./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-nondet/nondet-array-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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 ../sv-benchmarks/c/pthread-nondet/nondet-array-2.i -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 2796c466e7d8363340777400f1e90c0fc7eb53096f49ded0fb8aa6814bf1ef21 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:53:53,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:53:53,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:53:53,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:53:53,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:53:53,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:53:53,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:53:53,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:53:53,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:53:53,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:53:53,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:53:53,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:53:53,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:53:53,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:53:53,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:53:53,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:53:53,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:53:53,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:53:53,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:53:53,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:53:53,140 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:53:53,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:53:53,141 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:53:53,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:53:53,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:53:53,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:53:53,148 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:53:53,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:53:53,149 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:53:53,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:53:53,154 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:53:53,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:53:53,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:53:53,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:53:53,155 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:53:53,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:53:53,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:53:53,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:53:53,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:53:53,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:53:53,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:53:53,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:53:53,161 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:53:53,187 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:53:53,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:53:53,188 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:53:53,188 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:53:53,188 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:53:53,189 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:53:53,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:53:53,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:53:53,189 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:53:53,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:53:53,189 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:53:53,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:53:53,190 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:53:53,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:53:53,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:53:53,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:53:53,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:53:53,190 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:53:53,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:53:53,191 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:53:53,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:53:53,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:53:53,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:53:53,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:53:53,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:53:53,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:53:53,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:53:53,192 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:53:53,192 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:53:53,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:53:53,193 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:53:53,193 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:53:53,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:53:53,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2796c466e7d8363340777400f1e90c0fc7eb53096f49ded0fb8aa6814bf1ef21 [2022-07-13 21:53:53,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:53:53,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:53:53,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:53:53,382 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:53:53,383 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:53:53,384 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-nondet/nondet-array-2.i [2022-07-13 21:53:53,429 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9887a78a1/ef45d45dd7e541f8b7d25a80d075b9bf/FLAGf45fbc18c [2022-07-13 21:53:53,845 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:53:53,845 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-nondet/nondet-array-2.i [2022-07-13 21:53:53,852 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9887a78a1/ef45d45dd7e541f8b7d25a80d075b9bf/FLAGf45fbc18c [2022-07-13 21:53:53,863 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9887a78a1/ef45d45dd7e541f8b7d25a80d075b9bf [2022-07-13 21:53:53,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:53:53,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:53:53,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:53:53,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:53:53,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:53:53,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:53:53" (1/1) ... [2022-07-13 21:53:53,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a382c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:53, skipping insertion in model container [2022-07-13 21:53:53,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:53:53" (1/1) ... [2022-07-13 21:53:53,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:53:53,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:53:54,106 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-nondet/nondet-array-2.i[30035,30048] [2022-07-13 21:53:54,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:53:54,124 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:53:54,159 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-nondet/nondet-array-2.i[30035,30048] [2022-07-13 21:53:54,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:53:54,188 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:53:54,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:54 WrapperNode [2022-07-13 21:53:54,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:53:54,189 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:53:54,189 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:53:54,189 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:53:54,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:54" (1/1) ... [2022-07-13 21:53:54,204 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:54" (1/1) ... [2022-07-13 21:53:54,229 INFO L137 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2022-07-13 21:53:54,230 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:53:54,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:53:54,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:53:54,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:53:54,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:54" (1/1) ... [2022-07-13 21:53:54,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:54" (1/1) ... [2022-07-13 21:53:54,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:54" (1/1) ... [2022-07-13 21:53:54,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:54" (1/1) ... [2022-07-13 21:53:54,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:54" (1/1) ... [2022-07-13 21:53:54,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:54" (1/1) ... [2022-07-13 21:53:54,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:54" (1/1) ... [2022-07-13 21:53:54,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:53:54,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:53:54,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:53:54,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:53:54,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:54" (1/1) ... [2022-07-13 21:53:54,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:53:54,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:53:54,299 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) [2022-07-13 21:53:54,304 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 [2022-07-13 21:53:54,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-13 21:53:54,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:53:54,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:53:54,327 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2022-07-13 21:53:54,327 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2022-07-13 21:53:54,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:53:54,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:53:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:53:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:53:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:53:54,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:53:54,329 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:53:54,401 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:53:54,402 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:53:54,552 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:53:54,558 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:53:54,559 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 21:53:54,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:53:54 BoogieIcfgContainer [2022-07-13 21:53:54,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:53:54,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:53:54,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:53:54,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:53:54,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:53:53" (1/3) ... [2022-07-13 21:53:54,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75c5929f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:53:54, skipping insertion in model container [2022-07-13 21:53:54,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:53:54" (2/3) ... [2022-07-13 21:53:54,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75c5929f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:53:54, skipping insertion in model container [2022-07-13 21:53:54,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:53:54" (3/3) ... [2022-07-13 21:53:54,568 INFO L111 eAbstractionObserver]: Analyzing ICFG nondet-array-2.i [2022-07-13 21:53:54,572 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:53:54,578 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:53:54,578 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 21:53:54,578 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:53:54,612 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-13 21:53:54,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 84 places, 88 transitions, 184 flow [2022-07-13 21:53:54,663 INFO L129 PetriNetUnfolder]: 12/126 cut-off events. [2022-07-13 21:53:54,663 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:53:54,665 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 126 events. 12/126 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 227 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 71. Up to 4 conditions per place. [2022-07-13 21:53:54,665 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 88 transitions, 184 flow [2022-07-13 21:53:54,668 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 78 transitions, 164 flow [2022-07-13 21:53:54,674 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:53:54,679 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@52072c74, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7d03c9a5 [2022-07-13 21:53:54,679 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:53:54,705 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2022-07-13 21:53:54,706 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:53:54,706 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:54,707 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:54,707 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:53:54,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:54,712 INFO L85 PathProgramCache]: Analyzing trace with hash -940910248, now seen corresponding path program 1 times [2022-07-13 21:53:54,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:54,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480318275] [2022-07-13 21:53:54,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:54,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:54,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:54,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:54,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480318275] [2022-07-13 21:53:54,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480318275] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:54,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:54,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:53:54,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827526631] [2022-07-13 21:53:54,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:54,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:53:54,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:54,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:53:54,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:53:54,904 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 88 [2022-07-13 21:53:54,905 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:54,905 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:54,905 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 88 [2022-07-13 21:53:54,906 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:54,926 INFO L129 PetriNetUnfolder]: 3/99 cut-off events. [2022-07-13 21:53:54,927 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 21:53:54,927 INFO L84 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 99 events. 3/99 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 148 event pairs, 0 based on Foata normal form. 7/99 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2022-07-13 21:53:54,928 INFO L132 encePairwiseOnDemand]: 84/88 looper letters, 2 selfloop transitions, 0 changer transitions 1/74 dead transitions. [2022-07-13 21:53:54,928 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 74 transitions, 160 flow [2022-07-13 21:53:54,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:53:54,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:53:54,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 166 transitions. [2022-07-13 21:53:54,936 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9431818181818182 [2022-07-13 21:53:54,937 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 166 transitions. [2022-07-13 21:53:54,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 166 transitions. [2022-07-13 21:53:54,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:54,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 166 transitions. [2022-07-13 21:53:54,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:54,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:54,944 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:54,945 INFO L186 Difference]: Start difference. First operand has 75 places, 78 transitions, 164 flow. Second operand 2 states and 166 transitions. [2022-07-13 21:53:54,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 74 transitions, 160 flow [2022-07-13 21:53:54,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 160 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:53:54,949 INFO L242 Difference]: Finished difference. Result has 76 places, 73 transitions, 154 flow [2022-07-13 21:53:54,950 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=154, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2022-07-13 21:53:54,953 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 1 predicate places. [2022-07-13 21:53:54,953 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 154 flow [2022-07-13 21:53:54,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:54,953 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:54,953 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:54,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:53:54,954 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:53:54,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:54,955 INFO L85 PathProgramCache]: Analyzing trace with hash -53406567, now seen corresponding path program 1 times [2022-07-13 21:53:54,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:54,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222789489] [2022-07-13 21:53:54,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:54,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:55,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:55,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222789489] [2022-07-13 21:53:55,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222789489] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:55,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:55,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:53:55,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136331109] [2022-07-13 21:53:55,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:55,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:53:55,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:55,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:53:55,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:53:55,070 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2022-07-13 21:53:55,071 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 73.2) internal successors, (366), 5 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,071 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:55,071 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2022-07-13 21:53:55,071 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:55,135 INFO L129 PetriNetUnfolder]: 3/114 cut-off events. [2022-07-13 21:53:55,135 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 21:53:55,135 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 114 events. 3/114 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 195 event pairs, 0 based on Foata normal form. 2/108 useless extension candidates. Maximal degree in co-relation 141. Up to 16 conditions per place. [2022-07-13 21:53:55,136 INFO L132 encePairwiseOnDemand]: 83/88 looper letters, 8 selfloop transitions, 2 changer transitions 3/77 dead transitions. [2022-07-13 21:53:55,136 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 77 transitions, 188 flow [2022-07-13 21:53:55,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:53:55,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 21:53:55,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 374 transitions. [2022-07-13 21:53:55,141 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.85 [2022-07-13 21:53:55,143 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 374 transitions. [2022-07-13 21:53:55,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 374 transitions. [2022-07-13 21:53:55,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:55,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 374 transitions. [2022-07-13 21:53:55,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,149 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,149 INFO L186 Difference]: Start difference. First operand has 76 places, 73 transitions, 154 flow. Second operand 5 states and 374 transitions. [2022-07-13 21:53:55,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 77 transitions, 188 flow [2022-07-13 21:53:55,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 77 transitions, 188 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:53:55,151 INFO L242 Difference]: Finished difference. Result has 82 places, 74 transitions, 170 flow [2022-07-13 21:53:55,151 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=82, PETRI_TRANSITIONS=74} [2022-07-13 21:53:55,152 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 7 predicate places. [2022-07-13 21:53:55,152 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 74 transitions, 170 flow [2022-07-13 21:53:55,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.2) internal successors, (366), 5 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,153 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:55,153 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:55,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:53:55,153 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:53:55,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:55,154 INFO L85 PathProgramCache]: Analyzing trace with hash -658806082, now seen corresponding path program 1 times [2022-07-13 21:53:55,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:55,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206399498] [2022-07-13 21:53:55,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:55,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:53:55,186 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:53:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:53:55,218 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:53:55,218 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:53:55,219 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:53:55,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:53:55,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:53:55,221 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-13 21:53:55,222 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:53:55,222 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-13 21:53:55,233 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 21:53:55,235 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 92 places, 95 transitions, 208 flow [2022-07-13 21:53:55,259 INFO L129 PetriNetUnfolder]: 23/217 cut-off events. [2022-07-13 21:53:55,260 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-13 21:53:55,262 INFO L84 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 217 events. 23/217 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 513 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 128. Up to 8 conditions per place. [2022-07-13 21:53:55,262 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 95 transitions, 208 flow [2022-07-13 21:53:55,264 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 85 transitions, 188 flow [2022-07-13 21:53:55,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:53:55,271 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@52072c74, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7d03c9a5 [2022-07-13 21:53:55,272 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:53:55,277 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2022-07-13 21:53:55,283 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:53:55,283 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:55,283 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:55,284 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:53:55,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:55,284 INFO L85 PathProgramCache]: Analyzing trace with hash 348299546, now seen corresponding path program 1 times [2022-07-13 21:53:55,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:55,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495016145] [2022-07-13 21:53:55,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:55,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:55,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:55,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495016145] [2022-07-13 21:53:55,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495016145] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:55,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:55,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:53:55,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514647104] [2022-07-13 21:53:55,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:55,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:53:55,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:55,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:53:55,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:53:55,325 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 95 [2022-07-13 21:53:55,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 85 transitions, 188 flow. Second operand has 2 states, 2 states have (on average 86.0) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:55,325 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 95 [2022-07-13 21:53:55,325 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:55,342 INFO L129 PetriNetUnfolder]: 7/165 cut-off events. [2022-07-13 21:53:55,343 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-13 21:53:55,343 INFO L84 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 165 events. 7/165 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 324 event pairs, 0 based on Foata normal form. 12/165 useless extension candidates. Maximal degree in co-relation 103. Up to 8 conditions per place. [2022-07-13 21:53:55,343 INFO L132 encePairwiseOnDemand]: 91/95 looper letters, 4 selfloop transitions, 0 changer transitions 1/81 dead transitions. [2022-07-13 21:53:55,343 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 188 flow [2022-07-13 21:53:55,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:53:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:53:55,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 178 transitions. [2022-07-13 21:53:55,347 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9368421052631579 [2022-07-13 21:53:55,347 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 178 transitions. [2022-07-13 21:53:55,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 178 transitions. [2022-07-13 21:53:55,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:55,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 178 transitions. [2022-07-13 21:53:55,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 89.0) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,350 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,350 INFO L186 Difference]: Start difference. First operand has 83 places, 85 transitions, 188 flow. Second operand 2 states and 178 transitions. [2022-07-13 21:53:55,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 188 flow [2022-07-13 21:53:55,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 81 transitions, 188 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:53:55,352 INFO L242 Difference]: Finished difference. Result has 84 places, 80 transitions, 178 flow [2022-07-13 21:53:55,352 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=178, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2022-07-13 21:53:55,353 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 1 predicate places. [2022-07-13 21:53:55,353 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 178 flow [2022-07-13 21:53:55,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 86.0) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,353 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:55,353 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:55,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:53:55,354 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:53:55,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:55,354 INFO L85 PathProgramCache]: Analyzing trace with hash 280868760, now seen corresponding path program 1 times [2022-07-13 21:53:55,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:55,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156080832] [2022-07-13 21:53:55,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:55,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:55,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:55,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156080832] [2022-07-13 21:53:55,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156080832] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:55,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:55,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:53:55,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176126104] [2022-07-13 21:53:55,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:55,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:53:55,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:55,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:53:55,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:53:55,407 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 95 [2022-07-13 21:53:55,407 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,409 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:55,409 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 95 [2022-07-13 21:53:55,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:55,462 INFO L129 PetriNetUnfolder]: 7/196 cut-off events. [2022-07-13 21:53:55,463 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-13 21:53:55,463 INFO L84 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 196 events. 7/196 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 461 event pairs, 0 based on Foata normal form. 4/185 useless extension candidates. Maximal degree in co-relation 254. Up to 32 conditions per place. [2022-07-13 21:53:55,464 INFO L132 encePairwiseOnDemand]: 90/95 looper letters, 10 selfloop transitions, 2 changer transitions 3/84 dead transitions. [2022-07-13 21:53:55,464 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 84 transitions, 216 flow [2022-07-13 21:53:55,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:53:55,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 21:53:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 401 transitions. [2022-07-13 21:53:55,466 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8442105263157895 [2022-07-13 21:53:55,466 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 401 transitions. [2022-07-13 21:53:55,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 401 transitions. [2022-07-13 21:53:55,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:55,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 401 transitions. [2022-07-13 21:53:55,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 95.0) internal successors, (570), 6 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,470 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 95.0) internal successors, (570), 6 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,470 INFO L186 Difference]: Start difference. First operand has 84 places, 80 transitions, 178 flow. Second operand 5 states and 401 transitions. [2022-07-13 21:53:55,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 84 transitions, 216 flow [2022-07-13 21:53:55,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 84 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:53:55,475 INFO L242 Difference]: Finished difference. Result has 90 places, 81 transitions, 194 flow [2022-07-13 21:53:55,475 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=90, PETRI_TRANSITIONS=81} [2022-07-13 21:53:55,476 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 7 predicate places. [2022-07-13 21:53:55,476 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 81 transitions, 194 flow [2022-07-13 21:53:55,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,477 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:55,477 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:55,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:53:55,477 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:53:55,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:55,478 INFO L85 PathProgramCache]: Analyzing trace with hash -123182927, now seen corresponding path program 1 times [2022-07-13 21:53:55,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:55,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125958505] [2022-07-13 21:53:55,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:55,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:55,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:55,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125958505] [2022-07-13 21:53:55,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125958505] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:55,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:55,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:53:55,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585632848] [2022-07-13 21:53:55,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:55,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:53:55,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:55,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:53:55,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:53:55,552 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 95 [2022-07-13 21:53:55,552 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 81 transitions, 194 flow. Second operand has 5 states, 5 states have (on average 65.8) internal successors, (329), 5 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,552 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:55,553 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 95 [2022-07-13 21:53:55,553 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:55,633 INFO L129 PetriNetUnfolder]: 7/190 cut-off events. [2022-07-13 21:53:55,633 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-13 21:53:55,634 INFO L84 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 190 events. 7/190 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 412 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 317. Up to 49 conditions per place. [2022-07-13 21:53:55,635 INFO L132 encePairwiseOnDemand]: 84/95 looper letters, 34 selfloop transitions, 6 changer transitions 7/102 dead transitions. [2022-07-13 21:53:55,635 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 102 transitions, 336 flow [2022-07-13 21:53:55,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 21:53:55,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 21:53:55,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 301 transitions. [2022-07-13 21:53:55,637 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7921052631578948 [2022-07-13 21:53:55,637 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 301 transitions. [2022-07-13 21:53:55,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 301 transitions. [2022-07-13 21:53:55,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:55,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 301 transitions. [2022-07-13 21:53:55,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,639 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,639 INFO L186 Difference]: Start difference. First operand has 90 places, 81 transitions, 194 flow. Second operand 4 states and 301 transitions. [2022-07-13 21:53:55,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 102 transitions, 336 flow [2022-07-13 21:53:55,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 102 transitions, 330 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-13 21:53:55,651 INFO L242 Difference]: Finished difference. Result has 90 places, 84 transitions, 228 flow [2022-07-13 21:53:55,651 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=90, PETRI_TRANSITIONS=84} [2022-07-13 21:53:55,651 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 7 predicate places. [2022-07-13 21:53:55,652 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 84 transitions, 228 flow [2022-07-13 21:53:55,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.8) internal successors, (329), 5 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,652 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:55,652 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:55,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:53:55,652 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:53:55,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:55,653 INFO L85 PathProgramCache]: Analyzing trace with hash 618023769, now seen corresponding path program 1 times [2022-07-13 21:53:55,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:55,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418050848] [2022-07-13 21:53:55,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:55,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:53:55,697 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:53:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:53:55,726 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:53:55,726 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:53:55,726 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:53:55,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:53:55,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:53:55,727 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-13 21:53:55,727 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:53:55,727 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-13 21:53:55,747 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-13 21:53:55,749 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 102 transitions, 234 flow [2022-07-13 21:53:55,776 INFO L129 PetriNetUnfolder]: 45/383 cut-off events. [2022-07-13 21:53:55,776 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-13 21:53:55,777 INFO L84 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 383 events. 45/383 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1194 event pairs, 1 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 225. Up to 16 conditions per place. [2022-07-13 21:53:55,777 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 102 transitions, 234 flow [2022-07-13 21:53:55,778 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 92 transitions, 214 flow [2022-07-13 21:53:55,779 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:53:55,780 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@52072c74, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7d03c9a5 [2022-07-13 21:53:55,780 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:53:55,784 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2022-07-13 21:53:55,784 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:53:55,784 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:55,785 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:55,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:53:55,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:55,786 INFO L85 PathProgramCache]: Analyzing trace with hash 429396767, now seen corresponding path program 1 times [2022-07-13 21:53:55,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:55,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506454898] [2022-07-13 21:53:55,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:55,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:55,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:55,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506454898] [2022-07-13 21:53:55,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506454898] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:55,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:55,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:53:55,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507450920] [2022-07-13 21:53:55,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:55,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:53:55,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:55,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:53:55,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:53:55,823 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 102 [2022-07-13 21:53:55,823 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 214 flow. Second operand has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,824 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:55,824 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 102 [2022-07-13 21:53:55,824 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:55,846 INFO L129 PetriNetUnfolder]: 16/282 cut-off events. [2022-07-13 21:53:55,847 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-07-13 21:53:55,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 282 events. 16/282 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 789 event pairs, 1 based on Foata normal form. 21/282 useless extension candidates. Maximal degree in co-relation 179. Up to 16 conditions per place. [2022-07-13 21:53:55,848 INFO L132 encePairwiseOnDemand]: 98/102 looper letters, 6 selfloop transitions, 0 changer transitions 1/88 dead transitions. [2022-07-13 21:53:55,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 88 transitions, 218 flow [2022-07-13 21:53:55,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:53:55,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:53:55,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 190 transitions. [2022-07-13 21:53:55,849 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9313725490196079 [2022-07-13 21:53:55,849 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 190 transitions. [2022-07-13 21:53:55,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 190 transitions. [2022-07-13 21:53:55,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:55,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 190 transitions. [2022-07-13 21:53:55,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 95.0) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,851 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,851 INFO L186 Difference]: Start difference. First operand has 91 places, 92 transitions, 214 flow. Second operand 2 states and 190 transitions. [2022-07-13 21:53:55,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 88 transitions, 218 flow [2022-07-13 21:53:55,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 88 transitions, 218 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:53:55,853 INFO L242 Difference]: Finished difference. Result has 92 places, 87 transitions, 204 flow [2022-07-13 21:53:55,853 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=204, PETRI_PLACES=92, PETRI_TRANSITIONS=87} [2022-07-13 21:53:55,855 INFO L279 CegarLoopForPetriNet]: 91 programPoint places, 1 predicate places. [2022-07-13 21:53:55,855 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 87 transitions, 204 flow [2022-07-13 21:53:55,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,855 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:55,855 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:55,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 21:53:55,856 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:53:55,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:55,857 INFO L85 PathProgramCache]: Analyzing trace with hash 232883262, now seen corresponding path program 1 times [2022-07-13 21:53:55,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:55,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124166710] [2022-07-13 21:53:55,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:55,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:55,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:55,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124166710] [2022-07-13 21:53:55,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124166710] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:55,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:55,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:53:55,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248545815] [2022-07-13 21:53:55,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:55,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:53:55,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:55,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:53:55,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:53:55,930 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2022-07-13 21:53:55,931 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 87 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,931 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:55,931 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2022-07-13 21:53:55,931 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:55,979 INFO L129 PetriNetUnfolder]: 16/345 cut-off events. [2022-07-13 21:53:55,979 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-07-13 21:53:55,980 INFO L84 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 345 events. 16/345 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1118 event pairs, 1 based on Foata normal form. 8/325 useless extension candidates. Maximal degree in co-relation 465. Up to 65 conditions per place. [2022-07-13 21:53:55,981 INFO L132 encePairwiseOnDemand]: 97/102 looper letters, 12 selfloop transitions, 2 changer transitions 3/91 dead transitions. [2022-07-13 21:53:55,981 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 91 transitions, 246 flow [2022-07-13 21:53:55,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:53:55,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 21:53:55,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 428 transitions. [2022-07-13 21:53:55,982 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8392156862745098 [2022-07-13 21:53:55,982 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 428 transitions. [2022-07-13 21:53:55,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 428 transitions. [2022-07-13 21:53:55,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:55,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 428 transitions. [2022-07-13 21:53:55,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.6) internal successors, (428), 5 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,985 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,985 INFO L186 Difference]: Start difference. First operand has 92 places, 87 transitions, 204 flow. Second operand 5 states and 428 transitions. [2022-07-13 21:53:55,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 91 transitions, 246 flow [2022-07-13 21:53:55,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 91 transitions, 246 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:53:55,987 INFO L242 Difference]: Finished difference. Result has 98 places, 88 transitions, 220 flow [2022-07-13 21:53:55,987 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=98, PETRI_TRANSITIONS=88} [2022-07-13 21:53:55,987 INFO L279 CegarLoopForPetriNet]: 91 programPoint places, 7 predicate places. [2022-07-13 21:53:55,998 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 88 transitions, 220 flow [2022-07-13 21:53:55,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:55,999 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:55,999 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:55,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 21:53:55,999 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:53:55,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:56,000 INFO L85 PathProgramCache]: Analyzing trace with hash 293691249, now seen corresponding path program 1 times [2022-07-13 21:53:56,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:56,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48506222] [2022-07-13 21:53:56,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:56,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:56,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:56,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48506222] [2022-07-13 21:53:56,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48506222] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:56,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:56,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:53:56,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664601281] [2022-07-13 21:53:56,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:56,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:53:56,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:56,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:53:56,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:53:56,046 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 102 [2022-07-13 21:53:56,046 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 88 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 70.8) internal successors, (354), 5 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:56,046 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:56,046 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 102 [2022-07-13 21:53:56,046 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:56,127 INFO L129 PetriNetUnfolder]: 18/353 cut-off events. [2022-07-13 21:53:56,127 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-13 21:53:56,128 INFO L84 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 353 events. 18/353 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1273 event pairs, 0 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 614. Up to 107 conditions per place. [2022-07-13 21:53:56,129 INFO L132 encePairwiseOnDemand]: 91/102 looper letters, 37 selfloop transitions, 6 changer transitions 7/110 dead transitions. [2022-07-13 21:53:56,129 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 110 transitions, 373 flow [2022-07-13 21:53:56,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 21:53:56,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 21:53:56,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 324 transitions. [2022-07-13 21:53:56,130 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7941176470588235 [2022-07-13 21:53:56,130 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 324 transitions. [2022-07-13 21:53:56,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 324 transitions. [2022-07-13 21:53:56,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:56,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 324 transitions. [2022-07-13 21:53:56,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:56,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:56,132 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:56,133 INFO L186 Difference]: Start difference. First operand has 98 places, 88 transitions, 220 flow. Second operand 4 states and 324 transitions. [2022-07-13 21:53:56,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 110 transitions, 373 flow [2022-07-13 21:53:56,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 110 transitions, 367 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-13 21:53:56,135 INFO L242 Difference]: Finished difference. Result has 98 places, 91 transitions, 254 flow [2022-07-13 21:53:56,135 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=98, PETRI_TRANSITIONS=91} [2022-07-13 21:53:56,136 INFO L279 CegarLoopForPetriNet]: 91 programPoint places, 7 predicate places. [2022-07-13 21:53:56,136 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 91 transitions, 254 flow [2022-07-13 21:53:56,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.8) internal successors, (354), 5 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:56,136 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:56,137 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:56,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 21:53:56,137 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:53:56,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:56,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1470109151, now seen corresponding path program 1 times [2022-07-13 21:53:56,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:56,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096491007] [2022-07-13 21:53:56,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:56,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:53:56,152 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:53:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:53:56,177 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:53:56,177 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:53:56,178 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:53:56,178 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:53:56,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 21:53:56,178 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-13 21:53:56,178 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:53:56,178 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-13 21:53:56,194 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-13 21:53:56,197 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 108 places, 109 transitions, 262 flow [2022-07-13 21:53:56,240 INFO L129 PetriNetUnfolder]: 91/701 cut-off events. [2022-07-13 21:53:56,240 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-13 21:53:56,242 INFO L84 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 701 events. 91/701 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3077 event pairs, 6 based on Foata normal form. 0/594 useless extension candidates. Maximal degree in co-relation 403. Up to 32 conditions per place. [2022-07-13 21:53:56,242 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 109 transitions, 262 flow [2022-07-13 21:53:56,245 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 242 flow [2022-07-13 21:53:56,246 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:53:56,247 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@52072c74, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7d03c9a5 [2022-07-13 21:53:56,247 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:53:56,250 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2022-07-13 21:53:56,250 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:53:56,250 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:56,250 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:56,251 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:53:56,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:56,251 INFO L85 PathProgramCache]: Analyzing trace with hash -326445780, now seen corresponding path program 1 times [2022-07-13 21:53:56,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:56,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933272838] [2022-07-13 21:53:56,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:56,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:56,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:56,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933272838] [2022-07-13 21:53:56,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933272838] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:56,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:56,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:53:56,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777882828] [2022-07-13 21:53:56,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:56,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:53:56,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:56,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:53:56,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:53:56,274 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 109 [2022-07-13 21:53:56,275 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 99 transitions, 242 flow. Second operand has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:56,275 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:56,275 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 109 [2022-07-13 21:53:56,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:56,320 INFO L129 PetriNetUnfolder]: 37/503 cut-off events. [2022-07-13 21:53:56,321 INFO L130 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2022-07-13 21:53:56,322 INFO L84 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 503 events. 37/503 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1975 event pairs, 6 based on Foata normal form. 38/503 useless extension candidates. Maximal degree in co-relation 317. Up to 37 conditions per place. [2022-07-13 21:53:56,323 INFO L132 encePairwiseOnDemand]: 105/109 looper letters, 8 selfloop transitions, 0 changer transitions 1/95 dead transitions. [2022-07-13 21:53:56,323 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 95 transitions, 250 flow [2022-07-13 21:53:56,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:53:56,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:53:56,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 202 transitions. [2022-07-13 21:53:56,324 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.926605504587156 [2022-07-13 21:53:56,324 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 202 transitions. [2022-07-13 21:53:56,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 202 transitions. [2022-07-13 21:53:56,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:56,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 202 transitions. [2022-07-13 21:53:56,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 101.0) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:56,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:56,326 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:56,326 INFO L186 Difference]: Start difference. First operand has 99 places, 99 transitions, 242 flow. Second operand 2 states and 202 transitions. [2022-07-13 21:53:56,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 95 transitions, 250 flow [2022-07-13 21:53:56,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 95 transitions, 250 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:53:56,327 INFO L242 Difference]: Finished difference. Result has 100 places, 94 transitions, 232 flow [2022-07-13 21:53:56,328 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=232, PETRI_PLACES=100, PETRI_TRANSITIONS=94} [2022-07-13 21:53:56,328 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, 1 predicate places. [2022-07-13 21:53:56,328 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 94 transitions, 232 flow [2022-07-13 21:53:56,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:56,329 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:56,329 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:56,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 21:53:56,329 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:53:56,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:56,329 INFO L85 PathProgramCache]: Analyzing trace with hash -197363061, now seen corresponding path program 1 times [2022-07-13 21:53:56,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:56,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044816470] [2022-07-13 21:53:56,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:56,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:56,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:56,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:56,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044816470] [2022-07-13 21:53:56,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044816470] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:56,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:56,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:53:56,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070374048] [2022-07-13 21:53:56,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:56,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:53:56,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:56,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:53:56,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:53:56,357 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 109 [2022-07-13 21:53:56,358 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 94 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 88.2) internal successors, (441), 5 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:56,358 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:56,358 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 109 [2022-07-13 21:53:56,358 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:56,440 INFO L129 PetriNetUnfolder]: 37/630 cut-off events. [2022-07-13 21:53:56,440 INFO L130 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2022-07-13 21:53:56,442 INFO L84 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 630 events. 37/630 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2834 event pairs, 6 based on Foata normal form. 16/593 useless extension candidates. Maximal degree in co-relation 877. Up to 134 conditions per place. [2022-07-13 21:53:56,443 INFO L132 encePairwiseOnDemand]: 104/109 looper letters, 14 selfloop transitions, 2 changer transitions 3/98 dead transitions. [2022-07-13 21:53:56,443 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 98 transitions, 278 flow [2022-07-13 21:53:56,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:53:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 21:53:56,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 455 transitions. [2022-07-13 21:53:56,445 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8348623853211009 [2022-07-13 21:53:56,445 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 455 transitions. [2022-07-13 21:53:56,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 455 transitions. [2022-07-13 21:53:56,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:56,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 455 transitions. [2022-07-13 21:53:56,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:56,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:56,447 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:56,447 INFO L186 Difference]: Start difference. First operand has 100 places, 94 transitions, 232 flow. Second operand 5 states and 455 transitions. [2022-07-13 21:53:56,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 98 transitions, 278 flow [2022-07-13 21:53:56,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 98 transitions, 278 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:53:56,449 INFO L242 Difference]: Finished difference. Result has 106 places, 95 transitions, 248 flow [2022-07-13 21:53:56,450 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=106, PETRI_TRANSITIONS=95} [2022-07-13 21:53:56,450 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, 7 predicate places. [2022-07-13 21:53:56,450 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 95 transitions, 248 flow [2022-07-13 21:53:56,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 88.2) internal successors, (441), 5 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:56,451 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:56,451 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:56,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 21:53:56,451 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:53:56,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:56,452 INFO L85 PathProgramCache]: Analyzing trace with hash 402314257, now seen corresponding path program 1 times [2022-07-13 21:53:56,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:56,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890632903] [2022-07-13 21:53:56,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:56,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:53:56,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:56,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890632903] [2022-07-13 21:53:56,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890632903] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:53:56,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:53:56,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:53:56,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728251246] [2022-07-13 21:53:56,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:53:56,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:53:56,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:56,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:53:56,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:53:56,488 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 109 [2022-07-13 21:53:56,489 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 95 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:56,489 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:56,489 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 109 [2022-07-13 21:53:56,489 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:53:56,587 INFO L129 PetriNetUnfolder]: 42/656 cut-off events. [2022-07-13 21:53:56,587 INFO L130 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2022-07-13 21:53:56,588 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 656 events. 42/656 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3224 event pairs, 1 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 1172. Up to 222 conditions per place. [2022-07-13 21:53:56,590 INFO L132 encePairwiseOnDemand]: 98/109 looper letters, 40 selfloop transitions, 6 changer transitions 7/118 dead transitions. [2022-07-13 21:53:56,590 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 118 transitions, 412 flow [2022-07-13 21:53:56,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 21:53:56,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 21:53:56,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 347 transitions. [2022-07-13 21:53:56,591 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7958715596330275 [2022-07-13 21:53:56,591 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 347 transitions. [2022-07-13 21:53:56,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 347 transitions. [2022-07-13 21:53:56,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:53:56,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 347 transitions. [2022-07-13 21:53:56,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:56,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 109.0) internal successors, (545), 5 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:56,593 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 109.0) internal successors, (545), 5 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:56,593 INFO L186 Difference]: Start difference. First operand has 106 places, 95 transitions, 248 flow. Second operand 4 states and 347 transitions. [2022-07-13 21:53:56,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 118 transitions, 412 flow [2022-07-13 21:53:56,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 118 transitions, 406 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-13 21:53:56,596 INFO L242 Difference]: Finished difference. Result has 106 places, 98 transitions, 282 flow [2022-07-13 21:53:56,596 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=106, PETRI_TRANSITIONS=98} [2022-07-13 21:53:56,597 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, 7 predicate places. [2022-07-13 21:53:56,597 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 98 transitions, 282 flow [2022-07-13 21:53:56,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:56,597 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:53:56,597 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:53:56,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 21:53:56,598 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:53:56,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:53:56,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1092255810, now seen corresponding path program 1 times [2022-07-13 21:53:56,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:53:56,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763642686] [2022-07-13 21:53:56,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:56,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:53:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:53:56,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:53:56,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763642686] [2022-07-13 21:53:56,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763642686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:53:56,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383993283] [2022-07-13 21:53:56,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:53:56,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:53:56,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:53:56,712 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) [2022-07-13 21:53:56,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:53:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:53:56,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 21:53:56,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:53:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 21:53:57,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:53:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 21:53:57,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383993283] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:53:57,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:53:57,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 24 [2022-07-13 21:53:57,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421166057] [2022-07-13 21:53:57,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:53:57,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 21:53:57,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:53:57,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 21:53:57,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-07-13 21:53:57,194 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 109 [2022-07-13 21:53:57,196 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 98 transitions, 282 flow. Second operand has 24 states, 24 states have (on average 45.958333333333336) internal successors, (1103), 24 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:53:57,196 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:53:57,196 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 109 [2022-07-13 21:53:57,196 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:54:06,996 INFO L129 PetriNetUnfolder]: 62875/102731 cut-off events. [2022-07-13 21:54:06,996 INFO L130 PetriNetUnfolder]: For 11793/11793 co-relation queries the response was YES. [2022-07-13 21:54:07,268 INFO L84 FinitePrefix]: Finished finitePrefix Result has 215977 conditions, 102731 events. 62875/102731 cut-off events. For 11793/11793 co-relation queries the response was YES. Maximal size of possible extension queue 2017. Compared 877017 event pairs, 6202 based on Foata normal form. 278/102765 useless extension candidates. Maximal degree in co-relation 215966. Up to 10176 conditions per place. [2022-07-13 21:54:07,686 INFO L132 encePairwiseOnDemand]: 80/109 looper letters, 459 selfloop transitions, 164 changer transitions 24/682 dead transitions. [2022-07-13 21:54:07,687 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 682 transitions, 3054 flow [2022-07-13 21:54:07,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-13 21:54:07,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-13 21:54:07,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3220 transitions. [2022-07-13 21:54:07,695 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.48428335087983154 [2022-07-13 21:54:07,696 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3220 transitions. [2022-07-13 21:54:07,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3220 transitions. [2022-07-13 21:54:07,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:54:07,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3220 transitions. [2022-07-13 21:54:07,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 52.78688524590164) internal successors, (3220), 61 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:07,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 109.0) internal successors, (6758), 62 states have internal predecessors, (6758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:07,713 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 109.0) internal successors, (6758), 62 states have internal predecessors, (6758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:07,714 INFO L186 Difference]: Start difference. First operand has 106 places, 98 transitions, 282 flow. Second operand 61 states and 3220 transitions. [2022-07-13 21:54:07,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 682 transitions, 3054 flow [2022-07-13 21:54:07,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 682 transitions, 2990 flow, removed 21 selfloop flow, removed 2 redundant places. [2022-07-13 21:54:07,914 INFO L242 Difference]: Finished difference. Result has 197 places, 264 transitions, 1453 flow [2022-07-13 21:54:07,914 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=1453, PETRI_PLACES=197, PETRI_TRANSITIONS=264} [2022-07-13 21:54:07,915 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, 98 predicate places. [2022-07-13 21:54:07,915 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 264 transitions, 1453 flow [2022-07-13 21:54:07,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 45.958333333333336) internal successors, (1103), 24 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:07,916 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:07,916 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:54:07,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 21:54:08,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-13 21:54:08,128 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:54:08,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:08,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1090444432, now seen corresponding path program 1 times [2022-07-13 21:54:08,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:08,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330269131] [2022-07-13 21:54:08,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:08,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:54:08,152 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:54:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:54:08,187 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:54:08,188 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:54:08,188 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:54:08,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:54:08,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 21:54:08,188 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 21:54:08,189 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:54:08,189 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-13 21:54:08,201 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-13 21:54:08,203 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 116 places, 116 transitions, 292 flow [2022-07-13 21:54:08,266 INFO L129 PetriNetUnfolder]: 189/1327 cut-off events. [2022-07-13 21:54:08,266 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-13 21:54:08,269 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1438 conditions, 1327 events. 189/1327 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 7697 event pairs, 23 based on Foata normal form. 0/1122 useless extension candidates. Maximal degree in co-relation 746. Up to 80 conditions per place. [2022-07-13 21:54:08,269 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 116 transitions, 292 flow [2022-07-13 21:54:08,276 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 106 transitions, 272 flow [2022-07-13 21:54:08,279 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:54:08,279 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@52072c74, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7d03c9a5 [2022-07-13 21:54:08,279 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:54:08,281 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2022-07-13 21:54:08,281 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:54:08,282 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:08,282 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:54:08,282 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:54:08,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:08,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1138952928, now seen corresponding path program 1 times [2022-07-13 21:54:08,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:08,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452763828] [2022-07-13 21:54:08,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:08,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:08,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:54:08,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452763828] [2022-07-13 21:54:08,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452763828] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:54:08,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:54:08,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:54:08,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542266844] [2022-07-13 21:54:08,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:54:08,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:54:08,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:54:08,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:54:08,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:54:08,295 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 116 [2022-07-13 21:54:08,295 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 106 transitions, 272 flow. Second operand has 2 states, 2 states have (on average 100.5) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:08,295 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:54:08,295 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 116 [2022-07-13 21:54:08,295 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:54:08,347 INFO L129 PetriNetUnfolder]: 86/936 cut-off events. [2022-07-13 21:54:08,347 INFO L130 PetriNetUnfolder]: For 285/285 co-relation queries the response was YES. [2022-07-13 21:54:08,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 936 events. 86/936 cut-off events. For 285/285 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4961 event pairs, 23 based on Foata normal form. 71/936 useless extension candidates. Maximal degree in co-relation 584. Up to 86 conditions per place. [2022-07-13 21:54:08,350 INFO L132 encePairwiseOnDemand]: 112/116 looper letters, 10 selfloop transitions, 0 changer transitions 1/102 dead transitions. [2022-07-13 21:54:08,350 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 102 transitions, 284 flow [2022-07-13 21:54:08,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:54:08,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:54:08,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 214 transitions. [2022-07-13 21:54:08,351 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9224137931034483 [2022-07-13 21:54:08,351 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 214 transitions. [2022-07-13 21:54:08,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 214 transitions. [2022-07-13 21:54:08,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:54:08,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 214 transitions. [2022-07-13 21:54:08,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 107.0) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:08,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:08,354 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:08,354 INFO L186 Difference]: Start difference. First operand has 107 places, 106 transitions, 272 flow. Second operand 2 states and 214 transitions. [2022-07-13 21:54:08,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 102 transitions, 284 flow [2022-07-13 21:54:08,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 102 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:54:08,356 INFO L242 Difference]: Finished difference. Result has 108 places, 101 transitions, 262 flow [2022-07-13 21:54:08,356 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=262, PETRI_PLACES=108, PETRI_TRANSITIONS=101} [2022-07-13 21:54:08,357 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 1 predicate places. [2022-07-13 21:54:08,357 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 262 flow [2022-07-13 21:54:08,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 100.5) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:08,357 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:08,358 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:54:08,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 21:54:08,358 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:54:08,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:08,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1009870209, now seen corresponding path program 1 times [2022-07-13 21:54:08,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:08,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813106223] [2022-07-13 21:54:08,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:08,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:08,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:54:08,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813106223] [2022-07-13 21:54:08,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813106223] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:54:08,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:54:08,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:54:08,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952573792] [2022-07-13 21:54:08,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:54:08,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:54:08,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:54:08,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:54:08,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:54:08,387 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 116 [2022-07-13 21:54:08,387 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 93.2) internal successors, (466), 5 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:08,387 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:54:08,388 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 116 [2022-07-13 21:54:08,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:54:08,487 INFO L129 PetriNetUnfolder]: 86/1191 cut-off events. [2022-07-13 21:54:08,487 INFO L130 PetriNetUnfolder]: For 285/285 co-relation queries the response was YES. [2022-07-13 21:54:08,490 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1710 conditions, 1191 events. 86/1191 cut-off events. For 285/285 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 7100 event pairs, 23 based on Foata normal form. 32/1121 useless extension candidates. Maximal degree in co-relation 1702. Up to 279 conditions per place. [2022-07-13 21:54:08,492 INFO L132 encePairwiseOnDemand]: 111/116 looper letters, 16 selfloop transitions, 2 changer transitions 3/105 dead transitions. [2022-07-13 21:54:08,492 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 105 transitions, 312 flow [2022-07-13 21:54:08,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:54:08,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 21:54:08,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 482 transitions. [2022-07-13 21:54:08,495 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8310344827586207 [2022-07-13 21:54:08,495 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 482 transitions. [2022-07-13 21:54:08,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 482 transitions. [2022-07-13 21:54:08,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:54:08,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 482 transitions. [2022-07-13 21:54:08,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.4) internal successors, (482), 5 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:08,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:08,497 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:08,497 INFO L186 Difference]: Start difference. First operand has 108 places, 101 transitions, 262 flow. Second operand 5 states and 482 transitions. [2022-07-13 21:54:08,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 105 transitions, 312 flow [2022-07-13 21:54:08,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 105 transitions, 312 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:54:08,499 INFO L242 Difference]: Finished difference. Result has 114 places, 102 transitions, 278 flow [2022-07-13 21:54:08,499 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=114, PETRI_TRANSITIONS=102} [2022-07-13 21:54:08,500 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 7 predicate places. [2022-07-13 21:54:08,500 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 102 transitions, 278 flow [2022-07-13 21:54:08,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.2) internal successors, (466), 5 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:08,500 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:08,500 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:54:08,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 21:54:08,501 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:54:08,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:08,501 INFO L85 PathProgramCache]: Analyzing trace with hash 202686097, now seen corresponding path program 1 times [2022-07-13 21:54:08,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:08,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807268942] [2022-07-13 21:54:08,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:08,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:54:08,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:54:08,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807268942] [2022-07-13 21:54:08,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807268942] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:54:08,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:54:08,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:54:08,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507607745] [2022-07-13 21:54:08,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:54:08,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:54:08,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:54:08,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:54:08,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:54:08,532 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 116 [2022-07-13 21:54:08,532 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 102 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 80.8) internal successors, (404), 5 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:08,532 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:54:08,533 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 116 [2022-07-13 21:54:08,533 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:54:08,763 INFO L129 PetriNetUnfolder]: 95/1239 cut-off events. [2022-07-13 21:54:08,764 INFO L130 PetriNetUnfolder]: For 157/157 co-relation queries the response was YES. [2022-07-13 21:54:08,767 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2267 conditions, 1239 events. 95/1239 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 7812 event pairs, 7 based on Foata normal form. 0/1135 useless extension candidates. Maximal degree in co-relation 2255. Up to 454 conditions per place. [2022-07-13 21:54:08,769 INFO L132 encePairwiseOnDemand]: 105/116 looper letters, 43 selfloop transitions, 6 changer transitions 7/126 dead transitions. [2022-07-13 21:54:08,769 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 126 transitions, 453 flow [2022-07-13 21:54:08,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 21:54:08,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 21:54:08,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 370 transitions. [2022-07-13 21:54:08,770 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7974137931034483 [2022-07-13 21:54:08,770 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 370 transitions. [2022-07-13 21:54:08,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 370 transitions. [2022-07-13 21:54:08,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:54:08,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 370 transitions. [2022-07-13 21:54:08,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:08,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:08,772 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:08,772 INFO L186 Difference]: Start difference. First operand has 114 places, 102 transitions, 278 flow. Second operand 4 states and 370 transitions. [2022-07-13 21:54:08,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 126 transitions, 453 flow [2022-07-13 21:54:08,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 126 transitions, 447 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-13 21:54:08,776 INFO L242 Difference]: Finished difference. Result has 114 places, 105 transitions, 312 flow [2022-07-13 21:54:08,776 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=114, PETRI_TRANSITIONS=105} [2022-07-13 21:54:08,776 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 7 predicate places. [2022-07-13 21:54:08,776 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 105 transitions, 312 flow [2022-07-13 21:54:08,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.8) internal successors, (404), 5 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:08,777 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:54:08,777 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:54:08,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 21:54:08,777 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:54:08,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:54:08,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1585224921, now seen corresponding path program 1 times [2022-07-13 21:54:08,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:54:08,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543780588] [2022-07-13 21:54:08,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:08,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:54:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 21:54:08,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:54:08,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543780588] [2022-07-13 21:54:08,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543780588] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:54:08,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579082820] [2022-07-13 21:54:08,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:54:08,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:54:08,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:54:08,907 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) [2022-07-13 21:54:08,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:54:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:54:08,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 21:54:08,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:54:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 21:54:09,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:54:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 21:54:09,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579082820] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:54:09,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:54:09,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 25 [2022-07-13 21:54:09,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368751446] [2022-07-13 21:54:09,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:54:09,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 21:54:09,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:54:09,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 21:54:09,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-07-13 21:54:09,255 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 116 [2022-07-13 21:54:09,256 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 105 transitions, 312 flow. Second operand has 25 states, 25 states have (on average 47.92) internal successors, (1198), 25 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:54:09,256 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:54:09,256 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 116 [2022-07-13 21:54:09,256 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand