./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/triangular-longer-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/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 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 16:22:34,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 16:22:34,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 16:22:34,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 16:22:34,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 16:22:34,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 16:22:34,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 16:22:34,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 16:22:34,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 16:22:34,210 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 16:22:34,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 16:22:34,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 16:22:34,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 16:22:34,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 16:22:34,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 16:22:34,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 16:22:34,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 16:22:34,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 16:22:34,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 16:22:34,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 16:22:34,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 16:22:34,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 16:22:34,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 16:22:34,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 16:22:34,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 16:22:34,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 16:22:34,235 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 16:22:34,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 16:22:34,237 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 16:22:34,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 16:22:34,238 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 16:22:34,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 16:22:34,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 16:22:34,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 16:22:34,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 16:22:34,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 16:22:34,247 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 16:22:34,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 16:22:34,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 16:22:34,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 16:22:34,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 16:22:34,249 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 16:22:34,286 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 16:22:34,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 16:22:34,288 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 16:22:34,288 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 16:22:34,288 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 16:22:34,288 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 16:22:34,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 16:22:34,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 16:22:34,289 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 16:22:34,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 16:22:34,290 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 16:22:34,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 16:22:34,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 16:22:34,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 16:22:34,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 16:22:34,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 16:22:34,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 16:22:34,291 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 16:22:34,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 16:22:34,291 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 16:22:34,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 16:22:34,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 16:22:34,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 16:22:34,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 16:22:34,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:22:34,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 16:22:34,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 16:22:34,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 16:22:34,292 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 16:22:34,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 16:22:34,293 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 16:22:34,293 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 16:22:34,293 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 16:22:34,293 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 16:22:34,293 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 16:22:34,294 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 647bb9f2bc4e44b8324ce986a0773d034e56e6ec110a9fd5233f5c8c0dbbeb10 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 16:22:34,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 16:22:34,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 16:22:34,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 16:22:34,502 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 16:22:34,502 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 16:22:34,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2023-08-30 16:22:35,440 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 16:22:35,635 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 16:22:35,639 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2023-08-30 16:22:35,648 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8fb6db3b/899ee9e1e78b474a83da8c4d6f2fb684/FLAGd9354cb3f [2023-08-30 16:22:35,660 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8fb6db3b/899ee9e1e78b474a83da8c4d6f2fb684 [2023-08-30 16:22:35,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 16:22:35,662 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 16:22:35,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 16:22:35,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 16:22:35,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 16:22:35,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:22:35" (1/1) ... [2023-08-30 16:22:35,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64fb479e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:35, skipping insertion in model container [2023-08-30 16:22:35,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:22:35" (1/1) ... [2023-08-30 16:22:35,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 16:22:35,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 16:22:35,957 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i[30963,30976] [2023-08-30 16:22:35,959 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:22:35,966 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 16:22:36,002 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i[30963,30976] [2023-08-30 16:22:36,004 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:22:36,030 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 16:22:36,030 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 16:22:36,044 INFO L208 MainTranslator]: Completed translation [2023-08-30 16:22:36,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:36 WrapperNode [2023-08-30 16:22:36,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 16:22:36,045 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 16:22:36,045 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 16:22:36,045 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 16:22:36,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:36" (1/1) ... [2023-08-30 16:22:36,072 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:36" (1/1) ... [2023-08-30 16:22:36,086 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2023-08-30 16:22:36,087 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 16:22:36,087 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 16:22:36,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 16:22:36,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 16:22:36,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:36" (1/1) ... [2023-08-30 16:22:36,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:36" (1/1) ... [2023-08-30 16:22:36,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:36" (1/1) ... [2023-08-30 16:22:36,098 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:36" (1/1) ... [2023-08-30 16:22:36,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:36" (1/1) ... [2023-08-30 16:22:36,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:36" (1/1) ... [2023-08-30 16:22:36,114 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:36" (1/1) ... [2023-08-30 16:22:36,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:36" (1/1) ... [2023-08-30 16:22:36,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 16:22:36,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 16:22:36,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 16:22:36,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 16:22:36,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:36" (1/1) ... [2023-08-30 16:22:36,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:22:36,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:22:36,141 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 16:22:36,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 16:22:36,173 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 16:22:36,173 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 16:22:36,173 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 16:22:36,173 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 16:22:36,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 16:22:36,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 16:22:36,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 16:22:36,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 16:22:36,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 16:22:36,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 16:22:36,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 16:22:36,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 16:22:36,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 16:22:36,175 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 16:22:36,300 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 16:22:36,302 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 16:22:36,440 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 16:22:36,444 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 16:22:36,444 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 16:22:36,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:22:36 BoogieIcfgContainer [2023-08-30 16:22:36,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 16:22:36,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 16:22:36,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 16:22:36,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 16:22:36,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:22:35" (1/3) ... [2023-08-30 16:22:36,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359b6d38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:22:36, skipping insertion in model container [2023-08-30 16:22:36,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:36" (2/3) ... [2023-08-30 16:22:36,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359b6d38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:22:36, skipping insertion in model container [2023-08-30 16:22:36,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:22:36" (3/3) ... [2023-08-30 16:22:36,450 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2023-08-30 16:22:36,455 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 16:22:36,461 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 16:22:36,461 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 16:22:36,461 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 16:22:36,526 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:22:36,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2023-08-30 16:22:36,595 INFO L130 PetriNetUnfolder]: 5/64 cut-off events. [2023-08-30 16:22:36,596 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:22:36,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-08-30 16:22:36,605 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 142 flow [2023-08-30 16:22:36,609 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 64 transitions, 134 flow [2023-08-30 16:22:36,612 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:22:36,620 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 66 places, 64 transitions, 134 flow [2023-08-30 16:22:36,622 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 66 places, 64 transitions, 134 flow [2023-08-30 16:22:36,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 64 transitions, 134 flow [2023-08-30 16:22:36,644 INFO L130 PetriNetUnfolder]: 5/64 cut-off events. [2023-08-30 16:22:36,644 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:22:36,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-08-30 16:22:36,646 INFO L119 LiptonReduction]: Number of co-enabled transitions 1078 [2023-08-30 16:22:38,076 INFO L134 LiptonReduction]: Checked pairs total: 999 [2023-08-30 16:22:38,076 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-08-30 16:22:38,088 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:22:38,093 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@8ecc3c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:22:38,093 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 16:22:38,099 INFO L130 PetriNetUnfolder]: 3/13 cut-off events. [2023-08-30 16:22:38,099 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:22:38,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:22:38,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 16:22:38,100 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:22:38,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:22:38,104 INFO L85 PathProgramCache]: Analyzing trace with hash -776471266, now seen corresponding path program 1 times [2023-08-30 16:22:38,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:22:38,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098079200] [2023-08-30 16:22:38,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:22:38,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:22:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:22:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:38,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:22:38,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098079200] [2023-08-30 16:22:38,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098079200] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:22:38,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:22:38,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:22:38,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621977130] [2023-08-30 16:22:38,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:22:38,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:22:38,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:22:38,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:22:38,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:22:38,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 124 [2023-08-30 16:22:38,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:38,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:22:38,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 124 [2023-08-30 16:22:38,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:22:38,443 INFO L130 PetriNetUnfolder]: 94/152 cut-off events. [2023-08-30 16:22:38,443 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 16:22:38,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 152 events. 94/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 393 event pairs, 11 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 306. Up to 76 conditions per place. [2023-08-30 16:22:38,445 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 18 selfloop transitions, 4 changer transitions 4/26 dead transitions. [2023-08-30 16:22:38,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 26 transitions, 110 flow [2023-08-30 16:22:38,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 16:22:38,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 16:22:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 245 transitions. [2023-08-30 16:22:38,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4939516129032258 [2023-08-30 16:22:38,453 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 245 transitions. [2023-08-30 16:22:38,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 245 transitions. [2023-08-30 16:22:38,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:22:38,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 245 transitions. [2023-08-30 16:22:38,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:38,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:38,461 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:38,462 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 4 states and 245 transitions. [2023-08-30 16:22:38,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 26 transitions, 110 flow [2023-08-30 16:22:38,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:22:38,464 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 53 flow [2023-08-30 16:22:38,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2023-08-30 16:22:38,467 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2023-08-30 16:22:38,468 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 53 flow [2023-08-30 16:22:38,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:38,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:22:38,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:22:38,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 16:22:38,469 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:22:38,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:22:38,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1135033148, now seen corresponding path program 1 times [2023-08-30 16:22:38,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:22:38,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686584711] [2023-08-30 16:22:38,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:22:38,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:22:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:22:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:38,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:22:38,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686584711] [2023-08-30 16:22:38,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686584711] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:22:38,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:22:38,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:22:38,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418280441] [2023-08-30 16:22:38,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:22:38,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:22:38,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:22:38,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:22:38,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:22:38,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 16:22:38,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 53 flow. Second operand has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:38,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:22:38,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 16:22:38,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:22:38,641 INFO L130 PetriNetUnfolder]: 126/217 cut-off events. [2023-08-30 16:22:38,641 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2023-08-30 16:22:38,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 217 events. 126/217 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 654 event pairs, 19 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 535. Up to 89 conditions per place. [2023-08-30 16:22:38,643 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2023-08-30 16:22:38,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 215 flow [2023-08-30 16:22:38,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:22:38,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:22:38,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 356 transitions. [2023-08-30 16:22:38,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478494623655914 [2023-08-30 16:22:38,645 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 356 transitions. [2023-08-30 16:22:38,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 356 transitions. [2023-08-30 16:22:38,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:22:38,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 356 transitions. [2023-08-30 16:22:38,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 59.333333333333336) internal successors, (356), 6 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:38,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:38,650 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:38,651 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 53 flow. Second operand 6 states and 356 transitions. [2023-08-30 16:22:38,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 215 flow [2023-08-30 16:22:38,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 42 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:22:38,652 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 134 flow [2023-08-30 16:22:38,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-08-30 16:22:38,653 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 11 predicate places. [2023-08-30 16:22:38,654 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 134 flow [2023-08-30 16:22:38,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:38,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:22:38,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:22:38,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 16:22:38,655 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:22:38,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:22:38,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1135047098, now seen corresponding path program 2 times [2023-08-30 16:22:38,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:22:38,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633064765] [2023-08-30 16:22:38,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:22:38,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:22:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:22:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:38,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:22:38,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633064765] [2023-08-30 16:22:38,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633064765] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:22:38,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:22:38,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:22:38,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445904450] [2023-08-30 16:22:38,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:22:38,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:22:38,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:22:38,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:22:38,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:22:38,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 16:22:38,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:38,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:22:38,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 16:22:38,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:22:38,804 INFO L130 PetriNetUnfolder]: 114/199 cut-off events. [2023-08-30 16:22:38,804 INFO L131 PetriNetUnfolder]: For 280/280 co-relation queries the response was YES. [2023-08-30 16:22:38,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 199 events. 114/199 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 630 event pairs, 19 based on Foata normal form. 10/209 useless extension candidates. Maximal degree in co-relation 636. Up to 84 conditions per place. [2023-08-30 16:22:38,806 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 29 selfloop transitions, 9 changer transitions 4/42 dead transitions. [2023-08-30 16:22:38,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 284 flow [2023-08-30 16:22:38,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 16:22:38,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 16:22:38,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 298 transitions. [2023-08-30 16:22:38,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806451612903226 [2023-08-30 16:22:38,809 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 298 transitions. [2023-08-30 16:22:38,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 298 transitions. [2023-08-30 16:22:38,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:22:38,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 298 transitions. [2023-08-30 16:22:38,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 59.6) internal successors, (298), 5 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:38,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:38,811 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:38,812 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 134 flow. Second operand 5 states and 298 transitions. [2023-08-30 16:22:38,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 284 flow [2023-08-30 16:22:38,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 282 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 16:22:38,814 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 182 flow [2023-08-30 16:22:38,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-08-30 16:22:38,815 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 17 predicate places. [2023-08-30 16:22:38,815 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 182 flow [2023-08-30 16:22:38,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:38,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:22:38,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:22:38,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 16:22:38,816 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:22:38,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:22:38,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1601852847, now seen corresponding path program 1 times [2023-08-30 16:22:38,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:22:38,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457898744] [2023-08-30 16:22:38,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:22:38,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:22:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:22:38,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:38,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:22:38,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457898744] [2023-08-30 16:22:38,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457898744] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:22:38,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:22:38,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:22:38,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063211019] [2023-08-30 16:22:38,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:22:38,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 16:22:38,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:22:38,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 16:22:38,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 16:22:38,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 16:22:38,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:38,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:22:38,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 16:22:38,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:22:38,961 INFO L130 PetriNetUnfolder]: 136/239 cut-off events. [2023-08-30 16:22:38,961 INFO L131 PetriNetUnfolder]: For 571/571 co-relation queries the response was YES. [2023-08-30 16:22:38,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 239 events. 136/239 cut-off events. For 571/571 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 797 event pairs, 31 based on Foata normal form. 4/243 useless extension candidates. Maximal degree in co-relation 842. Up to 101 conditions per place. [2023-08-30 16:22:38,963 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 30 selfloop transitions, 16 changer transitions 8/54 dead transitions. [2023-08-30 16:22:38,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 54 transitions, 419 flow [2023-08-30 16:22:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 16:22:38,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 16:22:38,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 412 transitions. [2023-08-30 16:22:38,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47465437788018433 [2023-08-30 16:22:38,974 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 412 transitions. [2023-08-30 16:22:38,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 412 transitions. [2023-08-30 16:22:38,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:22:38,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 412 transitions. [2023-08-30 16:22:38,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.857142857142854) internal successors, (412), 7 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:38,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:38,977 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:38,977 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 182 flow. Second operand 7 states and 412 transitions. [2023-08-30 16:22:38,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 54 transitions, 419 flow [2023-08-30 16:22:38,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 54 transitions, 379 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-30 16:22:38,980 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 269 flow [2023-08-30 16:22:38,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=269, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-08-30 16:22:38,980 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 22 predicate places. [2023-08-30 16:22:38,980 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 269 flow [2023-08-30 16:22:38,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:38,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:22:38,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:22:38,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 16:22:38,981 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:22:38,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:22:38,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1601722647, now seen corresponding path program 2 times [2023-08-30 16:22:38,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:22:38,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513539837] [2023-08-30 16:22:38,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:22:38,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:22:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:22:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:39,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:22:39,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513539837] [2023-08-30 16:22:39,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513539837] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:22:39,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:22:39,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:22:39,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275637057] [2023-08-30 16:22:39,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:22:39,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 16:22:39,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:22:39,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 16:22:39,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 16:22:39,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 16:22:39,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 269 flow. Second operand has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:39,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:22:39,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 16:22:39,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:22:39,177 INFO L130 PetriNetUnfolder]: 172/303 cut-off events. [2023-08-30 16:22:39,178 INFO L131 PetriNetUnfolder]: For 787/787 co-relation queries the response was YES. [2023-08-30 16:22:39,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1151 conditions, 303 events. 172/303 cut-off events. For 787/787 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1053 event pairs, 22 based on Foata normal form. 8/311 useless extension candidates. Maximal degree in co-relation 1127. Up to 79 conditions per place. [2023-08-30 16:22:39,179 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 38 selfloop transitions, 22 changer transitions 3/63 dead transitions. [2023-08-30 16:22:39,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 519 flow [2023-08-30 16:22:39,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:22:39,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:22:39,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 470 transitions. [2023-08-30 16:22:39,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4737903225806452 [2023-08-30 16:22:39,182 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 470 transitions. [2023-08-30 16:22:39,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 470 transitions. [2023-08-30 16:22:39,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:22:39,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 470 transitions. [2023-08-30 16:22:39,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.75) internal successors, (470), 8 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:39,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:39,184 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:39,184 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 269 flow. Second operand 8 states and 470 transitions. [2023-08-30 16:22:39,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 519 flow [2023-08-30 16:22:39,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 495 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-30 16:22:39,187 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 375 flow [2023-08-30 16:22:39,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=375, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2023-08-30 16:22:39,188 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 32 predicate places. [2023-08-30 16:22:39,188 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 375 flow [2023-08-30 16:22:39,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:39,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:22:39,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:22:39,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 16:22:39,189 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:22:39,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:22:39,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1572215607, now seen corresponding path program 3 times [2023-08-30 16:22:39,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:22:39,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382128259] [2023-08-30 16:22:39,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:22:39,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:22:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:22:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:39,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:22:39,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382128259] [2023-08-30 16:22:39,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382128259] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:22:39,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:22:39,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:22:39,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574720365] [2023-08-30 16:22:39,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:22:39,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 16:22:39,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:22:39,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 16:22:39,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-30 16:22:39,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 16:22:39,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 375 flow. Second operand has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:39,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:22:39,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 16:22:39,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:22:39,370 INFO L130 PetriNetUnfolder]: 168/295 cut-off events. [2023-08-30 16:22:39,370 INFO L131 PetriNetUnfolder]: For 1394/1394 co-relation queries the response was YES. [2023-08-30 16:22:39,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1328 conditions, 295 events. 168/295 cut-off events. For 1394/1394 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1049 event pairs, 18 based on Foata normal form. 8/303 useless extension candidates. Maximal degree in co-relation 1299. Up to 71 conditions per place. [2023-08-30 16:22:39,372 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 28 selfloop transitions, 27 changer transitions 10/65 dead transitions. [2023-08-30 16:22:39,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 651 flow [2023-08-30 16:22:39,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 16:22:39,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 16:22:39,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 469 transitions. [2023-08-30 16:22:39,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727822580645161 [2023-08-30 16:22:39,374 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 469 transitions. [2023-08-30 16:22:39,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 469 transitions. [2023-08-30 16:22:39,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:22:39,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 469 transitions. [2023-08-30 16:22:39,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.625) internal successors, (469), 8 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:39,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:39,377 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:39,377 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 375 flow. Second operand 8 states and 469 transitions. [2023-08-30 16:22:39,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 651 flow [2023-08-30 16:22:39,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 617 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-30 16:22:39,381 INFO L231 Difference]: Finished difference. Result has 57 places, 43 transitions, 476 flow [2023-08-30 16:22:39,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=476, PETRI_PLACES=57, PETRI_TRANSITIONS=43} [2023-08-30 16:22:39,383 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 39 predicate places. [2023-08-30 16:22:39,383 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 43 transitions, 476 flow [2023-08-30 16:22:39,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:39,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:22:39,387 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:22:39,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 16:22:39,387 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:22:39,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:22:39,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1868187119, now seen corresponding path program 4 times [2023-08-30 16:22:39,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:22:39,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829837394] [2023-08-30 16:22:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:22:39,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:22:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:22:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:39,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:22:39,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829837394] [2023-08-30 16:22:39,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829837394] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:22:39,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124965268] [2023-08-30 16:22:39,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 16:22:39,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:22:39,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:22:39,490 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:22:39,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 16:22:39,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 16:22:39,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:22:39,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 16:22:39,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:22:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:39,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:22:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:39,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124965268] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:22:39,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:22:39,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 16:22:39,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622381122] [2023-08-30 16:22:39,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:22:39,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 16:22:39,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:22:39,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 16:22:39,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-30 16:22:39,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 16:22:39,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 43 transitions, 476 flow. Second operand has 12 states, 12 states have (on average 54.833333333333336) internal successors, (658), 12 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:39,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:22:39,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 16:22:39,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:22:39,880 INFO L130 PetriNetUnfolder]: 192/343 cut-off events. [2023-08-30 16:22:39,881 INFO L131 PetriNetUnfolder]: For 2705/2705 co-relation queries the response was YES. [2023-08-30 16:22:39,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1694 conditions, 343 events. 192/343 cut-off events. For 2705/2705 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1207 event pairs, 39 based on Foata normal form. 24/367 useless extension candidates. Maximal degree in co-relation 1662. Up to 181 conditions per place. [2023-08-30 16:22:39,883 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 45 selfloop transitions, 19 changer transitions 19/83 dead transitions. [2023-08-30 16:22:39,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 83 transitions, 916 flow [2023-08-30 16:22:39,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 16:22:39,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 16:22:39,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 701 transitions. [2023-08-30 16:22:39,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47110215053763443 [2023-08-30 16:22:39,885 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 701 transitions. [2023-08-30 16:22:39,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 701 transitions. [2023-08-30 16:22:39,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:22:39,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 701 transitions. [2023-08-30 16:22:39,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.416666666666664) internal successors, (701), 12 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:39,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 124.0) internal successors, (1612), 13 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:39,889 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 124.0) internal successors, (1612), 13 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:39,889 INFO L175 Difference]: Start difference. First operand has 57 places, 43 transitions, 476 flow. Second operand 12 states and 701 transitions. [2023-08-30 16:22:39,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 83 transitions, 916 flow [2023-08-30 16:22:39,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 83 transitions, 861 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-08-30 16:22:39,894 INFO L231 Difference]: Finished difference. Result has 69 places, 49 transitions, 586 flow [2023-08-30 16:22:39,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=586, PETRI_PLACES=69, PETRI_TRANSITIONS=49} [2023-08-30 16:22:39,895 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 51 predicate places. [2023-08-30 16:22:39,895 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 49 transitions, 586 flow [2023-08-30 16:22:39,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.833333333333336) internal successors, (658), 12 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:39,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:22:39,896 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:22:39,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 16:22:40,102 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 [2023-08-30 16:22:40,102 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:22:40,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:22:40,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1881593069, now seen corresponding path program 5 times [2023-08-30 16:22:40,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:22:40,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214044382] [2023-08-30 16:22:40,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:22:40,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:22:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:22:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:40,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:22:40,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214044382] [2023-08-30 16:22:40,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214044382] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:22:40,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424849465] [2023-08-30 16:22:40,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 16:22:40,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:22:40,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:22:40,169 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:22:40,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 16:22:40,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:22:40,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:22:40,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 16:22:40,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:22:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:40,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:22:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:40,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424849465] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:22:40,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:22:40,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 16:22:40,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822025413] [2023-08-30 16:22:40,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:22:40,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 16:22:40,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:22:40,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 16:22:40,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-08-30 16:22:40,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 16:22:40,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 49 transitions, 586 flow. Second operand has 13 states, 13 states have (on average 54.92307692307692) internal successors, (714), 13 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:40,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:22:40,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 16:22:40,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:22:40,701 INFO L130 PetriNetUnfolder]: 254/459 cut-off events. [2023-08-30 16:22:40,702 INFO L131 PetriNetUnfolder]: For 6988/6988 co-relation queries the response was YES. [2023-08-30 16:22:40,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2615 conditions, 459 events. 254/459 cut-off events. For 6988/6988 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1795 event pairs, 28 based on Foata normal form. 28/487 useless extension candidates. Maximal degree in co-relation 2577. Up to 131 conditions per place. [2023-08-30 16:22:40,704 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 46 selfloop transitions, 44 changer transitions 29/119 dead transitions. [2023-08-30 16:22:40,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 119 transitions, 1453 flow [2023-08-30 16:22:40,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 16:22:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 16:22:40,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1051 transitions. [2023-08-30 16:22:40,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47087813620071683 [2023-08-30 16:22:40,707 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1051 transitions. [2023-08-30 16:22:40,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1051 transitions. [2023-08-30 16:22:40,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:22:40,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1051 transitions. [2023-08-30 16:22:40,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 58.388888888888886) internal successors, (1051), 18 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:40,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 124.0) internal successors, (2356), 19 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:40,711 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 124.0) internal successors, (2356), 19 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:40,712 INFO L175 Difference]: Start difference. First operand has 69 places, 49 transitions, 586 flow. Second operand 18 states and 1051 transitions. [2023-08-30 16:22:40,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 119 transitions, 1453 flow [2023-08-30 16:22:40,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 119 transitions, 1310 flow, removed 59 selfloop flow, removed 5 redundant places. [2023-08-30 16:22:40,722 INFO L231 Difference]: Finished difference. Result has 91 places, 66 transitions, 944 flow [2023-08-30 16:22:40,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=944, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2023-08-30 16:22:40,724 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 73 predicate places. [2023-08-30 16:22:40,725 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 944 flow [2023-08-30 16:22:40,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.92307692307692) internal successors, (714), 13 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:40,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:22:40,725 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:22:40,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 16:22:40,929 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 [2023-08-30 16:22:40,930 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:22:40,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:22:40,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1657155026, now seen corresponding path program 6 times [2023-08-30 16:22:40,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:22:40,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261748193] [2023-08-30 16:22:40,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:22:40,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:22:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:22:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:40,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:22:40,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261748193] [2023-08-30 16:22:40,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261748193] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:22:40,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691738] [2023-08-30 16:22:40,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 16:22:40,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:22:40,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:22:40,999 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:22:41,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 16:22:41,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 16:22:41,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:22:41,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 16:22:41,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:22:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:41,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:22:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:41,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691738] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:22:41,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:22:41,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 16:22:41,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035905335] [2023-08-30 16:22:41,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:22:41,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 16:22:41,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:22:41,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 16:22:41,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-08-30 16:22:41,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 16:22:41,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 944 flow. Second operand has 14 states, 14 states have (on average 54.714285714285715) internal successors, (766), 14 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:41,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:22:41,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 16:22:41,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:22:41,433 INFO L130 PetriNetUnfolder]: 338/619 cut-off events. [2023-08-30 16:22:41,433 INFO L131 PetriNetUnfolder]: For 15431/15431 co-relation queries the response was YES. [2023-08-30 16:22:41,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4526 conditions, 619 events. 338/619 cut-off events. For 15431/15431 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2646 event pairs, 27 based on Foata normal form. 24/643 useless extension candidates. Maximal degree in co-relation 4478. Up to 207 conditions per place. [2023-08-30 16:22:41,437 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 56 selfloop transitions, 60 changer transitions 19/135 dead transitions. [2023-08-30 16:22:41,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 135 transitions, 2183 flow [2023-08-30 16:22:41,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 16:22:41,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 16:22:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1046 transitions. [2023-08-30 16:22:41,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46863799283154123 [2023-08-30 16:22:41,440 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1046 transitions. [2023-08-30 16:22:41,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1046 transitions. [2023-08-30 16:22:41,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:22:41,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1046 transitions. [2023-08-30 16:22:41,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 58.111111111111114) internal successors, (1046), 18 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:41,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 124.0) internal successors, (2356), 19 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:41,444 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 124.0) internal successors, (2356), 19 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:41,445 INFO L175 Difference]: Start difference. First operand has 91 places, 66 transitions, 944 flow. Second operand 18 states and 1046 transitions. [2023-08-30 16:22:41,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 135 transitions, 2183 flow [2023-08-30 16:22:41,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 135 transitions, 1903 flow, removed 130 selfloop flow, removed 4 redundant places. [2023-08-30 16:22:41,465 INFO L231 Difference]: Finished difference. Result has 112 places, 82 transitions, 1311 flow [2023-08-30 16:22:41,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1311, PETRI_PLACES=112, PETRI_TRANSITIONS=82} [2023-08-30 16:22:41,465 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 94 predicate places. [2023-08-30 16:22:41,465 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 82 transitions, 1311 flow [2023-08-30 16:22:41,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 54.714285714285715) internal successors, (766), 14 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:41,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:22:41,466 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:22:41,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 16:22:41,673 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 [2023-08-30 16:22:41,673 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:22:41,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:22:41,674 INFO L85 PathProgramCache]: Analyzing trace with hash 929897188, now seen corresponding path program 7 times [2023-08-30 16:22:41,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:22:41,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027573419] [2023-08-30 16:22:41,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:22:41,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:22:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:22:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:41,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:22:41,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027573419] [2023-08-30 16:22:41,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027573419] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:22:41,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998732604] [2023-08-30 16:22:41,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 16:22:41,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:22:41,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:22:41,736 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:22:41,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 16:22:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:22:41,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 16:22:41,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:22:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:41,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:22:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:41,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998732604] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:22:41,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:22:41,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-30 16:22:41,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275817802] [2023-08-30 16:22:41,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:22:41,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 16:22:41,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:22:41,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 16:22:41,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-30 16:22:41,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 16:22:41,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 82 transitions, 1311 flow. Second operand has 15 states, 15 states have (on average 54.733333333333334) internal successors, (821), 15 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:41,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:22:41,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 16:22:41,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:22:42,247 INFO L130 PetriNetUnfolder]: 390/711 cut-off events. [2023-08-30 16:22:42,247 INFO L131 PetriNetUnfolder]: For 27776/27776 co-relation queries the response was YES. [2023-08-30 16:22:42,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5902 conditions, 711 events. 390/711 cut-off events. For 27776/27776 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3090 event pairs, 12 based on Foata normal form. 24/735 useless extension candidates. Maximal degree in co-relation 5847. Up to 238 conditions per place. [2023-08-30 16:22:42,251 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 45 selfloop transitions, 84 changer transitions 36/165 dead transitions. [2023-08-30 16:22:42,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 165 transitions, 2973 flow [2023-08-30 16:22:42,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 16:22:42,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 16:22:42,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1224 transitions. [2023-08-30 16:22:42,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700460829493088 [2023-08-30 16:22:42,254 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1224 transitions. [2023-08-30 16:22:42,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1224 transitions. [2023-08-30 16:22:42,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:22:42,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1224 transitions. [2023-08-30 16:22:42,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 58.285714285714285) internal successors, (1224), 21 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:42,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 124.0) internal successors, (2728), 22 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:42,260 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 124.0) internal successors, (2728), 22 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:42,260 INFO L175 Difference]: Start difference. First operand has 112 places, 82 transitions, 1311 flow. Second operand 21 states and 1224 transitions. [2023-08-30 16:22:42,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 165 transitions, 2973 flow [2023-08-30 16:22:42,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 165 transitions, 2401 flow, removed 246 selfloop flow, removed 12 redundant places. [2023-08-30 16:22:42,288 INFO L231 Difference]: Finished difference. Result has 130 places, 101 transitions, 1712 flow [2023-08-30 16:22:42,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=975, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1712, PETRI_PLACES=130, PETRI_TRANSITIONS=101} [2023-08-30 16:22:42,289 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 112 predicate places. [2023-08-30 16:22:42,289 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 101 transitions, 1712 flow [2023-08-30 16:22:42,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.733333333333334) internal successors, (821), 15 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:42,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:22:42,289 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:22:42,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 16:22:42,494 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 [2023-08-30 16:22:42,494 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:22:42,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:22:42,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1150765664, now seen corresponding path program 8 times [2023-08-30 16:22:42,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:22:42,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725464700] [2023-08-30 16:22:42,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:22:42,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:22:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:22:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:42,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:22:42,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725464700] [2023-08-30 16:22:42,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725464700] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:22:42,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42405958] [2023-08-30 16:22:42,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 16:22:42,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:22:42,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:22:42,603 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:22:42,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 16:22:42,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 16:22:42,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:22:42,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 16:22:42,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:22:42,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:42,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:22:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:42,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42405958] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:22:42,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:22:42,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-08-30 16:22:42,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602494554] [2023-08-30 16:22:42,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:22:42,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 16:22:42,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:22:42,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 16:22:42,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2023-08-30 16:22:42,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 16:22:42,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 101 transitions, 1712 flow. Second operand has 22 states, 22 states have (on average 54.5) internal successors, (1199), 22 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:42,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:22:42,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 16:22:42,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:22:43,465 INFO L130 PetriNetUnfolder]: 538/959 cut-off events. [2023-08-30 16:22:43,465 INFO L131 PetriNetUnfolder]: For 42829/42829 co-relation queries the response was YES. [2023-08-30 16:22:43,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8737 conditions, 959 events. 538/959 cut-off events. For 42829/42829 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4119 event pairs, 15 based on Foata normal form. 36/995 useless extension candidates. Maximal degree in co-relation 8675. Up to 330 conditions per place. [2023-08-30 16:22:43,472 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 60 selfloop transitions, 121 changer transitions 66/247 dead transitions. [2023-08-30 16:22:43,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 247 transitions, 4924 flow [2023-08-30 16:22:43,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 16:22:43,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 16:22:43,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2090 transitions. [2023-08-30 16:22:43,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681899641577061 [2023-08-30 16:22:43,475 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2090 transitions. [2023-08-30 16:22:43,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2090 transitions. [2023-08-30 16:22:43,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:22:43,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2090 transitions. [2023-08-30 16:22:43,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 58.05555555555556) internal successors, (2090), 36 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:43,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 124.0) internal successors, (4588), 37 states have internal predecessors, (4588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:43,483 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 124.0) internal successors, (4588), 37 states have internal predecessors, (4588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:43,483 INFO L175 Difference]: Start difference. First operand has 130 places, 101 transitions, 1712 flow. Second operand 36 states and 2090 transitions. [2023-08-30 16:22:43,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 247 transitions, 4924 flow [2023-08-30 16:22:43,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 247 transitions, 4317 flow, removed 265 selfloop flow, removed 14 redundant places. [2023-08-30 16:22:43,525 INFO L231 Difference]: Finished difference. Result has 169 places, 138 transitions, 2757 flow [2023-08-30 16:22:43,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2757, PETRI_PLACES=169, PETRI_TRANSITIONS=138} [2023-08-30 16:22:43,525 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 151 predicate places. [2023-08-30 16:22:43,525 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 138 transitions, 2757 flow [2023-08-30 16:22:43,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.5) internal successors, (1199), 22 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:43,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:22:43,526 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:22:43,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 16:22:43,737 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 [2023-08-30 16:22:43,737 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:22:43,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:22:43,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2052641735, now seen corresponding path program 9 times [2023-08-30 16:22:43,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:22:43,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316955378] [2023-08-30 16:22:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:22:43,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:22:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:22:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:43,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:22:43,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316955378] [2023-08-30 16:22:43,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316955378] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:22:43,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915863568] [2023-08-30 16:22:43,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 16:22:43,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:22:43,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:22:43,966 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:22:43,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 16:22:44,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-08-30 16:22:44,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:22:44,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 16:22:44,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:22:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:44,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:22:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:44,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915863568] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:22:44,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:22:44,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2023-08-30 16:22:44,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699501400] [2023-08-30 16:22:44,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:22:44,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 16:22:44,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:22:44,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 16:22:44,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=866, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 16:22:44,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 16:22:44,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 138 transitions, 2757 flow. Second operand has 34 states, 34 states have (on average 54.3235294117647) internal successors, (1847), 34 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:44,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:22:44,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 16:22:44,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:22:45,105 INFO L130 PetriNetUnfolder]: 674/1231 cut-off events. [2023-08-30 16:22:45,106 INFO L131 PetriNetUnfolder]: For 90353/90353 co-relation queries the response was YES. [2023-08-30 16:22:45,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13996 conditions, 1231 events. 674/1231 cut-off events. For 90353/90353 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 5569 event pairs, 99 based on Foata normal form. 24/1255 useless extension candidates. Maximal degree in co-relation 13921. Up to 466 conditions per place. [2023-08-30 16:22:45,116 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 113 selfloop transitions, 100 changer transitions 71/284 dead transitions. [2023-08-30 16:22:45,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 284 transitions, 6988 flow [2023-08-30 16:22:45,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-30 16:22:45,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-30 16:22:45,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2185 transitions. [2023-08-30 16:22:45,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4637096774193548 [2023-08-30 16:22:45,119 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2185 transitions. [2023-08-30 16:22:45,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2185 transitions. [2023-08-30 16:22:45,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:22:45,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2185 transitions. [2023-08-30 16:22:45,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 57.5) internal successors, (2185), 38 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:45,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 124.0) internal successors, (4836), 39 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:45,126 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 124.0) internal successors, (4836), 39 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:45,127 INFO L175 Difference]: Start difference. First operand has 169 places, 138 transitions, 2757 flow. Second operand 38 states and 2185 transitions. [2023-08-30 16:22:45,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 284 transitions, 6988 flow [2023-08-30 16:22:45,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 284 transitions, 5397 flow, removed 763 selfloop flow, removed 13 redundant places. [2023-08-30 16:22:45,271 INFO L231 Difference]: Finished difference. Result has 201 places, 172 transitions, 3027 flow [2023-08-30 16:22:45,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3027, PETRI_PLACES=201, PETRI_TRANSITIONS=172} [2023-08-30 16:22:45,272 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 183 predicate places. [2023-08-30 16:22:45,272 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 172 transitions, 3027 flow [2023-08-30 16:22:45,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 54.3235294117647) internal successors, (1847), 34 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:45,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:22:45,273 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:22:45,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 16:22:45,477 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 [2023-08-30 16:22:45,478 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:22:45,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:22:45,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1571369213, now seen corresponding path program 10 times [2023-08-30 16:22:45,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:22:45,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957336710] [2023-08-30 16:22:45,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:22:45,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:22:45,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:22:45,680 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:45,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:22:45,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957336710] [2023-08-30 16:22:45,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957336710] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:22:45,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121757631] [2023-08-30 16:22:45,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 16:22:45,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:22:45,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:22:45,682 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:22:45,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 16:22:45,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 16:22:45,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:22:45,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 16:22:45,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:22:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:45,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:22:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:46,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121757631] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:22:46,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:22:46,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2023-08-30 16:22:46,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300543642] [2023-08-30 16:22:46,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:22:46,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-30 16:22:46,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:22:46,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-30 16:22:46,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2023-08-30 16:22:46,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 16:22:46,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 172 transitions, 3027 flow. Second operand has 35 states, 35 states have (on average 54.34285714285714) internal successors, (1902), 35 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) [2023-08-30 16:22:46,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:22:46,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 16:22:46,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:22:47,067 INFO L130 PetriNetUnfolder]: 858/1595 cut-off events. [2023-08-30 16:22:47,068 INFO L131 PetriNetUnfolder]: For 147518/147518 co-relation queries the response was YES. [2023-08-30 16:22:47,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17908 conditions, 1595 events. 858/1595 cut-off events. For 147518/147518 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 7851 event pairs, 44 based on Foata normal form. 32/1627 useless extension candidates. Maximal degree in co-relation 17829. Up to 646 conditions per place. [2023-08-30 16:22:47,100 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 88 selfloop transitions, 180 changer transitions 83/351 dead transitions. [2023-08-30 16:22:47,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 351 transitions, 7742 flow [2023-08-30 16:22:47,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-30 16:22:47,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-30 16:22:47,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2538 transitions. [2023-08-30 16:22:47,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46517595307917886 [2023-08-30 16:22:47,104 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2538 transitions. [2023-08-30 16:22:47,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2538 transitions. [2023-08-30 16:22:47,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:22:47,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2538 transitions. [2023-08-30 16:22:47,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 57.68181818181818) internal successors, (2538), 44 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:47,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 124.0) internal successors, (5580), 45 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:47,113 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 124.0) internal successors, (5580), 45 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:47,113 INFO L175 Difference]: Start difference. First operand has 201 places, 172 transitions, 3027 flow. Second operand 44 states and 2538 transitions. [2023-08-30 16:22:47,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 351 transitions, 7742 flow [2023-08-30 16:22:47,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 351 transitions, 7093 flow, removed 257 selfloop flow, removed 17 redundant places. [2023-08-30 16:22:47,331 INFO L231 Difference]: Finished difference. Result has 238 places, 221 transitions, 4322 flow [2023-08-30 16:22:47,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=2562, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=4322, PETRI_PLACES=238, PETRI_TRANSITIONS=221} [2023-08-30 16:22:47,331 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 220 predicate places. [2023-08-30 16:22:47,332 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 221 transitions, 4322 flow [2023-08-30 16:22:47,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.34285714285714) internal successors, (1902), 35 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) [2023-08-30 16:22:47,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:22:47,332 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:22:47,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 16:22:47,537 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 [2023-08-30 16:22:47,537 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:22:47,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:22:47,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1553415691, now seen corresponding path program 11 times [2023-08-30 16:22:47,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:22:47,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350516392] [2023-08-30 16:22:47,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:22:47,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:22:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:22:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:47,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:22:47,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350516392] [2023-08-30 16:22:47,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350516392] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:22:47,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668087925] [2023-08-30 16:22:47,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 16:22:47,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:22:47,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:22:47,746 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:22:47,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 16:22:47,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-08-30 16:22:47,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:22:47,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 16:22:47,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:22:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:47,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:22:48,030 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:48,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668087925] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:22:48,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:22:48,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2023-08-30 16:22:48,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625539394] [2023-08-30 16:22:48,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:22:48,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-30 16:22:48,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:22:48,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-30 16:22:48,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2023-08-30 16:22:48,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 16:22:48,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 221 transitions, 4322 flow. Second operand has 34 states, 34 states have (on average 54.3235294117647) internal successors, (1847), 34 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:48,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:22:48,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 16:22:48,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:22:49,034 INFO L130 PetriNetUnfolder]: 1022/1891 cut-off events. [2023-08-30 16:22:49,034 INFO L131 PetriNetUnfolder]: For 245129/245129 co-relation queries the response was YES. [2023-08-30 16:22:49,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24168 conditions, 1891 events. 1022/1891 cut-off events. For 245129/245129 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 9476 event pairs, 16 based on Foata normal form. 32/1923 useless extension candidates. Maximal degree in co-relation 24077. Up to 778 conditions per place. [2023-08-30 16:22:49,051 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 81 selfloop transitions, 233 changer transitions 67/381 dead transitions. [2023-08-30 16:22:49,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 381 transitions, 9460 flow [2023-08-30 16:22:49,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-30 16:22:49,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-30 16:22:49,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2427 transitions. [2023-08-30 16:22:49,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46601382488479265 [2023-08-30 16:22:49,054 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2427 transitions. [2023-08-30 16:22:49,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2427 transitions. [2023-08-30 16:22:49,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:22:49,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2427 transitions. [2023-08-30 16:22:49,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 57.785714285714285) internal successors, (2427), 42 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:49,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 124.0) internal successors, (5332), 43 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:49,062 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 124.0) internal successors, (5332), 43 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:49,062 INFO L175 Difference]: Start difference. First operand has 238 places, 221 transitions, 4322 flow. Second operand 42 states and 2427 transitions. [2023-08-30 16:22:49,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 381 transitions, 9460 flow [2023-08-30 16:22:49,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 381 transitions, 8550 flow, removed 365 selfloop flow, removed 18 redundant places. [2023-08-30 16:22:49,389 INFO L231 Difference]: Finished difference. Result has 275 places, 258 transitions, 5412 flow [2023-08-30 16:22:49,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=3436, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=5412, PETRI_PLACES=275, PETRI_TRANSITIONS=258} [2023-08-30 16:22:49,390 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 257 predicate places. [2023-08-30 16:22:49,390 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 258 transitions, 5412 flow [2023-08-30 16:22:49,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 54.3235294117647) internal successors, (1847), 34 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:49,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:22:49,391 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:22:49,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 16:22:49,594 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 [2023-08-30 16:22:49,595 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:22:49,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:22:49,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1171636794, now seen corresponding path program 12 times [2023-08-30 16:22:49,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:22:49,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32905189] [2023-08-30 16:22:49,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:22:49,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:22:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:22:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:49,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:22:49,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32905189] [2023-08-30 16:22:49,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32905189] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:22:49,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216895294] [2023-08-30 16:22:49,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 16:22:49,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:22:49,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:22:49,793 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:22:49,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 16:22:49,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-08-30 16:22:49,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 16:22:49,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 16:22:49,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:22:49,925 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:49,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:22:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:50,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216895294] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:22:50,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:22:50,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2023-08-30 16:22:50,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900890918] [2023-08-30 16:22:50,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:22:50,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 16:22:50,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:22:50,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 16:22:50,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1086, Unknown=0, NotChecked=0, Total=1406 [2023-08-30 16:22:50,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 16:22:50,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 258 transitions, 5412 flow. Second operand has 38 states, 38 states have (on average 54.28947368421053) internal successors, (2063), 38 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:50,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:22:50,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 16:22:50,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:22:51,282 INFO L130 PetriNetUnfolder]: 1034/1911 cut-off events. [2023-08-30 16:22:51,283 INFO L131 PetriNetUnfolder]: For 341708/341708 co-relation queries the response was YES. [2023-08-30 16:22:51,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26921 conditions, 1911 events. 1034/1911 cut-off events. For 341708/341708 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 9630 event pairs, 20 based on Foata normal form. 20/1931 useless extension candidates. Maximal degree in co-relation 26815. Up to 774 conditions per place. [2023-08-30 16:22:51,302 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 68 selfloop transitions, 243 changer transitions 74/385 dead transitions. [2023-08-30 16:22:51,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 385 transitions, 10213 flow [2023-08-30 16:22:51,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 16:22:51,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 16:22:51,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2311 transitions. [2023-08-30 16:22:51,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659274193548387 [2023-08-30 16:22:51,305 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2311 transitions. [2023-08-30 16:22:51,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2311 transitions. [2023-08-30 16:22:51,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:22:51,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2311 transitions. [2023-08-30 16:22:51,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 57.775) internal successors, (2311), 40 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:51,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 124.0) internal successors, (5084), 41 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:51,312 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 124.0) internal successors, (5084), 41 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:51,312 INFO L175 Difference]: Start difference. First operand has 275 places, 258 transitions, 5412 flow. Second operand 40 states and 2311 transitions. [2023-08-30 16:22:51,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 385 transitions, 10213 flow [2023-08-30 16:22:51,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 385 transitions, 8925 flow, removed 532 selfloop flow, removed 20 redundant places. [2023-08-30 16:22:51,825 INFO L231 Difference]: Finished difference. Result has 301 places, 267 transitions, 5360 flow [2023-08-30 16:22:51,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=4214, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=5360, PETRI_PLACES=301, PETRI_TRANSITIONS=267} [2023-08-30 16:22:51,825 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 283 predicate places. [2023-08-30 16:22:51,825 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 267 transitions, 5360 flow [2023-08-30 16:22:51,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 54.28947368421053) internal successors, (2063), 38 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:51,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:22:51,826 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:22:51,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-30 16:22:52,030 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 [2023-08-30 16:22:52,030 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:22:52,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:22:52,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1027063943, now seen corresponding path program 13 times [2023-08-30 16:22:52,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:22:52,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594835571] [2023-08-30 16:22:52,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:22:52,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:22:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:22:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:52,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:22:52,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594835571] [2023-08-30 16:22:52,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594835571] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 16:22:52,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030478007] [2023-08-30 16:22:52,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 16:22:52,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 16:22:52,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:22:52,252 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 16:22:52,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 16:22:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:22:52,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 16:22:52,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 16:22:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:52,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 16:22:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:22:52,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030478007] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 16:22:52,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 16:22:52,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 26 [2023-08-30 16:22:52,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947044216] [2023-08-30 16:22:52,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 16:22:52,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 16:22:52,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:22:52,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 16:22:52,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2023-08-30 16:22:52,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-08-30 16:22:52,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 267 transitions, 5360 flow. Second operand has 28 states, 28 states have (on average 54.42857142857143) internal successors, (1524), 28 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:52,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:22:52,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-08-30 16:22:52,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:22:53,782 INFO L130 PetriNetUnfolder]: 1134/2087 cut-off events. [2023-08-30 16:22:53,782 INFO L131 PetriNetUnfolder]: For 405135/405135 co-relation queries the response was YES. [2023-08-30 16:22:53,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30427 conditions, 2087 events. 1134/2087 cut-off events. For 405135/405135 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 10528 event pairs, 15 based on Foata normal form. 20/2107 useless extension candidates. Maximal degree in co-relation 30315. Up to 834 conditions per place. [2023-08-30 16:22:53,801 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 80 selfloop transitions, 270 changer transitions 90/440 dead transitions. [2023-08-30 16:22:53,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 440 transitions, 11869 flow [2023-08-30 16:22:53,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-30 16:22:53,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-30 16:22:53,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2776 transitions. [2023-08-30 16:22:53,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46639784946236557 [2023-08-30 16:22:53,805 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2776 transitions. [2023-08-30 16:22:53,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2776 transitions. [2023-08-30 16:22:53,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:22:53,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2776 transitions. [2023-08-30 16:22:53,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 57.833333333333336) internal successors, (2776), 48 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:53,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 124.0) internal successors, (6076), 49 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:53,812 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 124.0) internal successors, (6076), 49 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:53,812 INFO L175 Difference]: Start difference. First operand has 301 places, 267 transitions, 5360 flow. Second operand 48 states and 2776 transitions. [2023-08-30 16:22:53,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 440 transitions, 11869 flow [2023-08-30 16:22:54,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 440 transitions, 10278 flow, removed 582 selfloop flow, removed 33 redundant places. [2023-08-30 16:22:54,496 INFO L231 Difference]: Finished difference. Result has 325 places, 292 transitions, 6204 flow [2023-08-30 16:22:54,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=4445, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=6204, PETRI_PLACES=325, PETRI_TRANSITIONS=292} [2023-08-30 16:22:54,497 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 307 predicate places. [2023-08-30 16:22:54,497 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 292 transitions, 6204 flow [2023-08-30 16:22:54,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 54.42857142857143) internal successors, (1524), 28 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 16:22:54,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:22:54,497 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:22:54,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 16:22:54,698 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 [2023-08-30 16:22:54,698 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 16:22:54,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:22:54,698 INFO L85 PathProgramCache]: Analyzing trace with hash -697905322, now seen corresponding path program 14 times [2023-08-30 16:22:54,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:22:54,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945610579] [2023-08-30 16:22:54,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:22:54,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:22:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:22:54,711 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:22:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:22:54,748 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:22:54,755 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:22:54,756 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-30 16:22:54,757 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-30 16:22:54,757 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-30 16:22:54,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 16:22:54,758 INFO L445 BasicCegarLoop]: Path program histogram: [14, 2, 1] [2023-08-30 16:22:54,761 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 16:22:54,761 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 16:22:54,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 04:22:54 BasicIcfg [2023-08-30 16:22:54,813 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 16:22:54,813 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 16:22:54,813 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 16:22:54,813 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 16:22:54,814 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:22:36" (3/4) ... [2023-08-30 16:22:54,815 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-08-30 16:22:54,853 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 16:22:54,853 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 16:22:54,853 INFO L158 Benchmark]: Toolchain (without parser) took 19190.89ms. Allocated memory was 92.3MB in the beginning and 474.0MB in the end (delta: 381.7MB). Free memory was 68.8MB in the beginning and 129.5MB in the end (delta: -60.7MB). Peak memory consumption was 322.6MB. Max. memory is 16.1GB. [2023-08-30 16:22:54,853 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 67.1MB. Free memory is still 45.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 16:22:54,854 INFO L158 Benchmark]: CACSL2BoogieTranslator took 380.54ms. Allocated memory is still 92.3MB. Free memory was 68.5MB in the beginning and 71.6MB in the end (delta: -3.0MB). Peak memory consumption was 25.7MB. Max. memory is 16.1GB. [2023-08-30 16:22:54,854 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.81ms. Allocated memory is still 92.3MB. Free memory was 71.6MB in the beginning and 69.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 16:22:54,854 INFO L158 Benchmark]: Boogie Preprocessor took 31.97ms. Allocated memory is still 92.3MB. Free memory was 69.5MB in the beginning and 68.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 16:22:54,854 INFO L158 Benchmark]: RCFGBuilder took 325.39ms. Allocated memory is still 92.3MB. Free memory was 68.1MB in the beginning and 55.8MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-08-30 16:22:54,855 INFO L158 Benchmark]: TraceAbstraction took 18366.55ms. Allocated memory was 92.3MB in the beginning and 474.0MB in the end (delta: 381.7MB). Free memory was 55.2MB in the beginning and 136.8MB in the end (delta: -81.7MB). Peak memory consumption was 301.1MB. Max. memory is 16.1GB. [2023-08-30 16:22:54,855 INFO L158 Benchmark]: Witness Printer took 39.79ms. Allocated memory is still 474.0MB. Free memory was 136.8MB in the beginning and 129.5MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-08-30 16:22:54,856 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 67.1MB. Free memory is still 45.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 380.54ms. Allocated memory is still 92.3MB. Free memory was 68.5MB in the beginning and 71.6MB in the end (delta: -3.0MB). Peak memory consumption was 25.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.81ms. Allocated memory is still 92.3MB. Free memory was 71.6MB in the beginning and 69.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.97ms. Allocated memory is still 92.3MB. Free memory was 69.5MB in the beginning and 68.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 325.39ms. Allocated memory is still 92.3MB. Free memory was 68.1MB in the beginning and 55.8MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 18366.55ms. Allocated memory was 92.3MB in the beginning and 474.0MB in the end (delta: 381.7MB). Free memory was 55.2MB in the beginning and 136.8MB in the end (delta: -81.7MB). Peak memory consumption was 301.1MB. Max. memory is 16.1GB. * Witness Printer took 39.79ms. Allocated memory is still 474.0MB. Free memory was 136.8MB in the beginning and 129.5MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.5s, 66 PlacesBefore, 18 PlacesAfterwards, 64 TransitionsBefore, 14 TransitionsAfterwards, 1078 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 2 ChoiceCompositions, 58 TotalNumberOfCompositions, 999 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 856, independent: 829, independent conditional: 0, independent unconditional: 829, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 590, independent: 578, independent conditional: 0, independent unconditional: 578, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 856, independent: 251, independent conditional: 0, independent unconditional: 251, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 590, unknown conditional: 0, unknown unconditional: 590] , Statistics on independence cache: Total cache size (in pairs): 13, Positive cache size: 10, Positive conditional cache size: 0, Positive unconditional cache size: 10, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - 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; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, 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] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, i=3, id1={5:0}, id2={3:0}, j=6, k=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=7] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L716] 0 int condI = i >= (2*10 +6); VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, condI=0, i=7, id1={5:0}, id2={3:0}, j=6, k=0, k=1] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 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 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 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 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 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 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 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 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L719] 0 int condJ = j >= (2*10 +6); [L721] COND TRUE 0 condI || condJ [L722] 0 reach_error() VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, condI=0, condJ=1, i=25, id1={5:0}, id2={3:0}, j=26, k=10, k=10] - 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, 84 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: 18.2s, OverallIterations: 17, TraceHistogramMax: 10, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 9.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4612 SdHoareTripleChecker+Valid, 2.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4510 mSDsluCounter, 785 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 778 mSDsCounter, 456 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4723 IncrementalHoareTripleChecker+Invalid, 5179 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 456 mSolverCounterUnsat, 7 mSDtfsCounter, 4723 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 762 GetRequests, 215 SyntacticMatches, 14 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8624 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6204occurred in iteration=16, InterpolantAutomatonStates: 355, 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: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 436 NumberOfCodeBlocks, 436 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 2322 SizeOfPredicates, 98 NumberOfNonLiveVariables, 1590 ConjunctsInSsa, 160 ConjunctsInUnsatCore, 36 InterpolantComputations, 6 PerfectInterpolantSequences, 0/816 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! [2023-08-30 16:22:54,867 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