./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe008_tso.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe008_tso.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 3447fa4cbed8c2dd9f8bb92c4d44acca15639ccfd4d81b58d710cf11090f115c --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 23:18:45,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 23:18:45,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 23:18:45,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 23:18:45,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 23:18:45,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 23:18:45,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 23:18:45,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 23:18:45,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 23:18:45,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 23:18:45,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 23:18:45,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 23:18:45,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 23:18:45,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 23:18:45,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 23:18:45,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 23:18:45,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 23:18:45,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 23:18:45,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 23:18:45,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 23:18:45,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 23:18:45,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 23:18:45,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 23:18:45,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 23:18:45,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 23:18:45,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 23:18:45,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 23:18:45,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 23:18:45,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 23:18:45,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 23:18:45,878 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 23:18:45,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 23:18:45,886 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 23:18:45,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 23:18:45,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 23:18:45,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 23:18:45,889 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 23:18:45,889 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 23:18:45,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 23:18:45,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 23:18:45,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 23:18:45,891 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 23:18:45,924 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 23:18:45,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 23:18:45,926 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 23:18:45,926 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 23:18:45,927 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 23:18:45,927 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 23:18:45,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 23:18:45,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 23:18:45,927 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 23:18:45,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 23:18:45,928 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 23:18:45,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 23:18:45,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 23:18:45,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 23:18:45,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 23:18:45,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 23:18:45,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 23:18:45,929 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 23:18:45,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 23:18:45,930 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 23:18:45,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 23:18:45,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 23:18:45,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 23:18:45,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 23:18:45,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 23:18:45,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 23:18:45,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 23:18:45,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 23:18:45,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 23:18:45,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 23:18:45,932 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 23:18:45,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 23:18:45,932 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 23:18:45,932 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 23:18:45,932 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 23:18:45,932 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3447fa4cbed8c2dd9f8bb92c4d44acca15639ccfd4d81b58d710cf11090f115c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 23:18:46,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 23:18:46,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 23:18:46,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 23:18:46,265 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 23:18:46,265 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 23:18:46,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe008_tso.i [2023-08-30 23:18:47,511 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 23:18:47,795 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 23:18:47,795 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe008_tso.i [2023-08-30 23:18:47,809 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0085f3145/53263313b0184c3fb7b86bac1f870e19/FLAG4d5576c52 [2023-08-30 23:18:47,823 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0085f3145/53263313b0184c3fb7b86bac1f870e19 [2023-08-30 23:18:47,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 23:18:47,826 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 23:18:47,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 23:18:47,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 23:18:47,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 23:18:47,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:18:47" (1/1) ... [2023-08-30 23:18:47,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c12c32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:18:47, skipping insertion in model container [2023-08-30 23:18:47,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:18:47" (1/1) ... [2023-08-30 23:18:47,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 23:18:47,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 23:18:47,993 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-wmm/safe008_tso.i[945,958] [2023-08-30 23:18:48,101 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 23:18:48,110 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 23:18:48,120 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-wmm/safe008_tso.i[945,958] [2023-08-30 23:18:48,150 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 23:18:48,198 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 23:18:48,198 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 23:18:48,223 INFO L208 MainTranslator]: Completed translation [2023-08-30 23:18:48,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:18:48 WrapperNode [2023-08-30 23:18:48,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 23:18:48,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 23:18:48,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 23:18:48,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 23:18:48,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:18:48" (1/1) ... [2023-08-30 23:18:48,261 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:18:48" (1/1) ... [2023-08-30 23:18:48,284 INFO L138 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2023-08-30 23:18:48,284 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 23:18:48,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 23:18:48,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 23:18:48,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 23:18:48,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:18:48" (1/1) ... [2023-08-30 23:18:48,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:18:48" (1/1) ... [2023-08-30 23:18:48,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:18:48" (1/1) ... [2023-08-30 23:18:48,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:18:48" (1/1) ... [2023-08-30 23:18:48,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:18:48" (1/1) ... [2023-08-30 23:18:48,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:18:48" (1/1) ... [2023-08-30 23:18:48,322 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:18:48" (1/1) ... [2023-08-30 23:18:48,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:18:48" (1/1) ... [2023-08-30 23:18:48,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 23:18:48,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 23:18:48,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 23:18:48,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 23:18:48,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:18:48" (1/1) ... [2023-08-30 23:18:48,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 23:18:48,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 23:18:48,370 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 23:18:48,391 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 23:18:48,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 23:18:48,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 23:18:48,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 23:18:48,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 23:18:48,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 23:18:48,406 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-30 23:18:48,407 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-30 23:18:48,407 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-30 23:18:48,407 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-30 23:18:48,407 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-30 23:18:48,407 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-30 23:18:48,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 23:18:48,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 23:18:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 23:18:48,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 23:18:48,409 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 23:18:48,580 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 23:18:48,582 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 23:18:48,764 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 23:18:48,773 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 23:18:48,774 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-30 23:18:48,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:18:48 BoogieIcfgContainer [2023-08-30 23:18:48,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 23:18:48,781 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 23:18:48,781 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 23:18:48,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 23:18:48,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:18:47" (1/3) ... [2023-08-30 23:18:48,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98b7642 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:18:48, skipping insertion in model container [2023-08-30 23:18:48,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:18:48" (2/3) ... [2023-08-30 23:18:48,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@98b7642 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:18:48, skipping insertion in model container [2023-08-30 23:18:48,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:18:48" (3/3) ... [2023-08-30 23:18:48,786 INFO L112 eAbstractionObserver]: Analyzing ICFG safe008_tso.i [2023-08-30 23:18:48,794 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 23:18:48,803 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 23:18:48,803 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 23:18:48,803 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 23:18:48,882 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:18:48,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 85 transitions, 185 flow [2023-08-30 23:18:48,992 INFO L130 PetriNetUnfolder]: 2/82 cut-off events. [2023-08-30 23:18:48,992 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:18:48,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 82 events. 2/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2023-08-30 23:18:48,998 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 85 transitions, 185 flow [2023-08-30 23:18:49,001 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 70 transitions, 149 flow [2023-08-30 23:18:49,004 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:18:49,012 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 70 transitions, 149 flow [2023-08-30 23:18:49,015 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 70 transitions, 149 flow [2023-08-30 23:18:49,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 70 transitions, 149 flow [2023-08-30 23:18:49,030 INFO L130 PetriNetUnfolder]: 1/70 cut-off events. [2023-08-30 23:18:49,031 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:18:49,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 70 events. 1/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 38 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-08-30 23:18:49,032 INFO L119 LiptonReduction]: Number of co-enabled transitions 1044 [2023-08-30 23:18:50,955 INFO L134 LiptonReduction]: Checked pairs total: 1927 [2023-08-30 23:18:50,955 INFO L136 LiptonReduction]: Total number of compositions: 56 [2023-08-30 23:18:50,967 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:18:50,972 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;@53a1a58b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:18:50,973 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 23:18:50,977 INFO L130 PetriNetUnfolder]: 0/15 cut-off events. [2023-08-30 23:18:50,977 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:18:50,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:18:50,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:18:50,982 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:18:50,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:18:50,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1968690569, now seen corresponding path program 1 times [2023-08-30 23:18:50,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:18:50,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289874285] [2023-08-30 23:18:50,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:18:50,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:18:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:18:51,542 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 23:18:51,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:18:51,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289874285] [2023-08-30 23:18:51,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289874285] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:18:51,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:18:51,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:18:51,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668753389] [2023-08-30 23:18:51,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:18:51,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:18:51,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:18:51,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:18:51,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:18:51,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 141 [2023-08-30 23:18:51,604 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 17 transitions, 43 flow. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 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 23:18:51,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:18:51,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 141 [2023-08-30 23:18:51,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:18:51,734 INFO L130 PetriNetUnfolder]: 265/479 cut-off events. [2023-08-30 23:18:51,734 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 23:18:51,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 955 conditions, 479 events. 265/479 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2321 event pairs, 106 based on Foata normal form. 19/498 useless extension candidates. Maximal degree in co-relation 944. Up to 331 conditions per place. [2023-08-30 23:18:51,743 INFO L137 encePairwiseOnDemand]: 135/141 looper letters, 21 selfloop transitions, 5 changer transitions 0/28 dead transitions. [2023-08-30 23:18:51,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 123 flow [2023-08-30 23:18:51,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:18:51,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:18:51,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2023-08-30 23:18:51,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2023-08-30 23:18:51,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2023-08-30 23:18:51,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2023-08-30 23:18:51,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:18:51,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2023-08-30 23:18:51,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 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 23:18:51,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 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 23:18:51,775 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 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 23:18:51,776 INFO L175 Difference]: Start difference. First operand has 27 places, 17 transitions, 43 flow. Second operand 3 states and 243 transitions. [2023-08-30 23:18:51,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 123 flow [2023-08-30 23:18:51,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 28 transitions, 118 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 23:18:51,781 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 69 flow [2023-08-30 23:18:51,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-08-30 23:18:51,789 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2023-08-30 23:18:51,790 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 69 flow [2023-08-30 23:18:51,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 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 23:18:51,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:18:51,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:18:51,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 23:18:51,800 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:18:51,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:18:51,808 INFO L85 PathProgramCache]: Analyzing trace with hash 899864881, now seen corresponding path program 1 times [2023-08-30 23:18:51,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:18:51,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479346276] [2023-08-30 23:18:51,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:18:51,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:18:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:18:52,006 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 23:18:52,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:18:52,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479346276] [2023-08-30 23:18:52,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479346276] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:18:52,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:18:52,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:18:52,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843643549] [2023-08-30 23:18:52,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:18:52,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:18:52,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:18:52,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:18:52,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:18:52,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 141 [2023-08-30 23:18:52,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 0 states have call successors, (0), 0 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 23:18:52,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:18:52,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 141 [2023-08-30 23:18:52,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:18:52,107 INFO L130 PetriNetUnfolder]: 237/433 cut-off events. [2023-08-30 23:18:52,107 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2023-08-30 23:18:52,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 433 events. 237/433 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2074 event pairs, 49 based on Foata normal form. 9/441 useless extension candidates. Maximal degree in co-relation 1057. Up to 245 conditions per place. [2023-08-30 23:18:52,110 INFO L137 encePairwiseOnDemand]: 136/141 looper letters, 26 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2023-08-30 23:18:52,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 33 transitions, 169 flow [2023-08-30 23:18:52,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 23:18:52,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 23:18:52,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2023-08-30 23:18:52,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5620567375886525 [2023-08-30 23:18:52,115 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 317 transitions. [2023-08-30 23:18:52,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 317 transitions. [2023-08-30 23:18:52,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:18:52,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 317 transitions. [2023-08-30 23:18:52,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 79.25) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 0 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 23:18:52,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 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 23:18:52,121 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 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 23:18:52,121 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 69 flow. Second operand 4 states and 317 transitions. [2023-08-30 23:18:52,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 33 transitions, 169 flow [2023-08-30 23:18:52,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 33 transitions, 162 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:18:52,124 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 98 flow [2023-08-30 23:18:52,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2023-08-30 23:18:52,125 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-08-30 23:18:52,125 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 98 flow [2023-08-30 23:18:52,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 0 states have call successors, (0), 0 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 23:18:52,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:18:52,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:18:52,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 23:18:52,126 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:18:52,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:18:52,128 INFO L85 PathProgramCache]: Analyzing trace with hash 899864850, now seen corresponding path program 1 times [2023-08-30 23:18:52,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:18:52,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824153964] [2023-08-30 23:18:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:18:52,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:18:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:18:52,320 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 23:18:52,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:18:52,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824153964] [2023-08-30 23:18:52,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824153964] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:18:52,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:18:52,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:18:52,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294817159] [2023-08-30 23:18:52,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:18:52,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:18:52,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:18:52,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:18:52,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:18:52,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 141 [2023-08-30 23:18:52,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 0 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 23:18:52,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:18:52,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 141 [2023-08-30 23:18:52,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:18:52,480 INFO L130 PetriNetUnfolder]: 414/718 cut-off events. [2023-08-30 23:18:52,480 INFO L131 PetriNetUnfolder]: For 632/632 co-relation queries the response was YES. [2023-08-30 23:18:52,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1936 conditions, 718 events. 414/718 cut-off events. For 632/632 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3659 event pairs, 84 based on Foata normal form. 32/748 useless extension candidates. Maximal degree in co-relation 1921. Up to 233 conditions per place. [2023-08-30 23:18:52,485 INFO L137 encePairwiseOnDemand]: 134/141 looper letters, 37 selfloop transitions, 15 changer transitions 1/54 dead transitions. [2023-08-30 23:18:52,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 54 transitions, 324 flow [2023-08-30 23:18:52,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 23:18:52,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 23:18:52,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 400 transitions. [2023-08-30 23:18:52,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2023-08-30 23:18:52,487 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 400 transitions. [2023-08-30 23:18:52,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 400 transitions. [2023-08-30 23:18:52,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:18:52,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 400 transitions. [2023-08-30 23:18:52,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 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 23:18:52,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:18:52,490 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:18:52,490 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 98 flow. Second operand 5 states and 400 transitions. [2023-08-30 23:18:52,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 54 transitions, 324 flow [2023-08-30 23:18:52,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 54 transitions, 319 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:18:52,494 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 215 flow [2023-08-30 23:18:52,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=215, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2023-08-30 23:18:52,494 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 11 predicate places. [2023-08-30 23:18:52,495 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 215 flow [2023-08-30 23:18:52,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 0 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 23:18:52,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:18:52,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:18:52,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 23:18:52,496 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:18:52,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:18:52,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2142610716, now seen corresponding path program 1 times [2023-08-30 23:18:52,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:18:52,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182687986] [2023-08-30 23:18:52,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:18:52,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:18:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:18:52,620 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 23:18:52,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:18:52,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182687986] [2023-08-30 23:18:52,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182687986] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:18:52,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:18:52,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:18:52,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397387964] [2023-08-30 23:18:52,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:18:52,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 23:18:52,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:18:52,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 23:18:52,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 23:18:52,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 141 [2023-08-30 23:18:52,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 215 flow. Second operand has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 states have internal predecessors, (360), 0 states have call successors, (0), 0 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 23:18:52,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:18:52,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 141 [2023-08-30 23:18:52,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:18:52,749 INFO L130 PetriNetUnfolder]: 439/788 cut-off events. [2023-08-30 23:18:52,749 INFO L131 PetriNetUnfolder]: For 1350/1350 co-relation queries the response was YES. [2023-08-30 23:18:52,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2507 conditions, 788 events. 439/788 cut-off events. For 1350/1350 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4332 event pairs, 113 based on Foata normal form. 26/808 useless extension candidates. Maximal degree in co-relation 2488. Up to 316 conditions per place. [2023-08-30 23:18:52,753 INFO L137 encePairwiseOnDemand]: 136/141 looper letters, 32 selfloop transitions, 6 changer transitions 12/51 dead transitions. [2023-08-30 23:18:52,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 382 flow [2023-08-30 23:18:52,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 23:18:52,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 23:18:52,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 390 transitions. [2023-08-30 23:18:52,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2023-08-30 23:18:52,755 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 390 transitions. [2023-08-30 23:18:52,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 390 transitions. [2023-08-30 23:18:52,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:18:52,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 390 transitions. [2023-08-30 23:18:52,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 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 23:18:52,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:18:52,759 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:18:52,759 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 215 flow. Second operand 5 states and 390 transitions. [2023-08-30 23:18:52,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 382 flow [2023-08-30 23:18:52,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 51 transitions, 382 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 23:18:52,764 INFO L231 Difference]: Finished difference. Result has 44 places, 23 transitions, 161 flow [2023-08-30 23:18:52,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=44, PETRI_TRANSITIONS=23} [2023-08-30 23:18:52,764 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2023-08-30 23:18:52,765 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 23 transitions, 161 flow [2023-08-30 23:18:52,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 states have internal predecessors, (360), 0 states have call successors, (0), 0 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 23:18:52,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:18:52,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:18:52,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 23:18:52,766 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:18:52,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:18:52,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1267758802, now seen corresponding path program 1 times [2023-08-30 23:18:52,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:18:52,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045938704] [2023-08-30 23:18:52,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:18:52,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:18:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:18:52,934 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 23:18:52,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:18:52,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045938704] [2023-08-30 23:18:52,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045938704] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:18:52,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:18:52,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:18:52,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303037485] [2023-08-30 23:18:52,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:18:52,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:18:52,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:18:52,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:18:52,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:18:52,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 141 [2023-08-30 23:18:52,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 23 transitions, 161 flow. Second operand has 4 states, 4 states have (on average 74.5) internal successors, (298), 4 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 23:18:52,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:18:52,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 141 [2023-08-30 23:18:52,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:18:52,997 INFO L130 PetriNetUnfolder]: 155/297 cut-off events. [2023-08-30 23:18:52,997 INFO L131 PetriNetUnfolder]: For 636/636 co-relation queries the response was YES. [2023-08-30 23:18:52,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 297 events. 155/297 cut-off events. For 636/636 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1211 event pairs, 34 based on Foata normal form. 4/298 useless extension candidates. Maximal degree in co-relation 1041. Up to 130 conditions per place. [2023-08-30 23:18:52,999 INFO L137 encePairwiseOnDemand]: 135/141 looper letters, 21 selfloop transitions, 8 changer transitions 0/32 dead transitions. [2023-08-30 23:18:53,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 32 transitions, 255 flow [2023-08-30 23:18:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 23:18:53,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 23:18:53,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 315 transitions. [2023-08-30 23:18:53,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2023-08-30 23:18:53,001 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 315 transitions. [2023-08-30 23:18:53,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 315 transitions. [2023-08-30 23:18:53,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:18:53,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 315 transitions. [2023-08-30 23:18:53,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 0 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 23:18:53,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 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 23:18:53,004 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 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 23:18:53,004 INFO L175 Difference]: Start difference. First operand has 44 places, 23 transitions, 161 flow. Second operand 4 states and 315 transitions. [2023-08-30 23:18:53,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 32 transitions, 255 flow [2023-08-30 23:18:53,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 32 transitions, 191 flow, removed 12 selfloop flow, removed 9 redundant places. [2023-08-30 23:18:53,007 INFO L231 Difference]: Finished difference. Result has 40 places, 24 transitions, 139 flow [2023-08-30 23:18:53,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=40, PETRI_TRANSITIONS=24} [2023-08-30 23:18:53,008 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 13 predicate places. [2023-08-30 23:18:53,008 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 24 transitions, 139 flow [2023-08-30 23:18:53,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.5) internal successors, (298), 4 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 23:18:53,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:18:53,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:18:53,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 23:18:53,009 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:18:53,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:18:53,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1785980554, now seen corresponding path program 1 times [2023-08-30 23:18:53,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:18:53,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138306968] [2023-08-30 23:18:53,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:18:53,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:18:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:18:53,125 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 23:18:53,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:18:53,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138306968] [2023-08-30 23:18:53,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138306968] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:18:53,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:18:53,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:18:53,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102779068] [2023-08-30 23:18:53,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:18:53,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:18:53,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:18:53,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:18:53,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:18:53,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 141 [2023-08-30 23:18:53,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 24 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 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 23:18:53,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:18:53,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 141 [2023-08-30 23:18:53,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:18:53,213 INFO L130 PetriNetUnfolder]: 248/439 cut-off events. [2023-08-30 23:18:53,213 INFO L131 PetriNetUnfolder]: For 726/726 co-relation queries the response was YES. [2023-08-30 23:18:53,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1382 conditions, 439 events. 248/439 cut-off events. For 726/726 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1708 event pairs, 36 based on Foata normal form. 6/445 useless extension candidates. Maximal degree in co-relation 1364. Up to 135 conditions per place. [2023-08-30 23:18:53,216 INFO L137 encePairwiseOnDemand]: 134/141 looper letters, 31 selfloop transitions, 13 changer transitions 3/49 dead transitions. [2023-08-30 23:18:53,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 350 flow [2023-08-30 23:18:53,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 23:18:53,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 23:18:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 392 transitions. [2023-08-30 23:18:53,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560283687943263 [2023-08-30 23:18:53,217 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 392 transitions. [2023-08-30 23:18:53,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 392 transitions. [2023-08-30 23:18:53,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:18:53,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 392 transitions. [2023-08-30 23:18:53,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 78.4) internal successors, (392), 5 states have internal predecessors, (392), 0 states have call successors, (0), 0 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 23:18:53,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:18:53,220 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:18:53,220 INFO L175 Difference]: Start difference. First operand has 40 places, 24 transitions, 139 flow. Second operand 5 states and 392 transitions. [2023-08-30 23:18:53,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 350 flow [2023-08-30 23:18:53,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:18:53,223 INFO L231 Difference]: Finished difference. Result has 45 places, 30 transitions, 231 flow [2023-08-30 23:18:53,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=45, PETRI_TRANSITIONS=30} [2023-08-30 23:18:53,224 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 18 predicate places. [2023-08-30 23:18:53,224 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 30 transitions, 231 flow [2023-08-30 23:18:53,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 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 23:18:53,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:18:53,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:18:53,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 23:18:53,225 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:18:53,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:18:53,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1761155484, now seen corresponding path program 2 times [2023-08-30 23:18:53,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:18:53,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414170241] [2023-08-30 23:18:53,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:18:53,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:18:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:18:53,355 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 23:18:53,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:18:53,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414170241] [2023-08-30 23:18:53,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414170241] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:18:53,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:18:53,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:18:53,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565114728] [2023-08-30 23:18:53,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:18:53,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 23:18:53,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:18:53,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 23:18:53,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 23:18:53,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 141 [2023-08-30 23:18:53,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 30 transitions, 231 flow. Second operand has 5 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 0 states have call successors, (0), 0 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 23:18:53,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:18:53,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 141 [2023-08-30 23:18:53,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:18:53,450 INFO L130 PetriNetUnfolder]: 235/425 cut-off events. [2023-08-30 23:18:53,450 INFO L131 PetriNetUnfolder]: For 1065/1065 co-relation queries the response was YES. [2023-08-30 23:18:53,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1460 conditions, 425 events. 235/425 cut-off events. For 1065/1065 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1711 event pairs, 83 based on Foata normal form. 18/442 useless extension candidates. Maximal degree in co-relation 1439. Up to 178 conditions per place. [2023-08-30 23:18:53,452 INFO L137 encePairwiseOnDemand]: 136/141 looper letters, 21 selfloop transitions, 4 changer transitions 17/43 dead transitions. [2023-08-30 23:18:53,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 353 flow [2023-08-30 23:18:53,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 23:18:53,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 23:18:53,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 383 transitions. [2023-08-30 23:18:53,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432624113475177 [2023-08-30 23:18:53,454 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 383 transitions. [2023-08-30 23:18:53,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 383 transitions. [2023-08-30 23:18:53,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:18:53,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 383 transitions. [2023-08-30 23:18:53,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 76.6) internal successors, (383), 5 states have internal predecessors, (383), 0 states have call successors, (0), 0 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 23:18:53,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:18:53,458 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:18:53,458 INFO L175 Difference]: Start difference. First operand has 45 places, 30 transitions, 231 flow. Second operand 5 states and 383 transitions. [2023-08-30 23:18:53,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 353 flow [2023-08-30 23:18:53,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 43 transitions, 353 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 23:18:53,463 INFO L231 Difference]: Finished difference. Result has 51 places, 17 transitions, 116 flow [2023-08-30 23:18:53,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=51, PETRI_TRANSITIONS=17} [2023-08-30 23:18:53,464 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 24 predicate places. [2023-08-30 23:18:53,464 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 17 transitions, 116 flow [2023-08-30 23:18:53,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 0 states have call successors, (0), 0 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 23:18:53,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:18:53,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:18:53,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 23:18:53,466 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:18:53,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:18:53,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1190107942, now seen corresponding path program 1 times [2023-08-30 23:18:53,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:18:53,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079216480] [2023-08-30 23:18:53,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:18:53,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:18:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:18:53,634 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 23:18:53,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:18:53,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079216480] [2023-08-30 23:18:53,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079216480] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:18:53,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:18:53,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:18:53,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770497680] [2023-08-30 23:18:53,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:18:53,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:18:53,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:18:53,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:18:53,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:18:53,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 141 [2023-08-30 23:18:53,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 17 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 0 states have call successors, (0), 0 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 23:18:53,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:18:53,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 141 [2023-08-30 23:18:53,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:18:53,706 INFO L130 PetriNetUnfolder]: 62/137 cut-off events. [2023-08-30 23:18:53,706 INFO L131 PetriNetUnfolder]: For 434/436 co-relation queries the response was YES. [2023-08-30 23:18:53,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 137 events. 62/137 cut-off events. For 434/436 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 459 event pairs, 16 based on Foata normal form. 5/139 useless extension candidates. Maximal degree in co-relation 463. Up to 82 conditions per place. [2023-08-30 23:18:53,707 INFO L137 encePairwiseOnDemand]: 135/141 looper letters, 19 selfloop transitions, 3 changer transitions 13/38 dead transitions. [2023-08-30 23:18:53,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 38 transitions, 289 flow [2023-08-30 23:18:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 23:18:53,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 23:18:53,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 407 transitions. [2023-08-30 23:18:53,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577304964539007 [2023-08-30 23:18:53,709 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 407 transitions. [2023-08-30 23:18:53,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 407 transitions. [2023-08-30 23:18:53,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:18:53,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 407 transitions. [2023-08-30 23:18:53,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.4) internal successors, (407), 5 states have internal predecessors, (407), 0 states have call successors, (0), 0 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 23:18:53,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:18:53,712 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:18:53,712 INFO L175 Difference]: Start difference. First operand has 51 places, 17 transitions, 116 flow. Second operand 5 states and 407 transitions. [2023-08-30 23:18:53,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 38 transitions, 289 flow [2023-08-30 23:18:53,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 185 flow, removed 23 selfloop flow, removed 17 redundant places. [2023-08-30 23:18:53,714 INFO L231 Difference]: Finished difference. Result has 41 places, 19 transitions, 90 flow [2023-08-30 23:18:53,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=90, PETRI_PLACES=41, PETRI_TRANSITIONS=19} [2023-08-30 23:18:53,714 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 14 predicate places. [2023-08-30 23:18:53,715 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 19 transitions, 90 flow [2023-08-30 23:18:53,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 0 states have call successors, (0), 0 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 23:18:53,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:18:53,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:18:53,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 23:18:53,715 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:18:53,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:18:53,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1386471717, now seen corresponding path program 1 times [2023-08-30 23:18:53,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:18:53,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842077585] [2023-08-30 23:18:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:18:53,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:18:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:18:53,839 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 23:18:53,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:18:53,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842077585] [2023-08-30 23:18:53,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842077585] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:18:53,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:18:53,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:18:53,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958094413] [2023-08-30 23:18:53,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:18:53,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 23:18:53,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:18:53,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 23:18:53,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 23:18:53,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 141 [2023-08-30 23:18:53,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 19 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 76.4) internal successors, (382), 5 states have internal predecessors, (382), 0 states have call successors, (0), 0 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 23:18:53,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:18:53,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 141 [2023-08-30 23:18:53,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:18:53,916 INFO L130 PetriNetUnfolder]: 40/98 cut-off events. [2023-08-30 23:18:53,916 INFO L131 PetriNetUnfolder]: For 82/94 co-relation queries the response was YES. [2023-08-30 23:18:53,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 98 events. 40/98 cut-off events. For 82/94 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 292 event pairs, 7 based on Foata normal form. 9/104 useless extension candidates. Maximal degree in co-relation 327. Up to 50 conditions per place. [2023-08-30 23:18:53,917 INFO L137 encePairwiseOnDemand]: 135/141 looper letters, 20 selfloop transitions, 5 changer transitions 13/41 dead transitions. [2023-08-30 23:18:53,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 264 flow [2023-08-30 23:18:53,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 23:18:53,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 23:18:53,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 484 transitions. [2023-08-30 23:18:53,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5721040189125296 [2023-08-30 23:18:53,919 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 484 transitions. [2023-08-30 23:18:53,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 484 transitions. [2023-08-30 23:18:53,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:18:53,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 484 transitions. [2023-08-30 23:18:53,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.66666666666667) internal successors, (484), 6 states have internal predecessors, (484), 0 states have call successors, (0), 0 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 23:18:53,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 141.0) internal successors, (987), 7 states have internal predecessors, (987), 0 states have call successors, (0), 0 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 23:18:53,922 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 141.0) internal successors, (987), 7 states have internal predecessors, (987), 0 states have call successors, (0), 0 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 23:18:53,922 INFO L175 Difference]: Start difference. First operand has 41 places, 19 transitions, 90 flow. Second operand 6 states and 484 transitions. [2023-08-30 23:18:53,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 264 flow [2023-08-30 23:18:53,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 259 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 23:18:53,924 INFO L231 Difference]: Finished difference. Result has 45 places, 19 transitions, 109 flow [2023-08-30 23:18:53,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=109, PETRI_PLACES=45, PETRI_TRANSITIONS=19} [2023-08-30 23:18:53,924 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 18 predicate places. [2023-08-30 23:18:53,925 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 19 transitions, 109 flow [2023-08-30 23:18:53,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.4) internal successors, (382), 5 states have internal predecessors, (382), 0 states have call successors, (0), 0 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 23:18:53,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:18:53,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:18:53,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 23:18:53,925 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:18:53,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:18:53,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1424355267, now seen corresponding path program 1 times [2023-08-30 23:18:53,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:18:53,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770009910] [2023-08-30 23:18:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:18:53,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:18:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:18:54,066 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 23:18:54,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:18:54,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770009910] [2023-08-30 23:18:54,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770009910] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:18:54,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:18:54,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 23:18:54,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613276843] [2023-08-30 23:18:54,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:18:54,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 23:18:54,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:18:54,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 23:18:54,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 23:18:54,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 141 [2023-08-30 23:18:54,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 19 transitions, 109 flow. Second operand has 6 states, 6 states have (on average 76.16666666666667) internal successors, (457), 6 states have internal predecessors, (457), 0 states have call successors, (0), 0 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 23:18:54,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:18:54,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 141 [2023-08-30 23:18:54,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:18:54,131 INFO L130 PetriNetUnfolder]: 27/69 cut-off events. [2023-08-30 23:18:54,132 INFO L131 PetriNetUnfolder]: For 134/148 co-relation queries the response was YES. [2023-08-30 23:18:54,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 69 events. 27/69 cut-off events. For 134/148 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 169 event pairs, 6 based on Foata normal form. 8/75 useless extension candidates. Maximal degree in co-relation 249. Up to 27 conditions per place. [2023-08-30 23:18:54,132 INFO L137 encePairwiseOnDemand]: 135/141 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2023-08-30 23:18:54,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 30 transitions, 200 flow [2023-08-30 23:18:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 23:18:54,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 23:18:54,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 546 transitions. [2023-08-30 23:18:54,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2023-08-30 23:18:54,135 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 546 transitions. [2023-08-30 23:18:54,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 546 transitions. [2023-08-30 23:18:54,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:18:54,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 546 transitions. [2023-08-30 23:18:54,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 0 states have call successors, (0), 0 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 23:18:54,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 141.0) internal successors, (1128), 8 states have internal predecessors, (1128), 0 states have call successors, (0), 0 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 23:18:54,140 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 141.0) internal successors, (1128), 8 states have internal predecessors, (1128), 0 states have call successors, (0), 0 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 23:18:54,140 INFO L175 Difference]: Start difference. First operand has 45 places, 19 transitions, 109 flow. Second operand 7 states and 546 transitions. [2023-08-30 23:18:54,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 30 transitions, 200 flow [2023-08-30 23:18:54,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 30 transitions, 170 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-08-30 23:18:54,141 INFO L231 Difference]: Finished difference. Result has 42 places, 0 transitions, 0 flow [2023-08-30 23:18:54,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=42, PETRI_TRANSITIONS=0} [2023-08-30 23:18:54,143 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 15 predicate places. [2023-08-30 23:18:54,143 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 0 transitions, 0 flow [2023-08-30 23:18:54,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 76.16666666666667) internal successors, (457), 6 states have internal predecessors, (457), 0 states have call successors, (0), 0 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 23:18:54,146 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-30 23:18:54,147 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-30 23:18:54,147 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-30 23:18:54,147 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-30 23:18:54,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 23:18:54,147 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:18:54,150 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 23:18:54,150 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 23:18:54,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 11:18:54 BasicIcfg [2023-08-30 23:18:54,155 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 23:18:54,156 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 23:18:54,156 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 23:18:54,156 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 23:18:54,157 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:18:48" (3/4) ... [2023-08-30 23:18:54,160 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-30 23:18:54,165 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2023-08-30 23:18:54,165 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2023-08-30 23:18:54,165 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2023-08-30 23:18:54,170 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-08-30 23:18:54,170 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-08-30 23:18:54,171 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-08-30 23:18:54,171 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-08-30 23:18:54,198 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 23:18:54,198 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 23:18:54,198 INFO L158 Benchmark]: Toolchain (without parser) took 6372.04ms. Allocated memory was 86.0MB in the beginning and 151.0MB in the end (delta: 65.0MB). Free memory was 62.5MB in the beginning and 68.2MB in the end (delta: -5.7MB). Peak memory consumption was 62.0MB. Max. memory is 16.1GB. [2023-08-30 23:18:54,199 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 65.0MB. Free memory is still 42.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 23:18:54,199 INFO L158 Benchmark]: CACSL2BoogieTranslator took 396.25ms. Allocated memory is still 86.0MB. Free memory was 62.5MB in the beginning and 62.0MB in the end (delta: 560.1kB). Peak memory consumption was 22.3MB. Max. memory is 16.1GB. [2023-08-30 23:18:54,199 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.28ms. Allocated memory is still 86.0MB. Free memory was 62.0MB in the beginning and 59.9MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 23:18:54,200 INFO L158 Benchmark]: Boogie Preprocessor took 47.63ms. Allocated memory is still 86.0MB. Free memory was 59.9MB in the beginning and 58.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 23:18:54,200 INFO L158 Benchmark]: RCFGBuilder took 445.15ms. Allocated memory is still 86.0MB. Free memory was 58.2MB in the beginning and 44.7MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-08-30 23:18:54,200 INFO L158 Benchmark]: TraceAbstraction took 5375.03ms. Allocated memory was 86.0MB in the beginning and 151.0MB in the end (delta: 65.0MB). Free memory was 44.3MB in the beginning and 71.3MB in the end (delta: -27.0MB). Peak memory consumption was 39.7MB. Max. memory is 16.1GB. [2023-08-30 23:18:54,200 INFO L158 Benchmark]: Witness Printer took 42.07ms. Allocated memory is still 151.0MB. Free memory was 71.3MB in the beginning and 68.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-30 23:18:54,202 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 65.0MB. Free memory is still 42.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 396.25ms. Allocated memory is still 86.0MB. Free memory was 62.5MB in the beginning and 62.0MB in the end (delta: 560.1kB). Peak memory consumption was 22.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.28ms. Allocated memory is still 86.0MB. Free memory was 62.0MB in the beginning and 59.9MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 47.63ms. Allocated memory is still 86.0MB. Free memory was 59.9MB in the beginning and 58.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 445.15ms. Allocated memory is still 86.0MB. Free memory was 58.2MB in the beginning and 44.7MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 5375.03ms. Allocated memory was 86.0MB in the beginning and 151.0MB in the end (delta: 65.0MB). Free memory was 44.3MB in the beginning and 71.3MB in the end (delta: -27.0MB). Peak memory consumption was 39.7MB. Max. memory is 16.1GB. * Witness Printer took 42.07ms. Allocated memory is still 151.0MB. Free memory was 71.3MB in the beginning and 68.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 79 PlacesBefore, 27 PlacesAfterwards, 70 TransitionsBefore, 17 TransitionsAfterwards, 1044 CoEnabledTransitionPairs, 5 FixpointIterations, 20 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 3 ConcurrentYvCompositions, 1 ChoiceCompositions, 56 TotalNumberOfCompositions, 1927 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1249, independent: 1172, independent conditional: 0, independent unconditional: 1172, dependent: 77, dependent conditional: 0, dependent unconditional: 77, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 578, independent: 554, independent conditional: 0, independent unconditional: 554, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1249, independent: 618, independent conditional: 0, independent unconditional: 618, dependent: 53, dependent conditional: 0, dependent unconditional: 53, unknown: 578, unknown conditional: 0, unknown unconditional: 578] , Statistics on independence cache: Total cache size (in pairs): 50, Positive cache size: 43, Positive conditional cache size: 0, Positive unconditional cache size: 43, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 108 locations, 4 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: 5.2s, OverallIterations: 10, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 334 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 239 mSDsluCounter, 125 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 68 mSDsCounter, 56 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 560 IncrementalHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 56 mSolverCounterUnsat, 57 mSDtfsCounter, 560 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=231occurred in iteration=6, InterpolantAutomatonStates: 49, 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 103 ConstructedInterpolants, 0 QuantifiedInterpolants, 439 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-30 23:18:54,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE