./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-misc-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/parallel-misc-3.wvr.c -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 8e3c959108026afa89c4d07543133cda81a16d409ef9b7609f190c1caa51d799 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:29:33,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:29:33,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:29:33,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:29:33,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:29:33,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:29:33,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:29:33,877 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:29:33,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:29:33,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:29:33,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:29:33,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:29:33,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:29:33,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:29:33,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:29:33,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:29:33,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:29:33,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:29:33,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:29:33,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:29:33,889 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:29:33,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:29:33,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:29:33,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:29:33,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:29:33,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:29:33,896 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:29:33,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:29:33,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:29:33,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:29:33,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:29:33,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:29:33,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:29:33,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:29:33,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:29:33,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:29:33,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:29:33,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:29:33,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:29:33,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:29:33,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:29:33,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:29:33,905 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:29:33,922 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:29:33,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:29:33,923 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:29:33,923 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:29:33,924 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:29:33,924 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:29:33,925 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:29:33,925 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:29:33,925 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:29:33,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:29:33,926 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:29:33,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:29:33,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:29:33,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:29:33,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:29:33,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:29:33,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:29:33,927 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:29:33,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:29:33,927 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:29:33,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:29:33,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:29:33,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:29:33,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:29:33,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:29:33,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:29:33,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:29:33,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:29:33,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:29:33,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:29:33,930 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:29:33,930 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:29:33,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:29:33,930 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e3c959108026afa89c4d07543133cda81a16d409ef9b7609f190c1caa51d799 [2022-07-19 21:29:34,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:29:34,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:29:34,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:29:34,179 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:29:34,179 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:29:34,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-3.wvr.c [2022-07-19 21:29:34,256 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf82862ab/d0bd579a914143b2bee1229799305a19/FLAGf2512739c [2022-07-19 21:29:34,600 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:29:34,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-3.wvr.c [2022-07-19 21:29:34,607 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf82862ab/d0bd579a914143b2bee1229799305a19/FLAGf2512739c [2022-07-19 21:29:35,030 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf82862ab/d0bd579a914143b2bee1229799305a19 [2022-07-19 21:29:35,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:29:35,033 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:29:35,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:29:35,034 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:29:35,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:29:35,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:29:35" (1/1) ... [2022-07-19 21:29:35,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f42da76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:35, skipping insertion in model container [2022-07-19 21:29:35,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:29:35" (1/1) ... [2022-07-19 21:29:35,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:29:35,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:29:35,270 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/weaver/parallel-misc-3.wvr.c[2410,2423] [2022-07-19 21:29:35,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:29:35,281 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:29:35,316 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/weaver/parallel-misc-3.wvr.c[2410,2423] [2022-07-19 21:29:35,319 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:29:35,332 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:29:35,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:35 WrapperNode [2022-07-19 21:29:35,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:29:35,334 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:29:35,334 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:29:35,334 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:29:35,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:35" (1/1) ... [2022-07-19 21:29:35,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:35" (1/1) ... [2022-07-19 21:29:35,375 INFO L137 Inliner]: procedures = 21, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2022-07-19 21:29:35,376 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:29:35,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:29:35,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:29:35,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:29:35,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:35" (1/1) ... [2022-07-19 21:29:35,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:35" (1/1) ... [2022-07-19 21:29:35,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:35" (1/1) ... [2022-07-19 21:29:35,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:35" (1/1) ... [2022-07-19 21:29:35,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:35" (1/1) ... [2022-07-19 21:29:35,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:35" (1/1) ... [2022-07-19 21:29:35,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:35" (1/1) ... [2022-07-19 21:29:35,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:29:35,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:29:35,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:29:35,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:29:35,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:35" (1/1) ... [2022-07-19 21:29:35,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:29:35,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:29:35,421 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:29:35,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:29:35,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:29:35,451 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:29:35,451 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:29:35,451 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:29:35,451 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:29:35,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:29:35,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:29:35,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:29:35,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:29:35,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:29:35,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:29:35,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:29:35,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:29:35,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:29:35,454 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:29:35,527 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:29:35,528 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:29:35,663 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:29:35,683 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:29:35,683 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 21:29:35,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:29:35 BoogieIcfgContainer [2022-07-19 21:29:35,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:29:35,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:29:35,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:29:35,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:29:35,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:29:35" (1/3) ... [2022-07-19 21:29:35,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cdd6b9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:29:35, skipping insertion in model container [2022-07-19 21:29:35,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:35" (2/3) ... [2022-07-19 21:29:35,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cdd6b9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:29:35, skipping insertion in model container [2022-07-19 21:29:35,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:29:35" (3/3) ... [2022-07-19 21:29:35,693 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-3.wvr.c [2022-07-19 21:29:35,698 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:29:35,707 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:29:35,707 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:29:35,707 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:29:35,758 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:29:35,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 91 places, 95 transitions, 206 flow [2022-07-19 21:29:35,834 INFO L129 PetriNetUnfolder]: 11/93 cut-off events. [2022-07-19 21:29:35,835 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:29:35,839 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 93 events. 11/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 93 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 51. Up to 4 conditions per place. [2022-07-19 21:29:35,839 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 95 transitions, 206 flow [2022-07-19 21:29:35,844 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 84 transitions, 180 flow [2022-07-19 21:29:35,853 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:29:35,863 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@1df26c17, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@635ad2a9 [2022-07-19 21:29:35,863 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:29:35,909 INFO L129 PetriNetUnfolder]: 11/83 cut-off events. [2022-07-19 21:29:35,915 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:29:35,915 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:35,916 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:35,917 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:35,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:35,934 INFO L85 PathProgramCache]: Analyzing trace with hash -964819264, now seen corresponding path program 1 times [2022-07-19 21:29:35,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:35,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312530663] [2022-07-19 21:29:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:35,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:29:36,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:36,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312530663] [2022-07-19 21:29:36,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312530663] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:29:36,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:29:36,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:29:36,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733577570] [2022-07-19 21:29:36,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:29:36,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:29:36,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:36,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:29:36,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:29:36,226 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 95 [2022-07-19 21:29:36,231 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:36,232 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:36,232 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 95 [2022-07-19 21:29:36,233 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:36,317 INFO L129 PetriNetUnfolder]: 42/175 cut-off events. [2022-07-19 21:29:36,322 INFO L130 PetriNetUnfolder]: For 22/23 co-relation queries the response was YES. [2022-07-19 21:29:36,325 INFO L84 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 175 events. 42/175 cut-off events. For 22/23 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 425 event pairs, 3 based on Foata normal form. 7/152 useless extension candidates. Maximal degree in co-relation 156. Up to 24 conditions per place. [2022-07-19 21:29:36,329 INFO L132 encePairwiseOnDemand]: 89/95 looper letters, 14 selfloop transitions, 2 changer transitions 1/86 dead transitions. [2022-07-19 21:29:36,329 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 86 transitions, 219 flow [2022-07-19 21:29:36,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:29:36,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:29:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 262 transitions. [2022-07-19 21:29:36,349 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9192982456140351 [2022-07-19 21:29:36,349 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 262 transitions. [2022-07-19 21:29:36,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 262 transitions. [2022-07-19 21:29:36,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:36,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 262 transitions. [2022-07-19 21:29:36,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:36,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:36,371 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:36,373 INFO L186 Difference]: Start difference. First operand has 80 places, 84 transitions, 180 flow. Second operand 3 states and 262 transitions. [2022-07-19 21:29:36,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 86 transitions, 219 flow [2022-07-19 21:29:36,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 86 transitions, 209 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:29:36,384 INFO L242 Difference]: Finished difference. Result has 79 places, 81 transitions, 176 flow [2022-07-19 21:29:36,387 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2022-07-19 21:29:36,392 INFO L279 CegarLoopForPetriNet]: 80 programPoint places, -1 predicate places. [2022-07-19 21:29:36,393 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 176 flow [2022-07-19 21:29:36,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:36,394 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:36,395 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:36,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:29:36,395 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:36,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:36,397 INFO L85 PathProgramCache]: Analyzing trace with hash 170943632, now seen corresponding path program 1 times [2022-07-19 21:29:36,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:36,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811985665] [2022-07-19 21:29:36,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:36,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:36,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:36,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811985665] [2022-07-19 21:29:36,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811985665] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:29:36,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:29:36,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:29:36,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514540748] [2022-07-19 21:29:36,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:29:36,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:29:36,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:36,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:29:36,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:29:36,492 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 95 [2022-07-19 21:29:36,492 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:36,492 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:36,493 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 95 [2022-07-19 21:29:36,493 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:36,533 INFO L129 PetriNetUnfolder]: 27/141 cut-off events. [2022-07-19 21:29:36,533 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:29:36,534 INFO L84 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 141 events. 27/141 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 327 event pairs, 2 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 127. Up to 20 conditions per place. [2022-07-19 21:29:36,535 INFO L132 encePairwiseOnDemand]: 92/95 looper letters, 14 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2022-07-19 21:29:36,535 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 86 transitions, 219 flow [2022-07-19 21:29:36,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:29:36,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:29:36,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2022-07-19 21:29:36,554 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9017543859649123 [2022-07-19 21:29:36,554 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2022-07-19 21:29:36,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2022-07-19 21:29:36,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:36,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2022-07-19 21:29:36,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:36,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:36,557 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:36,557 INFO L186 Difference]: Start difference. First operand has 79 places, 81 transitions, 176 flow. Second operand 3 states and 257 transitions. [2022-07-19 21:29:36,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 86 transitions, 219 flow [2022-07-19 21:29:36,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 86 transitions, 217 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:29:36,559 INFO L242 Difference]: Finished difference. Result has 80 places, 82 transitions, 186 flow [2022-07-19 21:29:36,560 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=80, PETRI_TRANSITIONS=82} [2022-07-19 21:29:36,561 INFO L279 CegarLoopForPetriNet]: 80 programPoint places, 0 predicate places. [2022-07-19 21:29:36,561 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 82 transitions, 186 flow [2022-07-19 21:29:36,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:36,562 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:36,563 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:36,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:29:36,563 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:36,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:36,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2136377010, now seen corresponding path program 1 times [2022-07-19 21:29:36,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:36,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138352297] [2022-07-19 21:29:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:36,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:36,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:36,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138352297] [2022-07-19 21:29:36,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138352297] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:29:36,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:29:36,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:29:36,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967811405] [2022-07-19 21:29:36,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:29:36,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:29:36,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:36,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:29:36,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:29:36,687 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 95 [2022-07-19 21:29:36,688 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 82 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:36,688 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:36,688 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 95 [2022-07-19 21:29:36,688 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:36,744 INFO L129 PetriNetUnfolder]: 34/155 cut-off events. [2022-07-19 21:29:36,751 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:29:36,753 INFO L84 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 155 events. 34/155 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 482 event pairs, 2 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 179. Up to 45 conditions per place. [2022-07-19 21:29:36,755 INFO L132 encePairwiseOnDemand]: 92/95 looper letters, 15 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2022-07-19 21:29:36,755 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 86 transitions, 229 flow [2022-07-19 21:29:36,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:29:36,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:29:36,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2022-07-19 21:29:36,758 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8842105263157894 [2022-07-19 21:29:36,759 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 252 transitions. [2022-07-19 21:29:36,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 252 transitions. [2022-07-19 21:29:36,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:36,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 252 transitions. [2022-07-19 21:29:36,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:36,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:36,764 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:36,764 INFO L186 Difference]: Start difference. First operand has 80 places, 82 transitions, 186 flow. Second operand 3 states and 252 transitions. [2022-07-19 21:29:36,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 86 transitions, 229 flow [2022-07-19 21:29:36,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 86 transitions, 227 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:29:36,767 INFO L242 Difference]: Finished difference. Result has 82 places, 83 transitions, 196 flow [2022-07-19 21:29:36,768 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=82, PETRI_TRANSITIONS=83} [2022-07-19 21:29:36,770 INFO L279 CegarLoopForPetriNet]: 80 programPoint places, 2 predicate places. [2022-07-19 21:29:36,770 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 83 transitions, 196 flow [2022-07-19 21:29:36,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:36,771 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:36,771 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:36,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:29:36,772 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:36,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:36,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1965217384, now seen corresponding path program 1 times [2022-07-19 21:29:36,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:36,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268055007] [2022-07-19 21:29:36,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:36,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:36,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:36,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268055007] [2022-07-19 21:29:36,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268055007] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:29:36,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:29:36,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:29:36,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992099435] [2022-07-19 21:29:36,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:29:36,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:29:36,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:36,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:29:36,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:29:36,925 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 95 [2022-07-19 21:29:36,926 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 83 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:36,926 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:36,926 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 95 [2022-07-19 21:29:36,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:37,035 INFO L129 PetriNetUnfolder]: 117/360 cut-off events. [2022-07-19 21:29:37,035 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-19 21:29:37,038 INFO L84 FinitePrefix]: Finished finitePrefix Result has 555 conditions, 360 events. 117/360 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1604 event pairs, 7 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 368. Up to 112 conditions per place. [2022-07-19 21:29:37,040 INFO L132 encePairwiseOnDemand]: 92/95 looper letters, 16 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2022-07-19 21:29:37,040 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 88 transitions, 243 flow [2022-07-19 21:29:37,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:29:37,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:29:37,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2022-07-19 21:29:37,042 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.887719298245614 [2022-07-19 21:29:37,042 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 253 transitions. [2022-07-19 21:29:37,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 253 transitions. [2022-07-19 21:29:37,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:37,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 253 transitions. [2022-07-19 21:29:37,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:37,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:37,049 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:37,049 INFO L186 Difference]: Start difference. First operand has 82 places, 83 transitions, 196 flow. Second operand 3 states and 253 transitions. [2022-07-19 21:29:37,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 88 transitions, 243 flow [2022-07-19 21:29:37,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 88 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:29:37,055 INFO L242 Difference]: Finished difference. Result has 84 places, 84 transitions, 206 flow [2022-07-19 21:29:37,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=84, PETRI_TRANSITIONS=84} [2022-07-19 21:29:37,057 INFO L279 CegarLoopForPetriNet]: 80 programPoint places, 4 predicate places. [2022-07-19 21:29:37,057 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 84 transitions, 206 flow [2022-07-19 21:29:37,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:37,062 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:37,062 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:37,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:29:37,063 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:37,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:37,063 INFO L85 PathProgramCache]: Analyzing trace with hash 430590654, now seen corresponding path program 1 times [2022-07-19 21:29:37,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:37,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497579722] [2022-07-19 21:29:37,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:37,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:37,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:29:37,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:37,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497579722] [2022-07-19 21:29:37,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497579722] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:29:37,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:29:37,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:29:37,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226438440] [2022-07-19 21:29:37,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:29:37,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:29:37,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:37,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:29:37,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:29:37,197 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 95 [2022-07-19 21:29:37,197 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 84 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:37,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:37,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 95 [2022-07-19 21:29:37,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:37,265 INFO L129 PetriNetUnfolder]: 31/190 cut-off events. [2022-07-19 21:29:37,265 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-07-19 21:29:37,266 INFO L84 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 190 events. 31/190 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 656 event pairs, 10 based on Foata normal form. 8/187 useless extension candidates. Maximal degree in co-relation 238. Up to 35 conditions per place. [2022-07-19 21:29:37,269 INFO L132 encePairwiseOnDemand]: 88/95 looper letters, 13 selfloop transitions, 5 changer transitions 0/88 dead transitions. [2022-07-19 21:29:37,269 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 88 transitions, 255 flow [2022-07-19 21:29:37,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:29:37,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:29:37,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 333 transitions. [2022-07-19 21:29:37,270 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8763157894736842 [2022-07-19 21:29:37,271 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 333 transitions. [2022-07-19 21:29:37,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 333 transitions. [2022-07-19 21:29:37,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:37,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 333 transitions. [2022-07-19 21:29:37,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:37,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:37,274 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:37,274 INFO L186 Difference]: Start difference. First operand has 84 places, 84 transitions, 206 flow. Second operand 4 states and 333 transitions. [2022-07-19 21:29:37,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 88 transitions, 255 flow [2022-07-19 21:29:37,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 88 transitions, 253 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:29:37,279 INFO L242 Difference]: Finished difference. Result has 88 places, 85 transitions, 235 flow [2022-07-19 21:29:37,279 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=235, PETRI_PLACES=88, PETRI_TRANSITIONS=85} [2022-07-19 21:29:37,282 INFO L279 CegarLoopForPetriNet]: 80 programPoint places, 8 predicate places. [2022-07-19 21:29:37,282 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 85 transitions, 235 flow [2022-07-19 21:29:37,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:37,283 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:37,283 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:37,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:29:37,284 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:37,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:37,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1601542053, now seen corresponding path program 1 times [2022-07-19 21:29:37,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:37,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936830670] [2022-07-19 21:29:37,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:37,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 21:29:37,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:37,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936830670] [2022-07-19 21:29:37,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936830670] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:29:37,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:29:37,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:29:37,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111148821] [2022-07-19 21:29:37,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:29:37,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:29:37,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:37,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:29:37,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:29:37,375 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 95 [2022-07-19 21:29:37,376 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 85 transitions, 235 flow. Second operand has 4 states, 4 states have (on average 80.75) internal successors, (323), 4 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:37,376 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:37,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 95 [2022-07-19 21:29:37,377 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:37,508 INFO L129 PetriNetUnfolder]: 132/632 cut-off events. [2022-07-19 21:29:37,508 INFO L130 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2022-07-19 21:29:37,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1088 conditions, 632 events. 132/632 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3818 event pairs, 54 based on Foata normal form. 32/614 useless extension candidates. Maximal degree in co-relation 709. Up to 127 conditions per place. [2022-07-19 21:29:37,515 INFO L132 encePairwiseOnDemand]: 88/95 looper letters, 14 selfloop transitions, 5 changer transitions 0/90 dead transitions. [2022-07-19 21:29:37,515 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 90 transitions, 287 flow [2022-07-19 21:29:37,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:29:37,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:29:37,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 334 transitions. [2022-07-19 21:29:37,517 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8789473684210526 [2022-07-19 21:29:37,517 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 334 transitions. [2022-07-19 21:29:37,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 334 transitions. [2022-07-19 21:29:37,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:37,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 334 transitions. [2022-07-19 21:29:37,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 83.5) internal successors, (334), 4 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:37,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:37,521 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:37,521 INFO L186 Difference]: Start difference. First operand has 88 places, 85 transitions, 235 flow. Second operand 4 states and 334 transitions. [2022-07-19 21:29:37,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 90 transitions, 287 flow [2022-07-19 21:29:37,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 282 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-19 21:29:37,527 INFO L242 Difference]: Finished difference. Result has 92 places, 86 transitions, 261 flow [2022-07-19 21:29:37,527 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=261, PETRI_PLACES=92, PETRI_TRANSITIONS=86} [2022-07-19 21:29:37,529 INFO L279 CegarLoopForPetriNet]: 80 programPoint places, 12 predicate places. [2022-07-19 21:29:37,529 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 86 transitions, 261 flow [2022-07-19 21:29:37,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.75) internal successors, (323), 4 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:37,530 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:37,530 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:37,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:29:37,531 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:37,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:37,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1527711555, now seen corresponding path program 1 times [2022-07-19 21:29:37,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:37,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814616324] [2022-07-19 21:29:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:37,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:37,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:29:37,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:37,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814616324] [2022-07-19 21:29:37,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814616324] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:29:37,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641307083] [2022-07-19 21:29:37,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:37,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:29:37,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:29:37,693 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:29:37,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:29:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:37,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 21:29:37,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:29:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:29:37,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:29:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:29:38,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641307083] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:29:38,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:29:38,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-07-19 21:29:38,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141292122] [2022-07-19 21:29:38,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:29:38,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:29:38,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:38,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:29:38,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:29:38,132 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 95 [2022-07-19 21:29:38,133 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 86 transitions, 261 flow. Second operand has 7 states, 7 states have (on average 78.85714285714286) internal successors, (552), 7 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:38,133 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:38,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 95 [2022-07-19 21:29:38,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:38,300 INFO L129 PetriNetUnfolder]: 95/670 cut-off events. [2022-07-19 21:29:38,300 INFO L130 PetriNetUnfolder]: For 188/188 co-relation queries the response was YES. [2022-07-19 21:29:38,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1189 conditions, 670 events. 95/670 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4050 event pairs, 16 based on Foata normal form. 1/630 useless extension candidates. Maximal degree in co-relation 820. Up to 100 conditions per place. [2022-07-19 21:29:38,309 INFO L132 encePairwiseOnDemand]: 87/95 looper letters, 26 selfloop transitions, 7 changer transitions 4/110 dead transitions. [2022-07-19 21:29:38,309 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 110 transitions, 390 flow [2022-07-19 21:29:38,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:29:38,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:29:38,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 577 transitions. [2022-07-19 21:29:38,311 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8676691729323308 [2022-07-19 21:29:38,311 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 577 transitions. [2022-07-19 21:29:38,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 577 transitions. [2022-07-19 21:29:38,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:38,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 577 transitions. [2022-07-19 21:29:38,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.42857142857143) internal successors, (577), 7 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:38,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 95.0) internal successors, (760), 8 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:38,315 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 95.0) internal successors, (760), 8 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:38,315 INFO L186 Difference]: Start difference. First operand has 92 places, 86 transitions, 261 flow. Second operand 7 states and 577 transitions. [2022-07-19 21:29:38,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 110 transitions, 390 flow [2022-07-19 21:29:38,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 110 transitions, 385 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-19 21:29:38,321 INFO L242 Difference]: Finished difference. Result has 102 places, 92 transitions, 307 flow [2022-07-19 21:29:38,321 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=307, PETRI_PLACES=102, PETRI_TRANSITIONS=92} [2022-07-19 21:29:38,322 INFO L279 CegarLoopForPetriNet]: 80 programPoint places, 22 predicate places. [2022-07-19 21:29:38,322 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 92 transitions, 307 flow [2022-07-19 21:29:38,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 78.85714285714286) internal successors, (552), 7 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:38,323 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:38,323 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:38,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:29:38,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:29:38,540 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:38,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:38,540 INFO L85 PathProgramCache]: Analyzing trace with hash 913735953, now seen corresponding path program 2 times [2022-07-19 21:29:38,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:38,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917195426] [2022-07-19 21:29:38,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:38,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:38,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:38,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917195426] [2022-07-19 21:29:38,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917195426] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:29:38,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947184698] [2022-07-19 21:29:38,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:29:38,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:29:38,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:29:38,653 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:29:38,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:29:38,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:29:38,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:29:38,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 21:29:38,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:29:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:38,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:29:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:29:38,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947184698] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:29:38,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:29:38,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-07-19 21:29:38,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125699075] [2022-07-19 21:29:38,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:29:38,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:29:38,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:38,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:29:38,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:29:38,983 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 95 [2022-07-19 21:29:38,984 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 92 transitions, 307 flow. Second operand has 7 states, 7 states have (on average 78.85714285714286) internal successors, (552), 7 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:38,984 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:38,984 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 95 [2022-07-19 21:29:38,984 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:39,175 INFO L129 PetriNetUnfolder]: 132/947 cut-off events. [2022-07-19 21:29:39,175 INFO L130 PetriNetUnfolder]: For 436/454 co-relation queries the response was YES. [2022-07-19 21:29:39,180 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1894 conditions, 947 events. 132/947 cut-off events. For 436/454 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 6734 event pairs, 10 based on Foata normal form. 9/902 useless extension candidates. Maximal degree in co-relation 1838. Up to 159 conditions per place. [2022-07-19 21:29:39,185 INFO L132 encePairwiseOnDemand]: 87/95 looper letters, 32 selfloop transitions, 11 changer transitions 4/120 dead transitions. [2022-07-19 21:29:39,185 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 120 transitions, 507 flow [2022-07-19 21:29:39,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:29:39,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:29:39,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 577 transitions. [2022-07-19 21:29:39,187 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8676691729323308 [2022-07-19 21:29:39,187 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 577 transitions. [2022-07-19 21:29:39,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 577 transitions. [2022-07-19 21:29:39,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:39,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 577 transitions. [2022-07-19 21:29:39,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.42857142857143) internal successors, (577), 7 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:39,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 95.0) internal successors, (760), 8 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:39,192 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 95.0) internal successors, (760), 8 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:39,192 INFO L186 Difference]: Start difference. First operand has 102 places, 92 transitions, 307 flow. Second operand 7 states and 577 transitions. [2022-07-19 21:29:39,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 120 transitions, 507 flow [2022-07-19 21:29:39,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 120 transitions, 493 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-07-19 21:29:39,197 INFO L242 Difference]: Finished difference. Result has 109 places, 102 transitions, 412 flow [2022-07-19 21:29:39,198 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=412, PETRI_PLACES=109, PETRI_TRANSITIONS=102} [2022-07-19 21:29:39,198 INFO L279 CegarLoopForPetriNet]: 80 programPoint places, 29 predicate places. [2022-07-19 21:29:39,199 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 102 transitions, 412 flow [2022-07-19 21:29:39,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 78.85714285714286) internal successors, (552), 7 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:39,199 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:39,199 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:39,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:29:39,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-19 21:29:39,416 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:39,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:39,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1214228917, now seen corresponding path program 3 times [2022-07-19 21:29:39,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:39,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145368641] [2022-07-19 21:29:39,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:39,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:29:39,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:39,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145368641] [2022-07-19 21:29:39,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145368641] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:29:39,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29216594] [2022-07-19 21:29:39,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:29:39,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:29:39,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:29:39,549 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:29:39,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:29:39,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 21:29:39,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:29:39,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 21:29:39,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:29:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:29:39,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:29:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:29:39,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29216594] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:29:39,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:29:39,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-07-19 21:29:39,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645263462] [2022-07-19 21:29:39,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:29:39,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:29:39,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:39,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:29:39,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:29:39,848 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 95 [2022-07-19 21:29:39,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 102 transitions, 412 flow. Second operand has 8 states, 8 states have (on average 78.625) internal successors, (629), 8 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:39,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:39,850 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 95 [2022-07-19 21:29:39,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:40,038 INFO L129 PetriNetUnfolder]: 131/934 cut-off events. [2022-07-19 21:29:40,039 INFO L130 PetriNetUnfolder]: For 821/865 co-relation queries the response was YES. [2022-07-19 21:29:40,044 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2041 conditions, 934 events. 131/934 cut-off events. For 821/865 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 6599 event pairs, 6 based on Foata normal form. 39/922 useless extension candidates. Maximal degree in co-relation 1986. Up to 87 conditions per place. [2022-07-19 21:29:40,048 INFO L132 encePairwiseOnDemand]: 87/95 looper letters, 22 selfloop transitions, 25 changer transitions 4/124 dead transitions. [2022-07-19 21:29:40,049 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 124 transitions, 603 flow [2022-07-19 21:29:40,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:29:40,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:29:40,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 652 transitions. [2022-07-19 21:29:40,051 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8578947368421053 [2022-07-19 21:29:40,052 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 652 transitions. [2022-07-19 21:29:40,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 652 transitions. [2022-07-19 21:29:40,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:40,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 652 transitions. [2022-07-19 21:29:40,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 81.5) internal successors, (652), 8 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:40,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 95.0) internal successors, (855), 9 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:40,056 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 95.0) internal successors, (855), 9 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:40,056 INFO L186 Difference]: Start difference. First operand has 109 places, 102 transitions, 412 flow. Second operand 8 states and 652 transitions. [2022-07-19 21:29:40,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 124 transitions, 603 flow [2022-07-19 21:29:40,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 124 transitions, 585 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-07-19 21:29:40,062 INFO L242 Difference]: Finished difference. Result has 115 places, 106 transitions, 499 flow [2022-07-19 21:29:40,062 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=499, PETRI_PLACES=115, PETRI_TRANSITIONS=106} [2022-07-19 21:29:40,063 INFO L279 CegarLoopForPetriNet]: 80 programPoint places, 35 predicate places. [2022-07-19 21:29:40,063 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 106 transitions, 499 flow [2022-07-19 21:29:40,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 78.625) internal successors, (629), 8 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:40,064 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:40,064 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:40,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:29:40,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:29:40,280 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:40,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:40,280 INFO L85 PathProgramCache]: Analyzing trace with hash -927880900, now seen corresponding path program 4 times [2022-07-19 21:29:40,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:40,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977529459] [2022-07-19 21:29:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:40,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:29:40,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:40,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977529459] [2022-07-19 21:29:40,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977529459] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:29:40,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:29:40,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:29:40,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526630393] [2022-07-19 21:29:40,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:29:40,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:29:40,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:40,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:29:40,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:29:40,331 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 95 [2022-07-19 21:29:40,332 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 106 transitions, 499 flow. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:40,332 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:40,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 95 [2022-07-19 21:29:40,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:40,431 INFO L129 PetriNetUnfolder]: 109/742 cut-off events. [2022-07-19 21:29:40,432 INFO L130 PetriNetUnfolder]: For 1031/1109 co-relation queries the response was YES. [2022-07-19 21:29:40,438 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1803 conditions, 742 events. 109/742 cut-off events. For 1031/1109 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4799 event pairs, 10 based on Foata normal form. 28/727 useless extension candidates. Maximal degree in co-relation 1773. Up to 113 conditions per place. [2022-07-19 21:29:40,441 INFO L132 encePairwiseOnDemand]: 91/95 looper letters, 20 selfloop transitions, 4 changer transitions 0/108 dead transitions. [2022-07-19 21:29:40,442 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 108 transitions, 552 flow [2022-07-19 21:29:40,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:29:40,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:29:40,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2022-07-19 21:29:40,444 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8912280701754386 [2022-07-19 21:29:40,444 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 254 transitions. [2022-07-19 21:29:40,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 254 transitions. [2022-07-19 21:29:40,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:40,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 254 transitions. [2022-07-19 21:29:40,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:40,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:40,447 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:40,447 INFO L186 Difference]: Start difference. First operand has 115 places, 106 transitions, 499 flow. Second operand 3 states and 254 transitions. [2022-07-19 21:29:40,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 108 transitions, 552 flow [2022-07-19 21:29:40,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 108 transitions, 531 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-07-19 21:29:40,454 INFO L242 Difference]: Finished difference. Result has 113 places, 107 transitions, 500 flow [2022-07-19 21:29:40,455 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=500, PETRI_PLACES=113, PETRI_TRANSITIONS=107} [2022-07-19 21:29:40,455 INFO L279 CegarLoopForPetriNet]: 80 programPoint places, 33 predicate places. [2022-07-19 21:29:40,456 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 107 transitions, 500 flow [2022-07-19 21:29:40,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:40,456 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:29:40,456 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:40,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 21:29:40,457 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:29:40,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:29:40,457 INFO L85 PathProgramCache]: Analyzing trace with hash -403236715, now seen corresponding path program 5 times [2022-07-19 21:29:40,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:29:40,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007605908] [2022-07-19 21:29:40,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:29:40,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:29:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:29:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 21:29:40,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:29:40,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007605908] [2022-07-19 21:29:40,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007605908] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:29:40,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:29:40,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:29:40,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016234026] [2022-07-19 21:29:40,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:29:40,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:29:40,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:29:40,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:29:40,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:29:40,505 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 95 [2022-07-19 21:29:40,506 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 107 transitions, 500 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:40,506 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:29:40,506 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 95 [2022-07-19 21:29:40,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:29:40,648 INFO L129 PetriNetUnfolder]: 224/1049 cut-off events. [2022-07-19 21:29:40,649 INFO L130 PetriNetUnfolder]: For 1744/1762 co-relation queries the response was YES. [2022-07-19 21:29:40,655 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2795 conditions, 1049 events. 224/1049 cut-off events. For 1744/1762 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 7649 event pairs, 41 based on Foata normal form. 37/1011 useless extension candidates. Maximal degree in co-relation 2381. Up to 227 conditions per place. [2022-07-19 21:29:40,657 INFO L132 encePairwiseOnDemand]: 91/95 looper letters, 0 selfloop transitions, 0 changer transitions 109/109 dead transitions. [2022-07-19 21:29:40,657 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 109 transitions, 609 flow [2022-07-19 21:29:40,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:29:40,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:29:40,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 256 transitions. [2022-07-19 21:29:40,659 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8982456140350877 [2022-07-19 21:29:40,659 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 256 transitions. [2022-07-19 21:29:40,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 256 transitions. [2022-07-19 21:29:40,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:29:40,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 256 transitions. [2022-07-19 21:29:40,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:40,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:40,662 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:40,662 INFO L186 Difference]: Start difference. First operand has 113 places, 107 transitions, 500 flow. Second operand 3 states and 256 transitions. [2022-07-19 21:29:40,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 109 transitions, 609 flow [2022-07-19 21:29:40,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 109 transitions, 576 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-19 21:29:40,669 INFO L242 Difference]: Finished difference. Result has 106 places, 0 transitions, 0 flow [2022-07-19 21:29:40,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=106, PETRI_TRANSITIONS=0} [2022-07-19 21:29:40,670 INFO L279 CegarLoopForPetriNet]: 80 programPoint places, 26 predicate places. [2022-07-19 21:29:40,670 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 0 transitions, 0 flow [2022-07-19 21:29:40,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:29:40,673 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-07-19 21:29:40,673 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-07-19 21:29:40,674 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-07-19 21:29:40,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 21:29:40,674 INFO L356 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1, 1, 1, 1] [2022-07-19 21:29:40,677 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-19 21:29:40,677 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 21:29:40,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:29:40 BasicIcfg [2022-07-19 21:29:40,683 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 21:29:40,684 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 21:29:40,684 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 21:29:40,684 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 21:29:40,684 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:29:35" (3/4) ... [2022-07-19 21:29:40,687 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-19 21:29:40,692 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2022-07-19 21:29:40,692 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2022-07-19 21:29:40,697 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2022-07-19 21:29:40,697 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-07-19 21:29:40,697 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-19 21:29:40,697 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-19 21:29:40,731 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 21:29:40,731 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 21:29:40,732 INFO L158 Benchmark]: Toolchain (without parser) took 5698.84ms. Allocated memory was 79.7MB in the beginning and 163.6MB in the end (delta: 83.9MB). Free memory was 45.1MB in the beginning and 112.8MB in the end (delta: -67.6MB). Peak memory consumption was 16.6MB. Max. memory is 16.1GB. [2022-07-19 21:29:40,732 INFO L158 Benchmark]: CDTParser took 0.74ms. Allocated memory is still 79.7MB. Free memory was 52.1MB in the beginning and 52.0MB in the end (delta: 30.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 21:29:40,733 INFO L158 Benchmark]: CACSL2BoogieTranslator took 299.08ms. Allocated memory was 79.7MB in the beginning and 113.2MB in the end (delta: 33.6MB). Free memory was 45.0MB in the beginning and 88.9MB in the end (delta: -43.9MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. [2022-07-19 21:29:40,733 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.76ms. Allocated memory is still 113.2MB. Free memory was 88.9MB in the beginning and 87.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 21:29:40,733 INFO L158 Benchmark]: Boogie Preprocessor took 18.79ms. Allocated memory is still 113.2MB. Free memory was 87.4MB in the beginning and 86.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 21:29:40,734 INFO L158 Benchmark]: RCFGBuilder took 289.13ms. Allocated memory is still 113.2MB. Free memory was 86.0MB in the beginning and 73.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-19 21:29:40,734 INFO L158 Benchmark]: TraceAbstraction took 4995.72ms. Allocated memory was 113.2MB in the beginning and 163.6MB in the end (delta: 50.3MB). Free memory was 73.1MB in the beginning and 115.9MB in the end (delta: -42.8MB). Peak memory consumption was 73.3MB. Max. memory is 16.1GB. [2022-07-19 21:29:40,734 INFO L158 Benchmark]: Witness Printer took 47.74ms. Allocated memory is still 163.6MB. Free memory was 114.9MB in the beginning and 112.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 21:29:40,737 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.74ms. Allocated memory is still 79.7MB. Free memory was 52.1MB in the beginning and 52.0MB in the end (delta: 30.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 299.08ms. Allocated memory was 79.7MB in the beginning and 113.2MB in the end (delta: 33.6MB). Free memory was 45.0MB in the beginning and 88.9MB in the end (delta: -43.9MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.76ms. Allocated memory is still 113.2MB. Free memory was 88.9MB in the beginning and 87.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 18.79ms. Allocated memory is still 113.2MB. Free memory was 87.4MB in the beginning and 86.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 289.13ms. Allocated memory is still 113.2MB. Free memory was 86.0MB in the beginning and 73.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 4995.72ms. Allocated memory was 113.2MB in the beginning and 163.6MB in the end (delta: 50.3MB). Free memory was 73.1MB in the beginning and 115.9MB in the end (delta: -42.8MB). Peak memory consumption was 73.3MB. Max. memory is 16.1GB. * Witness Printer took 47.74ms. Allocated memory is still 163.6MB. Free memory was 114.9MB in the beginning and 112.8MB 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: 101]: 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, 113 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.1s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.9s, OverallIterations: 11, TraceHistogramMax: 3, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 98 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 98 mSDsluCounter, 162 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 273 mSDsCounter, 18 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 550 IncrementalHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18 mSolverCounterUnsat, 63 mSDtfsCounter, 550 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 535 GetRequests, 483 SyntacticMatches, 20 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=500occurred in iteration=10, InterpolantAutomatonStates: 48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 1051 NumberOfCodeBlocks, 1051 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 1274 ConstructedInterpolants, 0 QuantifiedInterpolants, 3783 SizeOfPredicates, 6 NumberOfNonLiveVariables, 531 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 17 InterpolantComputations, 8 PerfectInterpolantSequences, 67/166 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! [2022-07-19 21:29:40,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE