./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/triangular-longer-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 647bb9f2bc4e44b8324ce986a0773d034e56e6ec110a9fd5233f5c8c0dbbeb10 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:01:17,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:01:17,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:01:17,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:01:17,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:01:17,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:01:17,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:01:17,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:01:17,165 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:01:17,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:01:17,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:01:17,171 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:01:17,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:01:17,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:01:17,174 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:01:17,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:01:17,180 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:01:17,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:01:17,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:01:17,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:01:17,188 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:01:17,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:01:17,189 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:01:17,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:01:17,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:01:17,196 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:01:17,196 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:01:17,197 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:01:17,198 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:01:17,198 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:01:17,200 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:01:17,200 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:01:17,202 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:01:17,202 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:01:17,203 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:01:17,203 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:01:17,203 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:01:17,204 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:01:17,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:01:17,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:01:17,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:01:17,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:01:17,208 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:01:17,236 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:01:17,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:01:17,237 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:01:17,237 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:01:17,238 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:01:17,238 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:01:17,238 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:01:17,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:01:17,239 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:01:17,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:01:17,240 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:01:17,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:01:17,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:01:17,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:01:17,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:01:17,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:01:17,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:01:17,241 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:01:17,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:01:17,242 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:01:17,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:01:17,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:01:17,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:01:17,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:01:17,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:01:17,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:01:17,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:01:17,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:01:17,244 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:01:17,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:01:17,244 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:01:17,244 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:01:17,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:01:17,245 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 647bb9f2bc4e44b8324ce986a0773d034e56e6ec110a9fd5233f5c8c0dbbeb10 [2022-07-19 21:01:17,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:01:17,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:01:17,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:01:17,476 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:01:17,476 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:01:17,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longer-2.i [2022-07-19 21:01:17,524 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e579e0f10/7c94f97cbd4c4addbc4b453fc1116f09/FLAG3ace5e7be [2022-07-19 21:01:17,938 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:01:17,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-2.i [2022-07-19 21:01:17,952 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e579e0f10/7c94f97cbd4c4addbc4b453fc1116f09/FLAG3ace5e7be [2022-07-19 21:01:17,964 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e579e0f10/7c94f97cbd4c4addbc4b453fc1116f09 [2022-07-19 21:01:17,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:01:17,967 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:01:17,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:01:17,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:01:17,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:01:17,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:01:17" (1/1) ... [2022-07-19 21:01:17,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1be5121d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:01:17, skipping insertion in model container [2022-07-19 21:01:17,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:01:17" (1/1) ... [2022-07-19 21:01:17,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:01:18,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:01:18,262 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/triangular-longer-2.i[30963,30976] [2022-07-19 21:01:18,264 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:01:18,271 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:01:18,317 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/triangular-longer-2.i[30963,30976] [2022-07-19 21:01:18,323 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:01:18,344 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:01:18,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:01:18 WrapperNode [2022-07-19 21:01:18,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:01:18,346 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:01:18,346 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:01:18,346 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:01:18,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:01:18" (1/1) ... [2022-07-19 21:01:18,360 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:01:18" (1/1) ... [2022-07-19 21:01:18,377 INFO L137 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-07-19 21:01:18,377 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:01:18,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:01:18,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:01:18,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:01:18,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:01:18" (1/1) ... [2022-07-19 21:01:18,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:01:18" (1/1) ... [2022-07-19 21:01:18,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:01:18" (1/1) ... [2022-07-19 21:01:18,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:01:18" (1/1) ... [2022-07-19 21:01:18,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:01:18" (1/1) ... [2022-07-19 21:01:18,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:01:18" (1/1) ... [2022-07-19 21:01:18,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:01:18" (1/1) ... [2022-07-19 21:01:18,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:01:18,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:01:18,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:01:18,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:01:18,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:01:18" (1/1) ... [2022-07-19 21:01:18,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:01:18,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:01:18,445 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) [2022-07-19 21:01:18,447 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 [2022-07-19 21:01:18,475 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-07-19 21:01:18,475 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-07-19 21:01:18,475 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-07-19 21:01:18,475 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-07-19 21:01:18,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:01:18,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:01:18,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:01:18,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:01:18,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:01:18,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:01:18,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:01:18,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:01:18,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:01:18,478 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:01:18,602 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:01:18,603 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:01:18,746 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:01:18,751 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:01:18,751 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 21:01:18,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:01:18 BoogieIcfgContainer [2022-07-19 21:01:18,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:01:18,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:01:18,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:01:18,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:01:18,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:01:17" (1/3) ... [2022-07-19 21:01:18,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63baec4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:01:18, skipping insertion in model container [2022-07-19 21:01:18,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:01:18" (2/3) ... [2022-07-19 21:01:18,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63baec4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:01:18, skipping insertion in model container [2022-07-19 21:01:18,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:01:18" (3/3) ... [2022-07-19 21:01:18,763 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2022-07-19 21:01:18,767 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:01:18,774 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:01:18,774 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:01:18,774 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:01:18,829 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:01:18,869 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 150 flow [2022-07-19 21:01:18,908 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2022-07-19 21:01:18,909 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:01:18,913 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 68 events. 5/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2022-07-19 21:01:18,913 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 150 flow [2022-07-19 21:01:18,918 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 142 flow [2022-07-19 21:01:18,930 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:01:18,936 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@67530e6d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@380ba5c5 [2022-07-19 21:01:18,936 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:01:18,956 INFO L129 PetriNetUnfolder]: 4/58 cut-off events. [2022-07-19 21:01:18,957 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:01:18,957 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:01:18,958 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] [2022-07-19 21:01:18,959 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:01:18,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:01:18,963 INFO L85 PathProgramCache]: Analyzing trace with hash 398220865, now seen corresponding path program 1 times [2022-07-19 21:01:18,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:01:18,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18010358] [2022-07-19 21:01:18,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:01:18,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:01:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:01:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:01:19,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:01:19,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18010358] [2022-07-19 21:01:19,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18010358] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:01:19,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:01:19,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:01:19,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416726083] [2022-07-19 21:01:19,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:01:19,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:01:19,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:01:19,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:01:19,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:01:19,330 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-19 21:01:19,333 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:19,333 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:01:19,333 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-19 21:01:19,334 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:01:19,453 INFO L129 PetriNetUnfolder]: 42/203 cut-off events. [2022-07-19 21:01:19,453 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:01:19,454 INFO L84 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 203 events. 42/203 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 761 event pairs, 3 based on Foata normal form. 45/231 useless extension candidates. Maximal degree in co-relation 250. Up to 28 conditions per place. [2022-07-19 21:01:19,456 INFO L132 encePairwiseOnDemand]: 59/70 looper letters, 22 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2022-07-19 21:01:19,456 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 271 flow [2022-07-19 21:01:19,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:01:19,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:01:19,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 613 transitions. [2022-07-19 21:01:19,467 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8757142857142857 [2022-07-19 21:01:19,468 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 613 transitions. [2022-07-19 21:01:19,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 613 transitions. [2022-07-19 21:01:19,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:01:19,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 613 transitions. [2022-07-19 21:01:19,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.3) internal successors, (613), 10 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:19,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:19,480 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:19,482 INFO L186 Difference]: Start difference. First operand has 70 places, 68 transitions, 142 flow. Second operand 10 states and 613 transitions. [2022-07-19 21:01:19,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 271 flow [2022-07-19 21:01:19,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:01:19,486 INFO L242 Difference]: Finished difference. Result has 85 places, 85 transitions, 276 flow [2022-07-19 21:01:19,488 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2022-07-19 21:01:19,490 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2022-07-19 21:01:19,490 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 276 flow [2022-07-19 21:01:19,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:19,491 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:01:19,491 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] [2022-07-19 21:01:19,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:01:19,492 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:01:19,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:01:19,492 INFO L85 PathProgramCache]: Analyzing trace with hash 245149124, now seen corresponding path program 1 times [2022-07-19 21:01:19,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:01:19,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713307816] [2022-07-19 21:01:19,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:01:19,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:01:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:01:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:01:19,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:01:19,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713307816] [2022-07-19 21:01:19,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713307816] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:01:19,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:01:19,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:01:19,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97607363] [2022-07-19 21:01:19,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:01:19,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:01:19,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:01:19,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:01:19,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:01:19,622 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-19 21:01:19,623 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:19,623 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:01:19,623 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-19 21:01:19,623 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:01:19,741 INFO L129 PetriNetUnfolder]: 46/218 cut-off events. [2022-07-19 21:01:19,741 INFO L130 PetriNetUnfolder]: For 115/120 co-relation queries the response was YES. [2022-07-19 21:01:19,744 INFO L84 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 218 events. 46/218 cut-off events. For 115/120 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 854 event pairs, 0 based on Foata normal form. 3/206 useless extension candidates. Maximal degree in co-relation 377. Up to 35 conditions per place. [2022-07-19 21:01:19,746 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 16 selfloop transitions, 9 changer transitions 40/110 dead transitions. [2022-07-19 21:01:19,746 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 110 transitions, 508 flow [2022-07-19 21:01:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:01:19,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:01:19,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 475 transitions. [2022-07-19 21:01:19,748 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8482142857142857 [2022-07-19 21:01:19,748 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 475 transitions. [2022-07-19 21:01:19,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 475 transitions. [2022-07-19 21:01:19,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:01:19,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 475 transitions. [2022-07-19 21:01:19,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 59.375) internal successors, (475), 8 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) [2022-07-19 21:01:19,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:19,752 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:19,752 INFO L186 Difference]: Start difference. First operand has 85 places, 85 transitions, 276 flow. Second operand 8 states and 475 transitions. [2022-07-19 21:01:19,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 110 transitions, 508 flow [2022-07-19 21:01:19,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:01:19,757 INFO L242 Difference]: Finished difference. Result has 96 places, 67 transitions, 237 flow [2022-07-19 21:01:19,758 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=237, PETRI_PLACES=96, PETRI_TRANSITIONS=67} [2022-07-19 21:01:19,758 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2022-07-19 21:01:19,758 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 67 transitions, 237 flow [2022-07-19 21:01:19,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:19,759 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:01:19,759 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] [2022-07-19 21:01:19,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:01:19,760 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:01:19,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:01:19,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1444168350, now seen corresponding path program 1 times [2022-07-19 21:01:19,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:01:19,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986440885] [2022-07-19 21:01:19,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:01:19,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:01:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:01:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:01:19,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:01:19,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986440885] [2022-07-19 21:01:19,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986440885] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:01:19,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:01:19,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:01:19,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159168532] [2022-07-19 21:01:19,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:01:19,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:01:19,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:01:19,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:01:19,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:01:19,853 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-19 21:01:19,854 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 67 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:19,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:01:19,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-19 21:01:19,854 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:01:19,937 INFO L129 PetriNetUnfolder]: 37/196 cut-off events. [2022-07-19 21:01:19,937 INFO L130 PetriNetUnfolder]: For 265/276 co-relation queries the response was YES. [2022-07-19 21:01:19,938 INFO L84 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 196 events. 37/196 cut-off events. For 265/276 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 654 event pairs, 0 based on Foata normal form. 12/190 useless extension candidates. Maximal degree in co-relation 362. Up to 35 conditions per place. [2022-07-19 21:01:19,939 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 23 selfloop transitions, 11 changer transitions 8/87 dead transitions. [2022-07-19 21:01:19,939 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 457 flow [2022-07-19 21:01:19,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:01:19,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:01:19,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2022-07-19 21:01:19,942 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2022-07-19 21:01:19,942 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2022-07-19 21:01:19,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2022-07-19 21:01:19,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:01:19,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2022-07-19 21:01:19,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:19,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:19,947 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:19,947 INFO L186 Difference]: Start difference. First operand has 96 places, 67 transitions, 237 flow. Second operand 9 states and 530 transitions. [2022-07-19 21:01:19,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 457 flow [2022-07-19 21:01:19,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 387 flow, removed 25 selfloop flow, removed 9 redundant places. [2022-07-19 21:01:19,954 INFO L242 Difference]: Finished difference. Result has 86 places, 72 transitions, 289 flow [2022-07-19 21:01:19,954 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=289, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2022-07-19 21:01:19,955 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2022-07-19 21:01:19,956 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 289 flow [2022-07-19 21:01:19,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:19,956 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:01:19,956 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] [2022-07-19 21:01:19,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:01:19,957 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:01:19,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:01:19,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1245653052, now seen corresponding path program 2 times [2022-07-19 21:01:19,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:01:19,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916047146] [2022-07-19 21:01:19,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:01:19,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:01:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:01:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:01:20,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:01:20,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916047146] [2022-07-19 21:01:20,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916047146] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:01:20,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:01:20,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:01:20,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583425870] [2022-07-19 21:01:20,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:01:20,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:01:20,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:01:20,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:01:20,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:01:20,079 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-19 21:01:20,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:20,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:01:20,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-19 21:01:20,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:01:20,199 INFO L129 PetriNetUnfolder]: 34/213 cut-off events. [2022-07-19 21:01:20,199 INFO L130 PetriNetUnfolder]: For 308/344 co-relation queries the response was YES. [2022-07-19 21:01:20,203 INFO L84 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 213 events. 34/213 cut-off events. For 308/344 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 790 event pairs, 0 based on Foata normal form. 25/218 useless extension candidates. Maximal degree in co-relation 426. Up to 37 conditions per place. [2022-07-19 21:01:20,214 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 21 selfloop transitions, 15 changer transitions 11/92 dead transitions. [2022-07-19 21:01:20,214 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 92 transitions, 536 flow [2022-07-19 21:01:20,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:01:20,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:01:20,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 585 transitions. [2022-07-19 21:01:20,216 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8357142857142857 [2022-07-19 21:01:20,216 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 585 transitions. [2022-07-19 21:01:20,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 585 transitions. [2022-07-19 21:01:20,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:01:20,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 585 transitions. [2022-07-19 21:01:20,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.5) internal successors, (585), 10 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:20,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:20,224 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:20,224 INFO L186 Difference]: Start difference. First operand has 86 places, 72 transitions, 289 flow. Second operand 10 states and 585 transitions. [2022-07-19 21:01:20,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 92 transitions, 536 flow [2022-07-19 21:01:20,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 92 transitions, 511 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-07-19 21:01:20,231 INFO L242 Difference]: Finished difference. Result has 95 places, 77 transitions, 370 flow [2022-07-19 21:01:20,231 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=370, PETRI_PLACES=95, PETRI_TRANSITIONS=77} [2022-07-19 21:01:20,233 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 25 predicate places. [2022-07-19 21:01:20,233 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 77 transitions, 370 flow [2022-07-19 21:01:20,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:20,234 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:01:20,234 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] [2022-07-19 21:01:20,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:01:20,235 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:01:20,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:01:20,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1461818299, now seen corresponding path program 1 times [2022-07-19 21:01:20,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:01:20,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501562205] [2022-07-19 21:01:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:01:20,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:01:20,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:01:20,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:01:20,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:01:20,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501562205] [2022-07-19 21:01:20,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501562205] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:01:20,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:01:20,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:01:20,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880255813] [2022-07-19 21:01:20,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:01:20,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:01:20,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:01:20,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:01:20,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:01:20,371 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-19 21:01:20,372 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 77 transitions, 370 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:20,372 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:01:20,372 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-19 21:01:20,372 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:01:20,483 INFO L129 PetriNetUnfolder]: 47/248 cut-off events. [2022-07-19 21:01:20,483 INFO L130 PetriNetUnfolder]: For 546/567 co-relation queries the response was YES. [2022-07-19 21:01:20,484 INFO L84 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 248 events. 47/248 cut-off events. For 546/567 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 973 event pairs, 1 based on Foata normal form. 19/243 useless extension candidates. Maximal degree in co-relation 561. Up to 55 conditions per place. [2022-07-19 21:01:20,485 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 25 selfloop transitions, 23 changer transitions 8/101 dead transitions. [2022-07-19 21:01:20,485 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 101 transitions, 694 flow [2022-07-19 21:01:20,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:01:20,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:01:20,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 644 transitions. [2022-07-19 21:01:20,488 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8363636363636363 [2022-07-19 21:01:20,488 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 644 transitions. [2022-07-19 21:01:20,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 644 transitions. [2022-07-19 21:01:20,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:01:20,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 644 transitions. [2022-07-19 21:01:20,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.54545454545455) internal successors, (644), 11 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:20,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:20,491 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:20,491 INFO L186 Difference]: Start difference. First operand has 95 places, 77 transitions, 370 flow. Second operand 11 states and 644 transitions. [2022-07-19 21:01:20,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 101 transitions, 694 flow [2022-07-19 21:01:20,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 101 transitions, 647 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-07-19 21:01:20,496 INFO L242 Difference]: Finished difference. Result has 104 places, 83 transitions, 485 flow [2022-07-19 21:01:20,496 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=485, PETRI_PLACES=104, PETRI_TRANSITIONS=83} [2022-07-19 21:01:20,498 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 34 predicate places. [2022-07-19 21:01:20,498 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 83 transitions, 485 flow [2022-07-19 21:01:20,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:20,498 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:01:20,499 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] [2022-07-19 21:01:20,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:01:20,499 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:01:20,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:01:20,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1283973881, now seen corresponding path program 2 times [2022-07-19 21:01:20,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:01:20,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749998798] [2022-07-19 21:01:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:01:20,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:01:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:01:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:01:20,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:01:20,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749998798] [2022-07-19 21:01:20,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749998798] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:01:20,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:01:20,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:01:20,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208624660] [2022-07-19 21:01:20,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:01:20,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:01:20,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:01:20,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:01:20,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:01:20,597 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-19 21:01:20,597 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 83 transitions, 485 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:20,598 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:01:20,598 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-19 21:01:20,598 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:01:20,713 INFO L129 PetriNetUnfolder]: 41/246 cut-off events. [2022-07-19 21:01:20,714 INFO L130 PetriNetUnfolder]: For 953/980 co-relation queries the response was YES. [2022-07-19 21:01:20,715 INFO L84 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 246 events. 41/246 cut-off events. For 953/980 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 993 event pairs, 1 based on Foata normal form. 24/246 useless extension candidates. Maximal degree in co-relation 667. Up to 51 conditions per place. [2022-07-19 21:01:20,717 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 23 selfloop transitions, 23 changer transitions 11/102 dead transitions. [2022-07-19 21:01:20,717 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 102 transitions, 868 flow [2022-07-19 21:01:20,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:01:20,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:01:20,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 638 transitions. [2022-07-19 21:01:20,719 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-07-19 21:01:20,719 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 638 transitions. [2022-07-19 21:01:20,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 638 transitions. [2022-07-19 21:01:20,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:01:20,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 638 transitions. [2022-07-19 21:01:20,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:20,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:20,724 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:20,724 INFO L186 Difference]: Start difference. First operand has 104 places, 83 transitions, 485 flow. Second operand 11 states and 638 transitions. [2022-07-19 21:01:20,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 102 transitions, 868 flow [2022-07-19 21:01:20,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 102 transitions, 805 flow, removed 22 selfloop flow, removed 5 redundant places. [2022-07-19 21:01:20,729 INFO L242 Difference]: Finished difference. Result has 111 places, 85 transitions, 555 flow [2022-07-19 21:01:20,730 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=555, PETRI_PLACES=111, PETRI_TRANSITIONS=85} [2022-07-19 21:01:20,730 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 41 predicate places. [2022-07-19 21:01:20,730 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 85 transitions, 555 flow [2022-07-19 21:01:20,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:20,731 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:01:20,735 INFO L200 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:01:20,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:01:20,736 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:01:20,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:01:20,736 INFO L85 PathProgramCache]: Analyzing trace with hash -495311077, now seen corresponding path program 1 times [2022-07-19 21:01:20,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:01:20,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523821059] [2022-07-19 21:01:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:01:20,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:01:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:01:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:01:20,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:01:20,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523821059] [2022-07-19 21:01:20,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523821059] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:01:20,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333037132] [2022-07-19 21:01:20,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:01:20,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:01:20,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:01:20,850 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) [2022-07-19 21:01:20,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:01:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:01:20,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:01:20,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:01:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:01:21,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:01:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:01:21,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333037132] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:01:21,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:01:21,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-07-19 21:01:21,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105037174] [2022-07-19 21:01:21,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:01:21,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:01:21,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:01:21,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:01:21,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:01:21,251 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-19 21:01:21,252 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 85 transitions, 555 flow. Second operand has 14 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:21,252 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:01:21,252 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-19 21:01:21,252 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:01:21,486 INFO L129 PetriNetUnfolder]: 55/317 cut-off events. [2022-07-19 21:01:21,486 INFO L130 PetriNetUnfolder]: For 1631/1674 co-relation queries the response was YES. [2022-07-19 21:01:21,488 INFO L84 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 317 events. 55/317 cut-off events. For 1631/1674 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1287 event pairs, 1 based on Foata normal form. 25/311 useless extension candidates. Maximal degree in co-relation 943. Up to 67 conditions per place. [2022-07-19 21:01:21,489 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 27 selfloop transitions, 38 changer transitions 14/124 dead transitions. [2022-07-19 21:01:21,490 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 124 transitions, 1327 flow [2022-07-19 21:01:21,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 21:01:21,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-19 21:01:21,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1159 transitions. [2022-07-19 21:01:21,492 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8278571428571428 [2022-07-19 21:01:21,492 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1159 transitions. [2022-07-19 21:01:21,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1159 transitions. [2022-07-19 21:01:21,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:01:21,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1159 transitions. [2022-07-19 21:01:21,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.95) internal successors, (1159), 20 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:21,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:21,497 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:21,497 INFO L186 Difference]: Start difference. First operand has 111 places, 85 transitions, 555 flow. Second operand 20 states and 1159 transitions. [2022-07-19 21:01:21,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 124 transitions, 1327 flow [2022-07-19 21:01:21,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 124 transitions, 1190 flow, removed 48 selfloop flow, removed 10 redundant places. [2022-07-19 21:01:21,504 INFO L242 Difference]: Finished difference. Result has 127 places, 101 transitions, 862 flow [2022-07-19 21:01:21,504 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=862, PETRI_PLACES=127, PETRI_TRANSITIONS=101} [2022-07-19 21:01:21,504 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 57 predicate places. [2022-07-19 21:01:21,505 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 101 transitions, 862 flow [2022-07-19 21:01:21,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:21,505 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:01:21,505 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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, 1, 1, 1, 1] [2022-07-19 21:01:21,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 21:01:21,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:01:21,719 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:01:21,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:01:21,719 INFO L85 PathProgramCache]: Analyzing trace with hash -2022110288, now seen corresponding path program 1 times [2022-07-19 21:01:21,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:01:21,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673731973] [2022-07-19 21:01:21,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:01:21,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:01:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:01:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:21,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:01:21,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673731973] [2022-07-19 21:01:21,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673731973] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:01:21,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478382426] [2022-07-19 21:01:21,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:01:21,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:01:21,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:01:21,833 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) [2022-07-19 21:01:21,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:01:21,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:01:21,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 21:01:21,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:01:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:22,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:01:22,289 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:22,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478382426] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:01:22,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:01:22,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-07-19 21:01:22,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934968196] [2022-07-19 21:01:22,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:01:22,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 21:01:22,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:01:22,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 21:01:22,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-07-19 21:01:22,292 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-19 21:01:22,293 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 101 transitions, 862 flow. Second operand has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:22,293 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:01:22,293 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-19 21:01:22,293 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:01:22,593 INFO L129 PetriNetUnfolder]: 77/484 cut-off events. [2022-07-19 21:01:22,593 INFO L130 PetriNetUnfolder]: For 3478/3519 co-relation queries the response was YES. [2022-07-19 21:01:22,595 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1636 conditions, 484 events. 77/484 cut-off events. For 3478/3519 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2036 event pairs, 0 based on Foata normal form. 26/460 useless extension candidates. Maximal degree in co-relation 1573. Up to 103 conditions per place. [2022-07-19 21:01:22,597 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 58 selfloop transitions, 27 changer transitions 26/156 dead transitions. [2022-07-19 21:01:22,597 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 156 transitions, 2114 flow [2022-07-19 21:01:22,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-19 21:01:22,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-19 21:01:22,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1450 transitions. [2022-07-19 21:01:22,600 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-07-19 21:01:22,601 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1450 transitions. [2022-07-19 21:01:22,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1450 transitions. [2022-07-19 21:01:22,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:01:22,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1450 transitions. [2022-07-19 21:01:22,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 58.0) internal successors, (1450), 25 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:22,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:22,607 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:22,607 INFO L186 Difference]: Start difference. First operand has 127 places, 101 transitions, 862 flow. Second operand 25 states and 1450 transitions. [2022-07-19 21:01:22,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 156 transitions, 2114 flow [2022-07-19 21:01:22,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 156 transitions, 1699 flow, removed 190 selfloop flow, removed 12 redundant places. [2022-07-19 21:01:22,616 INFO L242 Difference]: Finished difference. Result has 153 places, 115 transitions, 992 flow [2022-07-19 21:01:22,616 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=992, PETRI_PLACES=153, PETRI_TRANSITIONS=115} [2022-07-19 21:01:22,617 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 83 predicate places. [2022-07-19 21:01:22,617 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 115 transitions, 992 flow [2022-07-19 21:01:22,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:22,618 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:01:22,618 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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, 1, 1, 1, 1] [2022-07-19 21:01:22,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:01:22,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-19 21:01:22,828 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:01:22,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:01:22,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1596067542, now seen corresponding path program 2 times [2022-07-19 21:01:22,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:01:22,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507414357] [2022-07-19 21:01:22,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:01:22,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:01:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:01:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:22,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:01:22,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507414357] [2022-07-19 21:01:22,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507414357] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:01:22,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216841365] [2022-07-19 21:01:22,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:01:22,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:01:22,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:01:22,921 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:01:22,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:01:22,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:01:22,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:01:22,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 21:01:22,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:01:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:23,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:01:23,262 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:23,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216841365] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:01:23,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:01:23,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-07-19 21:01:23,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081865376] [2022-07-19 21:01:23,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:01:23,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:01:23,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:01:23,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:01:23,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:01:23,267 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-19 21:01:23,268 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 115 transitions, 992 flow. Second operand has 18 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:23,268 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:01:23,268 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-19 21:01:23,268 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:01:23,765 INFO L129 PetriNetUnfolder]: 115/731 cut-off events. [2022-07-19 21:01:23,765 INFO L130 PetriNetUnfolder]: For 12521/12666 co-relation queries the response was YES. [2022-07-19 21:01:23,769 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2997 conditions, 731 events. 115/731 cut-off events. For 12521/12666 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4303 event pairs, 0 based on Foata normal form. 28/685 useless extension candidates. Maximal degree in co-relation 2917. Up to 151 conditions per place. [2022-07-19 21:01:23,773 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 59 selfloop transitions, 74 changer transitions 26/204 dead transitions. [2022-07-19 21:01:23,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 204 transitions, 3336 flow [2022-07-19 21:01:23,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-19 21:01:23,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-19 21:01:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1851 transitions. [2022-07-19 21:01:23,777 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8263392857142857 [2022-07-19 21:01:23,777 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1851 transitions. [2022-07-19 21:01:23,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1851 transitions. [2022-07-19 21:01:23,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:01:23,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1851 transitions. [2022-07-19 21:01:23,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.84375) internal successors, (1851), 32 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:23,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 70.0) internal successors, (2310), 33 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:23,786 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 70.0) internal successors, (2310), 33 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:23,787 INFO L186 Difference]: Start difference. First operand has 153 places, 115 transitions, 992 flow. Second operand 32 states and 1851 transitions. [2022-07-19 21:01:23,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 204 transitions, 3336 flow [2022-07-19 21:01:23,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 204 transitions, 2811 flow, removed 253 selfloop flow, removed 13 redundant places. [2022-07-19 21:01:23,817 INFO L242 Difference]: Finished difference. Result has 185 places, 153 transitions, 1757 flow [2022-07-19 21:01:23,817 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1757, PETRI_PLACES=185, PETRI_TRANSITIONS=153} [2022-07-19 21:01:23,818 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 115 predicate places. [2022-07-19 21:01:23,818 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 153 transitions, 1757 flow [2022-07-19 21:01:23,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:23,819 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:01:23,819 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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, 1, 1, 1, 1] [2022-07-19 21:01:23,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:01:24,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:01:24,042 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:01:24,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:01:24,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1423924408, now seen corresponding path program 3 times [2022-07-19 21:01:24,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:01:24,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241802067] [2022-07-19 21:01:24,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:01:24,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:01:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:01:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:24,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:01:24,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241802067] [2022-07-19 21:01:24,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241802067] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:01:24,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730390357] [2022-07-19 21:01:24,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:01:24,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:01:24,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:01:24,123 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:01:24,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:01:24,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 21:01:24,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:01:24,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 21:01:24,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:01:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:24,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:01:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:24,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730390357] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:01:24,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:01:24,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-07-19 21:01:24,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861857217] [2022-07-19 21:01:24,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:01:24,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:01:24,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:01:24,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:01:24,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:01:24,406 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-19 21:01:24,407 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 153 transitions, 1757 flow. Second operand has 18 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:24,407 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:01:24,408 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-19 21:01:24,408 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:01:25,052 INFO L129 PetriNetUnfolder]: 156/982 cut-off events. [2022-07-19 21:01:25,052 INFO L130 PetriNetUnfolder]: For 30891/31059 co-relation queries the response was YES. [2022-07-19 21:01:25,058 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4892 conditions, 982 events. 156/982 cut-off events. For 30891/31059 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 6521 event pairs, 0 based on Foata normal form. 37/921 useless extension candidates. Maximal degree in co-relation 4796. Up to 201 conditions per place. [2022-07-19 21:01:25,064 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 49 selfloop transitions, 130 changer transitions 26/250 dead transitions. [2022-07-19 21:01:25,064 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 250 transitions, 5261 flow [2022-07-19 21:01:25,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-19 21:01:25,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-19 21:01:25,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2143 transitions. [2022-07-19 21:01:25,068 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8274131274131274 [2022-07-19 21:01:25,068 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2143 transitions. [2022-07-19 21:01:25,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2143 transitions. [2022-07-19 21:01:25,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:01:25,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2143 transitions. [2022-07-19 21:01:25,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 57.91891891891892) internal successors, (2143), 37 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:25,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:25,077 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:25,077 INFO L186 Difference]: Start difference. First operand has 185 places, 153 transitions, 1757 flow. Second operand 37 states and 2143 transitions. [2022-07-19 21:01:25,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 250 transitions, 5261 flow [2022-07-19 21:01:25,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 250 transitions, 4482 flow, removed 379 selfloop flow, removed 15 redundant places. [2022-07-19 21:01:25,128 INFO L242 Difference]: Finished difference. Result has 221 places, 195 transitions, 2799 flow [2022-07-19 21:01:25,128 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2799, PETRI_PLACES=221, PETRI_TRANSITIONS=195} [2022-07-19 21:01:25,129 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 151 predicate places. [2022-07-19 21:01:25,129 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 195 transitions, 2799 flow [2022-07-19 21:01:25,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:25,130 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:01:25,130 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2022-07-19 21:01:25,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:01:25,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:01:25,344 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:01:25,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:01:25,344 INFO L85 PathProgramCache]: Analyzing trace with hash -129980678, now seen corresponding path program 4 times [2022-07-19 21:01:25,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:01:25,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277900685] [2022-07-19 21:01:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:01:25,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:01:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:01:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:01:25,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:01:25,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277900685] [2022-07-19 21:01:25,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277900685] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:01:25,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346279168] [2022-07-19 21:01:25,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:01:25,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:01:25,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:01:25,439 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:01:25,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:01:25,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:01:25,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:01:25,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 21:01:25,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:01:25,615 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:01:25,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:01:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:01:25,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346279168] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:01:25,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:01:25,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2022-07-19 21:01:25,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977874203] [2022-07-19 21:01:25,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:01:25,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 21:01:25,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:01:25,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 21:01:25,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2022-07-19 21:01:25,800 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-19 21:01:25,801 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 195 transitions, 2799 flow. Second operand has 26 states, 26 states have (on average 56.30769230769231) internal successors, (1464), 26 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:25,802 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:01:25,802 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-19 21:01:25,802 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:01:26,843 INFO L129 PetriNetUnfolder]: 218/1389 cut-off events. [2022-07-19 21:01:26,843 INFO L130 PetriNetUnfolder]: For 74965/75273 co-relation queries the response was YES. [2022-07-19 21:01:26,853 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8481 conditions, 1389 events. 218/1389 cut-off events. For 74965/75273 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 9203 event pairs, 1 based on Foata normal form. 41/1287 useless extension candidates. Maximal degree in co-relation 8371. Up to 281 conditions per place. [2022-07-19 21:01:26,862 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 62 selfloop transitions, 185 changer transitions 32/324 dead transitions. [2022-07-19 21:01:26,862 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 324 transitions, 9330 flow [2022-07-19 21:01:26,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-19 21:01:26,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-07-19 21:01:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2893 transitions. [2022-07-19 21:01:26,865 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8265714285714286 [2022-07-19 21:01:26,865 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2893 transitions. [2022-07-19 21:01:26,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2893 transitions. [2022-07-19 21:01:26,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:01:26,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2893 transitions. [2022-07-19 21:01:26,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 57.86) internal successors, (2893), 50 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:26,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:26,875 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:26,875 INFO L186 Difference]: Start difference. First operand has 221 places, 195 transitions, 2799 flow. Second operand 50 states and 2893 transitions. [2022-07-19 21:01:26,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 324 transitions, 9330 flow [2022-07-19 21:01:26,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 324 transitions, 6859 flow, removed 1209 selfloop flow, removed 20 redundant places. [2022-07-19 21:01:26,965 INFO L242 Difference]: Finished difference. Result has 272 places, 256 transitions, 4116 flow [2022-07-19 21:01:26,965 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2218, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=4116, PETRI_PLACES=272, PETRI_TRANSITIONS=256} [2022-07-19 21:01:26,966 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 202 predicate places. [2022-07-19 21:01:26,966 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 256 transitions, 4116 flow [2022-07-19 21:01:26,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.30769230769231) internal successors, (1464), 26 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:26,966 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:01:26,966 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:01:26,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:01:27,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-19 21:01:27,183 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:01:27,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:01:27,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1070308400, now seen corresponding path program 5 times [2022-07-19 21:01:27,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:01:27,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015707497] [2022-07-19 21:01:27,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:01:27,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:01:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:01:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:27,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:01:27,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015707497] [2022-07-19 21:01:27,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015707497] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:01:27,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162289545] [2022-07-19 21:01:27,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:01:27,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:01:27,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:01:27,463 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:01:27,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:01:27,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-19 21:01:27,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:01:27,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-19 21:01:27,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:01:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:27,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:01:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:28,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162289545] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:01:28,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:01:28,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 41 [2022-07-19 21:01:28,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651504127] [2022-07-19 21:01:28,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:01:28,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-19 21:01:28,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:01:28,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-19 21:01:28,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 21:01:28,264 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-19 21:01:28,266 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 256 transitions, 4116 flow. Second operand has 41 states, 41 states have (on average 56.24390243902439) internal successors, (2306), 41 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:28,266 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:01:28,266 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-19 21:01:28,266 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:01:28,952 INFO L129 PetriNetUnfolder]: 226/1529 cut-off events. [2022-07-19 21:01:28,952 INFO L130 PetriNetUnfolder]: For 100669/100893 co-relation queries the response was YES. [2022-07-19 21:01:28,964 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9573 conditions, 1529 events. 226/1529 cut-off events. For 100669/100893 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 9915 event pairs, 0 based on Foata normal form. 24/1389 useless extension candidates. Maximal degree in co-relation 9442. Up to 305 conditions per place. [2022-07-19 21:01:28,974 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 206 selfloop transitions, 47 changer transitions 20/318 dead transitions. [2022-07-19 21:01:28,975 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 318 transitions, 8460 flow [2022-07-19 21:01:28,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-19 21:01:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-19 21:01:28,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1902 transitions. [2022-07-19 21:01:28,977 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8233766233766234 [2022-07-19 21:01:28,977 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1902 transitions. [2022-07-19 21:01:28,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1902 transitions. [2022-07-19 21:01:28,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:01:28,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1902 transitions. [2022-07-19 21:01:28,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 57.63636363636363) internal successors, (1902), 33 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:28,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:28,983 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:28,984 INFO L186 Difference]: Start difference. First operand has 272 places, 256 transitions, 4116 flow. Second operand 33 states and 1902 transitions. [2022-07-19 21:01:28,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 318 transitions, 8460 flow [2022-07-19 21:01:29,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 318 transitions, 6778 flow, removed 814 selfloop flow, removed 18 redundant places. [2022-07-19 21:01:29,195 INFO L242 Difference]: Finished difference. Result has 290 places, 272 transitions, 3941 flow [2022-07-19 21:01:29,196 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3300, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3941, PETRI_PLACES=290, PETRI_TRANSITIONS=272} [2022-07-19 21:01:29,196 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 220 predicate places. [2022-07-19 21:01:29,196 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 272 transitions, 3941 flow [2022-07-19 21:01:29,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 56.24390243902439) internal successors, (2306), 41 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:29,197 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:01:29,198 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:01:29,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:01:29,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:01:29,405 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:01:29,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:01:29,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1692537336, now seen corresponding path program 6 times [2022-07-19 21:01:29,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:01:29,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659015260] [2022-07-19 21:01:29,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:01:29,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:01:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:01:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:29,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:01:29,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659015260] [2022-07-19 21:01:29,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659015260] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:01:29,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198388806] [2022-07-19 21:01:29,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:01:29,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:01:29,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:01:29,643 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:01:29,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:01:29,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-19 21:01:29,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:01:29,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-19 21:01:29,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:01:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:29,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:01:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:30,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198388806] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:01:30,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:01:30,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 41 [2022-07-19 21:01:30,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462267802] [2022-07-19 21:01:30,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:01:30,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-19 21:01:30,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:01:30,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-19 21:01:30,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1305, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 21:01:30,464 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-19 21:01:30,466 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 272 transitions, 3941 flow. Second operand has 41 states, 41 states have (on average 56.26829268292683) internal successors, (2307), 41 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:30,466 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:01:30,466 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-19 21:01:30,466 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:01:31,587 INFO L129 PetriNetUnfolder]: 310/2270 cut-off events. [2022-07-19 21:01:31,588 INFO L130 PetriNetUnfolder]: For 147849/148062 co-relation queries the response was YES. [2022-07-19 21:01:31,653 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13349 conditions, 2270 events. 310/2270 cut-off events. For 147849/148062 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 17241 event pairs, 0 based on Foata normal form. 41/2066 useless extension candidates. Maximal degree in co-relation 13214. Up to 463 conditions per place. [2022-07-19 21:01:31,672 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 164 selfloop transitions, 202 changer transitions 20/431 dead transitions. [2022-07-19 21:01:31,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 431 transitions, 10657 flow [2022-07-19 21:01:31,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-19 21:01:31,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-07-19 21:01:31,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3102 transitions. [2022-07-19 21:01:31,679 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8206349206349206 [2022-07-19 21:01:31,680 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3102 transitions. [2022-07-19 21:01:31,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3102 transitions. [2022-07-19 21:01:31,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:01:31,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3102 transitions. [2022-07-19 21:01:31,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 57.44444444444444) internal successors, (3102), 54 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:31,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 70.0) internal successors, (3850), 55 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:31,694 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 70.0) internal successors, (3850), 55 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:31,694 INFO L186 Difference]: Start difference. First operand has 290 places, 272 transitions, 3941 flow. Second operand 54 states and 3102 transitions. [2022-07-19 21:01:31,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 431 transitions, 10657 flow [2022-07-19 21:01:31,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 431 transitions, 9906 flow, removed 348 selfloop flow, removed 21 redundant places. [2022-07-19 21:01:31,913 INFO L242 Difference]: Finished difference. Result has 339 places, 360 transitions, 5938 flow [2022-07-19 21:01:31,913 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=5938, PETRI_PLACES=339, PETRI_TRANSITIONS=360} [2022-07-19 21:01:31,915 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 269 predicate places. [2022-07-19 21:01:31,915 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 360 transitions, 5938 flow [2022-07-19 21:01:31,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 56.26829268292683) internal successors, (2307), 41 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:31,915 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:01:31,916 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:01:31,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:01:32,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:01:32,127 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:01:32,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:01:32,127 INFO L85 PathProgramCache]: Analyzing trace with hash 120225478, now seen corresponding path program 7 times [2022-07-19 21:01:32,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:01:32,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575704727] [2022-07-19 21:01:32,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:01:32,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:01:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:01:32,367 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:32,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:01:32,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575704727] [2022-07-19 21:01:32,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575704727] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:01:32,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927185007] [2022-07-19 21:01:32,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:01:32,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:01:32,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:01:32,369 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:01:32,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:01:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:01:32,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-19 21:01:32,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:01:32,596 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:32,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:01:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:33,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927185007] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:01:33,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:01:33,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 41 [2022-07-19 21:01:33,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134747584] [2022-07-19 21:01:33,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:01:33,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-19 21:01:33,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:01:33,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-19 21:01:33,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1375, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 21:01:33,003 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-19 21:01:33,004 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 360 transitions, 5938 flow. Second operand has 41 states, 41 states have (on average 56.26829268292683) internal successors, (2307), 41 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:33,004 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:01:33,004 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-19 21:01:33,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:01:34,595 INFO L129 PetriNetUnfolder]: 402/3013 cut-off events. [2022-07-19 21:01:34,596 INFO L130 PetriNetUnfolder]: For 255633/255940 co-relation queries the response was YES. [2022-07-19 21:01:34,624 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19863 conditions, 3013 events. 402/3013 cut-off events. For 255633/255940 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 25086 event pairs, 0 based on Foata normal form. 55/2744 useless extension candidates. Maximal degree in co-relation 19709. Up to 639 conditions per place. [2022-07-19 21:01:34,649 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 113 selfloop transitions, 350 changer transitions 26/534 dead transitions. [2022-07-19 21:01:34,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 534 transitions, 14901 flow [2022-07-19 21:01:34,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-19 21:01:34,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-19 21:01:34,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3454 transitions. [2022-07-19 21:01:34,653 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8223809523809524 [2022-07-19 21:01:34,653 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3454 transitions. [2022-07-19 21:01:34,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3454 transitions. [2022-07-19 21:01:34,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:01:34,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3454 transitions. [2022-07-19 21:01:34,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 57.56666666666667) internal successors, (3454), 60 states have internal predecessors, (3454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:34,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 70.0) internal successors, (4270), 61 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:34,663 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 70.0) internal successors, (4270), 61 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:34,663 INFO L186 Difference]: Start difference. First operand has 339 places, 360 transitions, 5938 flow. Second operand 60 states and 3454 transitions. [2022-07-19 21:01:34,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 534 transitions, 14901 flow [2022-07-19 21:01:35,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 534 transitions, 13418 flow, removed 676 selfloop flow, removed 21 redundant places. [2022-07-19 21:01:35,195 INFO L242 Difference]: Finished difference. Result has 393 places, 452 transitions, 8300 flow [2022-07-19 21:01:35,195 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=5159, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=8300, PETRI_PLACES=393, PETRI_TRANSITIONS=452} [2022-07-19 21:01:35,196 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 323 predicate places. [2022-07-19 21:01:35,196 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 452 transitions, 8300 flow [2022-07-19 21:01:35,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 56.26829268292683) internal successors, (2307), 41 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:35,197 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:01:35,197 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:01:35,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-19 21:01:35,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 21:01:35,398 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:01:35,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:01:35,399 INFO L85 PathProgramCache]: Analyzing trace with hash 924194576, now seen corresponding path program 8 times [2022-07-19 21:01:35,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:01:35,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216110121] [2022-07-19 21:01:35,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:01:35,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:01:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:01:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:35,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:01:35,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216110121] [2022-07-19 21:01:35,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216110121] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:01:35,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360334596] [2022-07-19 21:01:35,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:01:35,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:01:35,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:01:35,595 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:01:35,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:01:35,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:01:35,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:01:35,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-19 21:01:35,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:01:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:35,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:01:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:36,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360334596] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:01:36,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:01:36,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 42 [2022-07-19 21:01:36,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188373212] [2022-07-19 21:01:36,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:01:36,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-19 21:01:36,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:01:36,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-19 21:01:36,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-07-19 21:01:36,261 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-19 21:01:36,263 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 452 transitions, 8300 flow. Second operand has 42 states, 42 states have (on average 56.285714285714285) internal successors, (2364), 42 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:36,263 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:01:36,263 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-19 21:01:36,263 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:01:38,294 INFO L129 PetriNetUnfolder]: 501/3574 cut-off events. [2022-07-19 21:01:38,294 INFO L130 PetriNetUnfolder]: For 434358/434942 co-relation queries the response was YES. [2022-07-19 21:01:38,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27343 conditions, 3574 events. 501/3574 cut-off events. For 434358/434942 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 31420 event pairs, 0 based on Foata normal form. 70/3266 useless extension candidates. Maximal degree in co-relation 27173. Up to 787 conditions per place. [2022-07-19 21:01:38,422 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 94 selfloop transitions, 466 changer transitions 29/634 dead transitions. [2022-07-19 21:01:38,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 634 transitions, 18690 flow [2022-07-19 21:01:38,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-19 21:01:38,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-19 21:01:38,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3520 transitions. [2022-07-19 21:01:38,429 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8243559718969555 [2022-07-19 21:01:38,429 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3520 transitions. [2022-07-19 21:01:38,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3520 transitions. [2022-07-19 21:01:38,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:01:38,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3520 transitions. [2022-07-19 21:01:38,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 57.704918032786885) internal successors, (3520), 61 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:38,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 70.0) internal successors, (4340), 62 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:38,442 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 70.0) internal successors, (4340), 62 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:38,443 INFO L186 Difference]: Start difference. First operand has 393 places, 452 transitions, 8300 flow. Second operand 61 states and 3520 transitions. [2022-07-19 21:01:38,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 634 transitions, 18690 flow [2022-07-19 21:01:39,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 634 transitions, 15904 flow, removed 1193 selfloop flow, removed 34 redundant places. [2022-07-19 21:01:39,259 INFO L242 Difference]: Finished difference. Result has 436 places, 553 transitions, 10379 flow [2022-07-19 21:01:39,260 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=6760, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=10379, PETRI_PLACES=436, PETRI_TRANSITIONS=553} [2022-07-19 21:01:39,261 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 366 predicate places. [2022-07-19 21:01:39,261 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 553 transitions, 10379 flow [2022-07-19 21:01:39,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 56.285714285714285) internal successors, (2364), 42 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:39,261 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:01:39,262 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:01:39,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 21:01:39,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 21:01:39,475 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:01:39,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:01:39,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1712720652, now seen corresponding path program 9 times [2022-07-19 21:01:39,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:01:39,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166015053] [2022-07-19 21:01:39,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:01:39,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:01:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:01:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:39,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:01:39,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166015053] [2022-07-19 21:01:39,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166015053] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:01:39,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354969824] [2022-07-19 21:01:39,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:01:39,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:01:39,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:01:39,680 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:01:39,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 21:01:39,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-19 21:01:39,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:01:39,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 21:01:39,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:01:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:39,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:01:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:40,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354969824] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:01:40,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:01:40,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2022-07-19 21:01:40,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788786808] [2022-07-19 21:01:40,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:01:40,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-19 21:01:40,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:01:40,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-19 21:01:40,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1555, Unknown=0, NotChecked=0, Total=1892 [2022-07-19 21:01:40,296 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-19 21:01:40,298 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 553 transitions, 10379 flow. Second operand has 44 states, 44 states have (on average 56.22727272727273) internal successors, (2474), 44 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:40,298 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:01:40,298 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-19 21:01:40,298 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:01:42,051 INFO L129 PetriNetUnfolder]: 509/3699 cut-off events. [2022-07-19 21:01:42,051 INFO L130 PetriNetUnfolder]: For 545909/546217 co-relation queries the response was YES. [2022-07-19 21:01:42,104 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29631 conditions, 3699 events. 509/3699 cut-off events. For 545909/546217 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 32739 event pairs, 0 based on Foata normal form. 75/3381 useless extension candidates. Maximal degree in co-relation 29443. Up to 803 conditions per place. [2022-07-19 21:01:42,137 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 110 selfloop transitions, 461 changer transitions 8/624 dead transitions. [2022-07-19 21:01:42,137 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 624 transitions, 16827 flow [2022-07-19 21:01:42,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 21:01:42,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-19 21:01:42,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2593 transitions. [2022-07-19 21:01:42,140 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8231746031746032 [2022-07-19 21:01:42,140 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2593 transitions. [2022-07-19 21:01:42,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2593 transitions. [2022-07-19 21:01:42,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:01:42,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2593 transitions. [2022-07-19 21:01:42,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.62222222222222) internal successors, (2593), 45 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:42,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 70.0) internal successors, (3220), 46 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) [2022-07-19 21:01:42,147 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 70.0) internal successors, (3220), 46 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) [2022-07-19 21:01:42,147 INFO L186 Difference]: Start difference. First operand has 436 places, 553 transitions, 10379 flow. Second operand 45 states and 2593 transitions. [2022-07-19 21:01:42,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 624 transitions, 16827 flow [2022-07-19 21:01:43,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 624 transitions, 14175 flow, removed 1115 selfloop flow, removed 35 redundant places. [2022-07-19 21:01:43,475 INFO L242 Difference]: Finished difference. Result has 443 places, 576 transitions, 10271 flow [2022-07-19 21:01:43,476 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=8641, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=10271, PETRI_PLACES=443, PETRI_TRANSITIONS=576} [2022-07-19 21:01:43,476 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 373 predicate places. [2022-07-19 21:01:43,476 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 576 transitions, 10271 flow [2022-07-19 21:01:43,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 56.22727272727273) internal successors, (2474), 44 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:43,477 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:01:43,477 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:01:43,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 21:01:43,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 21:01:43,678 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:01:43,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:01:43,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1258378046, now seen corresponding path program 10 times [2022-07-19 21:01:43,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:01:43,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134053281] [2022-07-19 21:01:43,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:01:43,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:01:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:01:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:43,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:01:43,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134053281] [2022-07-19 21:01:43,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134053281] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:01:43,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634058922] [2022-07-19 21:01:43,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:01:43,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:01:43,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:01:43,871 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:01:43,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 21:01:43,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:01:43,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:01:43,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 21:01:43,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:01:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:44,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:01:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:01:44,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634058922] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:01:44,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:01:44,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 43 [2022-07-19 21:01:44,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601320848] [2022-07-19 21:01:44,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:01:44,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-19 21:01:44,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:01:44,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-19 21:01:44,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 21:01:44,381 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-19 21:01:44,383 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 576 transitions, 10271 flow. Second operand has 43 states, 43 states have (on average 56.23255813953488) internal successors, (2418), 43 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:44,383 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:01:44,383 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-19 21:01:44,383 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:01:46,122 INFO L129 PetriNetUnfolder]: 530/3807 cut-off events. [2022-07-19 21:01:46,123 INFO L130 PetriNetUnfolder]: For 498454/498873 co-relation queries the response was YES. [2022-07-19 21:01:46,166 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29294 conditions, 3807 events. 530/3807 cut-off events. For 498454/498873 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 33932 event pairs, 1 based on Foata normal form. 85/3488 useless extension candidates. Maximal degree in co-relation 29107. Up to 819 conditions per place. [2022-07-19 21:01:46,198 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 108 selfloop transitions, 479 changer transitions 8/640 dead transitions. [2022-07-19 21:01:46,198 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 640 transitions, 16340 flow [2022-07-19 21:01:46,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-19 21:01:46,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-07-19 21:01:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2539 transitions. [2022-07-19 21:01:46,201 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8243506493506494 [2022-07-19 21:01:46,201 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2539 transitions. [2022-07-19 21:01:46,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2539 transitions. [2022-07-19 21:01:46,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:01:46,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2539 transitions. [2022-07-19 21:01:46,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 57.70454545454545) internal successors, (2539), 44 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:46,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 70.0) internal successors, (3150), 45 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:46,208 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 70.0) internal successors, (3150), 45 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:46,209 INFO L186 Difference]: Start difference. First operand has 443 places, 576 transitions, 10271 flow. Second operand 44 states and 2539 transitions. [2022-07-19 21:01:46,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 640 transitions, 16340 flow [2022-07-19 21:01:47,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 640 transitions, 14914 flow, removed 549 selfloop flow, removed 27 redundant places. [2022-07-19 21:01:47,128 INFO L242 Difference]: Finished difference. Result has 463 places, 588 transitions, 11189 flow [2022-07-19 21:01:47,129 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=9551, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=467, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=11189, PETRI_PLACES=463, PETRI_TRANSITIONS=588} [2022-07-19 21:01:47,129 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 393 predicate places. [2022-07-19 21:01:47,129 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 588 transitions, 11189 flow [2022-07-19 21:01:47,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 56.23255813953488) internal successors, (2418), 43 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:47,130 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:01:47,130 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:01:47,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 21:01:47,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 21:01:47,343 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:01:47,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:01:47,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1949057506, now seen corresponding path program 11 times [2022-07-19 21:01:47,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:01:47,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517969311] [2022-07-19 21:01:47,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:01:47,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:01:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:01:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 353 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:01:47,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:01:47,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517969311] [2022-07-19 21:01:47,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517969311] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:01:47,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288010692] [2022-07-19 21:01:47,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:01:47,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:01:47,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:01:47,539 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:01:47,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 21:01:47,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-19 21:01:47,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:01:47,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 21:01:47,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:01:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 353 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:01:47,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:01:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 353 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:01:48,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288010692] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:01:48,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:01:48,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 43 [2022-07-19 21:01:48,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956089318] [2022-07-19 21:01:48,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:01:48,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-19 21:01:48,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:01:48,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-19 21:01:48,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1413, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 21:01:48,083 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-19 21:01:48,084 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 588 transitions, 11189 flow. Second operand has 43 states, 43 states have (on average 56.23255813953488) internal successors, (2418), 43 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:48,084 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:01:48,084 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-19 21:01:48,085 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:01:49,988 INFO L129 PetriNetUnfolder]: 546/3921 cut-off events. [2022-07-19 21:01:49,989 INFO L130 PetriNetUnfolder]: For 444890/445319 co-relation queries the response was YES. [2022-07-19 21:01:50,037 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28812 conditions, 3921 events. 546/3921 cut-off events. For 444890/445319 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 35232 event pairs, 0 based on Foata normal form. 104/3611 useless extension candidates. Maximal degree in co-relation 28623. Up to 835 conditions per place. [2022-07-19 21:01:50,064 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 105 selfloop transitions, 503 changer transitions 17/670 dead transitions. [2022-07-19 21:01:50,064 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 670 transitions, 17948 flow [2022-07-19 21:01:50,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-19 21:01:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-07-19 21:01:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2884 transitions. [2022-07-19 21:01:50,067 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.824 [2022-07-19 21:01:50,067 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2884 transitions. [2022-07-19 21:01:50,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2884 transitions. [2022-07-19 21:01:50,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:01:50,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2884 transitions. [2022-07-19 21:01:50,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 57.68) internal successors, (2884), 50 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:50,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:50,073 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:50,073 INFO L186 Difference]: Start difference. First operand has 463 places, 588 transitions, 11189 flow. Second operand 50 states and 2884 transitions. [2022-07-19 21:01:50,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 670 transitions, 17948 flow [2022-07-19 21:01:51,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 670 transitions, 16532 flow, removed 309 selfloop flow, removed 39 redundant places. [2022-07-19 21:01:51,080 INFO L242 Difference]: Finished difference. Result has 480 places, 611 transitions, 12042 flow [2022-07-19 21:01:51,081 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=10075, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=483, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=12042, PETRI_PLACES=480, PETRI_TRANSITIONS=611} [2022-07-19 21:01:51,081 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 410 predicate places. [2022-07-19 21:01:51,081 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 611 transitions, 12042 flow [2022-07-19 21:01:51,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 56.23255813953488) internal successors, (2418), 43 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:51,081 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:01:51,082 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:01:51,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-19 21:01:51,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 21:01:51,282 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:01:51,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:01:51,283 INFO L85 PathProgramCache]: Analyzing trace with hash 495016770, now seen corresponding path program 12 times [2022-07-19 21:01:51,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:01:51,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98037192] [2022-07-19 21:01:51,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:01:51,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:01:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:01:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:01:51,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:01:51,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98037192] [2022-07-19 21:01:51,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98037192] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:01:51,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531484608] [2022-07-19 21:01:51,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:01:51,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:01:51,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:01:51,503 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:01:51,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 21:01:51,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-07-19 21:01:51,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:01:51,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-19 21:01:51,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:01:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:01:51,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:01:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:01:52,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531484608] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:01:52,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:01:52,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 46 [2022-07-19 21:01:52,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381704336] [2022-07-19 21:01:52,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:01:52,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-19 21:01:52,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:01:52,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-19 21:01:52,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1628, Unknown=0, NotChecked=0, Total=2070 [2022-07-19 21:01:52,113 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-19 21:01:52,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 611 transitions, 12042 flow. Second operand has 46 states, 46 states have (on average 56.19565217391305) internal successors, (2585), 46 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:52,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:01:52,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-19 21:01:52,115 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:01:54,100 INFO L129 PetriNetUnfolder]: 554/3961 cut-off events. [2022-07-19 21:01:54,100 INFO L130 PetriNetUnfolder]: For 514485/514990 co-relation queries the response was YES. [2022-07-19 21:01:54,146 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30812 conditions, 3961 events. 554/3961 cut-off events. For 514485/514990 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 35604 event pairs, 0 based on Foata normal form. 113/3656 useless extension candidates. Maximal degree in co-relation 30617. Up to 837 conditions per place. [2022-07-19 21:01:54,176 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 102 selfloop transitions, 528 changer transitions 14/689 dead transitions. [2022-07-19 21:01:54,177 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 689 transitions, 19633 flow [2022-07-19 21:01:54,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-19 21:01:54,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-07-19 21:01:54,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3057 transitions. [2022-07-19 21:01:54,181 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.823989218328841 [2022-07-19 21:01:54,181 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3057 transitions. [2022-07-19 21:01:54,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3057 transitions. [2022-07-19 21:01:54,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:01:54,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3057 transitions. [2022-07-19 21:01:54,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 57.679245283018865) internal successors, (3057), 53 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:54,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 70.0) internal successors, (3780), 54 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:54,187 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 70.0) internal successors, (3780), 54 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:54,188 INFO L186 Difference]: Start difference. First operand has 480 places, 611 transitions, 12042 flow. Second operand 53 states and 3057 transitions. [2022-07-19 21:01:54,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 689 transitions, 19633 flow [2022-07-19 21:01:55,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 689 transitions, 17802 flow, removed 495 selfloop flow, removed 43 redundant places. [2022-07-19 21:01:55,138 INFO L242 Difference]: Finished difference. Result has 496 places, 621 transitions, 12553 flow [2022-07-19 21:01:55,139 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=10563, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=519, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=12553, PETRI_PLACES=496, PETRI_TRANSITIONS=621} [2022-07-19 21:01:55,140 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 426 predicate places. [2022-07-19 21:01:55,140 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 621 transitions, 12553 flow [2022-07-19 21:01:55,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 56.19565217391305) internal successors, (2585), 46 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:01:55,140 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:01:55,140 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:01:55,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 21:01:55,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:01:55,346 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:01:55,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:01:55,346 INFO L85 PathProgramCache]: Analyzing trace with hash 2076499680, now seen corresponding path program 13 times [2022-07-19 21:01:55,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:01:55,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077556963] [2022-07-19 21:01:55,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:01:55,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:01:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:01:55,377 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:01:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:01:55,424 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:01:55,425 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:01:55,426 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-07-19 21:01:55,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-07-19 21:01:55,427 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-07-19 21:01:55,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 21:01:55,428 INFO L356 BasicCegarLoop]: Path program histogram: [13, 2, 2, 1, 1, 1] [2022-07-19 21:01:55,432 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-19 21:01:55,432 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 21:01:55,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:01:55 BasicIcfg [2022-07-19 21:01:55,521 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 21:01:55,521 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 21:01:55,521 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 21:01:55,521 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 21:01:55,522 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:01:18" (3/4) ... [2022-07-19 21:01:55,523 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-19 21:01:55,591 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 21:01:55,591 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 21:01:55,594 INFO L158 Benchmark]: Toolchain (without parser) took 37627.38ms. Allocated memory was 134.2MB in the beginning and 2.6GB in the end (delta: 2.4GB). Free memory was 105.1MB in the beginning and 1.7GB in the end (delta: -1.6GB). Peak memory consumption was 885.3MB. Max. memory is 16.1GB. [2022-07-19 21:01:55,595 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 88.1MB. Free memory was 45.5MB in the beginning and 45.4MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 21:01:55,595 INFO L158 Benchmark]: CACSL2BoogieTranslator took 376.00ms. Allocated memory is still 134.2MB. Free memory was 104.8MB in the beginning and 101.3MB in the end (delta: 3.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 21:01:55,595 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.36ms. Allocated memory is still 134.2MB. Free memory was 101.3MB in the beginning and 99.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 21:01:55,596 INFO L158 Benchmark]: Boogie Preprocessor took 38.77ms. Allocated memory is still 134.2MB. Free memory was 99.6MB in the beginning and 98.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 21:01:55,597 INFO L158 Benchmark]: RCFGBuilder took 336.00ms. Allocated memory is still 134.2MB. Free memory was 98.0MB in the beginning and 86.6MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-19 21:01:55,598 INFO L158 Benchmark]: TraceAbstraction took 36766.49ms. Allocated memory was 134.2MB in the beginning and 2.6GB in the end (delta: 2.4GB). Free memory was 85.8MB in the beginning and 1.7GB in the end (delta: -1.6GB). Peak memory consumption was 845.8MB. Max. memory is 16.1GB. [2022-07-19 21:01:55,598 INFO L158 Benchmark]: Witness Printer took 72.80ms. Allocated memory is still 2.6GB. Free memory was 1.7GB in the beginning and 1.7GB in the end (delta: 22.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-07-19 21:01:55,599 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 88.1MB. Free memory was 45.5MB in the beginning and 45.4MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 376.00ms. Allocated memory is still 134.2MB. Free memory was 104.8MB in the beginning and 101.3MB in the end (delta: 3.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.36ms. Allocated memory is still 134.2MB. Free memory was 101.3MB in the beginning and 99.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 38.77ms. Allocated memory is still 134.2MB. Free memory was 99.6MB in the beginning and 98.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 336.00ms. Allocated memory is still 134.2MB. Free memory was 98.0MB in the beginning and 86.6MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 36766.49ms. Allocated memory was 134.2MB in the beginning and 2.6GB in the end (delta: 2.4GB). Free memory was 85.8MB in the beginning and 1.7GB in the end (delta: -1.6GB). Peak memory consumption was 845.8MB. Max. memory is 16.1GB. * Witness Printer took 72.80ms. Allocated memory is still 2.6GB. Free memory was 1.7GB in the beginning and 1.7GB in the end (delta: 22.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; VAL [i=3, j=6] [L712] 0 pthread_t id1, id2; VAL [\old(argc)=49, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6] [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [\old(argc)=49, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6, pthread_create(&id1, ((void *)0), t1, ((void *)0))=6] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6, k=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=7] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=0] [L716] 0 int condI = i >= (2*10 +6); VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, i=7, id1={5:0}, id2={3:0}, j=8, k=0, k=0] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=0] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=1] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=3] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=3, k=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=4, k=5] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=4, k=6] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=5] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=5] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=6] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=7] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=6, k=7] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=6] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=6, k=8] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=7] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=8] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=7, k=8] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=7, k=9] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=7] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=8] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=9] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=8, k=9] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L719] 0 int condJ = j >= (2*10 +6); VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=25, id1={5:0}, id2={3:0}, j=26, k=9, k=9] [L721] COND TRUE 0 condI || condJ VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=25, id1={5:0}, id2={3:0}, j=26, k=9, k=9] [L722] 0 reach_error() VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=25, id1={5:0}, id2={3:0}, j=26, k=9, k=9] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 36.6s, OverallIterations: 20, TraceHistogramMax: 10, PathProgramHistogramMax: 13, EmptinessCheckTime: 0.0s, AutomataDifference: 23.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1327 SdHoareTripleChecker+Valid, 2.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1327 mSDsluCounter, 354 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 519 mSDsCounter, 2112 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3314 IncrementalHoareTripleChecker+Invalid, 5426 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2112 mSolverCounterUnsat, 87 mSDtfsCounter, 3314 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3390 GetRequests, 2448 SyntacticMatches, 1 SemanticMatches, 941 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19952 ImplicationChecksByTransitivity, 9.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12553occurred in iteration=19, InterpolantAutomatonStates: 623, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 8.6s InterpolantComputationTime, 3009 NumberOfCodeBlocks, 3004 NumberOfCodeBlocksAsserted, 87 NumberOfCheckSat, 4150 ConstructedInterpolants, 0 QuantifiedInterpolants, 16231 SizeOfPredicates, 181 NumberOfNonLiveVariables, 2872 ConjunctsInSsa, 246 ConjunctsInUnsatCore, 45 InterpolantComputations, 6 PerfectInterpolantSequences, 138/8442 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-19 21:01:55,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE