitions. [2023-09-01 12:28:41,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 703 transitions, 18266 flow [2023-09-01 12:28:41,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:28:41,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:28:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1843 transitions. [2023-09-01 12:28:41,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4066637246248897 [2023-09-01 12:28:41,439 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1843 transitions. [2023-09-01 12:28:41,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1843 transitions. [2023-09-01 12:28:41,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:41,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1843 transitions. [2023-09-01 12:28:41,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 167.54545454545453) internal successors, (1843), 11 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:41,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:41,445 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:41,445 INFO L175 Difference]: Start difference. First operand has 380 places, 613 transitions, 15208 flow. Second operand 11 states and 1843 transitions. [2023-09-01 12:28:41,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 703 transitions, 18266 flow [2023-09-01 12:28:42,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 703 transitions, 17761 flow, removed 249 selfloop flow, removed 3 redundant places. [2023-09-01 12:28:42,527 INFO L231 Difference]: Finished difference. Result has 391 places, 645 transitions, 16081 flow [2023-09-01 12:28:42,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=14721, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16081, PETRI_PLACES=391, PETRI_TRANSITIONS=645} [2023-09-01 12:28:42,528 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 371 predicate places. [2023-09-01 12:28:42,528 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 645 transitions, 16081 flow [2023-09-01 12:28:42,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 162.9) internal successors, (3258), 20 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:42,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:42,529 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:42,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-09-01 12:28:42,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-09-01 12:28:42,730 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:42,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:42,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1336639400, now seen corresponding path program 40 times [2023-09-01 12:28:42,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:42,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081218177] [2023-09-01 12:28:42,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:42,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:43,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:43,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081218177] [2023-09-01 12:28:43,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081218177] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:43,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053956272] [2023-09-01 12:28:43,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:28:43,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:43,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:43,081 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:43,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-09-01 12:28:43,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:28:43,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:43,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 12:28:43,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:43,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:43,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:43,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053956272] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:43,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:43,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-09-01 12:28:43,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157071678] [2023-09-01 12:28:43,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:43,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 12:28:43,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:43,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 12:28:43,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-09-01 12:28:43,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-09-01 12:28:43,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 645 transitions, 16081 flow. Second operand has 17 states, 17 states have (on average 163.11764705882354) internal successors, (2773), 17 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:43,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:43,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-09-01 12:28:43,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:44,981 INFO L130 PetriNetUnfolder]: 1610/3255 cut-off events. [2023-09-01 12:28:44,981 INFO L131 PetriNetUnfolder]: For 156258/156260 co-relation queries the response was YES. [2023-09-01 12:28:45,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36511 conditions, 3255 events. 1610/3255 cut-off events. For 156258/156260 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 24094 event pairs, 125 based on Foata normal form. 4/3254 useless extension candidates. Maximal degree in co-relation 36366. Up to 2986 conditions per place. [2023-09-01 12:28:45,028 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 604 selfloop transitions, 76 changer transitions 6/696 dead transitions. [2023-09-01 12:28:45,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 696 transitions, 18224 flow [2023-09-01 12:28:45,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:28:45,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:28:45,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1503 transitions. [2023-09-01 12:28:45,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053398058252427 [2023-09-01 12:28:45,029 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1503 transitions. [2023-09-01 12:28:45,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1503 transitions. [2023-09-01 12:28:45,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:45,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1503 transitions. [2023-09-01 12:28:45,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 167.0) internal successors, (1503), 9 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:45,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:45,034 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:45,034 INFO L175 Difference]: Start difference. First operand has 391 places, 645 transitions, 16081 flow. Second operand 9 states and 1503 transitions. [2023-09-01 12:28:45,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 696 transitions, 18224 flow [2023-09-01 12:28:46,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 696 transitions, 17740 flow, removed 197 selfloop flow, removed 6 redundant places. [2023-09-01 12:28:46,107 INFO L231 Difference]: Finished difference. Result has 395 places, 666 transitions, 16436 flow [2023-09-01 12:28:46,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=15609, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16436, PETRI_PLACES=395, PETRI_TRANSITIONS=666} [2023-09-01 12:28:46,108 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 375 predicate places. [2023-09-01 12:28:46,108 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 666 transitions, 16436 flow [2023-09-01 12:28:46,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 163.11764705882354) internal successors, (2773), 17 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:46,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:46,108 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:46,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-09-01 12:28:46,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:46,309 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:46,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:46,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1766263854, now seen corresponding path program 41 times [2023-09-01 12:28:46,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:46,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226844531] [2023-09-01 12:28:46,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:46,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:46,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:46,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226844531] [2023-09-01 12:28:46,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226844531] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:46,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488947386] [2023-09-01 12:28:46,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:28:46,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:46,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:46,668 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:46,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-09-01 12:28:46,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 12:28:46,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:46,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 12:28:46,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:46,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:47,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488947386] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:47,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:47,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 17 [2023-09-01 12:28:47,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426892413] [2023-09-01 12:28:47,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:47,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 12:28:47,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:47,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 12:28:47,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-09-01 12:28:47,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-09-01 12:28:47,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 666 transitions, 16436 flow. Second operand has 19 states, 19 states have (on average 163.10526315789474) internal successors, (3099), 19 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:47,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:47,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-09-01 12:28:47,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:48,633 INFO L130 PetriNetUnfolder]: 1669/3389 cut-off events. [2023-09-01 12:28:48,633 INFO L131 PetriNetUnfolder]: For 146357/146359 co-relation queries the response was YES. [2023-09-01 12:28:48,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37004 conditions, 3389 events. 1669/3389 cut-off events. For 146357/146359 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 25388 event pairs, 128 based on Foata normal form. 5/3389 useless extension candidates. Maximal degree in co-relation 36858. Up to 3011 conditions per place. [2023-09-01 12:28:48,682 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 612 selfloop transitions, 101 changer transitions 7/730 dead transitions. [2023-09-01 12:28:48,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 730 transitions, 18849 flow [2023-09-01 12:28:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 12:28:48,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 12:28:48,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1347 transitions. [2023-09-01 12:28:48,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4086771844660194 [2023-09-01 12:28:48,684 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1347 transitions. [2023-09-01 12:28:48,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1347 transitions. [2023-09-01 12:28:48,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:48,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1347 transitions. [2023-09-01 12:28:48,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 168.375) internal successors, (1347), 8 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:48,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:48,687 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 412.0) internal successors, (3708), 9 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:48,687 INFO L175 Difference]: Start difference. First operand has 395 places, 666 transitions, 16436 flow. Second operand 8 states and 1347 transitions. [2023-09-01 12:28:48,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 730 transitions, 18849 flow [2023-09-01 12:28:49,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 730 transitions, 18501 flow, removed 125 selfloop flow, removed 5 redundant places. [2023-09-01 12:28:49,827 INFO L231 Difference]: Finished difference. Result has 399 places, 692 transitions, 17072 flow [2023-09-01 12:28:49,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=16094, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17072, PETRI_PLACES=399, PETRI_TRANSITIONS=692} [2023-09-01 12:28:49,828 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 379 predicate places. [2023-09-01 12:28:49,828 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 692 transitions, 17072 flow [2023-09-01 12:28:49,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 163.10526315789474) internal successors, (3099), 19 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:49,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:49,829 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:49,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-09-01 12:28:50,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:50,029 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:50,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:50,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1615598274, now seen corresponding path program 42 times [2023-09-01 12:28:50,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:50,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366060122] [2023-09-01 12:28:50,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:50,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:50,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:50,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366060122] [2023-09-01 12:28:50,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366060122] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:50,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087047046] [2023-09-01 12:28:50,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:28:50,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:50,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:50,325 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:50,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-09-01 12:28:50,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 12:28:50,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:50,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 12:28:50,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:50,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:50,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087047046] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:50,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:50,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 17 [2023-09-01 12:28:50,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081661753] [2023-09-01 12:28:50,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:50,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 12:28:50,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:50,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 12:28:50,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-09-01 12:28:50,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-09-01 12:28:50,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 692 transitions, 17072 flow. Second operand has 19 states, 19 states have (on average 163.0) internal successors, (3097), 19 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:50,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:50,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-09-01 12:28:50,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:52,265 INFO L130 PetriNetUnfolder]: 1664/3354 cut-off events. [2023-09-01 12:28:52,266 INFO L131 PetriNetUnfolder]: For 147446/147448 co-relation queries the response was YES. [2023-09-01 12:28:52,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36721 conditions, 3354 events. 1664/3354 cut-off events. For 147446/147448 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 24919 event pairs, 125 based on Foata normal form. 5/3354 useless extension candidates. Maximal degree in co-relation 36573. Up to 3011 conditions per place. [2023-09-01 12:28:52,311 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 610 selfloop transitions, 98 changer transitions 8/726 dead transitions. [2023-09-01 12:28:52,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 726 transitions, 18740 flow [2023-09-01 12:28:52,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:28:52,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:28:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1508 transitions. [2023-09-01 12:28:52,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40668824163969797 [2023-09-01 12:28:52,313 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1508 transitions. [2023-09-01 12:28:52,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1508 transitions. [2023-09-01 12:28:52,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:52,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1508 transitions. [2023-09-01 12:28:52,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 167.55555555555554) internal successors, (1508), 9 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:52,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:52,315 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:52,315 INFO L175 Difference]: Start difference. First operand has 399 places, 692 transitions, 17072 flow. Second operand 9 states and 1508 transitions. [2023-09-01 12:28:52,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 726 transitions, 18740 flow [2023-09-01 12:28:53,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 726 transitions, 18462 flow, removed 67 selfloop flow, removed 5 redundant places. [2023-09-01 12:28:53,435 INFO L231 Difference]: Finished difference. Result has 403 places, 692 transitions, 17068 flow [2023-09-01 12:28:53,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=16798, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17068, PETRI_PLACES=403, PETRI_TRANSITIONS=692} [2023-09-01 12:28:53,435 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 383 predicate places. [2023-09-01 12:28:53,435 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 692 transitions, 17068 flow [2023-09-01 12:28:53,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 163.0) internal successors, (3097), 19 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:53,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:53,436 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:53,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-09-01 12:28:53,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:53,637 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:53,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:53,637 INFO L85 PathProgramCache]: Analyzing trace with hash -210237672, now seen corresponding path program 43 times [2023-09-01 12:28:53,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:53,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644165511] [2023-09-01 12:28:53,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:53,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:53,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:53,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644165511] [2023-09-01 12:28:53,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644165511] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:53,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613719851] [2023-09-01 12:28:53,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:28:53,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:53,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:53,922 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:53,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-09-01 12:28:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:54,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 12:28:54,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:54,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:54,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613719851] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:54,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:54,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-09-01 12:28:54,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960953180] [2023-09-01 12:28:54,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:54,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 12:28:54,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:54,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 12:28:54,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:28:54,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-09-01 12:28:54,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 692 transitions, 17068 flow. Second operand has 18 states, 18 states have (on average 163.11111111111111) internal successors, (2936), 18 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:54,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:54,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-09-01 12:28:54,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:55,802 INFO L130 PetriNetUnfolder]: 1648/3305 cut-off events. [2023-09-01 12:28:55,802 INFO L131 PetriNetUnfolder]: For 144278/144280 co-relation queries the response was YES. [2023-09-01 12:28:55,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36316 conditions, 3305 events. 1648/3305 cut-off events. For 144278/144280 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 24310 event pairs, 127 based on Foata normal form. 4/3304 useless extension candidates. Maximal degree in co-relation 36167. Up to 2910 conditions per place. [2023-09-01 12:28:55,849 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 612 selfloop transitions, 116 changer transitions 5/743 dead transitions. [2023-09-01 12:28:55,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 743 transitions, 19087 flow [2023-09-01 12:28:55,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:28:55,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:28:55,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1840 transitions. [2023-09-01 12:28:55,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4060017652250662 [2023-09-01 12:28:55,851 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1840 transitions. [2023-09-01 12:28:55,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1840 transitions. [2023-09-01 12:28:55,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:55,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1840 transitions. [2023-09-01 12:28:55,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 167.27272727272728) internal successors, (1840), 11 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:55,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:55,854 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 412.0) internal successors, (4944), 12 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:55,854 INFO L175 Difference]: Start difference. First operand has 403 places, 692 transitions, 17068 flow. Second operand 11 states and 1840 transitions. [2023-09-01 12:28:55,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 743 transitions, 19087 flow [2023-09-01 12:28:56,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 743 transitions, 18935 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-09-01 12:28:57,007 INFO L231 Difference]: Finished difference. Result has 410 places, 702 transitions, 17441 flow [2023-09-01 12:28:57,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=16924, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17441, PETRI_PLACES=410, PETRI_TRANSITIONS=702} [2023-09-01 12:28:57,008 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 390 predicate places. [2023-09-01 12:28:57,008 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 702 transitions, 17441 flow [2023-09-01 12:28:57,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 163.11111111111111) internal successors, (2936), 18 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:57,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:28:57,008 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:28:57,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-09-01 12:28:57,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-09-01 12:28:57,209 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:28:57,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:28:57,209 INFO L85 PathProgramCache]: Analyzing trace with hash 639122522, now seen corresponding path program 44 times [2023-09-01 12:28:57,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:28:57,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235853965] [2023-09-01 12:28:57,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:28:57,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:28:57,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:28:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:57,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:28:57,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235853965] [2023-09-01 12:28:57,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235853965] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:28:57,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078928792] [2023-09-01 12:28:57,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:28:57,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:28:57,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:28:57,517 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:28:57,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-09-01 12:28:57,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:28:57,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:28:57,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-09-01 12:28:57,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:28:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:57,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:28:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:28:57,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078928792] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:28:57,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:28:57,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-09-01 12:28:57,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906036103] [2023-09-01 12:28:57,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:28:57,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 12:28:57,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:28:57,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 12:28:57,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-09-01 12:28:58,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 412 [2023-09-01 12:28:58,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 702 transitions, 17441 flow. Second operand has 20 states, 20 states have (on average 163.0) internal successors, (3260), 20 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:58,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:28:58,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 412 [2023-09-01 12:28:58,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:28:59,355 INFO L130 PetriNetUnfolder]: 1644/3278 cut-off events. [2023-09-01 12:28:59,355 INFO L131 PetriNetUnfolder]: For 145082/145084 co-relation queries the response was YES. [2023-09-01 12:28:59,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36336 conditions, 3278 events. 1644/3278 cut-off events. For 145082/145084 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 23893 event pairs, 134 based on Foata normal form. 3/3276 useless extension candidates. Maximal degree in co-relation 36185. Up to 2831 conditions per place. [2023-09-01 12:28:59,401 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 604 selfloop transitions, 119 changer transitions 5/738 dead transitions. [2023-09-01 12:28:59,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 738 transitions, 19267 flow [2023-09-01 12:28:59,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:28:59,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:28:59,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1511 transitions. [2023-09-01 12:28:59,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40749730312837107 [2023-09-01 12:28:59,402 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1511 transitions. [2023-09-01 12:28:59,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1511 transitions. [2023-09-01 12:28:59,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:28:59,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1511 transitions. [2023-09-01 12:28:59,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 167.88888888888889) internal successors, (1511), 9 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:59,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:59,405 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:28:59,405 INFO L175 Difference]: Start difference. First operand has 410 places, 702 transitions, 17441 flow. Second operand 9 states and 1511 transitions. [2023-09-01 12:28:59,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 738 transitions, 19267 flow [2023-09-01 12:29:00,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 738 transitions, 18983 flow, removed 42 selfloop flow, removed 8 redundant places. [2023-09-01 12:29:00,536 INFO L231 Difference]: Finished difference. Result has 412 places, 704 transitions, 17544 flow [2023-09-01 12:29:00,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=17163, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17544, PETRI_PLACES=412, PETRI_TRANSITIONS=704} [2023-09-01 12:29:00,537 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 392 predicate places. [2023-09-01 12:29:00,537 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 704 transitions, 17544 flow [2023-09-01 12:29:00,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 163.0) internal successors, (3260), 20 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:00,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:00,537 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:00,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-09-01 12:29:00,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-09-01 12:29:00,738 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:29:00,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:00,739 INFO L85 PathProgramCache]: Analyzing trace with hash 708283217, now seen corresponding path program 45 times [2023-09-01 12:29:00,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:00,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860294025] [2023-09-01 12:29:00,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:00,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:00,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:00,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860294025] [2023-09-01 12:29:00,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860294025] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:00,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876311119] [2023-09-01 12:29:00,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:29:00,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:00,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:00,801 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:29:00,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-09-01 12:29:00,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 12:29:00,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:29:00,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:29:00,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:00,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:00,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876311119] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:29:00,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:29:00,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-09-01 12:29:00,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703564682] [2023-09-01 12:29:00,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:29:00,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 12:29:00,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:00,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 12:29:00,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-09-01 12:29:01,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:29:01,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 704 transitions, 17544 flow. Second operand has 14 states, 14 states have (on average 171.21428571428572) internal successors, (2397), 14 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:01,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:01,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:29:01,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:02,561 INFO L130 PetriNetUnfolder]: 2101/4250 cut-off events. [2023-09-01 12:29:02,561 INFO L131 PetriNetUnfolder]: For 196854/196854 co-relation queries the response was YES. [2023-09-01 12:29:02,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46884 conditions, 4250 events. 2101/4250 cut-off events. For 196854/196854 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 32675 event pairs, 313 based on Foata normal form. 4/4254 useless extension candidates. Maximal degree in co-relation 46731. Up to 1463 conditions per place. [2023-09-01 12:29:02,617 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 549 selfloop transitions, 384 changer transitions 15/948 dead transitions. [2023-09-01 12:29:02,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 948 transitions, 25213 flow [2023-09-01 12:29:02,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 12:29:02,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 12:29:02,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2441 transitions. [2023-09-01 12:29:02,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42319694868238555 [2023-09-01 12:29:02,619 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2441 transitions. [2023-09-01 12:29:02,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2441 transitions. [2023-09-01 12:29:02,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:02,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2441 transitions. [2023-09-01 12:29:02,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 174.35714285714286) internal successors, (2441), 14 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:02,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:02,625 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:02,625 INFO L175 Difference]: Start difference. First operand has 412 places, 704 transitions, 17544 flow. Second operand 14 states and 2441 transitions. [2023-09-01 12:29:02,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 948 transitions, 25213 flow [2023-09-01 12:29:04,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 948 transitions, 24802 flow, removed 72 selfloop flow, removed 6 redundant places. [2023-09-01 12:29:04,165 INFO L231 Difference]: Finished difference. Result has 424 places, 845 transitions, 22362 flow [2023-09-01 12:29:04,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=17262, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=22362, PETRI_PLACES=424, PETRI_TRANSITIONS=845} [2023-09-01 12:29:04,166 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 404 predicate places. [2023-09-01 12:29:04,166 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 845 transitions, 22362 flow [2023-09-01 12:29:04,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 171.21428571428572) internal successors, (2397), 14 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:04,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:04,167 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:04,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-09-01 12:29:04,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-09-01 12:29:04,367 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:29:04,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:04,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1132772869, now seen corresponding path program 46 times [2023-09-01 12:29:04,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:04,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136181338] [2023-09-01 12:29:04,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:04,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:04,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:04,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136181338] [2023-09-01 12:29:04,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136181338] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:04,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23204226] [2023-09-01 12:29:04,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:29:04,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:04,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:04,436 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:29:04,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-09-01 12:29:04,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:29:04,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:29:04,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:29:04,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:04,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:04,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:04,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23204226] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:29:04,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:29:04,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-09-01 12:29:04,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948424717] [2023-09-01 12:29:04,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:29:04,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 12:29:04,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:04,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 12:29:04,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-09-01 12:29:04,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:29:04,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 845 transitions, 22362 flow. Second operand has 14 states, 14 states have (on average 171.07142857142858) internal successors, (2395), 14 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:04,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:04,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:29:04,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:06,429 INFO L130 PetriNetUnfolder]: 2208/4437 cut-off events. [2023-09-01 12:29:06,429 INFO L131 PetriNetUnfolder]: For 223350/223350 co-relation queries the response was YES. [2023-09-01 12:29:06,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50770 conditions, 4437 events. 2208/4437 cut-off events. For 223350/223350 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 34327 event pairs, 212 based on Foata normal form. 36/4473 useless extension candidates. Maximal degree in co-relation 50612. Up to 2556 conditions per place. [2023-09-01 12:29:06,498 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 707 selfloop transitions, 265 changer transitions 0/972 dead transitions. [2023-09-01 12:29:06,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 972 transitions, 27055 flow [2023-09-01 12:29:06,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:29:06,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:29:06,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1587 transitions. [2023-09-01 12:29:06,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279935275080906 [2023-09-01 12:29:06,500 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1587 transitions. [2023-09-01 12:29:06,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1587 transitions. [2023-09-01 12:29:06,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:06,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1587 transitions. [2023-09-01 12:29:06,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 176.33333333333334) internal successors, (1587), 9 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:06,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:06,503 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:06,503 INFO L175 Difference]: Start difference. First operand has 424 places, 845 transitions, 22362 flow. Second operand 9 states and 1587 transitions. [2023-09-01 12:29:06,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 972 transitions, 27055 flow [2023-09-01 12:29:08,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 972 transitions, 26120 flow, removed 283 selfloop flow, removed 9 redundant places. [2023-09-01 12:29:08,538 INFO L231 Difference]: Finished difference. Result has 424 places, 877 transitions, 23083 flow [2023-09-01 12:29:08,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=21430, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=23083, PETRI_PLACES=424, PETRI_TRANSITIONS=877} [2023-09-01 12:29:08,540 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 404 predicate places. [2023-09-01 12:29:08,540 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 877 transitions, 23083 flow [2023-09-01 12:29:08,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 171.07142857142858) internal successors, (2395), 14 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:08,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:08,540 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:08,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-09-01 12:29:08,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-09-01 12:29:08,741 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:29:08,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:08,742 INFO L85 PathProgramCache]: Analyzing trace with hash 991055867, now seen corresponding path program 47 times [2023-09-01 12:29:08,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:08,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211044413] [2023-09-01 12:29:08,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:08,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:08,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:08,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211044413] [2023-09-01 12:29:08,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211044413] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:08,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814823836] [2023-09-01 12:29:08,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:29:08,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:08,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:08,817 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:29:08,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-09-01 12:29:08,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 12:29:08,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:29:08,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:29:08,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:08,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:09,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814823836] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:29:09,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:29:09,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-09-01 12:29:09,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916830091] [2023-09-01 12:29:09,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:29:09,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 12:29:09,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:09,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 12:29:09,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-09-01 12:29:09,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:29:09,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 877 transitions, 23083 flow. Second operand has 15 states, 15 states have (on average 170.8) internal successors, (2562), 15 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:09,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:09,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:29:09,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:11,361 INFO L130 PetriNetUnfolder]: 2459/4964 cut-off events. [2023-09-01 12:29:11,361 INFO L131 PetriNetUnfolder]: For 250906/250906 co-relation queries the response was YES. [2023-09-01 12:29:11,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57350 conditions, 4964 events. 2459/4964 cut-off events. For 250906/250906 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 39471 event pairs, 182 based on Foata normal form. 62/5026 useless extension candidates. Maximal degree in co-relation 57192. Up to 3348 conditions per place. [2023-09-01 12:29:11,430 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 746 selfloop transitions, 307 changer transitions 0/1053 dead transitions. [2023-09-01 12:29:11,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 1053 transitions, 29281 flow [2023-09-01 12:29:11,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 12:29:11,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 12:29:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3863 transitions. [2023-09-01 12:29:11,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42619152691968226 [2023-09-01 12:29:11,432 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3863 transitions. [2023-09-01 12:29:11,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3863 transitions. [2023-09-01 12:29:11,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:11,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3863 transitions. [2023-09-01 12:29:11,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 175.5909090909091) internal successors, (3863), 22 states have internal predecessors, (3863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:11,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:11,438 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:11,438 INFO L175 Difference]: Start difference. First operand has 424 places, 877 transitions, 23083 flow. Second operand 22 states and 3863 transitions. [2023-09-01 12:29:11,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 1053 transitions, 29281 flow [2023-09-01 12:29:13,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1053 transitions, 28712 flow, removed 118 selfloop flow, removed 4 redundant places. [2023-09-01 12:29:13,462 INFO L231 Difference]: Finished difference. Result has 450 places, 951 transitions, 25904 flow [2023-09-01 12:29:13,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=22617, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=25904, PETRI_PLACES=450, PETRI_TRANSITIONS=951} [2023-09-01 12:29:13,463 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 430 predicate places. [2023-09-01 12:29:13,463 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 951 transitions, 25904 flow [2023-09-01 12:29:13,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.8) internal successors, (2562), 15 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:13,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:13,464 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:13,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-09-01 12:29:13,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-09-01 12:29:13,664 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:29:13,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:13,665 INFO L85 PathProgramCache]: Analyzing trace with hash -2067368727, now seen corresponding path program 48 times [2023-09-01 12:29:13,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:13,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712535276] [2023-09-01 12:29:13,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:13,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:13,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:13,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:13,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712535276] [2023-09-01 12:29:13,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712535276] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:13,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251224286] [2023-09-01 12:29:13,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:29:13,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:13,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:13,742 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:29:13,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-09-01 12:29:13,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 12:29:13,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:29:13,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:29:13,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:13,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:13,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:13,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251224286] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:29:13,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:29:13,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-09-01 12:29:13,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66326549] [2023-09-01 12:29:13,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:29:13,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 12:29:13,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:13,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 12:29:13,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-09-01 12:29:13,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:29:13,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 951 transitions, 25904 flow. Second operand has 16 states, 16 states have (on average 170.75) internal successors, (2732), 16 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:13,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:13,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:29:13,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:16,247 INFO L130 PetriNetUnfolder]: 2467/5022 cut-off events. [2023-09-01 12:29:16,247 INFO L131 PetriNetUnfolder]: For 269687/269687 co-relation queries the response was YES. [2023-09-01 12:29:16,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59757 conditions, 5022 events. 2467/5022 cut-off events. For 269687/269687 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 40318 event pairs, 391 based on Foata normal form. 24/5046 useless extension candidates. Maximal degree in co-relation 59590. Up to 2025 conditions per place. [2023-09-01 12:29:16,326 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 635 selfloop transitions, 451 changer transitions 12/1098 dead transitions. [2023-09-01 12:29:16,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 1098 transitions, 30772 flow [2023-09-01 12:29:16,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 12:29:16,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 12:29:16,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4525 transitions. [2023-09-01 12:29:16,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224234503360717 [2023-09-01 12:29:16,329 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4525 transitions. [2023-09-01 12:29:16,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4525 transitions. [2023-09-01 12:29:16,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:16,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4525 transitions. [2023-09-01 12:29:16,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 174.03846153846155) internal successors, (4525), 26 states have internal predecessors, (4525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:16,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:16,336 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:16,336 INFO L175 Difference]: Start difference. First operand has 450 places, 951 transitions, 25904 flow. Second operand 26 states and 4525 transitions. [2023-09-01 12:29:16,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 1098 transitions, 30772 flow [2023-09-01 12:29:18,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 1098 transitions, 29728 flow, removed 403 selfloop flow, removed 10 redundant places. [2023-09-01 12:29:18,896 INFO L231 Difference]: Finished difference. Result has 470 places, 964 transitions, 26544 flow [2023-09-01 12:29:18,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=24911, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=949, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=428, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=26544, PETRI_PLACES=470, PETRI_TRANSITIONS=964} [2023-09-01 12:29:18,897 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 450 predicate places. [2023-09-01 12:29:18,897 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 964 transitions, 26544 flow [2023-09-01 12:29:18,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 170.75) internal successors, (2732), 16 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:18,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:18,897 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:18,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-09-01 12:29:19,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-09-01 12:29:19,098 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:29:19,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:19,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1532439073, now seen corresponding path program 49 times [2023-09-01 12:29:19,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:19,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462024098] [2023-09-01 12:29:19,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:19,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:19,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:19,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462024098] [2023-09-01 12:29:19,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462024098] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:19,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260286882] [2023-09-01 12:29:19,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:29:19,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:19,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:19,170 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:29:19,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-09-01 12:29:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:19,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:29:19,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:19,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:19,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260286882] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:29:19,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:29:19,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-09-01 12:29:19,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292008315] [2023-09-01 12:29:19,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:29:19,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 12:29:19,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:19,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 12:29:19,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-09-01 12:29:19,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:29:19,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 964 transitions, 26544 flow. Second operand has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:19,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:19,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:29:19,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:22,063 INFO L130 PetriNetUnfolder]: 2712/5497 cut-off events. [2023-09-01 12:29:22,063 INFO L131 PetriNetUnfolder]: For 320330/320330 co-relation queries the response was YES. [2023-09-01 12:29:22,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66845 conditions, 5497 events. 2712/5497 cut-off events. For 320330/320330 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 44732 event pairs, 338 based on Foata normal form. 44/5541 useless extension candidates. Maximal degree in co-relation 66674. Up to 1774 conditions per place. [2023-09-01 12:29:22,151 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 653 selfloop transitions, 534 changer transitions 11/1198 dead transitions. [2023-09-01 12:29:22,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1198 transitions, 34181 flow [2023-09-01 12:29:22,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 12:29:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 12:29:22,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4707 transitions. [2023-09-01 12:29:22,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231391585760518 [2023-09-01 12:29:22,154 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4707 transitions. [2023-09-01 12:29:22,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4707 transitions. [2023-09-01 12:29:22,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:22,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4707 transitions. [2023-09-01 12:29:22,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 174.33333333333334) internal successors, (4707), 27 states have internal predecessors, (4707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:22,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 412.0) internal successors, (11536), 28 states have internal predecessors, (11536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:22,161 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 412.0) internal successors, (11536), 28 states have internal predecessors, (11536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:22,161 INFO L175 Difference]: Start difference. First operand has 470 places, 964 transitions, 26544 flow. Second operand 27 states and 4707 transitions. [2023-09-01 12:29:22,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1198 transitions, 34181 flow [2023-09-01 12:29:25,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 1198 transitions, 33264 flow, removed 132 selfloop flow, removed 14 redundant places. [2023-09-01 12:29:25,346 INFO L231 Difference]: Finished difference. Result has 485 places, 1027 transitions, 29279 flow [2023-09-01 12:29:25,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=25364, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=29279, PETRI_PLACES=485, PETRI_TRANSITIONS=1027} [2023-09-01 12:29:25,349 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 465 predicate places. [2023-09-01 12:29:25,349 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 1027 transitions, 29279 flow [2023-09-01 12:29:25,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:25,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:25,350 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:25,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-09-01 12:29:25,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:25,556 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:29:25,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:25,557 INFO L85 PathProgramCache]: Analyzing trace with hash 141695673, now seen corresponding path program 50 times [2023-09-01 12:29:25,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:25,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247135676] [2023-09-01 12:29:25,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:25,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:25,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:25,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247135676] [2023-09-01 12:29:25,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247135676] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:25,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859321933] [2023-09-01 12:29:25,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:29:25,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:25,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:25,625 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:29:25,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-09-01 12:29:25,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:29:25,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:29:25,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:29:25,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:25,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:25,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859321933] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:29:25,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:29:25,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-09-01 12:29:25,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946830987] [2023-09-01 12:29:25,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:29:25,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 12:29:25,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:25,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 12:29:25,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-09-01 12:29:25,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:29:25,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 1027 transitions, 29279 flow. Second operand has 15 states, 15 states have (on average 170.8) internal successors, (2562), 15 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:25,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:25,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:29:25,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:28,563 INFO L130 PetriNetUnfolder]: 2655/5348 cut-off events. [2023-09-01 12:29:28,563 INFO L131 PetriNetUnfolder]: For 315845/315845 co-relation queries the response was YES. [2023-09-01 12:29:28,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65883 conditions, 5348 events. 2655/5348 cut-off events. For 315845/315845 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 43038 event pairs, 66 based on Foata normal form. 20/5368 useless extension candidates. Maximal degree in co-relation 65710. Up to 1475 conditions per place. [2023-09-01 12:29:28,648 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 632 selfloop transitions, 495 changer transitions 5/1132 dead transitions. [2023-09-01 12:29:28,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 1132 transitions, 33907 flow [2023-09-01 12:29:28,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 12:29:28,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 12:29:28,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4869 transitions. [2023-09-01 12:29:28,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207004160887657 [2023-09-01 12:29:28,651 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4869 transitions. [2023-09-01 12:29:28,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4869 transitions. [2023-09-01 12:29:28,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:28,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4869 transitions. [2023-09-01 12:29:28,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 173.89285714285714) internal successors, (4869), 28 states have internal predecessors, (4869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:28,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 412.0) internal successors, (11948), 29 states have internal predecessors, (11948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:28,659 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 412.0) internal successors, (11948), 29 states have internal predecessors, (11948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:28,659 INFO L175 Difference]: Start difference. First operand has 485 places, 1027 transitions, 29279 flow. Second operand 28 states and 4869 transitions. [2023-09-01 12:29:28,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 1132 transitions, 33907 flow [2023-09-01 12:29:31,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 1132 transitions, 32686 flow, removed 397 selfloop flow, removed 15 redundant places. [2023-09-01 12:29:31,809 INFO L231 Difference]: Finished difference. Result has 499 places, 1044 transitions, 30195 flow [2023-09-01 12:29:31,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=27851, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=470, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=30195, PETRI_PLACES=499, PETRI_TRANSITIONS=1044} [2023-09-01 12:29:31,811 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 479 predicate places. [2023-09-01 12:29:31,811 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 1044 transitions, 30195 flow [2023-09-01 12:29:31,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.8) internal successors, (2562), 15 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:31,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:31,811 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:31,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-09-01 12:29:32,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:32,012 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:29:32,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:32,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1528904067, now seen corresponding path program 51 times [2023-09-01 12:29:32,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:32,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419127009] [2023-09-01 12:29:32,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:32,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:32,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:32,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419127009] [2023-09-01 12:29:32,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419127009] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:32,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069537827] [2023-09-01 12:29:32,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:29:32,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:32,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:32,089 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:29:32,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-09-01 12:29:32,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 12:29:32,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:29:32,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:29:32,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:32,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:32,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:32,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069537827] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:29:32,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:29:32,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-09-01 12:29:32,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376376476] [2023-09-01 12:29:32,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:29:32,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 12:29:32,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:32,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 12:29:32,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-09-01 12:29:32,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:29:32,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 1044 transitions, 30195 flow. Second operand has 15 states, 15 states have (on average 170.86666666666667) internal successors, (2563), 15 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:32,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:32,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:29:32,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:35,532 INFO L130 PetriNetUnfolder]: 2961/5996 cut-off events. [2023-09-01 12:29:35,533 INFO L131 PetriNetUnfolder]: For 380651/380651 co-relation queries the response was YES. [2023-09-01 12:29:35,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75386 conditions, 5996 events. 2961/5996 cut-off events. For 380651/380651 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 49302 event pairs, 550 based on Foata normal form. 36/6032 useless extension candidates. Maximal degree in co-relation 75210. Up to 2610 conditions per place. [2023-09-01 12:29:35,626 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 793 selfloop transitions, 491 changer transitions 1/1285 dead transitions. [2023-09-01 12:29:35,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 1285 transitions, 39499 flow [2023-09-01 12:29:35,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 12:29:35,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 12:29:35,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3849 transitions. [2023-09-01 12:29:35,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246469549867608 [2023-09-01 12:29:35,628 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3849 transitions. [2023-09-01 12:29:35,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3849 transitions. [2023-09-01 12:29:35,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:35,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3849 transitions. [2023-09-01 12:29:35,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 174.95454545454547) internal successors, (3849), 22 states have internal predecessors, (3849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:35,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:35,634 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:35,634 INFO L175 Difference]: Start difference. First operand has 499 places, 1044 transitions, 30195 flow. Second operand 22 states and 3849 transitions. [2023-09-01 12:29:35,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 1285 transitions, 39499 flow [2023-09-01 12:29:39,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 1285 transitions, 37168 flow, removed 750 selfloop flow, removed 13 redundant places. [2023-09-01 12:29:39,091 INFO L231 Difference]: Finished difference. Result has 513 places, 1128 transitions, 32628 flow [2023-09-01 12:29:39,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=28071, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1030, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=402, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=32628, PETRI_PLACES=513, PETRI_TRANSITIONS=1128} [2023-09-01 12:29:39,093 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 493 predicate places. [2023-09-01 12:29:39,093 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 1128 transitions, 32628 flow [2023-09-01 12:29:39,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.86666666666667) internal successors, (2563), 15 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:39,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:39,094 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:39,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-09-01 12:29:39,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:39,300 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:29:39,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:39,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1593843127, now seen corresponding path program 52 times [2023-09-01 12:29:39,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:39,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674647386] [2023-09-01 12:29:39,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:39,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:39,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:39,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674647386] [2023-09-01 12:29:39,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674647386] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:39,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342943310] [2023-09-01 12:29:39,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:29:39,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:39,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:39,362 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:29:39,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-09-01 12:29:39,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:29:39,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:29:39,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:29:39,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:39,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:39,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342943310] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:29:39,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:29:39,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-09-01 12:29:39,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191898371] [2023-09-01 12:29:39,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:29:39,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 12:29:39,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:39,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 12:29:39,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-09-01 12:29:39,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:29:39,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 1128 transitions, 32628 flow. Second operand has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:39,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:39,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:29:39,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:42,947 INFO L130 PetriNetUnfolder]: 2885/5874 cut-off events. [2023-09-01 12:29:42,947 INFO L131 PetriNetUnfolder]: For 355261/355261 co-relation queries the response was YES. [2023-09-01 12:29:43,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73058 conditions, 5874 events. 2885/5874 cut-off events. For 355261/355261 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 48233 event pairs, 326 based on Foata normal form. 64/5938 useless extension candidates. Maximal degree in co-relation 72878. Up to 1686 conditions per place. [2023-09-01 12:29:43,046 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 680 selfloop transitions, 604 changer transitions 12/1296 dead transitions. [2023-09-01 12:29:43,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 1296 transitions, 38795 flow [2023-09-01 12:29:43,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 12:29:43,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 12:29:43,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5396 transitions. [2023-09-01 12:29:43,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248668963357344 [2023-09-01 12:29:43,049 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5396 transitions. [2023-09-01 12:29:43,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5396 transitions. [2023-09-01 12:29:43,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:43,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5396 transitions. [2023-09-01 12:29:43,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 174.06451612903226) internal successors, (5396), 31 states have internal predecessors, (5396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:43,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:43,058 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:43,058 INFO L175 Difference]: Start difference. First operand has 513 places, 1128 transitions, 32628 flow. Second operand 31 states and 5396 transitions. [2023-09-01 12:29:43,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 1296 transitions, 38795 flow [2023-09-01 12:29:46,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 1296 transitions, 38048 flow, removed 293 selfloop flow, removed 10 redundant places. [2023-09-01 12:29:46,712 INFO L231 Difference]: Finished difference. Result has 533 places, 1126 transitions, 33730 flow [2023-09-01 12:29:46,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=31261, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=579, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=33730, PETRI_PLACES=533, PETRI_TRANSITIONS=1126} [2023-09-01 12:29:46,714 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 513 predicate places. [2023-09-01 12:29:46,714 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 1126 transitions, 33730 flow [2023-09-01 12:29:46,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:46,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:46,715 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:46,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-09-01 12:29:46,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-09-01 12:29:46,920 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:29:46,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:46,921 INFO L85 PathProgramCache]: Analyzing trace with hash 578571649, now seen corresponding path program 53 times [2023-09-01 12:29:46,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:46,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277233179] [2023-09-01 12:29:46,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:46,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:46,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:46,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277233179] [2023-09-01 12:29:46,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277233179] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:46,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420319430] [2023-09-01 12:29:46,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:29:46,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:46,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:46,998 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:29:47,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-09-01 12:29:47,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 12:29:47,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:29:47,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:29:47,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:47,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:47,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420319430] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:29:47,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:29:47,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-09-01 12:29:47,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734688677] [2023-09-01 12:29:47,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:29:47,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 12:29:47,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:47,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 12:29:47,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:29:47,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:29:47,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 1126 transitions, 33730 flow. Second operand has 18 states, 18 states have (on average 171.05555555555554) internal successors, (3079), 18 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:47,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:47,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:29:47,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:29:51,050 INFO L130 PetriNetUnfolder]: 3350/6697 cut-off events. [2023-09-01 12:29:51,050 INFO L131 PetriNetUnfolder]: For 413277/413277 co-relation queries the response was YES. [2023-09-01 12:29:51,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85488 conditions, 6697 events. 3350/6697 cut-off events. For 413277/413277 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 55449 event pairs, 288 based on Foata normal form. 78/6775 useless extension candidates. Maximal degree in co-relation 85306. Up to 5716 conditions per place. [2023-09-01 12:29:51,158 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1144 selfloop transitions, 226 changer transitions 0/1370 dead transitions. [2023-09-01 12:29:51,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 1370 transitions, 42462 flow [2023-09-01 12:29:51,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 12:29:51,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 12:29:51,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3512 transitions. [2023-09-01 12:29:51,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4262135922330097 [2023-09-01 12:29:51,161 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3512 transitions. [2023-09-01 12:29:51,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3512 transitions. [2023-09-01 12:29:51,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:29:51,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3512 transitions. [2023-09-01 12:29:51,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 175.6) internal successors, (3512), 20 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:51,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:51,167 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:51,167 INFO L175 Difference]: Start difference. First operand has 533 places, 1126 transitions, 33730 flow. Second operand 20 states and 3512 transitions. [2023-09-01 12:29:51,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 1370 transitions, 42462 flow [2023-09-01 12:29:55,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 1370 transitions, 41117 flow, removed 337 selfloop flow, removed 20 redundant places. [2023-09-01 12:29:55,768 INFO L231 Difference]: Finished difference. Result has 540 places, 1281 transitions, 37880 flow [2023-09-01 12:29:55,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=32406, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=966, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=37880, PETRI_PLACES=540, PETRI_TRANSITIONS=1281} [2023-09-01 12:29:55,769 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 520 predicate places. [2023-09-01 12:29:55,769 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 1281 transitions, 37880 flow [2023-09-01 12:29:55,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 171.05555555555554) internal successors, (3079), 18 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:55,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:29:55,770 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:29:55,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-09-01 12:29:55,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-09-01 12:29:55,973 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:29:55,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:29:55,973 INFO L85 PathProgramCache]: Analyzing trace with hash 240245433, now seen corresponding path program 54 times [2023-09-01 12:29:55,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:29:55,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568752838] [2023-09-01 12:29:55,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:29:55,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:29:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:29:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:56,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:29:56,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568752838] [2023-09-01 12:29:56,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568752838] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:29:56,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642293207] [2023-09-01 12:29:56,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:29:56,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:29:56,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:29:56,041 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:29:56,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-09-01 12:29:56,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 12:29:56,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:29:56,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:29:56,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:29:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:56,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:29:56,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:29:56,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642293207] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:29:56,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:29:56,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2023-09-01 12:29:56,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538318783] [2023-09-01 12:29:56,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:29:56,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 12:29:56,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:29:56,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 12:29:56,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-09-01 12:29:56,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:29:56,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 1281 transitions, 37880 flow. Second operand has 15 states, 15 states have (on average 170.86666666666667) internal successors, (2563), 15 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:29:56,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:29:56,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:29:56,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:30:00,874 INFO L130 PetriNetUnfolder]: 3832/7695 cut-off events. [2023-09-01 12:30:00,874 INFO L131 PetriNetUnfolder]: For 499496/499496 co-relation queries the response was YES. [2023-09-01 12:30:00,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99848 conditions, 7695 events. 3832/7695 cut-off events. For 499496/499496 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 65821 event pairs, 166 based on Foata normal form. 166/7861 useless extension candidates. Maximal degree in co-relation 99656. Up to 3135 conditions per place. [2023-09-01 12:30:01,010 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 879 selfloop transitions, 676 changer transitions 1/1556 dead transitions. [2023-09-01 12:30:01,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 1556 transitions, 49153 flow [2023-09-01 12:30:01,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 12:30:01,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 12:30:01,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4032 transitions. [2023-09-01 12:30:01,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254959898691431 [2023-09-01 12:30:01,014 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4032 transitions. [2023-09-01 12:30:01,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4032 transitions. [2023-09-01 12:30:01,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:30:01,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4032 transitions. [2023-09-01 12:30:01,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 175.30434782608697) internal successors, (4032), 23 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:01,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:01,021 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 412.0) internal successors, (9888), 24 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:01,021 INFO L175 Difference]: Start difference. First operand has 540 places, 1281 transitions, 37880 flow. Second operand 23 states and 4032 transitions. [2023-09-01 12:30:01,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 1556 transitions, 49153 flow [2023-09-01 12:30:06,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 1556 transitions, 48246 flow, removed 318 selfloop flow, removed 7 redundant places. [2023-09-01 12:30:06,801 INFO L231 Difference]: Finished difference. Result has 560 places, 1416 transitions, 44202 flow [2023-09-01 12:30:06,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=36719, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=542, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=44202, PETRI_PLACES=560, PETRI_TRANSITIONS=1416} [2023-09-01 12:30:06,802 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 540 predicate places. [2023-09-01 12:30:06,802 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 1416 transitions, 44202 flow [2023-09-01 12:30:06,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.86666666666667) internal successors, (2563), 15 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:06,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:30:06,803 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:30:06,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-09-01 12:30:07,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:30:07,003 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:30:07,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:30:07,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1169476999, now seen corresponding path program 55 times [2023-09-01 12:30:07,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:30:07,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411763729] [2023-09-01 12:30:07,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:30:07,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:30:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:30:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:07,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:30:07,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411763729] [2023-09-01 12:30:07,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411763729] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:30:07,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312612498] [2023-09-01 12:30:07,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:30:07,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:30:07,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:30:07,128 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:30:07,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-09-01 12:30:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:30:07,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:30:07,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:30:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:07,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:30:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:07,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312612498] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:30:07,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:30:07,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-09-01 12:30:07,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159321082] [2023-09-01 12:30:07,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:30:07,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 12:30:07,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:30:07,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 12:30:07,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-09-01 12:30:07,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:30:07,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 1416 transitions, 44202 flow. Second operand has 16 states, 16 states have (on average 170.75) internal successors, (2732), 16 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:07,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:30:07,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:30:07,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:30:12,219 INFO L130 PetriNetUnfolder]: 3871/7710 cut-off events. [2023-09-01 12:30:12,219 INFO L131 PetriNetUnfolder]: For 531496/531496 co-relation queries the response was YES. [2023-09-01 12:30:12,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103760 conditions, 7710 events. 3871/7710 cut-off events. For 531496/531496 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 65452 event pairs, 158 based on Foata normal form. 50/7760 useless extension candidates. Maximal degree in co-relation 103564. Up to 2496 conditions per place. [2023-09-01 12:30:12,447 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 739 selfloop transitions, 795 changer transitions 15/1549 dead transitions. [2023-09-01 12:30:12,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1549 transitions, 50834 flow [2023-09-01 12:30:12,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 12:30:12,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 12:30:12,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5380 transitions. [2023-09-01 12:30:12,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42123394926401503 [2023-09-01 12:30:12,451 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5380 transitions. [2023-09-01 12:30:12,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5380 transitions. [2023-09-01 12:30:12,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:30:12,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5380 transitions. [2023-09-01 12:30:12,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 173.5483870967742) internal successors, (5380), 31 states have internal predecessors, (5380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:12,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:12,462 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:12,462 INFO L175 Difference]: Start difference. First operand has 560 places, 1416 transitions, 44202 flow. Second operand 31 states and 5380 transitions. [2023-09-01 12:30:12,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1549 transitions, 50834 flow [2023-09-01 12:30:18,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 1549 transitions, 49512 flow, removed 413 selfloop flow, removed 16 redundant places. [2023-09-01 12:30:18,722 INFO L231 Difference]: Finished difference. Result has 580 places, 1443 transitions, 46817 flow [2023-09-01 12:30:18,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=42222, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=738, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=46817, PETRI_PLACES=580, PETRI_TRANSITIONS=1443} [2023-09-01 12:30:18,724 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 560 predicate places. [2023-09-01 12:30:18,724 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 1443 transitions, 46817 flow [2023-09-01 12:30:18,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 170.75) internal successors, (2732), 16 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:18,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:30:18,725 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:30:18,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-09-01 12:30:18,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:30:18,930 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:30:18,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:30:18,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1133843129, now seen corresponding path program 56 times [2023-09-01 12:30:18,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:30:18,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371375844] [2023-09-01 12:30:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:30:18,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:30:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:30:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:19,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:30:19,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371375844] [2023-09-01 12:30:19,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371375844] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:30:19,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264053875] [2023-09-01 12:30:19,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:30:19,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:30:19,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:30:19,001 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:30:19,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-09-01 12:30:19,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:30:19,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:30:19,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:30:19,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:30:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:19,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:30:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:19,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264053875] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:30:19,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:30:19,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-09-01 12:30:19,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664407850] [2023-09-01 12:30:19,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:30:19,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 12:30:19,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:30:19,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 12:30:19,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-09-01 12:30:19,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:30:19,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 1443 transitions, 46817 flow. Second operand has 20 states, 20 states have (on average 170.55) internal successors, (3411), 20 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:19,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:30:19,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:30:19,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:30:24,561 INFO L130 PetriNetUnfolder]: 4126/8265 cut-off events. [2023-09-01 12:30:24,561 INFO L131 PetriNetUnfolder]: For 609088/609088 co-relation queries the response was YES. [2023-09-01 12:30:24,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114945 conditions, 8265 events. 4126/8265 cut-off events. For 609088/609088 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 71258 event pairs, 180 based on Foata normal form. 40/8305 useless extension candidates. Maximal degree in co-relation 114748. Up to 2325 conditions per place. [2023-09-01 12:30:24,711 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 712 selfloop transitions, 916 changer transitions 20/1648 dead transitions. [2023-09-01 12:30:24,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 1648 transitions, 56577 flow [2023-09-01 12:30:24,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 12:30:24,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 12:30:24,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 5902 transitions. [2023-09-01 12:30:24,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42133066818960596 [2023-09-01 12:30:24,715 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 5902 transitions. [2023-09-01 12:30:24,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 5902 transitions. [2023-09-01 12:30:24,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:30:24,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 5902 transitions. [2023-09-01 12:30:24,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 173.58823529411765) internal successors, (5902), 34 states have internal predecessors, (5902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:24,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 412.0) internal successors, (14420), 35 states have internal predecessors, (14420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:24,724 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 412.0) internal successors, (14420), 35 states have internal predecessors, (14420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:24,725 INFO L175 Difference]: Start difference. First operand has 580 places, 1443 transitions, 46817 flow. Second operand 34 states and 5902 transitions. [2023-09-01 12:30:24,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 1648 transitions, 56577 flow [2023-09-01 12:30:33,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 1648 transitions, 55166 flow, removed 592 selfloop flow, removed 14 redundant places. [2023-09-01 12:30:33,261 INFO L231 Difference]: Finished difference. Result has 604 places, 1531 transitions, 52715 flow [2023-09-01 12:30:33,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=45212, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=829, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=52715, PETRI_PLACES=604, PETRI_TRANSITIONS=1531} [2023-09-01 12:30:33,262 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 584 predicate places. [2023-09-01 12:30:33,262 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 1531 transitions, 52715 flow [2023-09-01 12:30:33,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 170.55) internal successors, (3411), 20 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:33,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:30:33,263 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:30:33,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-09-01 12:30:33,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-09-01 12:30:33,465 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:30:33,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:30:33,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1710707121, now seen corresponding path program 57 times [2023-09-01 12:30:33,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:30:33,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000080241] [2023-09-01 12:30:33,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:30:33,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:30:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:30:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:33,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:30:33,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000080241] [2023-09-01 12:30:33,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000080241] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:30:33,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956041395] [2023-09-01 12:30:33,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:30:33,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:30:33,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:30:33,529 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:30:33,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-09-01 12:30:33,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 12:30:33,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:30:33,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:30:33,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:30:33,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:33,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:30:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:33,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956041395] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:30:33,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:30:33,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-09-01 12:30:33,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410235912] [2023-09-01 12:30:33,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:30:33,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 12:30:33,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:30:33,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 12:30:33,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-09-01 12:30:33,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:30:33,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 1531 transitions, 52715 flow. Second operand has 17 states, 17 states have (on average 170.94117647058823) internal successors, (2906), 17 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:33,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:30:33,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:30:33,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:30:40,719 INFO L130 PetriNetUnfolder]: 4921/9910 cut-off events. [2023-09-01 12:30:40,719 INFO L131 PetriNetUnfolder]: For 806267/806267 co-relation queries the response was YES. [2023-09-01 12:30:40,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143672 conditions, 9910 events. 4921/9910 cut-off events. For 806267/806267 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 88796 event pairs, 210 based on Foata normal form. 42/9952 useless extension candidates. Maximal degree in co-relation 143470. Up to 3017 conditions per place. [2023-09-01 12:30:40,899 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 946 selfloop transitions, 984 changer transitions 0/1930 dead transitions. [2023-09-01 12:30:40,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 1930 transitions, 70216 flow [2023-09-01 12:30:40,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 12:30:40,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 12:30:40,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4208 transitions. [2023-09-01 12:30:40,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255663430420712 [2023-09-01 12:30:40,901 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4208 transitions. [2023-09-01 12:30:40,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4208 transitions. [2023-09-01 12:30:40,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:30:40,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4208 transitions. [2023-09-01 12:30:40,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 175.33333333333334) internal successors, (4208), 24 states have internal predecessors, (4208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:40,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 412.0) internal successors, (10300), 25 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:40,908 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 412.0) internal successors, (10300), 25 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:40,908 INFO L175 Difference]: Start difference. First operand has 604 places, 1531 transitions, 52715 flow. Second operand 24 states and 4208 transitions. [2023-09-01 12:30:40,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 1930 transitions, 70216 flow [2023-09-01 12:30:53,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 607 places, 1930 transitions, 68114 flow, removed 886 selfloop flow, removed 14 redundant places. [2023-09-01 12:30:53,334 INFO L231 Difference]: Finished difference. Result has 614 places, 1764 transitions, 63542 flow [2023-09-01 12:30:53,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=50405, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=770, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=63542, PETRI_PLACES=614, PETRI_TRANSITIONS=1764} [2023-09-01 12:30:53,336 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 594 predicate places. [2023-09-01 12:30:53,336 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 1764 transitions, 63542 flow [2023-09-01 12:30:53,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 170.94117647058823) internal successors, (2906), 17 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:53,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:30:53,336 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:30:53,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-09-01 12:30:53,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-09-01 12:30:53,537 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:30:53,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:30:53,537 INFO L85 PathProgramCache]: Analyzing trace with hash 695910137, now seen corresponding path program 58 times [2023-09-01 12:30:53,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:30:53,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730425349] [2023-09-01 12:30:53,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:30:53,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:30:53,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:30:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:53,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:30:53,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730425349] [2023-09-01 12:30:53,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730425349] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:30:53,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306578139] [2023-09-01 12:30:53,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:30:53,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:30:53,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:30:53,607 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:30:53,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-09-01 12:30:53,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:30:53,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:30:53,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:30:53,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:30:53,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:53,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:30:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:30:53,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306578139] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:30:53,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:30:53,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-09-01 12:30:53,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333073939] [2023-09-01 12:30:53,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:30:53,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 12:30:53,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:30:53,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 12:30:53,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-09-01 12:30:53,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:30:53,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 1764 transitions, 63542 flow. Second operand has 14 states, 14 states have (on average 170.85714285714286) internal successors, (2392), 14 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:30:53,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:30:53,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:30:53,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:31:01,490 INFO L130 PetriNetUnfolder]: 5132/10371 cut-off events. [2023-09-01 12:31:01,490 INFO L131 PetriNetUnfolder]: For 847197/847197 co-relation queries the response was YES. [2023-09-01 12:31:01,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151560 conditions, 10371 events. 5132/10371 cut-off events. For 847197/847197 co-relation queries the response was YES. Maximal size of possible extension queue 903. Compared 93994 event pairs, 866 based on Foata normal form. 2/10373 useless extension candidates. Maximal degree in co-relation 151352. Up to 5072 conditions per place. [2023-09-01 12:31:01,685 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1206 selfloop transitions, 681 changer transitions 7/1894 dead transitions. [2023-09-01 12:31:01,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 1894 transitions, 70985 flow [2023-09-01 12:31:01,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 12:31:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 12:31:01,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2431 transitions. [2023-09-01 12:31:01,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4214632454923717 [2023-09-01 12:31:01,687 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2431 transitions. [2023-09-01 12:31:01,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2431 transitions. [2023-09-01 12:31:01,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:31:01,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2431 transitions. [2023-09-01 12:31:01,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 173.64285714285714) internal successors, (2431), 14 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:31:01,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:31:01,691 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 412.0) internal successors, (6180), 15 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:31:01,691 INFO L175 Difference]: Start difference. First operand has 614 places, 1764 transitions, 63542 flow. Second operand 14 states and 2431 transitions. [2023-09-01 12:31:01,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 1894 transitions, 70985 flow [2023-09-01 12:31:15,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 1894 transitions, 69549 flow, removed 603 selfloop flow, removed 12 redundant places. [2023-09-01 12:31:15,439 INFO L231 Difference]: Finished difference. Result has 621 places, 1839 transitions, 66647 flow [2023-09-01 12:31:15,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=62147, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=605, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=66647, PETRI_PLACES=621, PETRI_TRANSITIONS=1839} [2023-09-01 12:31:15,440 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 601 predicate places. [2023-09-01 12:31:15,440 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 1839 transitions, 66647 flow [2023-09-01 12:31:15,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 170.85714285714286) internal successors, (2392), 14 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:31:15,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:31:15,441 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:31:15,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-09-01 12:31:15,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:31:15,641 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:31:15,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:31:15,642 INFO L85 PathProgramCache]: Analyzing trace with hash 644662819, now seen corresponding path program 59 times [2023-09-01 12:31:15,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:31:15,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142609129] [2023-09-01 12:31:15,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:31:15,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:31:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:31:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:31:15,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:31:15,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142609129] [2023-09-01 12:31:15,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142609129] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:31:15,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217838842] [2023-09-01 12:31:15,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:31:15,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:31:15,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:31:15,703 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:31:15,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-09-01 12:31:15,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 12:31:15,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:31:15,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:31:15,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:31:15,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:31:15,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:31:15,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:31:15,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217838842] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:31:15,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:31:15,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-09-01 12:31:15,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173573238] [2023-09-01 12:31:15,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:31:15,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 12:31:15,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:31:15,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 12:31:15,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-09-01 12:31:15,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:31:15,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 1839 transitions, 66647 flow. Second operand has 14 states, 14 states have (on average 170.85714285714286) internal successors, (2392), 14 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:31:15,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:31:15,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:31:15,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:31:24,604 INFO L130 PetriNetUnfolder]: 5258/10573 cut-off events. [2023-09-01 12:31:24,605 INFO L131 PetriNetUnfolder]: For 821197/821197 co-relation queries the response was YES. [2023-09-01 12:31:24,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154480 conditions, 10573 events. 5258/10573 cut-off events. For 821197/821197 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 95639 event pairs, 221 based on Foata normal form. 30/10603 useless extension candidates. Maximal degree in co-relation 154268. Up to 7874 conditions per place. [2023-09-01 12:31:24,831 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 1433 selfloop transitions, 517 changer transitions 0/1950 dead transitions. [2023-09-01 12:31:24,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 1950 transitions, 73556 flow [2023-09-01 12:31:24,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:31:24,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:31:24,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1579 transitions. [2023-09-01 12:31:24,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42583603020496225 [2023-09-01 12:31:24,833 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1579 transitions. [2023-09-01 12:31:24,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1579 transitions. [2023-09-01 12:31:24,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:31:24,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1579 transitions. [2023-09-01 12:31:24,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 175.44444444444446) internal successors, (1579), 9 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:31:24,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:31:24,836 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 412.0) internal successors, (4120), 10 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:31:24,836 INFO L175 Difference]: Start difference. First operand has 621 places, 1839 transitions, 66647 flow. Second operand 9 states and 1579 transitions. [2023-09-01 12:31:24,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 1950 transitions, 73556 flow [2023-09-01 12:31:38,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 1950 transitions, 72812 flow, removed 121 selfloop flow, removed 9 redundant places. [2023-09-01 12:31:39,025 INFO L231 Difference]: Finished difference. Result has 621 places, 1888 transitions, 68972 flow [2023-09-01 12:31:39,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=65904, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=68972, PETRI_PLACES=621, PETRI_TRANSITIONS=1888} [2023-09-01 12:31:39,027 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 601 predicate places. [2023-09-01 12:31:39,027 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 1888 transitions, 68972 flow [2023-09-01 12:31:39,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 170.85714285714286) internal successors, (2392), 14 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:31:39,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:31:39,028 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:31:39,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-09-01 12:31:39,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-09-01 12:31:39,228 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:31:39,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:31:39,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2004137547, now seen corresponding path program 60 times [2023-09-01 12:31:39,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:31:39,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064396022] [2023-09-01 12:31:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:31:39,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:31:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:31:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:31:39,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:31:39,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064396022] [2023-09-01 12:31:39,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064396022] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:31:39,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821699893] [2023-09-01 12:31:39,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:31:39,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:31:39,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:31:39,296 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:31:39,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-09-01 12:31:39,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 12:31:39,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:31:39,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:31:39,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:31:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:31:39,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:31:39,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:31:39,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821699893] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:31:39,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:31:39,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 16 [2023-09-01 12:31:39,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43794347] [2023-09-01 12:31:39,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:31:39,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 12:31:39,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:31:39,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 12:31:39,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-09-01 12:31:39,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:31:39,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 1888 transitions, 68972 flow. Second operand has 16 states, 16 states have (on average 170.8125) internal successors, (2733), 16 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:31:39,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:31:39,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:31:39,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:31:48,397 INFO L130 PetriNetUnfolder]: 5548/11175 cut-off events. [2023-09-01 12:31:48,397 INFO L131 PetriNetUnfolder]: For 880610/880610 co-relation queries the response was YES. [2023-09-01 12:31:48,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164192 conditions, 11175 events. 5548/11175 cut-off events. For 880610/880610 co-relation queries the response was YES. Maximal size of possible extension queue 980. Compared 102302 event pairs, 795 based on Foata normal form. 16/11191 useless extension candidates. Maximal degree in co-relation 163980. Up to 3253 conditions per place. [2023-09-01 12:31:48,606 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1261 selfloop transitions, 825 changer transitions 10/2096 dead transitions. [2023-09-01 12:31:48,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 644 places, 2096 transitions, 78971 flow [2023-09-01 12:31:48,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 12:31:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 12:31:48,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4177 transitions. [2023-09-01 12:31:48,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42243122977346276 [2023-09-01 12:31:48,608 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4177 transitions. [2023-09-01 12:31:48,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4177 transitions. [2023-09-01 12:31:48,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:31:48,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4177 transitions. [2023-09-01 12:31:48,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 174.04166666666666) internal successors, (4177), 24 states have internal predecessors, (4177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:31:48,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 412.0) internal successors, (10300), 25 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:31:48,615 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 412.0) internal successors, (10300), 25 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:31:48,615 INFO L175 Difference]: Start difference. First operand has 621 places, 1888 transitions, 68972 flow. Second operand 24 states and 4177 transitions. [2023-09-01 12:31:48,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 644 places, 2096 transitions, 78971 flow [2023-09-01 12:32:05,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 640 places, 2096 transitions, 78314 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-09-01 12:32:05,090 INFO L231 Difference]: Finished difference. Result has 648 places, 1982 transitions, 74899 flow [2023-09-01 12:32:05,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=68185, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=721, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1090, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=74899, PETRI_PLACES=648, PETRI_TRANSITIONS=1982} [2023-09-01 12:32:05,092 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 628 predicate places. [2023-09-01 12:32:05,092 INFO L495 AbstractCegarLoop]: Abstraction has has 648 places, 1982 transitions, 74899 flow [2023-09-01 12:32:05,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 170.8125) internal successors, (2733), 16 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:32:05,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:32:05,093 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:32:05,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-09-01 12:32:05,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:32:05,297 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:32:05,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:32:05,297 INFO L85 PathProgramCache]: Analyzing trace with hash 2099469555, now seen corresponding path program 61 times [2023-09-01 12:32:05,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:32:05,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000311653] [2023-09-01 12:32:05,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:32:05,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:32:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:32:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:32:05,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:32:05,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000311653] [2023-09-01 12:32:05,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000311653] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:32:05,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330826503] [2023-09-01 12:32:05,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:32:05,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:32:05,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:32:05,360 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:32:05,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-09-01 12:32:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:32:05,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:32:05,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:32:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:32:05,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:32:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:32:05,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330826503] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:32:05,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:32:05,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-09-01 12:32:05,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908288459] [2023-09-01 12:32:05,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:32:05,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 12:32:05,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:32:05,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 12:32:05,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:32:05,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:32:05,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 648 places, 1982 transitions, 74899 flow. Second operand has 18 states, 18 states have (on average 170.66666666666666) internal successors, (3072), 18 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:32:05,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:32:05,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:32:05,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:32:15,627 INFO L130 PetriNetUnfolder]: 5625/11332 cut-off events. [2023-09-01 12:32:15,628 INFO L131 PetriNetUnfolder]: For 987381/987381 co-relation queries the response was YES. [2023-09-01 12:32:15,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172202 conditions, 11332 events. 5625/11332 cut-off events. For 987381/987381 co-relation queries the response was YES. Maximal size of possible extension queue 1004. Compared 103934 event pairs, 833 based on Foata normal form. 8/11340 useless extension candidates. Maximal degree in co-relation 171982. Up to 3527 conditions per place. [2023-09-01 12:32:15,853 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1284 selfloop transitions, 835 changer transitions 8/2127 dead transitions. [2023-09-01 12:32:15,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 679 places, 2127 transitions, 83076 flow [2023-09-01 12:32:15,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 12:32:15,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 12:32:15,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5554 transitions. [2023-09-01 12:32:15,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212682038834951 [2023-09-01 12:32:15,856 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5554 transitions. [2023-09-01 12:32:15,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5554 transitions. [2023-09-01 12:32:15,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:32:15,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5554 transitions. [2023-09-01 12:32:15,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 173.5625) internal successors, (5554), 32 states have internal predecessors, (5554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:32:15,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 412.0) internal successors, (13596), 33 states have internal predecessors, (13596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:32:15,864 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 412.0) internal successors, (13596), 33 states have internal predecessors, (13596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:32:15,864 INFO L175 Difference]: Start difference. First operand has 648 places, 1982 transitions, 74899 flow. Second operand 32 states and 5554 transitions. [2023-09-01 12:32:15,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 679 places, 2127 transitions, 83076 flow [2023-09-01 12:32:34,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 2127 transitions, 81458 flow, removed 723 selfloop flow, removed 10 redundant places. [2023-09-01 12:32:34,899 INFO L231 Difference]: Finished difference. Result has 676 places, 2029 transitions, 78721 flow [2023-09-01 12:32:34,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=73772, PETRI_DIFFERENCE_MINUEND_PLACES=638, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1980, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=782, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=78721, PETRI_PLACES=676, PETRI_TRANSITIONS=2029} [2023-09-01 12:32:34,901 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 656 predicate places. [2023-09-01 12:32:34,901 INFO L495 AbstractCegarLoop]: Abstraction has has 676 places, 2029 transitions, 78721 flow [2023-09-01 12:32:34,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 170.66666666666666) internal successors, (3072), 18 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:32:34,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:32:34,901 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:32:34,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-09-01 12:32:35,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:32:35,102 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:32:35,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:32:35,102 INFO L85 PathProgramCache]: Analyzing trace with hash -265543753, now seen corresponding path program 62 times [2023-09-01 12:32:35,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:32:35,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526788847] [2023-09-01 12:32:35,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:32:35,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:32:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:32:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:32:35,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:32:35,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526788847] [2023-09-01 12:32:35,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526788847] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:32:35,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46314542] [2023-09-01 12:32:35,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:32:35,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:32:35,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:32:35,161 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:32:35,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-09-01 12:32:35,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:32:35,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:32:35,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:32:35,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:32:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:32:35,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:32:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 12:32:35,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46314542] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:32:35,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:32:35,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 15 [2023-09-01 12:32:35,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010384299] [2023-09-01 12:32:35,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:32:35,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 12:32:35,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:32:35,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 12:32:35,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-09-01 12:32:35,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:32:35,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 676 places, 2029 transitions, 78721 flow. Second operand has 15 states, 15 states have (on average 171.0) internal successors, (2565), 15 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:32:35,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:32:35,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:32:35,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:32:45,727 INFO L130 PetriNetUnfolder]: 5655/11394 cut-off events. [2023-09-01 12:32:45,727 INFO L131 PetriNetUnfolder]: For 1054436/1054436 co-relation queries the response was YES. [2023-09-01 12:32:45,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176386 conditions, 11394 events. 5655/11394 cut-off events. For 1054436/1054436 co-relation queries the response was YES. Maximal size of possible extension queue 1013. Compared 104754 event pairs, 2166 based on Foata normal form. 62/11456 useless extension candidates. Maximal degree in co-relation 176160. Up to 10806 conditions per place. [2023-09-01 12:32:45,959 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1979 selfloop transitions, 118 changer transitions 2/2099 dead transitions. [2023-09-01 12:32:45,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 2099 transitions, 84431 flow [2023-09-01 12:32:45,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 12:32:45,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 12:32:45,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2803 transitions. [2023-09-01 12:32:45,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252123786407767 [2023-09-01 12:32:45,962 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2803 transitions. [2023-09-01 12:32:45,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2803 transitions. [2023-09-01 12:32:45,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:32:45,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2803 transitions. [2023-09-01 12:32:45,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 175.1875) internal successors, (2803), 16 states have internal predecessors, (2803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:32:45,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 412.0) internal successors, (7004), 17 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:32:45,967 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 412.0) internal successors, (7004), 17 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:32:45,967 INFO L175 Difference]: Start difference. First operand has 676 places, 2029 transitions, 78721 flow. Second operand 16 states and 2803 transitions. [2023-09-01 12:32:45,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 2099 transitions, 84431 flow [2023-09-01 12:33:07,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 2099 transitions, 82952 flow, removed 499 selfloop flow, removed 16 redundant places. [2023-09-01 12:33:07,104 INFO L231 Difference]: Finished difference. Result has 678 places, 2036 transitions, 77993 flow [2023-09-01 12:33:07,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=77045, PETRI_DIFFERENCE_MINUEND_PLACES=658, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1899, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=77993, PETRI_PLACES=678, PETRI_TRANSITIONS=2036} [2023-09-01 12:33:07,105 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 658 predicate places. [2023-09-01 12:33:07,106 INFO L495 AbstractCegarLoop]: Abstraction has has 678 places, 2036 transitions, 77993 flow [2023-09-01 12:33:07,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 171.0) internal successors, (2565), 15 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:33:07,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:33:07,106 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:33:07,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-09-01 12:33:07,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2023-09-01 12:33:07,309 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:33:07,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:33:07,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1180036555, now seen corresponding path program 63 times [2023-09-01 12:33:07,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:33:07,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062919664] [2023-09-01 12:33:07,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:33:07,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:33:07,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:33:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:33:07,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:33:07,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062919664] [2023-09-01 12:33:07,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062919664] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:33:07,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189666528] [2023-09-01 12:33:07,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:33:07,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:33:07,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:33:07,371 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:33:07,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-09-01 12:33:07,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 12:33:07,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:33:07,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:33:07,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:33:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:33:07,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:33:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:33:07,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189666528] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:33:07,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:33:07,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-09-01 12:33:07,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579113443] [2023-09-01 12:33:07,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:33:07,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 12:33:07,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:33:07,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 12:33:07,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-09-01 12:33:07,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:33:07,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 678 places, 2036 transitions, 77993 flow. Second operand has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:33:07,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:33:07,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:33:07,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:33:18,021 INFO L130 PetriNetUnfolder]: 5740/11503 cut-off events. [2023-09-01 12:33:18,021 INFO L131 PetriNetUnfolder]: For 1078291/1078291 co-relation queries the response was YES. [2023-09-01 12:33:18,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178113 conditions, 11503 events. 5740/11503 cut-off events. For 1078291/1078291 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 105191 event pairs, 511 based on Foata normal form. 86/11589 useless extension candidates. Maximal degree in co-relation 177882. Up to 9927 conditions per place. [2023-09-01 12:33:18,333 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1806 selfloop transitions, 360 changer transitions 2/2168 dead transitions. [2023-09-01 12:33:18,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 2168 transitions, 86315 flow [2023-09-01 12:33:18,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 12:33:18,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 12:33:18,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3659 transitions. [2023-09-01 12:33:18,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229079981507166 [2023-09-01 12:33:18,335 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3659 transitions. [2023-09-01 12:33:18,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3659 transitions. [2023-09-01 12:33:18,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:33:18,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3659 transitions. [2023-09-01 12:33:18,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 174.23809523809524) internal successors, (3659), 21 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:33:18,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 412.0) internal successors, (9064), 22 states have internal predecessors, (9064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:33:18,341 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 412.0) internal successors, (9064), 22 states have internal predecessors, (9064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:33:18,341 INFO L175 Difference]: Start difference. First operand has 678 places, 2036 transitions, 77993 flow. Second operand 21 states and 3659 transitions. [2023-09-01 12:33:18,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 2168 transitions, 86315 flow [2023-09-01 12:33:39,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 693 places, 2168 transitions, 86022 flow, removed 93 selfloop flow, removed 5 redundant places. [2023-09-01 12:33:39,836 INFO L231 Difference]: Finished difference. Result has 699 places, 2087 transitions, 80552 flow [2023-09-01 12:33:39,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=77216, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=80552, PETRI_PLACES=699, PETRI_TRANSITIONS=2087} [2023-09-01 12:33:39,837 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 679 predicate places. [2023-09-01 12:33:39,837 INFO L495 AbstractCegarLoop]: Abstraction has has 699 places, 2087 transitions, 80552 flow [2023-09-01 12:33:39,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 170.93333333333334) internal successors, (2564), 15 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:33:39,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:33:39,837 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:33:39,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-09-01 12:33:40,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:33:40,041 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:33:40,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:33:40,041 INFO L85 PathProgramCache]: Analyzing trace with hash -458574299, now seen corresponding path program 64 times [2023-09-01 12:33:40,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:33:40,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284052119] [2023-09-01 12:33:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:33:40,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:33:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:33:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:33:40,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:33:40,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284052119] [2023-09-01 12:33:40,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284052119] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:33:40,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414817577] [2023-09-01 12:33:40,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:33:40,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:33:40,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:33:40,108 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:33:40,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-09-01 12:33:40,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:33:40,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:33:40,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:33:40,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:33:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:33:40,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:33:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:33:40,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414817577] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:33:40,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:33:40,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-09-01 12:33:40,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844871317] [2023-09-01 12:33:40,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:33:40,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 12:33:40,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:33:40,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 12:33:40,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-09-01 12:33:40,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:33:40,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 699 places, 2087 transitions, 80552 flow. Second operand has 16 states, 16 states have (on average 170.75) internal successors, (2732), 16 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:33:40,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:33:40,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:33:40,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:33:50,873 INFO L130 PetriNetUnfolder]: 5736/11503 cut-off events. [2023-09-01 12:33:50,873 INFO L131 PetriNetUnfolder]: For 1065756/1065756 co-relation queries the response was YES. [2023-09-01 12:33:51,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179587 conditions, 11503 events. 5736/11503 cut-off events. For 1065756/1065756 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 105621 event pairs, 828 based on Foata normal form. 4/11507 useless extension candidates. Maximal degree in co-relation 179350. Up to 3646 conditions per place. [2023-09-01 12:33:51,128 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1267 selfloop transitions, 893 changer transitions 4/2164 dead transitions. [2023-09-01 12:33:51,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 2164 transitions, 86025 flow [2023-09-01 12:33:51,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 12:33:51,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 12:33:51,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4514 transitions. [2023-09-01 12:33:51,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4213965646004481 [2023-09-01 12:33:51,131 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4514 transitions. [2023-09-01 12:33:51,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4514 transitions. [2023-09-01 12:33:51,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:33:51,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4514 transitions. [2023-09-01 12:33:51,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 173.6153846153846) internal successors, (4514), 26 states have internal predecessors, (4514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:33:51,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:33:51,142 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:33:51,142 INFO L175 Difference]: Start difference. First operand has 699 places, 2087 transitions, 80552 flow. Second operand 26 states and 4514 transitions. [2023-09-01 12:33:51,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 2164 transitions, 86025 flow [2023-09-01 12:34:13,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 714 places, 2164 transitions, 85344 flow, removed 287 selfloop flow, removed 10 redundant places. [2023-09-01 12:34:13,641 INFO L231 Difference]: Finished difference. Result has 717 places, 2087 transitions, 81886 flow [2023-09-01 12:34:13,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=79851, PETRI_DIFFERENCE_MINUEND_PLACES=689, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2086, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=890, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=81886, PETRI_PLACES=717, PETRI_TRANSITIONS=2087} [2023-09-01 12:34:13,642 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 697 predicate places. [2023-09-01 12:34:13,642 INFO L495 AbstractCegarLoop]: Abstraction has has 717 places, 2087 transitions, 81886 flow [2023-09-01 12:34:13,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 170.75) internal successors, (2732), 16 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:34:13,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:34:13,643 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:34:13,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-09-01 12:34:13,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:34:13,845 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:34:13,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:34:13,845 INFO L85 PathProgramCache]: Analyzing trace with hash 546172837, now seen corresponding path program 65 times [2023-09-01 12:34:13,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:34:13,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167077520] [2023-09-01 12:34:13,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:34:13,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:34:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:34:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:34:13,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:34:13,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167077520] [2023-09-01 12:34:13,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167077520] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:34:13,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586778273] [2023-09-01 12:34:13,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:34:13,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:34:13,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:34:13,909 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:34:13,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-09-01 12:34:14,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 12:34:14,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:34:14,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:34:14,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:34:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:34:14,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:34:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:34:14,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586778273] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:34:14,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:34:14,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-09-01 12:34:14,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744764935] [2023-09-01 12:34:14,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:34:14,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 12:34:14,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:34:14,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 12:34:14,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-09-01 12:34:14,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:34:14,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 717 places, 2087 transitions, 81886 flow. Second operand has 17 states, 17 states have (on average 170.76470588235293) internal successors, (2903), 17 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:34:14,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:34:14,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:34:14,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:34:26,429 INFO L130 PetriNetUnfolder]: 6210/12485 cut-off events. [2023-09-01 12:34:26,429 INFO L131 PetriNetUnfolder]: For 1273021/1273021 co-relation queries the response was YES. [2023-09-01 12:34:26,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199106 conditions, 12485 events. 6210/12485 cut-off events. For 1273021/1273021 co-relation queries the response was YES. Maximal size of possible extension queue 1132. Compared 116022 event pairs, 971 based on Foata normal form. 28/12513 useless extension candidates. Maximal degree in co-relation 198866. Up to 3941 conditions per place. [2023-09-01 12:34:26,707 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1474 selfloop transitions, 894 changer transitions 6/2374 dead transitions. [2023-09-01 12:34:26,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 741 places, 2374 transitions, 95973 flow [2023-09-01 12:34:26,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 12:34:26,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 12:34:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4521 transitions. [2023-09-01 12:34:26,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4220500373412995 [2023-09-01 12:34:26,710 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4521 transitions. [2023-09-01 12:34:26,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4521 transitions. [2023-09-01 12:34:26,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:34:26,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4521 transitions. [2023-09-01 12:34:26,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 173.8846153846154) internal successors, (4521), 26 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:34:26,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:34:26,718 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 412.0) internal successors, (11124), 27 states have internal predecessors, (11124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:34:26,718 INFO L175 Difference]: Start difference. First operand has 717 places, 2087 transitions, 81886 flow. Second operand 26 states and 4521 transitions. [2023-09-01 12:34:26,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 741 places, 2374 transitions, 95973 flow [2023-09-01 12:34:52,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 727 places, 2374 transitions, 94145 flow, removed 146 selfloop flow, removed 14 redundant places. [2023-09-01 12:34:52,923 INFO L231 Difference]: Finished difference. Result has 737 places, 2251 transitions, 90446 flow [2023-09-01 12:34:52,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=79884, PETRI_DIFFERENCE_MINUEND_PLACES=702, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=728, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=90446, PETRI_PLACES=737, PETRI_TRANSITIONS=2251} [2023-09-01 12:34:52,925 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 717 predicate places. [2023-09-01 12:34:52,925 INFO L495 AbstractCegarLoop]: Abstraction has has 737 places, 2251 transitions, 90446 flow [2023-09-01 12:34:52,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 170.76470588235293) internal successors, (2903), 17 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:34:52,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:34:52,926 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:34:52,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2023-09-01 12:34:53,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:34:53,132 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:34:53,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:34:53,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1998320291, now seen corresponding path program 66 times [2023-09-01 12:34:53,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:34:53,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121073794] [2023-09-01 12:34:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:34:53,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:34:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:34:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:34:53,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:34:53,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121073794] [2023-09-01 12:34:53,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121073794] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:34:53,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264016318] [2023-09-01 12:34:53,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:34:53,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:34:53,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:34:53,218 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:34:53,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-09-01 12:34:53,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 12:34:53,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:34:53,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:34:53,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:34:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:34:53,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:34:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:34:53,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264016318] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:34:53,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:34:53,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-09-01 12:34:53,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13881553] [2023-09-01 12:34:53,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:34:53,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 12:34:53,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:34:53,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 12:34:53,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2023-09-01 12:34:53,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:34:53,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 2251 transitions, 90446 flow. Second operand has 17 states, 17 states have (on average 170.88235294117646) internal successors, (2905), 17 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:34:53,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:34:53,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:34:53,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:35:08,244 INFO L130 PetriNetUnfolder]: 6506/13103 cut-off events. [2023-09-01 12:35:08,244 INFO L131 PetriNetUnfolder]: For 1484422/1484422 co-relation queries the response was YES. [2023-09-01 12:35:08,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215101 conditions, 13103 events. 6506/13103 cut-off events. For 1484422/1484422 co-relation queries the response was YES. Maximal size of possible extension queue 1187. Compared 122184 event pairs, 285 based on Foata normal form. 68/13171 useless extension candidates. Maximal degree in co-relation 214852. Up to 7101 conditions per place. [2023-09-01 12:35:08,545 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1738 selfloop transitions, 753 changer transitions 6/2497 dead transitions. [2023-09-01 12:35:08,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 768 places, 2497 transitions, 105089 flow [2023-09-01 12:35:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 12:35:08,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 12:35:08,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5549 transitions. [2023-09-01 12:35:08,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42088895631067963 [2023-09-01 12:35:08,548 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5549 transitions. [2023-09-01 12:35:08,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5549 transitions. [2023-09-01 12:35:08,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:35:08,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5549 transitions. [2023-09-01 12:35:08,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 173.40625) internal successors, (5549), 32 states have internal predecessors, (5549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:35:08,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 412.0) internal successors, (13596), 33 states have internal predecessors, (13596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:35:08,556 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 412.0) internal successors, (13596), 33 states have internal predecessors, (13596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:35:08,556 INFO L175 Difference]: Start difference. First operand has 737 places, 2251 transitions, 90446 flow. Second operand 32 states and 5549 transitions. [2023-09-01 12:35:08,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 768 places, 2497 transitions, 105089 flow [2023-09-01 12:35:39,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 753 places, 2497 transitions, 102502 flow, removed 958 selfloop flow, removed 15 redundant places. [2023-09-01 12:35:39,783 INFO L231 Difference]: Finished difference. Result has 764 places, 2391 transitions, 96982 flow [2023-09-01 12:35:39,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=88453, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=614, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=96982, PETRI_PLACES=764, PETRI_TRANSITIONS=2391} [2023-09-01 12:35:39,785 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 744 predicate places. [2023-09-01 12:35:39,785 INFO L495 AbstractCegarLoop]: Abstraction has has 764 places, 2391 transitions, 96982 flow [2023-09-01 12:35:39,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 170.88235294117646) internal successors, (2905), 17 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:35:39,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:35:39,786 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:35:39,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2023-09-01 12:35:39,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-09-01 12:35:39,987 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:35:39,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:35:39,987 INFO L85 PathProgramCache]: Analyzing trace with hash 414514617, now seen corresponding path program 67 times [2023-09-01 12:35:39,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:35:39,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696269765] [2023-09-01 12:35:39,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:35:39,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:35:39,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:35:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:35:40,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:35:40,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696269765] [2023-09-01 12:35:40,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696269765] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:35:40,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773085403] [2023-09-01 12:35:40,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:35:40,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:35:40,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:35:40,049 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:35:40,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-09-01 12:35:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:35:40,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:35:40,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:35:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:35:40,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:35:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:35:40,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773085403] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:35:40,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:35:40,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2023-09-01 12:35:40,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512664837] [2023-09-01 12:35:40,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:35:40,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 12:35:40,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:35:40,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 12:35:40,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-09-01 12:35:40,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:35:40,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 764 places, 2391 transitions, 96982 flow. Second operand has 17 states, 17 states have (on average 170.7058823529412) internal successors, (2902), 17 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:35:40,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:35:40,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:35:40,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:35:56,330 INFO L130 PetriNetUnfolder]: 7052/14173 cut-off events. [2023-09-01 12:35:56,330 INFO L131 PetriNetUnfolder]: For 1702508/1702508 co-relation queries the response was YES. [2023-09-01 12:35:56,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239137 conditions, 14173 events. 7052/14173 cut-off events. For 1702508/1702508 co-relation queries the response was YES. Maximal size of possible extension queue 1289. Compared 134216 event pairs, 517 based on Foata normal form. 110/14283 useless extension candidates. Maximal degree in co-relation 238878. Up to 9352 conditions per place. [2023-09-01 12:35:56,660 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1879 selfloop transitions, 866 changer transitions 0/2745 dead transitions. [2023-09-01 12:35:56,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 784 places, 2745 transitions, 116600 flow [2023-09-01 12:35:56,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 12:35:56,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 12:35:56,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3839 transitions. [2023-09-01 12:35:56,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42354368932038833 [2023-09-01 12:35:56,662 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3839 transitions. [2023-09-01 12:35:56,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3839 transitions. [2023-09-01 12:35:56,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:35:56,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3839 transitions. [2023-09-01 12:35:56,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 174.5) internal successors, (3839), 22 states have internal predecessors, (3839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:35:56,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:35:56,669 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 412.0) internal successors, (9476), 23 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:35:56,669 INFO L175 Difference]: Start difference. First operand has 764 places, 2391 transitions, 96982 flow. Second operand 22 states and 3839 transitions. [2023-09-01 12:35:56,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 784 places, 2745 transitions, 116600 flow [2023-09-01 12:36:32,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 768 places, 2745 transitions, 113324 flow, removed 1144 selfloop flow, removed 16 redundant places. [2023-09-01 12:36:32,605 INFO L231 Difference]: Finished difference. Result has 777 places, 2579 transitions, 105209 flow [2023-09-01 12:36:32,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=93622, PETRI_DIFFERENCE_MINUEND_PLACES=747, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=666, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=105209, PETRI_PLACES=777, PETRI_TRANSITIONS=2579} [2023-09-01 12:36:32,608 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 757 predicate places. [2023-09-01 12:36:32,608 INFO L495 AbstractCegarLoop]: Abstraction has has 777 places, 2579 transitions, 105209 flow [2023-09-01 12:36:32,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 170.7058823529412) internal successors, (2902), 17 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:36:32,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:36:32,609 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:36:32,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-09-01 12:36:32,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:36:32,815 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:36:32,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:36:32,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1977314083, now seen corresponding path program 68 times [2023-09-01 12:36:32,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:36:32,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802016742] [2023-09-01 12:36:32,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:36:32,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:36:32,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:36:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:36:32,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:36:32,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802016742] [2023-09-01 12:36:32,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802016742] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:36:32,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120243961] [2023-09-01 12:36:32,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:36:32,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:36:32,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:36:32,887 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:36:32,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-09-01 12:36:33,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:36:33,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:36:33,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:36:33,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:36:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:36:33,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:36:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:36:33,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120243961] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:36:33,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:36:33,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 16 [2023-09-01 12:36:33,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702870239] [2023-09-01 12:36:33,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:36:33,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 12:36:33,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:36:33,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 12:36:33,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-09-01 12:36:33,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:36:33,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 777 places, 2579 transitions, 105209 flow. Second operand has 16 states, 16 states have (on average 170.9375) internal successors, (2735), 16 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:36:33,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:36:33,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:36:33,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:36:49,542 INFO L130 PetriNetUnfolder]: 6955/14036 cut-off events. [2023-09-01 12:36:49,542 INFO L131 PetriNetUnfolder]: For 1617603/1617603 co-relation queries the response was YES. [2023-09-01 12:36:49,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235552 conditions, 14036 events. 6955/14036 cut-off events. For 1617603/1617603 co-relation queries the response was YES. Maximal size of possible extension queue 1285. Compared 132966 event pairs, 269 based on Foata normal form. 92/14128 useless extension candidates. Maximal degree in co-relation 235286. Up to 6204 conditions per place. [2023-09-01 12:36:49,866 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1660 selfloop transitions, 1072 changer transitions 8/2740 dead transitions. [2023-09-01 12:36:49,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 807 places, 2740 transitions, 116339 flow [2023-09-01 12:36:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 12:36:49,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 12:36:49,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5376 transitions. [2023-09-01 12:36:49,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42092076417162544 [2023-09-01 12:36:49,869 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5376 transitions. [2023-09-01 12:36:49,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5376 transitions. [2023-09-01 12:36:49,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:36:49,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5376 transitions. [2023-09-01 12:36:49,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 173.41935483870967) internal successors, (5376), 31 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:36:49,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:36:49,878 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 412.0) internal successors, (13184), 32 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:36:49,878 INFO L175 Difference]: Start difference. First operand has 777 places, 2579 transitions, 105209 flow. Second operand 31 states and 5376 transitions. [2023-09-01 12:36:49,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 807 places, 2740 transitions, 116339 flow [2023-09-01 12:37:26,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 2740 transitions, 113467 flow, removed 996 selfloop flow, removed 10 redundant places. [2023-09-01 12:37:26,538 INFO L231 Difference]: Finished difference. Result has 801 places, 2615 transitions, 107085 flow [2023-09-01 12:37:26,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=101248, PETRI_DIFFERENCE_MINUEND_PLACES=767, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1005, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=107085, PETRI_PLACES=801, PETRI_TRANSITIONS=2615} [2023-09-01 12:37:26,540 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 781 predicate places. [2023-09-01 12:37:26,541 INFO L495 AbstractCegarLoop]: Abstraction has has 801 places, 2615 transitions, 107085 flow [2023-09-01 12:37:26,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 170.9375) internal successors, (2735), 16 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:37:26,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:37:26,541 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:37:26,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-09-01 12:37:26,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:37:26,747 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:37:26,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:37:26,748 INFO L85 PathProgramCache]: Analyzing trace with hash -21418435, now seen corresponding path program 69 times [2023-09-01 12:37:26,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:37:26,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547531969] [2023-09-01 12:37:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:37:26,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:37:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:37:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:37:26,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:37:26,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547531969] [2023-09-01 12:37:26,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547531969] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:37:26,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481001137] [2023-09-01 12:37:26,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:37:26,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:37:26,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:37:26,833 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:37:26,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-09-01 12:37:26,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 12:37:26,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:37:26,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:37:26,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:37:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:37:27,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:37:27,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:37:27,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481001137] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:37:27,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:37:27,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2023-09-01 12:37:27,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680055183] [2023-09-01 12:37:27,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:37:27,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 12:37:27,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:37:27,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 12:37:27,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-09-01 12:37:27,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:37:27,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 801 places, 2615 transitions, 107085 flow. Second operand has 17 states, 17 states have (on average 170.8235294117647) internal successors, (2904), 17 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:37:27,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:37:27,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:37:27,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:37:45,319 INFO L130 PetriNetUnfolder]: 6961/14034 cut-off events. [2023-09-01 12:37:45,319 INFO L131 PetriNetUnfolder]: For 1555819/1555819 co-relation queries the response was YES. [2023-09-01 12:37:45,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237742 conditions, 14034 events. 6961/14034 cut-off events. For 1555819/1555819 co-relation queries the response was YES. Maximal size of possible extension queue 1288. Compared 132831 event pairs, 281 based on Foata normal form. 28/14062 useless extension candidates. Maximal degree in co-relation 237476. Up to 6341 conditions per place. [2023-09-01 12:37:45,654 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1678 selfloop transitions, 1097 changer transitions 6/2781 dead transitions. [2023-09-01 12:37:45,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 833 places, 2781 transitions, 118427 flow [2023-09-01 12:37:45,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 12:37:45,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 12:37:45,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 5896 transitions. [2023-09-01 12:37:45,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4209023415191319 [2023-09-01 12:37:45,657 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 5896 transitions. [2023-09-01 12:37:45,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 5896 transitions. [2023-09-01 12:37:45,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:37:45,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 5896 transitions. [2023-09-01 12:37:45,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 173.41176470588235) internal successors, (5896), 34 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:37:45,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 412.0) internal successors, (14420), 35 states have internal predecessors, (14420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:37:45,667 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 412.0) internal successors, (14420), 35 states have internal predecessors, (14420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:37:45,667 INFO L175 Difference]: Start difference. First operand has 801 places, 2615 transitions, 107085 flow. Second operand 34 states and 5896 transitions. [2023-09-01 12:37:45,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 833 places, 2781 transitions, 118427 flow [2023-09-01 12:38:22,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 816 places, 2781 transitions, 116318 flow, removed 922 selfloop flow, removed 17 redundant places. [2023-09-01 12:38:22,557 INFO L231 Difference]: Finished difference. Result has 826 places, 2655 transitions, 111299 flow [2023-09-01 12:38:22,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=105284, PETRI_DIFFERENCE_MINUEND_PLACES=783, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1045, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=111299, PETRI_PLACES=826, PETRI_TRANSITIONS=2655} [2023-09-01 12:38:22,559 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 806 predicate places. [2023-09-01 12:38:22,559 INFO L495 AbstractCegarLoop]: Abstraction has has 826 places, 2655 transitions, 111299 flow [2023-09-01 12:38:22,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 170.8235294117647) internal successors, (2904), 17 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:38:22,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:38:22,560 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:38:22,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-09-01 12:38:22,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-09-01 12:38:22,766 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:38:22,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:38:22,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1244867451, now seen corresponding path program 70 times [2023-09-01 12:38:22,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:38:22,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050922938] [2023-09-01 12:38:22,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:38:22,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:38:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:38:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:38:22,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:38:22,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050922938] [2023-09-01 12:38:22,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050922938] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:38:22,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023747556] [2023-09-01 12:38:22,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:38:22,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:38:22,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:38:22,842 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:38:22,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-09-01 12:38:22,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:38:22,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:38:22,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:38:22,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:38:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:38:23,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:38:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:38:23,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023747556] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:38:23,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:38:23,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-09-01 12:38:23,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232597983] [2023-09-01 12:38:23,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:38:23,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 12:38:23,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:38:23,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 12:38:23,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-09-01 12:38:23,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:38:23,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 826 places, 2655 transitions, 111299 flow. Second operand has 17 states, 17 states have (on average 170.94117647058823) internal successors, (2906), 17 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:38:23,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:38:23,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:38:23,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:38:42,766 INFO L130 PetriNetUnfolder]: 7009/14176 cut-off events. [2023-09-01 12:38:42,766 INFO L131 PetriNetUnfolder]: For 1569885/1569885 co-relation queries the response was YES. [2023-09-01 12:38:43,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240940 conditions, 14176 events. 7009/14176 cut-off events. For 1569885/1569885 co-relation queries the response was YES. Maximal size of possible extension queue 1304. Compared 135145 event pairs, 2289 based on Foata normal form. 64/14240 useless extension candidates. Maximal degree in co-relation 240666. Up to 11093 conditions per place. [2023-09-01 12:38:43,170 INFO L137 encePairwiseOnDemand]: 407/412 looper letters, 2339 selfloop transitions, 459 changer transitions 0/2798 dead transitions. [2023-09-01 12:38:43,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 844 places, 2798 transitions, 121645 flow [2023-09-01 12:38:43,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 12:38:43,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 12:38:43,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3496 transitions. [2023-09-01 12:38:43,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4242718446601942 [2023-09-01 12:38:43,172 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3496 transitions. [2023-09-01 12:38:43,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3496 transitions. [2023-09-01 12:38:43,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:38:43,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3496 transitions. [2023-09-01 12:38:43,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 174.8) internal successors, (3496), 20 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:38:43,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:38:43,177 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 412.0) internal successors, (8652), 21 states have internal predecessors, (8652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:38:43,178 INFO L175 Difference]: Start difference. First operand has 826 places, 2655 transitions, 111299 flow. Second operand 20 states and 3496 transitions. [2023-09-01 12:38:43,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 844 places, 2798 transitions, 121645 flow [2023-09-01 12:39:20,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 825 places, 2798 transitions, 120350 flow, removed 436 selfloop flow, removed 19 redundant places. [2023-09-01 12:39:20,536 INFO L231 Difference]: Finished difference. Result has 829 places, 2676 transitions, 112655 flow [2023-09-01 12:39:20,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=109616, PETRI_DIFFERENCE_MINUEND_PLACES=806, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=426, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=112655, PETRI_PLACES=829, PETRI_TRANSITIONS=2676} [2023-09-01 12:39:20,538 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 809 predicate places. [2023-09-01 12:39:20,538 INFO L495 AbstractCegarLoop]: Abstraction has has 829 places, 2676 transitions, 112655 flow [2023-09-01 12:39:20,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 170.94117647058823) internal successors, (2906), 17 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:39:20,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:39:20,539 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:39:20,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2023-09-01 12:39:20,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:39:20,741 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:39:20,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:39:20,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1560994467, now seen corresponding path program 71 times [2023-09-01 12:39:20,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:39:20,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300953107] [2023-09-01 12:39:20,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:39:20,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:39:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:39:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:39:20,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:39:20,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300953107] [2023-09-01 12:39:20,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300953107] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:39:20,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753878333] [2023-09-01 12:39:20,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:39:20,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:39:20,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:39:20,807 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:39:20,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-09-01 12:39:20,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 12:39:20,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:39:20,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:39:20,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:39:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:39:20,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:39:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:39:21,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753878333] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:39:21,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:39:21,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-09-01 12:39:21,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850141845] [2023-09-01 12:39:21,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:39:21,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 12:39:21,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:39:21,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 12:39:21,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-09-01 12:39:21,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:39:21,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 829 places, 2676 transitions, 112655 flow. Second operand has 17 states, 17 states have (on average 170.88235294117646) internal successors, (2905), 17 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:39:21,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:39:21,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:39:21,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:39:43,347 INFO L130 PetriNetUnfolder]: 7967/16156 cut-off events. [2023-09-01 12:39:43,347 INFO L131 PetriNetUnfolder]: For 1898636/1898636 co-relation queries the response was YES. [2023-09-01 12:39:43,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278656 conditions, 16156 events. 7967/16156 cut-off events. For 1898636/1898636 co-relation queries the response was YES. Maximal size of possible extension queue 1464. Compared 157258 event pairs, 239 based on Foata normal form. 48/16204 useless extension candidates. Maximal degree in co-relation 278382. Up to 5941 conditions per place. [2023-09-01 12:39:43,859 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1793 selfloop transitions, 1383 changer transitions 3/3179 dead transitions. [2023-09-01 12:39:43,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 864 places, 3179 transitions, 139852 flow [2023-09-01 12:39:43,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-09-01 12:39:43,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-09-01 12:39:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 6265 transitions. [2023-09-01 12:39:43,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223975188781014 [2023-09-01 12:39:43,863 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 6265 transitions. [2023-09-01 12:39:43,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 6265 transitions. [2023-09-01 12:39:43,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:39:43,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 6265 transitions. [2023-09-01 12:39:43,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 174.02777777777777) internal successors, (6265), 36 states have internal predecessors, (6265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:39:43,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 412.0) internal successors, (15244), 37 states have internal predecessors, (15244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:39:43,872 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 412.0) internal successors, (15244), 37 states have internal predecessors, (15244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:39:43,872 INFO L175 Difference]: Start difference. First operand has 829 places, 2676 transitions, 112655 flow. Second operand 36 states and 6265 transitions. [2023-09-01 12:39:43,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 864 places, 3179 transitions, 139852 flow [2023-09-01 12:40:28,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 855 places, 3179 transitions, 138546 flow, removed 359 selfloop flow, removed 9 redundant places. [2023-09-01 12:40:28,747 INFO L231 Difference]: Finished difference. Result has 864 places, 2968 transitions, 130690 flow [2023-09-01 12:40:28,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=412, PETRI_DIFFERENCE_MINUEND_FLOW=111497, PETRI_DIFFERENCE_MINUEND_PLACES=820, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=130690, PETRI_PLACES=864, PETRI_TRANSITIONS=2968} [2023-09-01 12:40:28,749 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 844 predicate places. [2023-09-01 12:40:28,749 INFO L495 AbstractCegarLoop]: Abstraction has has 864 places, 2968 transitions, 130690 flow [2023-09-01 12:40:28,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 170.88235294117646) internal successors, (2905), 17 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:40:28,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:40:28,750 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:40:28,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2023-09-01 12:40:28,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:40:28,950 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:40:28,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:40:28,951 INFO L85 PathProgramCache]: Analyzing trace with hash -42424643, now seen corresponding path program 72 times [2023-09-01 12:40:28,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:40:28,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597139944] [2023-09-01 12:40:28,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:40:28,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:40:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:40:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:40:29,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:40:29,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597139944] [2023-09-01 12:40:29,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597139944] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:40:29,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753046377] [2023-09-01 12:40:29,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:40:29,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:40:29,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:40:29,026 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:40:29,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-09-01 12:40:29,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 12:40:29,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:40:29,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:40:29,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:40:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:40:29,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:40:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:40:29,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753046377] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:40:29,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:40:29,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2023-09-01 12:40:29,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292152912] [2023-09-01 12:40:29,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:40:29,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 12:40:29,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:40:29,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 12:40:29,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:40:29,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 412 [2023-09-01 12:40:29,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 864 places, 2968 transitions, 130690 flow. Second operand has 18 states, 18 states have (on average 170.77777777777777) internal successors, (3074), 18 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:40:29,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:40:29,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 412 [2023-09-01 12:40:29,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:40:56,455 INFO L130 PetriNetUnfolder]: 8219/16682 cut-off events. [2023-09-01 12:40:56,455 INFO L131 PetriNetUnfolder]: For 2105296/2105296 co-relation queries the response was YES. [2023-09-01 12:40:57,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297067 conditions, 16682 events. 8219/16682 cut-off events. For 2105296/2105296 co-relation queries the response was YES. Maximal size of possible extension queue 1505. Compared 163395 event pairs, 245 based on Foata normal form. 36/16718 useless extension candidates. Maximal degree in co-relation 296784. Up to 6338 conditions per place. [2023-09-01 12:40:57,401 INFO L137 encePairwiseOnDemand]: 406/412 looper letters, 1753 selfloop transitions, 1497 changer transitions 5/3255 dead transitions. [2023-09-01 12:40:57,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 897 places, 3255 transitions, 148349 flow [2023-09-01 12:40:57,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 12:40:57,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 12:40:57,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 6098 transitions. [2023-09-01 12:40:57,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228848821081831 [2023-09-01 12:40:57,405 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 6098 transitions. [2023-09-01 12:40:57,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 6098 transitions. [2023-09-01 12:40:57,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:40:57,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 6098 transitions. [2023-09-01 12:40:57,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 174.22857142857143) internal successors, (6098), 35 states have internal predecessors, (6098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:40:57,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 412.0) internal successors, (14832), 36 states have internal predecessors, (14832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:40:57,415 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 412.0) internal successors, (14832), 36 states have internal predecessors, (14832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:40:57,415 INFO L175 Difference]: Start difference. First operand has 864 places, 2968 transitions, 130690 flow. Second operand 35 states and 6098 transitions. [2023-09-01 12:40:57,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 897 places, 3255 transitions, 148349 flow Killed by 15