./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2305533b08f16ed55fe1768852f1afe1d6f847d5ca6bb0bf597caf3ef6acd368 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:20:12,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:20:12,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:20:12,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:20:12,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:20:12,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:20:12,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:20:12,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:20:12,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:20:12,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:20:12,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:20:12,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:20:12,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:20:12,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:20:12,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:20:12,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:20:12,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:20:12,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:20:12,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:20:12,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:20:12,128 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:20:12,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:20:12,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:20:12,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:20:12,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:20:12,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:20:12,138 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:20:12,138 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:20:12,139 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:20:12,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:20:12,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:20:12,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:20:12,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:20:12,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:20:12,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:20:12,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:20:12,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:20:12,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:20:12,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:20:12,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:20:12,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:20:12,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:20:12,149 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:20:12,178 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:20:12,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:20:12,179 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:20:12,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:20:12,180 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:20:12,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:20:12,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:20:12,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:20:12,181 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:20:12,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:20:12,182 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:20:12,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:20:12,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:20:12,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:20:12,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:20:12,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:20:12,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:20:12,183 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:20:12,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:20:12,183 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:20:12,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:20:12,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:20:12,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:20:12,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:20:12,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:20:12,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:20:12,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:20:12,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:20:12,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:20:12,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:20:12,186 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:20:12,186 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:20:12,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:20:12,186 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2305533b08f16ed55fe1768852f1afe1d6f847d5ca6bb0bf597caf3ef6acd368 [2022-07-19 21:20:12,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:20:12,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:20:12,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:20:12,435 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:20:12,436 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:20:12,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i [2022-07-19 21:20:12,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c901f4d1/4f0222f761f84e40a4c7f2f02a6efc87/FLAGb52e51b77 [2022-07-19 21:20:12,936 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:20:12,937 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i [2022-07-19 21:20:12,959 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c901f4d1/4f0222f761f84e40a4c7f2f02a6efc87/FLAGb52e51b77 [2022-07-19 21:20:12,970 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c901f4d1/4f0222f761f84e40a4c7f2f02a6efc87 [2022-07-19 21:20:12,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:20:12,973 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:20:12,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:20:12,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:20:12,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:20:12,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:20:12" (1/1) ... [2022-07-19 21:20:12,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49529153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:12, skipping insertion in model container [2022-07-19 21:20:12,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:20:12" (1/1) ... [2022-07-19 21:20:12,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:20:13,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:20:13,379 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/goblint-regression/28-race_reach_79-equ_racefree.i[47038,47051] [2022-07-19 21:20:13,413 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:20:13,424 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:20:13,458 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/goblint-regression/28-race_reach_79-equ_racefree.i[47038,47051] [2022-07-19 21:20:13,486 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:20:13,546 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:20:13,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:13 WrapperNode [2022-07-19 21:20:13,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:20:13,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:20:13,550 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:20:13,550 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:20:13,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:13" (1/1) ... [2022-07-19 21:20:13,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:13" (1/1) ... [2022-07-19 21:20:13,599 INFO L137 Inliner]: procedures = 271, calls = 56, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 198 [2022-07-19 21:20:13,600 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:20:13,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:20:13,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:20:13,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:20:13,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:13" (1/1) ... [2022-07-19 21:20:13,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:13" (1/1) ... [2022-07-19 21:20:13,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:13" (1/1) ... [2022-07-19 21:20:13,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:13" (1/1) ... [2022-07-19 21:20:13,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:13" (1/1) ... [2022-07-19 21:20:13,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:13" (1/1) ... [2022-07-19 21:20:13,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:13" (1/1) ... [2022-07-19 21:20:13,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:20:13,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:20:13,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:20:13,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:20:13,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:13" (1/1) ... [2022-07-19 21:20:13,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:20:13,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:20:13,651 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 21:20:13,657 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 21:20:13,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:20:13,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:20:13,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:20:13,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:20:13,686 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-19 21:20:13,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:20:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-19 21:20:13,687 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-19 21:20:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:20:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:20:13,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:20:13,688 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 21:20:13,816 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:20:13,817 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:20:14,087 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:20:14,094 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:20:14,097 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2022-07-19 21:20:14,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:20:14 BoogieIcfgContainer [2022-07-19 21:20:14,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:20:14,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:20:14,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:20:14,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:20:14,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:20:12" (1/3) ... [2022-07-19 21:20:14,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a4a9d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:20:14, skipping insertion in model container [2022-07-19 21:20:14,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:20:13" (2/3) ... [2022-07-19 21:20:14,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a4a9d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:20:14, skipping insertion in model container [2022-07-19 21:20:14,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:20:14" (3/3) ... [2022-07-19 21:20:14,105 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_79-equ_racefree.i [2022-07-19 21:20:14,109 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:20:14,116 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:20:14,116 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-19 21:20:14,117 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:20:14,159 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-19 21:20:14,187 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 178 places, 203 transitions, 414 flow [2022-07-19 21:20:14,277 INFO L129 PetriNetUnfolder]: 42/275 cut-off events. [2022-07-19 21:20:14,278 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:20:14,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 275 events. 42/275 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 888 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 135. Up to 8 conditions per place. [2022-07-19 21:20:14,290 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 203 transitions, 414 flow [2022-07-19 21:20:14,301 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 198 transitions, 401 flow [2022-07-19 21:20:14,317 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:20:14,325 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@576b737b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2931b26d [2022-07-19 21:20:14,326 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:20:14,363 INFO L129 PetriNetUnfolder]: 14/163 cut-off events. [2022-07-19 21:20:14,365 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:20:14,366 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:14,366 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, 1] [2022-07-19 21:20:14,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-19 21:20:14,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:14,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1755706946, now seen corresponding path program 1 times [2022-07-19 21:20:14,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:14,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111382643] [2022-07-19 21:20:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:14,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:14,668 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 21:20:14,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:14,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111382643] [2022-07-19 21:20:14,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111382643] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:20:14,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:20:14,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:20:14,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129465971] [2022-07-19 21:20:14,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:20:14,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:20:14,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:14,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:20:14,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:20:14,732 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 203 [2022-07-19 21:20:14,737 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 198 transitions, 401 flow. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 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 21:20:14,737 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:14,738 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 203 [2022-07-19 21:20:14,739 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:14,794 INFO L129 PetriNetUnfolder]: 3/176 cut-off events. [2022-07-19 21:20:14,795 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:20:14,798 INFO L84 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 176 events. 3/176 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 296 event pairs, 0 based on Foata normal form. 40/209 useless extension candidates. Maximal degree in co-relation 114. Up to 6 conditions per place. [2022-07-19 21:20:14,799 INFO L132 encePairwiseOnDemand]: 176/203 looper letters, 8 selfloop transitions, 2 changer transitions 0/174 dead transitions. [2022-07-19 21:20:14,799 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 174 transitions, 373 flow [2022-07-19 21:20:14,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:20:14,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:20:14,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 551 transitions. [2022-07-19 21:20:14,813 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2022-07-19 21:20:14,813 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 551 transitions. [2022-07-19 21:20:14,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 551 transitions. [2022-07-19 21:20:14,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:14,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 551 transitions. [2022-07-19 21:20:14,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 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 21:20:14,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 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 21:20:14,829 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 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 21:20:14,831 INFO L186 Difference]: Start difference. First operand has 174 places, 198 transitions, 401 flow. Second operand 3 states and 551 transitions. [2022-07-19 21:20:14,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 174 transitions, 373 flow [2022-07-19 21:20:14,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 174 transitions, 373 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:20:14,838 INFO L242 Difference]: Finished difference. Result has 175 places, 172 transitions, 357 flow [2022-07-19 21:20:14,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=357, PETRI_PLACES=175, PETRI_TRANSITIONS=172} [2022-07-19 21:20:14,843 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 1 predicate places. [2022-07-19 21:20:14,844 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 172 transitions, 357 flow [2022-07-19 21:20:14,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 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 21:20:14,844 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:14,845 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] [2022-07-19 21:20:14,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:20:14,845 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-19 21:20:14,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:14,846 INFO L85 PathProgramCache]: Analyzing trace with hash 341960441, now seen corresponding path program 1 times [2022-07-19 21:20:14,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:14,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620019673] [2022-07-19 21:20:14,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:14,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:14,882 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:20:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:14,943 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:20:14,943 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:20:14,945 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-19 21:20:14,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-19 21:20:14,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-19 21:20:14,948 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-19 21:20:14,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:20:14,949 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-19 21:20:14,954 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:20:14,954 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:20:15,002 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:20:15,011 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 227 places, 263 transitions, 544 flow [2022-07-19 21:20:15,075 INFO L129 PetriNetUnfolder]: 71/432 cut-off events. [2022-07-19 21:20:15,076 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-19 21:20:15,080 INFO L84 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 432 events. 71/432 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1670 event pairs, 0 based on Foata normal form. 0/352 useless extension candidates. Maximal degree in co-relation 277. Up to 12 conditions per place. [2022-07-19 21:20:15,080 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 263 transitions, 544 flow [2022-07-19 21:20:15,086 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 227 places, 263 transitions, 544 flow [2022-07-19 21:20:15,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:20:15,093 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@576b737b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2931b26d [2022-07-19 21:20:15,094 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-19 21:20:15,107 INFO L129 PetriNetUnfolder]: 15/169 cut-off events. [2022-07-19 21:20:15,108 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:20:15,108 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:15,108 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, 1] [2022-07-19 21:20:15,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-19 21:20:15,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:15,109 INFO L85 PathProgramCache]: Analyzing trace with hash -985271127, now seen corresponding path program 1 times [2022-07-19 21:20:15,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:15,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53633270] [2022-07-19 21:20:15,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:15,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:15,212 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 21:20:15,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:15,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53633270] [2022-07-19 21:20:15,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53633270] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:20:15,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:20:15,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:20:15,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103190463] [2022-07-19 21:20:15,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:20:15,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:20:15,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:15,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:20:15,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:20:15,224 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 263 [2022-07-19 21:20:15,225 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 263 transitions, 544 flow. Second operand has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 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 21:20:15,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:15,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 263 [2022-07-19 21:20:15,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:15,313 INFO L129 PetriNetUnfolder]: 7/320 cut-off events. [2022-07-19 21:20:15,313 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-07-19 21:20:15,316 INFO L84 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 320 events. 7/320 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1017 event pairs, 0 based on Foata normal form. 127/432 useless extension candidates. Maximal degree in co-relation 203. Up to 16 conditions per place. [2022-07-19 21:20:15,317 INFO L132 encePairwiseOnDemand]: 225/263 looper letters, 13 selfloop transitions, 2 changer transitions 0/229 dead transitions. [2022-07-19 21:20:15,317 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 229 transitions, 506 flow [2022-07-19 21:20:15,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:20:15,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:20:15,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 705 transitions. [2022-07-19 21:20:15,323 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8935361216730038 [2022-07-19 21:20:15,323 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 705 transitions. [2022-07-19 21:20:15,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 705 transitions. [2022-07-19 21:20:15,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:15,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 705 transitions. [2022-07-19 21:20:15,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:20:15,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 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 21:20:15,332 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 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 21:20:15,332 INFO L186 Difference]: Start difference. First operand has 227 places, 263 transitions, 544 flow. Second operand 3 states and 705 transitions. [2022-07-19 21:20:15,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 229 transitions, 506 flow [2022-07-19 21:20:15,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 229 transitions, 506 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:20:15,342 INFO L242 Difference]: Finished difference. Result has 227 places, 226 transitions, 480 flow [2022-07-19 21:20:15,342 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=480, PETRI_PLACES=227, PETRI_TRANSITIONS=226} [2022-07-19 21:20:15,343 INFO L279 CegarLoopForPetriNet]: 227 programPoint places, 0 predicate places. [2022-07-19 21:20:15,343 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 226 transitions, 480 flow [2022-07-19 21:20:15,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 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 21:20:15,344 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:15,344 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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:15,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:20:15,345 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-19 21:20:15,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:15,346 INFO L85 PathProgramCache]: Analyzing trace with hash 699851186, now seen corresponding path program 1 times [2022-07-19 21:20:15,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:15,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995334380] [2022-07-19 21:20:15,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:15,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:15,843 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 21:20:15,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:15,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995334380] [2022-07-19 21:20:15,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995334380] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:20:15,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:20:15,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-19 21:20:15,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037141658] [2022-07-19 21:20:15,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:20:15,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 21:20:15,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:15,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 21:20:15,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-19 21:20:15,851 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 263 [2022-07-19 21:20:15,853 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 226 transitions, 480 flow. Second operand has 12 states, 12 states have (on average 142.66666666666666) internal successors, (1712), 12 states have internal predecessors, (1712), 0 states have call successors, (0), 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 21:20:15,853 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:15,853 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 263 [2022-07-19 21:20:15,853 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:20,823 INFO L129 PetriNetUnfolder]: 13877/34743 cut-off events. [2022-07-19 21:20:20,823 INFO L130 PetriNetUnfolder]: For 312/312 co-relation queries the response was YES. [2022-07-19 21:20:20,941 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56521 conditions, 34743 events. 13877/34743 cut-off events. For 312/312 co-relation queries the response was YES. Maximal size of possible extension queue 1337. Compared 421386 event pairs, 3273 based on Foata normal form. 0/33541 useless extension candidates. Maximal degree in co-relation 56403. Up to 9611 conditions per place. [2022-07-19 21:20:21,035 INFO L132 encePairwiseOnDemand]: 247/263 looper letters, 347 selfloop transitions, 45 changer transitions 127/659 dead transitions. [2022-07-19 21:20:21,035 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 659 transitions, 2448 flow [2022-07-19 21:20:21,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-19 21:20:21,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-19 21:20:21,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3998 transitions. [2022-07-19 21:20:21,046 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6080608365019011 [2022-07-19 21:20:21,046 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3998 transitions. [2022-07-19 21:20:21,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3998 transitions. [2022-07-19 21:20:21,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:21,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3998 transitions. [2022-07-19 21:20:21,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 159.92) internal successors, (3998), 25 states have internal predecessors, (3998), 0 states have call successors, (0), 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 21:20:21,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 263.0) internal successors, (6838), 26 states have internal predecessors, (6838), 0 states have call successors, (0), 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 21:20:21,071 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 263.0) internal successors, (6838), 26 states have internal predecessors, (6838), 0 states have call successors, (0), 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 21:20:21,071 INFO L186 Difference]: Start difference. First operand has 227 places, 226 transitions, 480 flow. Second operand 25 states and 3998 transitions. [2022-07-19 21:20:21,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 659 transitions, 2448 flow [2022-07-19 21:20:21,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 659 transitions, 2446 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:20:21,082 INFO L242 Difference]: Finished difference. Result has 261 places, 274 transitions, 777 flow [2022-07-19 21:20:21,083 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=777, PETRI_PLACES=261, PETRI_TRANSITIONS=274} [2022-07-19 21:20:21,084 INFO L279 CegarLoopForPetriNet]: 227 programPoint places, 34 predicate places. [2022-07-19 21:20:21,084 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 274 transitions, 777 flow [2022-07-19 21:20:21,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 142.66666666666666) internal successors, (1712), 12 states have internal predecessors, (1712), 0 states have call successors, (0), 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 21:20:21,086 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:21,086 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2022-07-19 21:20:21,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:20:21,086 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-19 21:20:21,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:21,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1556719885, now seen corresponding path program 1 times [2022-07-19 21:20:21,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:21,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499898886] [2022-07-19 21:20:21,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:21,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:21,130 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:20:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:20:21,167 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:20:21,168 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:20:21,168 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-19 21:20:21,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-19 21:20:21,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-19 21:20:21,169 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-19 21:20:21,170 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-19 21:20:21,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:20:21,170 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 21:20:21,171 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:20:21,171 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-19 21:20:21,269 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-19 21:20:21,272 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 276 places, 323 transitions, 676 flow [2022-07-19 21:20:21,347 INFO L129 PetriNetUnfolder]: 105/622 cut-off events. [2022-07-19 21:20:21,347 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-19 21:20:21,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 650 conditions, 622 events. 105/622 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2641 event pairs, 1 based on Foata normal form. 0/506 useless extension candidates. Maximal degree in co-relation 440. Up to 16 conditions per place. [2022-07-19 21:20:21,353 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 323 transitions, 676 flow [2022-07-19 21:20:21,359 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 276 places, 323 transitions, 676 flow [2022-07-19 21:20:21,360 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:20:21,361 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@576b737b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2931b26d [2022-07-19 21:20:21,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-19 21:20:21,369 INFO L129 PetriNetUnfolder]: 16/169 cut-off events. [2022-07-19 21:20:21,369 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:20:21,369 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:21,370 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, 1] [2022-07-19 21:20:21,370 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:20:21,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:21,370 INFO L85 PathProgramCache]: Analyzing trace with hash 645618892, now seen corresponding path program 1 times [2022-07-19 21:20:21,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:21,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239741149] [2022-07-19 21:20:21,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:21,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:21,417 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 21:20:21,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:21,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239741149] [2022-07-19 21:20:21,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239741149] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:20:21,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:20:21,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:20:21,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781765829] [2022-07-19 21:20:21,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:20:21,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:20:21,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:21,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:20:21,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:20:21,422 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 323 [2022-07-19 21:20:21,423 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 323 transitions, 676 flow. Second operand has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 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 21:20:21,423 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:21,423 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 323 [2022-07-19 21:20:21,423 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:20:21,501 INFO L129 PetriNetUnfolder]: 14/481 cut-off events. [2022-07-19 21:20:21,501 INFO L130 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-07-19 21:20:21,508 INFO L84 FinitePrefix]: Finished finitePrefix Result has 544 conditions, 481 events. 14/481 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1920 event pairs, 1 based on Foata normal form. 335/792 useless extension candidates. Maximal degree in co-relation 348. Up to 30 conditions per place. [2022-07-19 21:20:21,509 INFO L132 encePairwiseOnDemand]: 274/323 looper letters, 15 selfloop transitions, 2 changer transitions 0/277 dead transitions. [2022-07-19 21:20:21,509 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 277 transitions, 618 flow [2022-07-19 21:20:21,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:20:21,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:20:21,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 856 transitions. [2022-07-19 21:20:21,512 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8833849329205367 [2022-07-19 21:20:21,512 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 856 transitions. [2022-07-19 21:20:21,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 856 transitions. [2022-07-19 21:20:21,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:20:21,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 856 transitions. [2022-07-19 21:20:21,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 285.3333333333333) internal successors, (856), 3 states have internal predecessors, (856), 0 states have call successors, (0), 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 21:20:21,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 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 21:20:21,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 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 21:20:21,518 INFO L186 Difference]: Start difference. First operand has 276 places, 323 transitions, 676 flow. Second operand 3 states and 856 transitions. [2022-07-19 21:20:21,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 277 transitions, 618 flow [2022-07-19 21:20:21,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 277 transitions, 618 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:20:21,524 INFO L242 Difference]: Finished difference. Result has 275 places, 274 transitions, 588 flow [2022-07-19 21:20:21,524 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=588, PETRI_PLACES=275, PETRI_TRANSITIONS=274} [2022-07-19 21:20:21,525 INFO L279 CegarLoopForPetriNet]: 276 programPoint places, -1 predicate places. [2022-07-19 21:20:21,525 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 274 transitions, 588 flow [2022-07-19 21:20:21,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 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 21:20:21,526 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:20:21,526 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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:20:21,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:20:21,527 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:20:21,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:20:21,527 INFO L85 PathProgramCache]: Analyzing trace with hash 179903816, now seen corresponding path program 1 times [2022-07-19 21:20:21,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:20:21,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961027674] [2022-07-19 21:20:21,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:20:21,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:20:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:20:21,735 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 21:20:21,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:20:21,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961027674] [2022-07-19 21:20:21,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961027674] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:20:21,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:20:21,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-19 21:20:21,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791873783] [2022-07-19 21:20:21,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:20:21,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 21:20:21,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:20:21,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 21:20:21,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-19 21:20:21,740 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 323 [2022-07-19 21:20:21,742 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 274 transitions, 588 flow. Second operand has 12 states, 12 states have (on average 175.58333333333334) internal successors, (2107), 12 states have internal predecessors, (2107), 0 states have call successors, (0), 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 21:20:21,742 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:20:21,742 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 323 [2022-07-19 21:20:21,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand