./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/triangular-longer-1.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 1e30b67a045ce6921ac9aa6cdcebddb50c3d7d787a6b9dd7b66c9173f916fde4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:39:45,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:39:45,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:39:45,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:39:45,884 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:39:45,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:39:45,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:39:45,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:39:45,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:39:45,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:39:45,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:39:45,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:39:45,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:39:45,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:39:45,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:39:45,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:39:45,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:39:45,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:39:45,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:39:45,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:39:45,913 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:39:45,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:39:45,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:39:45,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:39:45,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:39:45,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:39:45,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:39:45,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:39:45,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:39:45,925 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:39:45,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:39:45,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:39:45,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:39:45,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:39:45,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:39:45,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:39:45,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:39:45,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:39:45,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:39:45,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:39:45,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:39:45,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:39:45,933 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:39:45,956 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:39:45,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:39:45,956 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:39:45,956 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:39:45,957 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:39:45,957 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:39:45,957 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:39:45,957 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:39:45,957 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:39:45,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:39:45,958 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:39:45,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:39:45,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:39:45,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:39:45,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:39:45,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:39:45,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:39:45,959 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:39:45,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:39:45,959 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:39:45,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:39:45,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:39:45,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:39:45,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:39:45,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:39:45,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:39:45,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:39:45,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:39:45,961 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:39:45,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:39:45,961 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:39:45,961 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:39:45,961 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:39:45,962 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e30b67a045ce6921ac9aa6cdcebddb50c3d7d787a6b9dd7b66c9173f916fde4 [2022-07-13 21:39:46,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:39:46,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:39:46,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:39:46,188 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:39:46,189 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:39:46,190 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longer-1.i [2022-07-13 21:39:46,248 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/014f17f7a/aa733bd92bd24b88a8bba2b091f1d6a6/FLAGcc742f3e2 [2022-07-13 21:39:46,674 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:39:46,676 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-1.i [2022-07-13 21:39:46,694 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/014f17f7a/aa733bd92bd24b88a8bba2b091f1d6a6/FLAGcc742f3e2 [2022-07-13 21:39:47,042 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/014f17f7a/aa733bd92bd24b88a8bba2b091f1d6a6 [2022-07-13 21:39:47,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:39:47,047 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:39:47,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:39:47,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:39:47,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:39:47,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:39:47" (1/1) ... [2022-07-13 21:39:47,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1969841c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:47, skipping insertion in model container [2022-07-13 21:39:47,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:39:47" (1/1) ... [2022-07-13 21:39:47,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:39:47,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:39:47,368 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-1.i[30961,30974] [2022-07-13 21:39:47,371 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:39:47,378 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:39:47,423 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-1.i[30961,30974] [2022-07-13 21:39:47,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:39:47,456 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:39:47,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:47 WrapperNode [2022-07-13 21:39:47,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:39:47,457 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:39:47,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:39:47,457 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:39:47,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:47" (1/1) ... [2022-07-13 21:39:47,487 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:47" (1/1) ... [2022-07-13 21:39:47,502 INFO L137 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-07-13 21:39:47,502 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:39:47,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:39:47,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:39:47,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:39:47,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:47" (1/1) ... [2022-07-13 21:39:47,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:47" (1/1) ... [2022-07-13 21:39:47,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:47" (1/1) ... [2022-07-13 21:39:47,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:47" (1/1) ... [2022-07-13 21:39:47,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:47" (1/1) ... [2022-07-13 21:39:47,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:47" (1/1) ... [2022-07-13 21:39:47,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:47" (1/1) ... [2022-07-13 21:39:47,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:39:47,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:39:47,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:39:47,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:39:47,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:47" (1/1) ... [2022-07-13 21:39:47,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:39:47,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:47,576 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 21:39:47,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 21:39:47,625 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-07-13 21:39:47,625 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-07-13 21:39:47,625 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-07-13 21:39:47,626 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-07-13 21:39:47,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:39:47,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 21:39:47,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:39:47,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:39:47,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:39:47,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:39:47,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 21:39:47,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:39:47,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:39:47,628 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:39:47,773 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:39:47,788 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:39:47,917 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:39:47,923 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:39:47,923 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 21:39:47,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:39:47 BoogieIcfgContainer [2022-07-13 21:39:47,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:39:47,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:39:47,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:39:47,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:39:47,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:39:47" (1/3) ... [2022-07-13 21:39:47,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b21f3d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:39:47, skipping insertion in model container [2022-07-13 21:39:47,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:39:47" (2/3) ... [2022-07-13 21:39:47,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b21f3d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:39:47, skipping insertion in model container [2022-07-13 21:39:47,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:39:47" (3/3) ... [2022-07-13 21:39:47,933 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2022-07-13 21:39:47,937 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:39:47,944 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:39:47,944 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 21:39:47,944 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:39:47,980 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:39:48,007 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 150 flow [2022-07-13 21:39:48,036 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2022-07-13 21:39:48,037 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:39:48,040 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 68 events. 5/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2022-07-13 21:39:48,041 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 150 flow [2022-07-13 21:39:48,044 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 142 flow [2022-07-13 21:39:48,052 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:39:48,058 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5d84f3a6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1367d63c [2022-07-13 21:39:48,058 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 21:39:48,073 INFO L129 PetriNetUnfolder]: 4/58 cut-off events. [2022-07-13 21:39:48,073 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:39:48,073 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:48,074 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:48,074 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:48,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:48,078 INFO L85 PathProgramCache]: Analyzing trace with hash 398220865, now seen corresponding path program 1 times [2022-07-13 21:39:48,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:48,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661073268] [2022-07-13 21:39:48,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:48,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:48,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:48,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661073268] [2022-07-13 21:39:48,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661073268] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:48,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:48,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:39:48,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206559569] [2022-07-13 21:39:48,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:48,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:39:48,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:48,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:39:48,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:39:48,589 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:48,595 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:48,595 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:48,596 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:48,597 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:48,777 INFO L129 PetriNetUnfolder]: 42/203 cut-off events. [2022-07-13 21:39:48,779 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-13 21:39:48,781 INFO L84 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 203 events. 42/203 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 761 event pairs, 3 based on Foata normal form. 45/231 useless extension candidates. Maximal degree in co-relation 250. Up to 28 conditions per place. [2022-07-13 21:39:48,784 INFO L132 encePairwiseOnDemand]: 59/70 looper letters, 22 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2022-07-13 21:39:48,785 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 271 flow [2022-07-13 21:39:48,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 21:39:48,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-13 21:39:48,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 613 transitions. [2022-07-13 21:39:48,799 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8757142857142857 [2022-07-13 21:39:48,799 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 613 transitions. [2022-07-13 21:39:48,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 613 transitions. [2022-07-13 21:39:48,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:48,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 613 transitions. [2022-07-13 21:39:48,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.3) internal successors, (613), 10 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:48,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:48,821 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:48,822 INFO L186 Difference]: Start difference. First operand has 70 places, 68 transitions, 142 flow. Second operand 10 states and 613 transitions. [2022-07-13 21:39:48,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 271 flow [2022-07-13 21:39:48,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 21:39:48,829 INFO L242 Difference]: Finished difference. Result has 85 places, 85 transitions, 276 flow [2022-07-13 21:39:48,830 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2022-07-13 21:39:48,835 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2022-07-13 21:39:48,836 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 276 flow [2022-07-13 21:39:48,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:48,837 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:48,837 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:48,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:39:48,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:48,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:48,840 INFO L85 PathProgramCache]: Analyzing trace with hash 245149124, now seen corresponding path program 1 times [2022-07-13 21:39:48,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:48,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913159155] [2022-07-13 21:39:48,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:48,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:49,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:49,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913159155] [2022-07-13 21:39:49,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913159155] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:49,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:49,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:39:49,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478455260] [2022-07-13 21:39:49,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:49,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:39:49,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:49,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:39:49,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:39:49,021 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:49,022 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,022 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:49,022 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:49,022 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:49,191 INFO L129 PetriNetUnfolder]: 46/219 cut-off events. [2022-07-13 21:39:49,191 INFO L130 PetriNetUnfolder]: For 117/122 co-relation queries the response was YES. [2022-07-13 21:39:49,194 INFO L84 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 219 events. 46/219 cut-off events. For 117/122 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 854 event pairs, 0 based on Foata normal form. 3/207 useless extension candidates. Maximal degree in co-relation 378. Up to 35 conditions per place. [2022-07-13 21:39:49,195 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 16 selfloop transitions, 9 changer transitions 40/110 dead transitions. [2022-07-13 21:39:49,196 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 110 transitions, 508 flow [2022-07-13 21:39:49,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 21:39:49,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 21:39:49,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 475 transitions. [2022-07-13 21:39:49,198 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8482142857142857 [2022-07-13 21:39:49,199 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 475 transitions. [2022-07-13 21:39:49,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 475 transitions. [2022-07-13 21:39:49,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:49,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 475 transitions. [2022-07-13 21:39:49,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 59.375) internal successors, (475), 8 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,204 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,204 INFO L186 Difference]: Start difference. First operand has 85 places, 85 transitions, 276 flow. Second operand 8 states and 475 transitions. [2022-07-13 21:39:49,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 110 transitions, 508 flow [2022-07-13 21:39:49,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:39:49,212 INFO L242 Difference]: Finished difference. Result has 96 places, 67 transitions, 237 flow [2022-07-13 21:39:49,213 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=237, PETRI_PLACES=96, PETRI_TRANSITIONS=67} [2022-07-13 21:39:49,213 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2022-07-13 21:39:49,214 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 67 transitions, 237 flow [2022-07-13 21:39:49,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,214 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:49,214 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:49,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:39:49,215 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:49,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:49,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1444168350, now seen corresponding path program 1 times [2022-07-13 21:39:49,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:49,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002871015] [2022-07-13 21:39:49,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:49,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:49,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:49,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:49,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002871015] [2022-07-13 21:39:49,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002871015] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:49,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:49,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:39:49,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231379854] [2022-07-13 21:39:49,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:49,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:39:49,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:49,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:39:49,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:39:49,299 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:49,300 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 67 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,300 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:49,300 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:49,300 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:49,388 INFO L129 PetriNetUnfolder]: 37/188 cut-off events. [2022-07-13 21:39:49,389 INFO L130 PetriNetUnfolder]: For 256/265 co-relation queries the response was YES. [2022-07-13 21:39:49,390 INFO L84 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 188 events. 37/188 cut-off events. For 256/265 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 594 event pairs, 0 based on Foata normal form. 12/182 useless extension candidates. Maximal degree in co-relation 354. Up to 35 conditions per place. [2022-07-13 21:39:49,391 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 23 selfloop transitions, 11 changer transitions 8/87 dead transitions. [2022-07-13 21:39:49,391 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 457 flow [2022-07-13 21:39:49,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:39:49,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:39:49,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2022-07-13 21:39:49,393 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2022-07-13 21:39:49,394 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2022-07-13 21:39:49,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2022-07-13 21:39:49,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:49,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2022-07-13 21:39:49,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,398 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,398 INFO L186 Difference]: Start difference. First operand has 96 places, 67 transitions, 237 flow. Second operand 9 states and 530 transitions. [2022-07-13 21:39:49,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 457 flow [2022-07-13 21:39:49,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 387 flow, removed 25 selfloop flow, removed 9 redundant places. [2022-07-13 21:39:49,406 INFO L242 Difference]: Finished difference. Result has 86 places, 72 transitions, 289 flow [2022-07-13 21:39:49,407 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=289, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2022-07-13 21:39:49,408 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2022-07-13 21:39:49,409 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 289 flow [2022-07-13 21:39:49,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,409 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:49,409 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:49,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:39:49,410 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:49,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:49,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1245653052, now seen corresponding path program 2 times [2022-07-13 21:39:49,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:49,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199390608] [2022-07-13 21:39:49,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:49,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:49,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:49,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:49,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199390608] [2022-07-13 21:39:49,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199390608] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:49,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:49,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:39:49,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305778363] [2022-07-13 21:39:49,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:49,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:39:49,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:49,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:39:49,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:39:49,505 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:49,505 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,505 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:49,506 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:49,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:49,603 INFO L129 PetriNetUnfolder]: 30/184 cut-off events. [2022-07-13 21:39:49,604 INFO L130 PetriNetUnfolder]: For 240/261 co-relation queries the response was YES. [2022-07-13 21:39:49,604 INFO L84 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 184 events. 30/184 cut-off events. For 240/261 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 615 event pairs, 0 based on Foata normal form. 18/184 useless extension candidates. Maximal degree in co-relation 372. Up to 32 conditions per place. [2022-07-13 21:39:49,605 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 19 selfloop transitions, 12 changer transitions 11/87 dead transitions. [2022-07-13 21:39:49,605 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 87 transitions, 487 flow [2022-07-13 21:39:49,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:39:49,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:39:49,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 524 transitions. [2022-07-13 21:39:49,608 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2022-07-13 21:39:49,608 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 524 transitions. [2022-07-13 21:39:49,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 524 transitions. [2022-07-13 21:39:49,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:49,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 524 transitions. [2022-07-13 21:39:49,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,611 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,611 INFO L186 Difference]: Start difference. First operand has 86 places, 72 transitions, 289 flow. Second operand 9 states and 524 transitions. [2022-07-13 21:39:49,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 87 transitions, 487 flow [2022-07-13 21:39:49,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 467 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-07-13 21:39:49,615 INFO L242 Difference]: Finished difference. Result has 93 places, 73 transitions, 332 flow [2022-07-13 21:39:49,615 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=332, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2022-07-13 21:39:49,616 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 23 predicate places. [2022-07-13 21:39:49,616 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 332 flow [2022-07-13 21:39:49,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,617 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:49,617 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:49,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:39:49,617 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:49,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:49,618 INFO L85 PathProgramCache]: Analyzing trace with hash 506405013, now seen corresponding path program 1 times [2022-07-13 21:39:49,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:49,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437748329] [2022-07-13 21:39:49,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:49,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:49,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:49,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437748329] [2022-07-13 21:39:49,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437748329] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:49,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:49,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:39:49,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086039952] [2022-07-13 21:39:49,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:49,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:39:49,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:49,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:39:49,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:39:49,707 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:49,707 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 332 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,708 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:49,708 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:49,708 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:49,836 INFO L129 PetriNetUnfolder]: 43/234 cut-off events. [2022-07-13 21:39:49,837 INFO L130 PetriNetUnfolder]: For 614/638 co-relation queries the response was YES. [2022-07-13 21:39:49,838 INFO L84 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 234 events. 43/234 cut-off events. For 614/638 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 848 event pairs, 1 based on Foata normal form. 17/229 useless extension candidates. Maximal degree in co-relation 535. Up to 50 conditions per place. [2022-07-13 21:39:49,839 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 23 selfloop transitions, 21 changer transitions 8/97 dead transitions. [2022-07-13 21:39:49,840 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 97 transitions, 660 flow [2022-07-13 21:39:49,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 21:39:49,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-13 21:39:49,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 644 transitions. [2022-07-13 21:39:49,842 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8363636363636363 [2022-07-13 21:39:49,842 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 644 transitions. [2022-07-13 21:39:49,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 644 transitions. [2022-07-13 21:39:49,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:49,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 644 transitions. [2022-07-13 21:39:49,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.54545454545455) internal successors, (644), 11 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,846 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,846 INFO L186 Difference]: Start difference. First operand has 93 places, 73 transitions, 332 flow. Second operand 11 states and 644 transitions. [2022-07-13 21:39:49,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 97 transitions, 660 flow [2022-07-13 21:39:49,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 97 transitions, 544 flow, removed 45 selfloop flow, removed 10 redundant places. [2022-07-13 21:39:49,852 INFO L242 Difference]: Finished difference. Result has 97 places, 79 transitions, 417 flow [2022-07-13 21:39:49,852 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=417, PETRI_PLACES=97, PETRI_TRANSITIONS=79} [2022-07-13 21:39:49,853 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 27 predicate places. [2022-07-13 21:39:49,853 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 79 transitions, 417 flow [2022-07-13 21:39:49,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,853 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:49,853 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:49,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:39:49,854 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:49,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:49,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1283973881, now seen corresponding path program 2 times [2022-07-13 21:39:49,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:49,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222691793] [2022-07-13 21:39:49,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:49,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:49,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:49,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222691793] [2022-07-13 21:39:49,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222691793] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:49,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:49,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:39:49,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4380433] [2022-07-13 21:39:49,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:49,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:39:49,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:49,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:39:49,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:39:49,927 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:49,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 79 transitions, 417 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:49,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:49,928 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:49,928 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:50,057 INFO L129 PetriNetUnfolder]: 36/209 cut-off events. [2022-07-13 21:39:50,058 INFO L130 PetriNetUnfolder]: For 784/821 co-relation queries the response was YES. [2022-07-13 21:39:50,059 INFO L84 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 209 events. 36/209 cut-off events. For 784/821 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 724 event pairs, 1 based on Foata normal form. 27/217 useless extension candidates. Maximal degree in co-relation 551. Up to 44 conditions per place. [2022-07-13 21:39:50,060 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 20 selfloop transitions, 21 changer transitions 11/97 dead transitions. [2022-07-13 21:39:50,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 97 transitions, 749 flow [2022-07-13 21:39:50,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 21:39:50,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-13 21:39:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 638 transitions. [2022-07-13 21:39:50,062 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-07-13 21:39:50,062 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 638 transitions. [2022-07-13 21:39:50,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 638 transitions. [2022-07-13 21:39:50,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:50,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 638 transitions. [2022-07-13 21:39:50,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:50,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:50,067 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:50,067 INFO L186 Difference]: Start difference. First operand has 97 places, 79 transitions, 417 flow. Second operand 11 states and 638 transitions. [2022-07-13 21:39:50,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 97 transitions, 749 flow [2022-07-13 21:39:50,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 97 transitions, 693 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-07-13 21:39:50,073 INFO L242 Difference]: Finished difference. Result has 104 places, 80 transitions, 470 flow [2022-07-13 21:39:50,073 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=470, PETRI_PLACES=104, PETRI_TRANSITIONS=80} [2022-07-13 21:39:50,075 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 34 predicate places. [2022-07-13 21:39:50,075 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 80 transitions, 470 flow [2022-07-13 21:39:50,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:50,076 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:50,076 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:50,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:39:50,076 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:50,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:50,077 INFO L85 PathProgramCache]: Analyzing trace with hash -949175033, now seen corresponding path program 3 times [2022-07-13 21:39:50,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:50,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855448284] [2022-07-13 21:39:50,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:50,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:50,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:50,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855448284] [2022-07-13 21:39:50,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855448284] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:39:50,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:39:50,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:39:50,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152593016] [2022-07-13 21:39:50,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:39:50,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:39:50,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:50,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:39:50,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:39:50,186 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:50,188 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 80 transitions, 470 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:50,188 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:50,188 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:50,188 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:50,332 INFO L129 PetriNetUnfolder]: 35/201 cut-off events. [2022-07-13 21:39:50,333 INFO L130 PetriNetUnfolder]: For 899/928 co-relation queries the response was YES. [2022-07-13 21:39:50,334 INFO L84 FinitePrefix]: Finished finitePrefix Result has 604 conditions, 201 events. 35/201 cut-off events. For 899/928 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 722 event pairs, 0 based on Foata normal form. 23/207 useless extension candidates. Maximal degree in co-relation 556. Up to 42 conditions per place. [2022-07-13 21:39:50,335 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 25 selfloop transitions, 17 changer transitions 5/92 dead transitions. [2022-07-13 21:39:50,335 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 92 transitions, 718 flow [2022-07-13 21:39:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 21:39:50,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-13 21:39:50,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 695 transitions. [2022-07-13 21:39:50,337 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8273809523809523 [2022-07-13 21:39:50,338 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 695 transitions. [2022-07-13 21:39:50,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 695 transitions. [2022-07-13 21:39:50,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:50,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 695 transitions. [2022-07-13 21:39:50,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:50,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:50,342 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:50,342 INFO L186 Difference]: Start difference. First operand has 104 places, 80 transitions, 470 flow. Second operand 12 states and 695 transitions. [2022-07-13 21:39:50,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 92 transitions, 718 flow [2022-07-13 21:39:50,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 92 transitions, 644 flow, removed 19 selfloop flow, removed 9 redundant places. [2022-07-13 21:39:50,350 INFO L242 Difference]: Finished difference. Result has 107 places, 83 transitions, 503 flow [2022-07-13 21:39:50,350 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=503, PETRI_PLACES=107, PETRI_TRANSITIONS=83} [2022-07-13 21:39:50,350 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 37 predicate places. [2022-07-13 21:39:50,351 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 83 transitions, 503 flow [2022-07-13 21:39:50,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:50,351 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:50,352 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:50,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:39:50,352 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:50,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:50,352 INFO L85 PathProgramCache]: Analyzing trace with hash 270829877, now seen corresponding path program 1 times [2022-07-13 21:39:50,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:50,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35364688] [2022-07-13 21:39:50,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:50,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:50,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:50,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35364688] [2022-07-13 21:39:50,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35364688] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:39:50,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520155840] [2022-07-13 21:39:50,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:50,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:50,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:50,435 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:39:50,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:39:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:50,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 21:39:50,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:39:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:50,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:39:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:50,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520155840] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:39:50,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:39:50,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-07-13 21:39:50,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559968751] [2022-07-13 21:39:50,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:39:50,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 21:39:50,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:50,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 21:39:50,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-07-13 21:39:50,792 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:50,793 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 83 transitions, 503 flow. Second operand has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:50,793 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:50,793 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:50,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:51,133 INFO L129 PetriNetUnfolder]: 53/299 cut-off events. [2022-07-13 21:39:51,133 INFO L130 PetriNetUnfolder]: For 1219/1259 co-relation queries the response was YES. [2022-07-13 21:39:51,135 INFO L84 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 299 events. 53/299 cut-off events. For 1219/1259 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1142 event pairs, 1 based on Foata normal form. 28/298 useless extension candidates. Maximal degree in co-relation 843. Up to 64 conditions per place. [2022-07-13 21:39:51,136 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 27 selfloop transitions, 36 changer transitions 14/122 dead transitions. [2022-07-13 21:39:51,136 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 122 transitions, 1187 flow [2022-07-13 21:39:51,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 21:39:51,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-13 21:39:51,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1159 transitions. [2022-07-13 21:39:51,140 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8278571428571428 [2022-07-13 21:39:51,140 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1159 transitions. [2022-07-13 21:39:51,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1159 transitions. [2022-07-13 21:39:51,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:51,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1159 transitions. [2022-07-13 21:39:51,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.95) internal successors, (1159), 20 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:51,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:51,146 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:51,146 INFO L186 Difference]: Start difference. First operand has 107 places, 83 transitions, 503 flow. Second operand 20 states and 1159 transitions. [2022-07-13 21:39:51,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 122 transitions, 1187 flow [2022-07-13 21:39:51,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 122 transitions, 1151 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-07-13 21:39:51,153 INFO L242 Difference]: Finished difference. Result has 127 places, 99 transitions, 828 flow [2022-07-13 21:39:51,154 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=828, PETRI_PLACES=127, PETRI_TRANSITIONS=99} [2022-07-13 21:39:51,154 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 57 predicate places. [2022-07-13 21:39:51,154 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 99 transitions, 828 flow [2022-07-13 21:39:51,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:51,155 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:51,155 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:51,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 21:39:51,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:51,372 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:51,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:51,372 INFO L85 PathProgramCache]: Analyzing trace with hash -2022110288, now seen corresponding path program 1 times [2022-07-13 21:39:51,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:51,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645122905] [2022-07-13 21:39:51,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:51,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:39:51,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:51,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645122905] [2022-07-13 21:39:51,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645122905] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:39:51,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352955641] [2022-07-13 21:39:51,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:51,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:51,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:51,498 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:39:51,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:39:51,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:51,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 21:39:51,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:39:51,701 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:39:51,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:39:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:39:51,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352955641] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:39:51,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:39:51,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-07-13 21:39:51,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622849795] [2022-07-13 21:39:51,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:39:51,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 21:39:51,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:51,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 21:39:51,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-07-13 21:39:51,949 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:51,950 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 99 transitions, 828 flow. Second operand has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:51,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:51,950 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:51,950 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:52,325 INFO L129 PetriNetUnfolder]: 75/452 cut-off events. [2022-07-13 21:39:52,326 INFO L130 PetriNetUnfolder]: For 3341/3397 co-relation queries the response was YES. [2022-07-13 21:39:52,329 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1569 conditions, 452 events. 75/452 cut-off events. For 3341/3397 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1812 event pairs, 0 based on Foata normal form. 31/437 useless extension candidates. Maximal degree in co-relation 1506. Up to 100 conditions per place. [2022-07-13 21:39:52,331 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 58 selfloop transitions, 25 changer transitions 26/154 dead transitions. [2022-07-13 21:39:52,331 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 154 transitions, 2060 flow [2022-07-13 21:39:52,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 21:39:52,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-13 21:39:52,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1450 transitions. [2022-07-13 21:39:52,335 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-07-13 21:39:52,335 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1450 transitions. [2022-07-13 21:39:52,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1450 transitions. [2022-07-13 21:39:52,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:52,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1450 transitions. [2022-07-13 21:39:52,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 58.0) internal successors, (1450), 25 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:52,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:52,343 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:52,344 INFO L186 Difference]: Start difference. First operand has 127 places, 99 transitions, 828 flow. Second operand 25 states and 1450 transitions. [2022-07-13 21:39:52,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 154 transitions, 2060 flow [2022-07-13 21:39:52,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 154 transitions, 1647 flow, removed 189 selfloop flow, removed 12 redundant places. [2022-07-13 21:39:52,356 INFO L242 Difference]: Finished difference. Result has 153 places, 113 transitions, 955 flow [2022-07-13 21:39:52,356 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=955, PETRI_PLACES=153, PETRI_TRANSITIONS=113} [2022-07-13 21:39:52,357 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 83 predicate places. [2022-07-13 21:39:52,357 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 113 transitions, 955 flow [2022-07-13 21:39:52,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:52,358 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:52,358 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:52,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 21:39:52,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-13 21:39:52,572 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:52,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:52,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1596067542, now seen corresponding path program 2 times [2022-07-13 21:39:52,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:52,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701423666] [2022-07-13 21:39:52,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:52,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:39:52,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:52,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701423666] [2022-07-13 21:39:52,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701423666] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:39:52,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406008782] [2022-07-13 21:39:52,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:39:52,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:52,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:52,683 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:39:52,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 21:39:52,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:39:52,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:39:52,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 21:39:52,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:39:52,876 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:39:52,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:39:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:39:53,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406008782] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:39:53,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:39:53,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-07-13 21:39:53,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602765493] [2022-07-13 21:39:53,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:39:53,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:39:53,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:53,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:39:53,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:39:53,079 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:53,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 113 transitions, 955 flow. Second operand has 18 states, 18 states have (on average 56.666666666666664) internal successors, (1020), 18 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:53,080 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:53,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:53,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:53,617 INFO L129 PetriNetUnfolder]: 113/712 cut-off events. [2022-07-13 21:39:53,618 INFO L130 PetriNetUnfolder]: For 12122/12272 co-relation queries the response was YES. [2022-07-13 21:39:53,622 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2934 conditions, 712 events. 113/712 cut-off events. For 12122/12272 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4178 event pairs, 0 based on Foata normal form. 31/671 useless extension candidates. Maximal degree in co-relation 2855. Up to 148 conditions per place. [2022-07-13 21:39:53,626 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 59 selfloop transitions, 72 changer transitions 26/202 dead transitions. [2022-07-13 21:39:53,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 202 transitions, 3279 flow [2022-07-13 21:39:53,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-13 21:39:53,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-13 21:39:53,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1851 transitions. [2022-07-13 21:39:53,630 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8263392857142857 [2022-07-13 21:39:53,630 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1851 transitions. [2022-07-13 21:39:53,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1851 transitions. [2022-07-13 21:39:53,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:53,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1851 transitions. [2022-07-13 21:39:53,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.84375) internal successors, (1851), 32 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:53,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 70.0) internal successors, (2310), 33 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:53,638 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 70.0) internal successors, (2310), 33 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:53,638 INFO L186 Difference]: Start difference. First operand has 153 places, 113 transitions, 955 flow. Second operand 32 states and 1851 transitions. [2022-07-13 21:39:53,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 202 transitions, 3279 flow [2022-07-13 21:39:53,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 202 transitions, 2817 flow, removed 223 selfloop flow, removed 13 redundant places. [2022-07-13 21:39:53,668 INFO L242 Difference]: Finished difference. Result has 185 places, 151 transitions, 1736 flow [2022-07-13 21:39:53,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1736, PETRI_PLACES=185, PETRI_TRANSITIONS=151} [2022-07-13 21:39:53,669 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 115 predicate places. [2022-07-13 21:39:53,669 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 151 transitions, 1736 flow [2022-07-13 21:39:53,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.666666666666664) internal successors, (1020), 18 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:53,670 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:53,670 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:53,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 21:39:53,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:53,880 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:53,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:53,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1625159538, now seen corresponding path program 3 times [2022-07-13 21:39:53,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:53,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129454835] [2022-07-13 21:39:53,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:53,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:39:53,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:53,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129454835] [2022-07-13 21:39:53,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129454835] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:39:53,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721273659] [2022-07-13 21:39:53,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 21:39:53,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:53,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:53,972 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:39:54,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 21:39:54,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 21:39:54,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:39:54,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 21:39:54,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:39:54,116 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:39:54,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:39:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:39:54,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721273659] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:39:54,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:39:54,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-07-13 21:39:54,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157380871] [2022-07-13 21:39:54,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:39:54,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:39:54,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:54,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:39:54,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:39:54,262 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:54,263 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 151 transitions, 1736 flow. Second operand has 18 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:54,263 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:54,263 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:54,263 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:55,005 INFO L129 PetriNetUnfolder]: 154/971 cut-off events. [2022-07-13 21:39:55,005 INFO L130 PetriNetUnfolder]: For 31224/31425 co-relation queries the response was YES. [2022-07-13 21:39:55,013 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4884 conditions, 971 events. 154/971 cut-off events. For 31224/31425 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 6448 event pairs, 0 based on Foata normal form. 42/916 useless extension candidates. Maximal degree in co-relation 4789. Up to 198 conditions per place. [2022-07-13 21:39:55,020 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 49 selfloop transitions, 128 changer transitions 26/248 dead transitions. [2022-07-13 21:39:55,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 248 transitions, 5288 flow [2022-07-13 21:39:55,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-13 21:39:55,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-13 21:39:55,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2143 transitions. [2022-07-13 21:39:55,023 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8274131274131274 [2022-07-13 21:39:55,023 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2143 transitions. [2022-07-13 21:39:55,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2143 transitions. [2022-07-13 21:39:55,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:55,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2143 transitions. [2022-07-13 21:39:55,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 57.91891891891892) internal successors, (2143), 37 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:55,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:55,032 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:55,032 INFO L186 Difference]: Start difference. First operand has 185 places, 151 transitions, 1736 flow. Second operand 37 states and 2143 transitions. [2022-07-13 21:39:55,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 248 transitions, 5288 flow [2022-07-13 21:39:55,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 248 transitions, 4514 flow, removed 374 selfloop flow, removed 16 redundant places. [2022-07-13 21:39:55,098 INFO L242 Difference]: Finished difference. Result has 220 places, 193 transitions, 2781 flow [2022-07-13 21:39:55,098 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2781, PETRI_PLACES=220, PETRI_TRANSITIONS=193} [2022-07-13 21:39:55,099 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 150 predicate places. [2022-07-13 21:39:55,099 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 193 transitions, 2781 flow [2022-07-13 21:39:55,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:55,100 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:55,100 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:55,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 21:39:55,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:55,312 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:55,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:55,312 INFO L85 PathProgramCache]: Analyzing trace with hash 532154320, now seen corresponding path program 4 times [2022-07-13 21:39:55,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:55,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280444654] [2022-07-13 21:39:55,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:55,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:55,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:55,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:55,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280444654] [2022-07-13 21:39:55,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280444654] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:39:55,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786335846] [2022-07-13 21:39:55,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 21:39:55,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:55,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:55,428 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:39:55,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 21:39:55,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 21:39:55,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:39:55,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 21:39:55,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:39:55,648 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:55,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:39:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:39:55,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786335846] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:39:55,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:39:55,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2022-07-13 21:39:55,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257215598] [2022-07-13 21:39:55,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:39:55,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 21:39:55,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:55,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 21:39:55,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-07-13 21:39:55,894 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:55,895 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 193 transitions, 2781 flow. Second operand has 25 states, 25 states have (on average 56.32) internal successors, (1408), 25 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:55,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:55,896 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:55,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:57,006 INFO L129 PetriNetUnfolder]: 216/1357 cut-off events. [2022-07-13 21:39:57,007 INFO L130 PetriNetUnfolder]: For 75919/76244 co-relation queries the response was YES. [2022-07-13 21:39:57,018 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8487 conditions, 1357 events. 216/1357 cut-off events. For 75919/76244 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 8854 event pairs, 1 based on Foata normal form. 42/1260 useless extension candidates. Maximal degree in co-relation 8376. Up to 278 conditions per place. [2022-07-13 21:39:57,030 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 62 selfloop transitions, 183 changer transitions 32/322 dead transitions. [2022-07-13 21:39:57,030 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 322 transitions, 9410 flow [2022-07-13 21:39:57,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-13 21:39:57,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-07-13 21:39:57,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2893 transitions. [2022-07-13 21:39:57,034 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8265714285714286 [2022-07-13 21:39:57,035 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2893 transitions. [2022-07-13 21:39:57,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2893 transitions. [2022-07-13 21:39:57,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:57,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2893 transitions. [2022-07-13 21:39:57,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 57.86) internal successors, (2893), 50 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:57,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:57,075 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:57,075 INFO L186 Difference]: Start difference. First operand has 220 places, 193 transitions, 2781 flow. Second operand 50 states and 2893 transitions. [2022-07-13 21:39:57,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 322 transitions, 9410 flow [2022-07-13 21:39:57,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 322 transitions, 6914 flow, removed 1224 selfloop flow, removed 20 redundant places. [2022-07-13 21:39:57,199 INFO L242 Difference]: Finished difference. Result has 271 places, 254 transitions, 4105 flow [2022-07-13 21:39:57,199 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2187, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=4105, PETRI_PLACES=271, PETRI_TRANSITIONS=254} [2022-07-13 21:39:57,200 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 201 predicate places. [2022-07-13 21:39:57,200 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 254 transitions, 4105 flow [2022-07-13 21:39:57,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.32) internal successors, (1408), 25 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:57,201 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:57,201 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:57,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 21:39:57,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-13 21:39:57,416 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:57,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:57,416 INFO L85 PathProgramCache]: Analyzing trace with hash -795606192, now seen corresponding path program 5 times [2022-07-13 21:39:57,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:57,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635291512] [2022-07-13 21:39:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:57,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:39:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:39:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:39:57,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:39:57,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635291512] [2022-07-13 21:39:57,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635291512] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:39:57,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090582656] [2022-07-13 21:39:57,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 21:39:57,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:57,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:39:57,728 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:39:57,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 21:39:57,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-13 21:39:57,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:39:57,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 21:39:57,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:39:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:39:58,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:39:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:39:58,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090582656] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:39:58,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:39:58,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 29 [2022-07-13 21:39:58,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812693908] [2022-07-13 21:39:58,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:39:58,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 21:39:58,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:39:58,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 21:39:58,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-07-13 21:39:58,620 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:39:58,622 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 254 transitions, 4105 flow. Second operand has 29 states, 29 states have (on average 56.37931034482759) internal successors, (1635), 29 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:58,622 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:39:58,622 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:39:58,622 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:39:59,522 INFO L129 PetriNetUnfolder]: 230/1562 cut-off events. [2022-07-13 21:39:59,523 INFO L130 PetriNetUnfolder]: For 108129/108304 co-relation queries the response was YES. [2022-07-13 21:39:59,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9996 conditions, 1562 events. 230/1562 cut-off events. For 108129/108304 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9946 event pairs, 0 based on Foata normal form. 27/1422 useless extension candidates. Maximal degree in co-relation 9864. Up to 310 conditions per place. [2022-07-13 21:39:59,552 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 208 selfloop transitions, 47 changer transitions 26/326 dead transitions. [2022-07-13 21:39:59,552 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 326 transitions, 9251 flow [2022-07-13 21:39:59,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-13 21:39:59,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-13 21:39:59,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2134 transitions. [2022-07-13 21:39:59,595 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8239382239382239 [2022-07-13 21:39:59,595 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2134 transitions. [2022-07-13 21:39:59,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2134 transitions. [2022-07-13 21:39:59,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:39:59,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2134 transitions. [2022-07-13 21:39:59,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 57.67567567567568) internal successors, (2134), 37 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:59,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:59,603 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:59,603 INFO L186 Difference]: Start difference. First operand has 271 places, 254 transitions, 4105 flow. Second operand 37 states and 2134 transitions. [2022-07-13 21:39:59,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 326 transitions, 9251 flow [2022-07-13 21:39:59,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 326 transitions, 7432 flow, removed 884 selfloop flow, removed 18 redundant places. [2022-07-13 21:39:59,768 INFO L242 Difference]: Finished difference. Result has 297 places, 272 transitions, 4055 flow [2022-07-13 21:39:59,768 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3268, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4055, PETRI_PLACES=297, PETRI_TRANSITIONS=272} [2022-07-13 21:39:59,768 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 227 predicate places. [2022-07-13 21:39:59,769 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 272 transitions, 4055 flow [2022-07-13 21:39:59,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 56.37931034482759) internal successors, (1635), 29 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:39:59,769 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:39:59,770 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:39:59,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 21:39:59,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:39:59,993 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:39:59,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:39:59,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1732498166, now seen corresponding path program 6 times [2022-07-13 21:39:59,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:39:59,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315752036] [2022-07-13 21:39:59,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:39:59,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:00,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:00,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315752036] [2022-07-13 21:40:00,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315752036] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:00,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136784813] [2022-07-13 21:40:00,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 21:40:00,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:00,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:00,274 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:40:00,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 21:40:00,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-13 21:40:00,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:40:00,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 21:40:00,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:00,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:01,062 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:01,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136784813] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:01,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:01,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 31 [2022-07-13 21:40:01,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669328990] [2022-07-13 21:40:01,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:01,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-13 21:40:01,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:01,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-13 21:40:01,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2022-07-13 21:40:01,066 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:01,068 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 272 transitions, 4055 flow. Second operand has 31 states, 31 states have (on average 56.41935483870968) internal successors, (1749), 31 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:01,068 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:01,068 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:01,068 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:02,204 INFO L129 PetriNetUnfolder]: 288/2042 cut-off events. [2022-07-13 21:40:02,205 INFO L130 PetriNetUnfolder]: For 157984/158386 co-relation queries the response was YES. [2022-07-13 21:40:02,220 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13079 conditions, 2042 events. 288/2042 cut-off events. For 157984/158386 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 14544 event pairs, 0 based on Foata normal form. 35/1858 useless extension candidates. Maximal degree in co-relation 12939. Up to 424 conditions per place. [2022-07-13 21:40:02,239 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 164 selfloop transitions, 161 changer transitions 26/396 dead transitions. [2022-07-13 21:40:02,239 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 396 transitions, 10108 flow [2022-07-13 21:40:02,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-13 21:40:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-07-13 21:40:02,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2535 transitions. [2022-07-13 21:40:02,242 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.823051948051948 [2022-07-13 21:40:02,242 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2535 transitions. [2022-07-13 21:40:02,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2535 transitions. [2022-07-13 21:40:02,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:02,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2535 transitions. [2022-07-13 21:40:02,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 57.61363636363637) internal successors, (2535), 44 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:02,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 70.0) internal successors, (3150), 45 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:02,251 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 70.0) internal successors, (3150), 45 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:02,251 INFO L186 Difference]: Start difference. First operand has 297 places, 272 transitions, 4055 flow. Second operand 44 states and 2535 transitions. [2022-07-13 21:40:02,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 396 transitions, 10108 flow [2022-07-13 21:40:02,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 396 transitions, 9187 flow, removed 435 selfloop flow, removed 23 redundant places. [2022-07-13 21:40:02,530 INFO L242 Difference]: Finished difference. Result has 329 places, 329 transitions, 5357 flow [2022-07-13 21:40:02,530 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3534, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5357, PETRI_PLACES=329, PETRI_TRANSITIONS=329} [2022-07-13 21:40:02,531 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 259 predicate places. [2022-07-13 21:40:02,531 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 329 transitions, 5357 flow [2022-07-13 21:40:02,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 56.41935483870968) internal successors, (1749), 31 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:02,532 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:02,532 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:02,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 21:40:02,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:02,754 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:40:02,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:02,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1550528356, now seen corresponding path program 7 times [2022-07-13 21:40:02,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:02,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556664304] [2022-07-13 21:40:02,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:02,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:03,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:03,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556664304] [2022-07-13 21:40:03,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556664304] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:03,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673073864] [2022-07-13 21:40:03,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 21:40:03,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:03,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:03,006 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:40:03,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 21:40:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:03,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 21:40:03,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:03,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:03,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673073864] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:03,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:03,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 34 [2022-07-13 21:40:03,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276008043] [2022-07-13 21:40:03,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:03,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:40:03,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:03,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:40:03,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:40:03,743 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:03,744 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 329 transitions, 5357 flow. Second operand has 34 states, 34 states have (on average 56.38235294117647) internal successors, (1917), 34 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:03,745 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:03,745 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:03,745 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:05,186 INFO L129 PetriNetUnfolder]: 346/2516 cut-off events. [2022-07-13 21:40:05,186 INFO L130 PetriNetUnfolder]: For 243349/243669 co-relation queries the response was YES. [2022-07-13 21:40:05,216 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17454 conditions, 2516 events. 346/2516 cut-off events. For 243349/243669 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 19208 event pairs, 0 based on Foata normal form. 42/2290 useless extension candidates. Maximal degree in co-relation 17300. Up to 528 conditions per place. [2022-07-13 21:40:05,239 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 94 selfloop transitions, 298 changer transitions 26/463 dead transitions. [2022-07-13 21:40:05,239 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 463 transitions, 13439 flow [2022-07-13 21:40:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-13 21:40:05,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-13 21:40:05,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3000 transitions. [2022-07-13 21:40:05,243 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8241758241758241 [2022-07-13 21:40:05,243 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3000 transitions. [2022-07-13 21:40:05,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3000 transitions. [2022-07-13 21:40:05,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:05,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3000 transitions. [2022-07-13 21:40:05,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 57.69230769230769) internal successors, (3000), 52 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:05,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 70.0) internal successors, (3710), 53 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:05,252 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 70.0) internal successors, (3710), 53 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:05,253 INFO L186 Difference]: Start difference. First operand has 329 places, 329 transitions, 5357 flow. Second operand 52 states and 3000 transitions. [2022-07-13 21:40:05,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 463 transitions, 13439 flow [2022-07-13 21:40:05,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 463 transitions, 11873 flow, removed 704 selfloop flow, removed 30 redundant places. [2022-07-13 21:40:05,612 INFO L242 Difference]: Finished difference. Result has 363 places, 390 transitions, 7126 flow [2022-07-13 21:40:05,613 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=4619, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=7126, PETRI_PLACES=363, PETRI_TRANSITIONS=390} [2022-07-13 21:40:05,613 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 293 predicate places. [2022-07-13 21:40:05,613 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 390 transitions, 7126 flow [2022-07-13 21:40:05,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 56.38235294117647) internal successors, (1917), 34 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:05,614 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:05,614 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:05,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-13 21:40:05,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-13 21:40:05,815 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:40:05,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:05,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1659446404, now seen corresponding path program 8 times [2022-07-13 21:40:05,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:05,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044719040] [2022-07-13 21:40:05,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:05,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:06,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:06,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044719040] [2022-07-13 21:40:06,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044719040] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:06,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386969246] [2022-07-13 21:40:06,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:40:06,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:06,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:06,065 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:40:06,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 21:40:06,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:40:06,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:40:06,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 21:40:06,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:06,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:06,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386969246] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:06,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:06,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 35 [2022-07-13 21:40:06,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375587400] [2022-07-13 21:40:06,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:06,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-13 21:40:06,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:06,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-13 21:40:06,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2022-07-13 21:40:06,673 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:06,675 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 390 transitions, 7126 flow. Second operand has 35 states, 35 states have (on average 56.371428571428574) internal successors, (1973), 35 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:06,675 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:06,675 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:06,675 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:08,594 INFO L129 PetriNetUnfolder]: 414/2885 cut-off events. [2022-07-13 21:40:08,594 INFO L130 PetriNetUnfolder]: For 375803/376385 co-relation queries the response was YES. [2022-07-13 21:40:08,639 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22686 conditions, 2885 events. 414/2885 cut-off events. For 375803/376385 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 23050 event pairs, 0 based on Foata normal form. 55/2637 useless extension candidates. Maximal degree in co-relation 22518. Up to 624 conditions per place. [2022-07-13 21:40:08,667 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 82 selfloop transitions, 384 changer transitions 29/540 dead transitions. [2022-07-13 21:40:08,668 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 540 transitions, 17041 flow [2022-07-13 21:40:08,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-13 21:40:08,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-13 21:40:08,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3465 transitions. [2022-07-13 21:40:08,672 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.825 [2022-07-13 21:40:08,672 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3465 transitions. [2022-07-13 21:40:08,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3465 transitions. [2022-07-13 21:40:08,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:08,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3465 transitions. [2022-07-13 21:40:08,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 57.75) internal successors, (3465), 60 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:08,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 70.0) internal successors, (4270), 61 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:08,786 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 70.0) internal successors, (4270), 61 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:08,787 INFO L186 Difference]: Start difference. First operand has 363 places, 390 transitions, 7126 flow. Second operand 60 states and 3465 transitions. [2022-07-13 21:40:08,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 540 transitions, 17041 flow [2022-07-13 21:40:09,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 540 transitions, 14327 flow, removed 1201 selfloop flow, removed 34 redundant places. [2022-07-13 21:40:09,406 INFO L242 Difference]: Finished difference. Result has 404 places, 459 transitions, 8646 flow [2022-07-13 21:40:09,406 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=5778, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=8646, PETRI_PLACES=404, PETRI_TRANSITIONS=459} [2022-07-13 21:40:09,406 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 334 predicate places. [2022-07-13 21:40:09,407 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 459 transitions, 8646 flow [2022-07-13 21:40:09,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 56.371428571428574) internal successors, (1973), 35 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:09,407 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:09,407 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:09,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 21:40:09,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 21:40:09,613 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:40:09,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:09,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1558953164, now seen corresponding path program 9 times [2022-07-13 21:40:09,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:09,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32486280] [2022-07-13 21:40:09,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:09,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:09,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:09,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32486280] [2022-07-13 21:40:09,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32486280] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:09,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595256260] [2022-07-13 21:40:09,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 21:40:09,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:09,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:09,852 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:40:09,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 21:40:09,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-13 21:40:09,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:40:09,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-13 21:40:09,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:10,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:40:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:40:10,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595256260] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:40:10,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:40:10,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 27 [2022-07-13 21:40:10,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583291466] [2022-07-13 21:40:10,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:40:10,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 21:40:10,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:10,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 21:40:10,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2022-07-13 21:40:10,308 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-07-13 21:40:10,309 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 459 transitions, 8646 flow. Second operand has 27 states, 27 states have (on average 56.407407407407405) internal successors, (1523), 27 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:10,309 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:10,309 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-07-13 21:40:10,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:11,995 INFO L129 PetriNetUnfolder]: 423/2981 cut-off events. [2022-07-13 21:40:11,995 INFO L130 PetriNetUnfolder]: For 441153/441469 co-relation queries the response was YES. [2022-07-13 21:40:12,028 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24314 conditions, 2981 events. 423/2981 cut-off events. For 441153/441469 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 23870 event pairs, 0 based on Foata normal form. 54/2722 useless extension candidates. Maximal degree in co-relation 24129. Up to 638 conditions per place. [2022-07-13 21:40:12,062 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 89 selfloop transitions, 388 changer transitions 14/536 dead transitions. [2022-07-13 21:40:12,062 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 536 transitions, 16379 flow [2022-07-13 21:40:12,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-13 21:40:12,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-13 21:40:12,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2942 transitions. [2022-07-13 21:40:12,066 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8240896358543417 [2022-07-13 21:40:12,066 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2942 transitions. [2022-07-13 21:40:12,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2942 transitions. [2022-07-13 21:40:12,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:12,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2942 transitions. [2022-07-13 21:40:12,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 57.68627450980392) internal successors, (2942), 51 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:12,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 70.0) internal successors, (3640), 52 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:12,075 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 70.0) internal successors, (3640), 52 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:12,075 INFO L186 Difference]: Start difference. First operand has 404 places, 459 transitions, 8646 flow. Second operand 51 states and 2942 transitions. [2022-07-13 21:40:12,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 536 transitions, 16379 flow [2022-07-13 21:40:12,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 536 transitions, 14015 flow, removed 975 selfloop flow, removed 40 redundant places. [2022-07-13 21:40:12,912 INFO L242 Difference]: Finished difference. Result has 416 places, 478 transitions, 8967 flow [2022-07-13 21:40:12,913 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=7122, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=8967, PETRI_PLACES=416, PETRI_TRANSITIONS=478} [2022-07-13 21:40:12,913 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 346 predicate places. [2022-07-13 21:40:12,913 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 478 transitions, 8967 flow [2022-07-13 21:40:12,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 56.407407407407405) internal successors, (1523), 27 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:12,914 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:12,914 INFO L200 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:12,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-13 21:40:13,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 21:40:13,135 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:40:13,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:13,136 INFO L85 PathProgramCache]: Analyzing trace with hash -612323546, now seen corresponding path program 10 times [2022-07-13 21:40:13,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:13,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184205260] [2022-07-13 21:40:13,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:13,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:13,371 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 379 proven. 55 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 21:40:13,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:13,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184205260] [2022-07-13 21:40:13,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184205260] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:13,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722902877] [2022-07-13 21:40:13,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 21:40:13,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:13,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:13,373 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:40:13,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 21:40:13,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 21:40:13,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:40:13,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-13 21:40:13,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 21:40:13,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:40:13,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722902877] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:40:13,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:40:13,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2022-07-13 21:40:13,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102023458] [2022-07-13 21:40:13,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:40:13,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 21:40:13,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:13,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 21:40:13,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2022-07-13 21:40:13,573 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2022-07-13 21:40:13,574 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 478 transitions, 8967 flow. Second operand has 23 states, 23 states have (on average 59.91304347826087) internal successors, (1378), 23 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:13,574 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:13,574 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2022-07-13 21:40:13,574 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:17,922 INFO L129 PetriNetUnfolder]: 2347/12894 cut-off events. [2022-07-13 21:40:17,922 INFO L130 PetriNetUnfolder]: For 1579414/1579604 co-relation queries the response was YES. [2022-07-13 21:40:18,108 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93498 conditions, 12894 events. 2347/12894 cut-off events. For 1579414/1579604 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 150125 event pairs, 554 based on Foata normal form. 41/11499 useless extension candidates. Maximal degree in co-relation 93346. Up to 2604 conditions per place. [2022-07-13 21:40:18,140 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 14 selfloop transitions, 41 changer transitions 341/531 dead transitions. [2022-07-13 21:40:18,141 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 531 transitions, 8638 flow [2022-07-13 21:40:18,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-13 21:40:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-13 21:40:18,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2000 transitions. [2022-07-13 21:40:18,143 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8658008658008658 [2022-07-13 21:40:18,144 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2000 transitions. [2022-07-13 21:40:18,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2000 transitions. [2022-07-13 21:40:18,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:18,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2000 transitions. [2022-07-13 21:40:18,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 60.60606060606061) internal successors, (2000), 33 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:18,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:18,149 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:18,149 INFO L186 Difference]: Start difference. First operand has 416 places, 478 transitions, 8967 flow. Second operand 33 states and 2000 transitions. [2022-07-13 21:40:18,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 531 transitions, 8638 flow [2022-07-13 21:40:20,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 531 transitions, 7808 flow, removed 278 selfloop flow, removed 34 redundant places. [2022-07-13 21:40:20,693 INFO L242 Difference]: Finished difference. Result has 405 places, 180 transitions, 1792 flow [2022-07-13 21:40:20,694 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=7422, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1792, PETRI_PLACES=405, PETRI_TRANSITIONS=180} [2022-07-13 21:40:20,694 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 335 predicate places. [2022-07-13 21:40:20,694 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 180 transitions, 1792 flow [2022-07-13 21:40:20,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.91304347826087) internal successors, (1378), 23 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:20,695 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:40:20,695 INFO L200 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:40:20,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-13 21:40:20,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-13 21:40:20,896 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:40:20,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:40:20,896 INFO L85 PathProgramCache]: Analyzing trace with hash -813918605, now seen corresponding path program 11 times [2022-07-13 21:40:20,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:40:20,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471405824] [2022-07-13 21:40:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:40:20,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:40:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:40:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 380 proven. 55 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 21:40:21,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:40:21,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471405824] [2022-07-13 21:40:21,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471405824] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:40:21,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456679332] [2022-07-13 21:40:21,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 21:40:21,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:21,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:40:21,141 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:40:21,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 21:40:21,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-07-13 21:40:21,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:40:21,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-13 21:40:21,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:40:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 435 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 21:40:21,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:40:21,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456679332] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:40:21,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:40:21,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2022-07-13 21:40:21,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64379450] [2022-07-13 21:40:21,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:40:21,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 21:40:21,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:40:21,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 21:40:21,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2022-07-13 21:40:21,380 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2022-07-13 21:40:21,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 180 transitions, 1792 flow. Second operand has 23 states, 23 states have (on average 59.91304347826087) internal successors, (1378), 23 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:21,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:40:21,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2022-07-13 21:40:21,381 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:40:24,434 INFO L129 PetriNetUnfolder]: 3027/11681 cut-off events. [2022-07-13 21:40:24,434 INFO L130 PetriNetUnfolder]: For 1149378/1149665 co-relation queries the response was YES. [2022-07-13 21:40:24,613 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87759 conditions, 11681 events. 3027/11681 cut-off events. For 1149378/1149665 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 128473 event pairs, 680 based on Foata normal form. 35/10549 useless extension candidates. Maximal degree in co-relation 87617. Up to 2312 conditions per place. [2022-07-13 21:40:24,624 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 0 selfloop transitions, 0 changer transitions 219/219 dead transitions. [2022-07-13 21:40:24,624 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 219 transitions, 1828 flow [2022-07-13 21:40:24,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-13 21:40:24,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-13 21:40:24,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1969 transitions. [2022-07-13 21:40:24,627 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8523809523809524 [2022-07-13 21:40:24,627 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1969 transitions. [2022-07-13 21:40:24,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1969 transitions. [2022-07-13 21:40:24,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:40:24,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1969 transitions. [2022-07-13 21:40:24,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 59.666666666666664) internal successors, (1969), 33 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:24,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:24,633 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:24,633 INFO L186 Difference]: Start difference. First operand has 405 places, 180 transitions, 1792 flow. Second operand 33 states and 1969 transitions. [2022-07-13 21:40:24,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 219 transitions, 1828 flow [2022-07-13 21:40:25,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 219 transitions, 1402 flow, removed 94 selfloop flow, removed 72 redundant places. [2022-07-13 21:40:25,920 INFO L242 Difference]: Finished difference. Result has 292 places, 0 transitions, 0 flow [2022-07-13 21:40:25,920 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=0, PETRI_PLACES=292, PETRI_TRANSITIONS=0} [2022-07-13 21:40:25,920 INFO L279 CegarLoopForPetriNet]: 70 programPoint places, 222 predicate places. [2022-07-13 21:40:25,921 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 0 transitions, 0 flow [2022-07-13 21:40:25,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.91304347826087) internal successors, (1378), 23 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:40:25,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-07-13 21:40:25,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-07-13 21:40:25,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-07-13 21:40:25,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-13 21:40:26,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:40:26,124 INFO L356 BasicCegarLoop]: Path program histogram: [11, 3, 2, 1, 1, 1] [2022-07-13 21:40:26,127 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-13 21:40:26,127 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 21:40:26,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 09:40:26 BasicIcfg [2022-07-13 21:40:26,131 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 21:40:26,131 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 21:40:26,131 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 21:40:26,132 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 21:40:26,132 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:39:47" (3/4) ... [2022-07-13 21:40:26,134 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-13 21:40:26,140 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2022-07-13 21:40:26,140 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2022-07-13 21:40:26,144 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2022-07-13 21:40:26,145 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-13 21:40:26,145 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-13 21:40:26,145 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-13 21:40:26,168 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-13 21:40:26,168 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 21:40:26,168 INFO L158 Benchmark]: Toolchain (without parser) took 39121.65ms. Allocated memory was 113.2MB in the beginning and 7.7GB in the end (delta: 7.6GB). Free memory was 79.5MB in the beginning and 6.5GB in the end (delta: -6.5GB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2022-07-13 21:40:26,168 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 83.9MB. Free memory was 53.4MB in the beginning and 53.4MB in the end (delta: 21.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 21:40:26,169 INFO L158 Benchmark]: CACSL2BoogieTranslator took 405.54ms. Allocated memory is still 113.2MB. Free memory was 79.5MB in the beginning and 78.6MB in the end (delta: 830.0kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 21:40:26,169 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.26ms. Allocated memory is still 113.2MB. Free memory was 78.6MB in the beginning and 76.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 21:40:26,169 INFO L158 Benchmark]: Boogie Preprocessor took 40.35ms. Allocated memory is still 113.2MB. Free memory was 76.6MB in the beginning and 75.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 21:40:26,169 INFO L158 Benchmark]: RCFGBuilder took 380.82ms. Allocated memory is still 113.2MB. Free memory was 75.2MB in the beginning and 63.8MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-13 21:40:26,170 INFO L158 Benchmark]: TraceAbstraction took 38203.12ms. Allocated memory was 113.2MB in the beginning and 7.7GB in the end (delta: 7.6GB). Free memory was 63.3MB in the beginning and 6.5GB in the end (delta: -6.5GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2022-07-13 21:40:26,170 INFO L158 Benchmark]: Witness Printer took 36.62ms. Allocated memory is still 7.7GB. Free memory was 6.5GB in the beginning and 6.5GB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 21:40:26,171 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 83.9MB. Free memory was 53.4MB in the beginning and 53.4MB in the end (delta: 21.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 405.54ms. Allocated memory is still 113.2MB. Free memory was 79.5MB in the beginning and 78.6MB in the end (delta: 830.0kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.26ms. Allocated memory is still 113.2MB. Free memory was 78.6MB in the beginning and 76.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.35ms. Allocated memory is still 113.2MB. Free memory was 76.6MB in the beginning and 75.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 380.82ms. Allocated memory is still 113.2MB. Free memory was 75.2MB in the beginning and 63.8MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 38203.12ms. Allocated memory was 113.2MB in the beginning and 7.7GB in the end (delta: 7.6GB). Free memory was 63.3MB in the beginning and 6.5GB in the end (delta: -6.5GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. * Witness Printer took 36.62ms. Allocated memory is still 7.7GB. Free memory was 6.5GB in the beginning and 6.5GB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 722]: 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 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 38.1s, OverallIterations: 19, TraceHistogramMax: 11, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 26.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1029 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1029 mSDsluCounter, 353 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 546 mSDsCounter, 1494 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2980 IncrementalHoareTripleChecker+Invalid, 4474 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1494 mSolverCounterUnsat, 100 mSDtfsCounter, 2980 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2817 GetRequests, 2090 SyntacticMatches, 4 SemanticMatches, 723 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10476 ImplicationChecksByTransitivity, 8.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8967occurred in iteration=17, InterpolantAutomatonStates: 544, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 7.7s InterpolantComputationTime, 2703 NumberOfCodeBlocks, 2699 NumberOfCodeBlocksAsserted, 75 NumberOfCheckSat, 3597 ConstructedInterpolants, 0 QuantifiedInterpolants, 14135 SizeOfPredicates, 163 NumberOfNonLiveVariables, 2638 ConjunctsInSsa, 217 ConjunctsInUnsatCore, 41 InterpolantComputations, 9 PerfectInterpolantSequences, 1782/7028 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! [2022-07-13 21:40:26,200 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