./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/04_incdec_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/04_incdec_cas.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 a025fe4ca65874bde9a09e6a2d9fa9eceda581ed1bc5b23e0ff5285795ed115b --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:35:08,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:35:08,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:35:08,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:35:08,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:35:08,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:35:08,122 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:35:08,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:35:08,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:35:08,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:35:08,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:35:08,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:35:08,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:35:08,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:35:08,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:35:08,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:35:08,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:35:08,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:35:08,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:35:08,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:35:08,151 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:35:08,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:35:08,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:35:08,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:35:08,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:35:08,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:35:08,163 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:35:08,163 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:35:08,164 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:35:08,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:35:08,165 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:35:08,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:35:08,167 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:35:08,168 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:35:08,169 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:35:08,170 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:35:08,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:35:08,170 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:35:08,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:35:08,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:35:08,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:35:08,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:35:08,177 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:35:08,209 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:35:08,210 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:35:08,210 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:35:08,210 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:35:08,211 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:35:08,211 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:35:08,212 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:35:08,212 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:35:08,212 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:35:08,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:35:08,214 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:35:08,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:35:08,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:35:08,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:35:08,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:35:08,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:35:08,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:35:08,221 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:35:08,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:35:08,222 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:35:08,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:35:08,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:35:08,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:35:08,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:35:08,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:35:08,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:35:08,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:35:08,223 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:35:08,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:35:08,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:35:08,224 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:35:08,224 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:35:08,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:35:08,225 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a025fe4ca65874bde9a09e6a2d9fa9eceda581ed1bc5b23e0ff5285795ed115b [2022-07-21 08:35:08,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:35:08,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:35:08,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:35:08,544 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:35:08,545 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:35:08,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2022-07-21 08:35:08,595 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0cc6caa6/3eeef06116d244679efebb1b4d8d889e/FLAGe47395763 [2022-07-21 08:35:09,048 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:35:09,049 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2022-07-21 08:35:09,061 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0cc6caa6/3eeef06116d244679efebb1b4d8d889e/FLAGe47395763 [2022-07-21 08:35:09,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0cc6caa6/3eeef06116d244679efebb1b4d8d889e [2022-07-21 08:35:09,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:35:09,413 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:35:09,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:35:09,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:35:09,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:35:09,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:35:09" (1/1) ... [2022-07-21 08:35:09,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ded134b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:09, skipping insertion in model container [2022-07-21 08:35:09,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:35:09" (1/1) ... [2022-07-21 08:35:09,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:35:09,476 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:35:09,759 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30285,30298] [2022-07-21 08:35:09,768 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30729,30742] [2022-07-21 08:35:09,776 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:35:09,793 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:35:09,827 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30285,30298] [2022-07-21 08:35:09,830 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30729,30742] [2022-07-21 08:35:09,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:35:09,880 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:35:09,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:09 WrapperNode [2022-07-21 08:35:09,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:35:09,882 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:35:09,882 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:35:09,882 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:35:09,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:09" (1/1) ... [2022-07-21 08:35:09,917 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:09" (1/1) ... [2022-07-21 08:35:09,946 INFO L137 Inliner]: procedures = 172, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 158 [2022-07-21 08:35:09,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:35:09,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:35:09,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:35:09,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:35:09,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:09" (1/1) ... [2022-07-21 08:35:09,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:09" (1/1) ... [2022-07-21 08:35:09,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:09" (1/1) ... [2022-07-21 08:35:09,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:09" (1/1) ... [2022-07-21 08:35:09,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:09" (1/1) ... [2022-07-21 08:35:09,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:09" (1/1) ... [2022-07-21 08:35:09,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:09" (1/1) ... [2022-07-21 08:35:09,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:35:09,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:35:09,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:35:09,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:35:09,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:09" (1/1) ... [2022-07-21 08:35:09,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:35:10,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:35:10,020 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) [2022-07-21 08:35:10,052 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 [2022-07-21 08:35:10,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:35:10,067 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-21 08:35:10,068 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-21 08:35:10,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:35:10,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:35:10,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:35:10,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:35:10,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:35:10,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:35:10,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:35:10,071 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:35:10,191 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:35:10,195 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:35:10,404 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:35:10,626 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:35:10,627 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 08:35:10,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:35:10 BoogieIcfgContainer [2022-07-21 08:35:10,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:35:10,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:35:10,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:35:10,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:35:10,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:35:09" (1/3) ... [2022-07-21 08:35:10,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f8cda28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:35:10, skipping insertion in model container [2022-07-21 08:35:10,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:09" (2/3) ... [2022-07-21 08:35:10,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f8cda28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:35:10, skipping insertion in model container [2022-07-21 08:35:10,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:35:10" (3/3) ... [2022-07-21 08:35:10,635 INFO L111 eAbstractionObserver]: Analyzing ICFG 04_incdec_cas.i [2022-07-21 08:35:10,639 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:35:10,646 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:35:10,647 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 08:35:10,647 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:35:10,700 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:35:10,734 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 105 transitions, 215 flow [2022-07-21 08:35:10,776 INFO L129 PetriNetUnfolder]: 9/116 cut-off events. [2022-07-21 08:35:10,776 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:35:10,781 INFO L84 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 116 events. 9/116 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 238 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2022-07-21 08:35:10,781 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 105 transitions, 215 flow [2022-07-21 08:35:10,785 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 105 transitions, 215 flow [2022-07-21 08:35:10,792 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:35:10,797 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@71ba72ee, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@52dd3dc6 [2022-07-21 08:35:10,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-21 08:35:10,808 INFO L129 PetriNetUnfolder]: 2/55 cut-off events. [2022-07-21 08:35:10,808 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:35:10,808 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:35:10,809 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] [2022-07-21 08:35:10,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 08:35:10,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:35:10,813 INFO L85 PathProgramCache]: Analyzing trace with hash -618762747, now seen corresponding path program 1 times [2022-07-21 08:35:10,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:35:10,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954124164] [2022-07-21 08:35:10,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:10,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:35:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:35:10,941 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:35:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:35:11,005 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:35:11,007 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:35:11,008 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-21 08:35:11,009 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-21 08:35:11,010 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-21 08:35:11,010 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-21 08:35:11,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-21 08:35:11,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:35:11,012 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-21 08:35:11,018 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:35:11,018 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-21 08:35:11,123 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:35:11,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 164 places, 174 transitions, 360 flow [2022-07-21 08:35:11,198 INFO L129 PetriNetUnfolder]: 17/198 cut-off events. [2022-07-21 08:35:11,198 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:35:11,205 INFO L84 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 198 events. 17/198 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 641 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 149. Up to 6 conditions per place. [2022-07-21 08:35:11,205 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 174 transitions, 360 flow [2022-07-21 08:35:11,209 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 174 transitions, 360 flow [2022-07-21 08:35:11,210 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:35:11,212 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@71ba72ee, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@52dd3dc6 [2022-07-21 08:35:11,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-21 08:35:11,241 INFO L129 PetriNetUnfolder]: 3/86 cut-off events. [2022-07-21 08:35:11,241 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:35:11,242 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:35:11,242 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] [2022-07-21 08:35:11,242 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:35:11,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:35:11,243 INFO L85 PathProgramCache]: Analyzing trace with hash -444542195, now seen corresponding path program 1 times [2022-07-21 08:35:11,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:35:11,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834804524] [2022-07-21 08:35:11,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:11,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:35:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:35:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:35:11,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:35:11,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834804524] [2022-07-21 08:35:11,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834804524] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:35:11,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:35:11,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:35:11,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630799827] [2022-07-21 08:35:11,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:35:11,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:35:11,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:35:11,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:35:11,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:35:11,379 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 174 [2022-07-21 08:35:11,382 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 174 transitions, 360 flow. Second operand has 2 states, 2 states have (on average 155.5) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:11,383 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:35:11,383 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 174 [2022-07-21 08:35:11,384 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:35:11,536 INFO L129 PetriNetUnfolder]: 82/659 cut-off events. [2022-07-21 08:35:11,536 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-07-21 08:35:11,539 INFO L84 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 659 events. 82/659 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4394 event pairs, 42 based on Foata normal form. 85/672 useless extension candidates. Maximal degree in co-relation 150. Up to 99 conditions per place. [2022-07-21 08:35:11,542 INFO L132 encePairwiseOnDemand]: 168/174 looper letters, 14 selfloop transitions, 0 changer transitions 0/163 dead transitions. [2022-07-21 08:35:11,542 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 163 transitions, 366 flow [2022-07-21 08:35:11,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:35:11,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:35:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 328 transitions. [2022-07-21 08:35:11,556 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9425287356321839 [2022-07-21 08:35:11,557 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 328 transitions. [2022-07-21 08:35:11,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 328 transitions. [2022-07-21 08:35:11,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:35:11,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 328 transitions. [2022-07-21 08:35:11,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 164.0) internal successors, (328), 2 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:11,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:11,568 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:11,570 INFO L186 Difference]: Start difference. First operand has 164 places, 174 transitions, 360 flow. Second operand 2 states and 328 transitions. [2022-07-21 08:35:11,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 163 transitions, 366 flow [2022-07-21 08:35:11,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 163 transitions, 364 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-21 08:35:11,577 INFO L242 Difference]: Finished difference. Result has 159 places, 163 transitions, 336 flow [2022-07-21 08:35:11,579 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=336, PETRI_PLACES=159, PETRI_TRANSITIONS=163} [2022-07-21 08:35:11,581 INFO L279 CegarLoopForPetriNet]: 164 programPoint places, -5 predicate places. [2022-07-21 08:35:11,582 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 163 transitions, 336 flow [2022-07-21 08:35:11,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 155.5) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:11,582 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:35:11,583 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:35:11,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:35:11,583 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:35:11,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:35:11,584 INFO L85 PathProgramCache]: Analyzing trace with hash -983549349, now seen corresponding path program 1 times [2022-07-21 08:35:11,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:35:11,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321135859] [2022-07-21 08:35:11,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:11,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:35:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:35:11,604 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:35:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:35:11,624 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:35:11,626 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:35:11,626 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-07-21 08:35:11,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-21 08:35:11,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-21 08:35:11,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-21 08:35:11,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-07-21 08:35:11,628 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-21 08:35:11,628 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-21 08:35:11,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:35:11,628 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-21 08:35:11,629 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:35:11,629 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-21 08:35:11,706 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:35:11,709 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 228 places, 243 transitions, 507 flow [2022-07-21 08:35:11,747 INFO L129 PetriNetUnfolder]: 25/280 cut-off events. [2022-07-21 08:35:11,754 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 08:35:11,757 INFO L84 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 280 events. 25/280 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1092 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 217. Up to 8 conditions per place. [2022-07-21 08:35:11,757 INFO L82 GeneralOperation]: Start removeDead. Operand has 228 places, 243 transitions, 507 flow [2022-07-21 08:35:11,762 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 243 transitions, 507 flow [2022-07-21 08:35:11,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:35:11,764 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@71ba72ee, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@52dd3dc6 [2022-07-21 08:35:11,764 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-07-21 08:35:11,771 INFO L129 PetriNetUnfolder]: 3/90 cut-off events. [2022-07-21 08:35:11,771 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 08:35:11,771 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:35:11,771 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] [2022-07-21 08:35:11,771 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-21 08:35:11,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:35:11,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1968246583, now seen corresponding path program 1 times [2022-07-21 08:35:11,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:35:11,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881989990] [2022-07-21 08:35:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:11,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:35:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:35:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:35:11,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:35:11,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881989990] [2022-07-21 08:35:11,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881989990] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:35:11,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:35:11,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:35:11,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340466341] [2022-07-21 08:35:11,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:35:11,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:35:11,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:35:11,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:35:11,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:35:11,806 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 243 [2022-07-21 08:35:11,807 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 243 transitions, 507 flow. Second operand has 2 states, 2 states have (on average 215.5) internal successors, (431), 2 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:11,807 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:35:11,807 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 243 [2022-07-21 08:35:11,807 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:35:12,600 INFO L129 PetriNetUnfolder]: 915/4866 cut-off events. [2022-07-21 08:35:12,601 INFO L130 PetriNetUnfolder]: For 463/463 co-relation queries the response was YES. [2022-07-21 08:35:12,630 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6266 conditions, 4866 events. 915/4866 cut-off events. For 463/463 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 53404 event pairs, 630 based on Foata normal form. 708/4947 useless extension candidates. Maximal degree in co-relation 789. Up to 1030 conditions per place. [2022-07-21 08:35:12,658 INFO L132 encePairwiseOnDemand]: 235/243 looper letters, 21 selfloop transitions, 0 changer transitions 0/230 dead transitions. [2022-07-21 08:35:12,658 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 230 transitions, 523 flow [2022-07-21 08:35:12,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:35:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:35:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 457 transitions. [2022-07-21 08:35:12,664 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9403292181069959 [2022-07-21 08:35:12,664 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 457 transitions. [2022-07-21 08:35:12,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 457 transitions. [2022-07-21 08:35:12,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:35:12,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 457 transitions. [2022-07-21 08:35:12,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 228.5) internal successors, (457), 2 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:12,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:12,671 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:12,671 INFO L186 Difference]: Start difference. First operand has 228 places, 243 transitions, 507 flow. Second operand 2 states and 457 transitions. [2022-07-21 08:35:12,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 230 transitions, 523 flow [2022-07-21 08:35:12,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 230 transitions, 517 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-21 08:35:12,686 INFO L242 Difference]: Finished difference. Result has 223 places, 230 transitions, 475 flow [2022-07-21 08:35:12,687 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=475, PETRI_PLACES=223, PETRI_TRANSITIONS=230} [2022-07-21 08:35:12,688 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, -5 predicate places. [2022-07-21 08:35:12,688 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 230 transitions, 475 flow [2022-07-21 08:35:12,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 215.5) internal successors, (431), 2 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:12,689 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:35:12,689 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:35:12,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:35:12,690 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-21 08:35:12,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:35:12,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1044587364, now seen corresponding path program 1 times [2022-07-21 08:35:12,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:35:12,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156312777] [2022-07-21 08:35:12,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:12,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:35:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:35:12,751 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:35:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:35:12,776 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:35:12,777 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:35:12,777 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2022-07-21 08:35:12,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2022-07-21 08:35:12,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2022-07-21 08:35:12,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2022-07-21 08:35:12,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2022-07-21 08:35:12,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2022-07-21 08:35:12,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2022-07-21 08:35:12,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2022-07-21 08:35:12,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2022-07-21 08:35:12,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:35:12,779 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-21 08:35:12,780 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:35:12,780 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-21 08:35:12,851 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-21 08:35:12,854 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 292 places, 312 transitions, 656 flow [2022-07-21 08:35:12,899 INFO L129 PetriNetUnfolder]: 33/362 cut-off events. [2022-07-21 08:35:12,900 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-21 08:35:12,905 INFO L84 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 362 events. 33/362 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1531 event pairs, 0 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 288. Up to 10 conditions per place. [2022-07-21 08:35:12,905 INFO L82 GeneralOperation]: Start removeDead. Operand has 292 places, 312 transitions, 656 flow [2022-07-21 08:35:12,909 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 292 places, 312 transitions, 656 flow [2022-07-21 08:35:12,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:35:12,911 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@71ba72ee, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@52dd3dc6 [2022-07-21 08:35:12,911 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-07-21 08:35:12,917 INFO L129 PetriNetUnfolder]: 3/89 cut-off events. [2022-07-21 08:35:12,917 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:35:12,917 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:35:12,917 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] [2022-07-21 08:35:12,918 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2022-07-21 08:35:12,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:35:12,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1795008533, now seen corresponding path program 1 times [2022-07-21 08:35:12,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:35:12,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436432021] [2022-07-21 08:35:12,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:12,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:35:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:35:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:35:12,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:35:12,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436432021] [2022-07-21 08:35:12,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436432021] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:35:12,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:35:12,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:35:12,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510500961] [2022-07-21 08:35:12,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:35:12,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:35:12,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:35:12,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:35:12,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:35:12,947 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 312 [2022-07-21 08:35:12,948 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 312 transitions, 656 flow. Second operand has 2 states, 2 states have (on average 275.5) internal successors, (551), 2 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) [2022-07-21 08:35:12,948 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:35:12,948 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 312 [2022-07-21 08:35:12,948 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:35:18,629 INFO L129 PetriNetUnfolder]: 8804/36373 cut-off events. [2022-07-21 08:35:18,630 INFO L130 PetriNetUnfolder]: For 5804/5804 co-relation queries the response was YES. [2022-07-21 08:35:18,925 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49289 conditions, 36373 events. 8804/36373 cut-off events. For 5804/5804 co-relation queries the response was YES. Maximal size of possible extension queue 1592. Compared 531338 event pairs, 6804 based on Foata normal form. 5755/36930 useless extension candidates. Maximal degree in co-relation 6347. Up to 9605 conditions per place. [2022-07-21 08:35:19,193 INFO L132 encePairwiseOnDemand]: 302/312 looper letters, 28 selfloop transitions, 0 changer transitions 0/297 dead transitions. [2022-07-21 08:35:19,193 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 297 transitions, 682 flow [2022-07-21 08:35:19,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:35:19,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:35:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 586 transitions. [2022-07-21 08:35:19,196 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9391025641025641 [2022-07-21 08:35:19,196 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 586 transitions. [2022-07-21 08:35:19,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 586 transitions. [2022-07-21 08:35:19,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:35:19,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 586 transitions. [2022-07-21 08:35:19,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 293.0) internal successors, (586), 2 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:19,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 312.0) internal successors, (936), 3 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:19,201 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 312.0) internal successors, (936), 3 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:19,201 INFO L186 Difference]: Start difference. First operand has 292 places, 312 transitions, 656 flow. Second operand 2 states and 586 transitions. [2022-07-21 08:35:19,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 297 transitions, 682 flow [2022-07-21 08:35:19,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 297 transitions, 670 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-21 08:35:19,215 INFO L242 Difference]: Finished difference. Result has 287 places, 297 transitions, 614 flow [2022-07-21 08:35:19,216 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=312, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=614, PETRI_PLACES=287, PETRI_TRANSITIONS=297} [2022-07-21 08:35:19,219 INFO L279 CegarLoopForPetriNet]: 292 programPoint places, -5 predicate places. [2022-07-21 08:35:19,219 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 297 transitions, 614 flow [2022-07-21 08:35:19,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 275.5) internal successors, (551), 2 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) [2022-07-21 08:35:19,220 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:35:19,220 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] [2022-07-21 08:35:19,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 08:35:19,223 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2022-07-21 08:35:19,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:35:19,223 INFO L85 PathProgramCache]: Analyzing trace with hash -551703534, now seen corresponding path program 1 times [2022-07-21 08:35:19,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:35:19,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121919927] [2022-07-21 08:35:19,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:19,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:35:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:35:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:35:19,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:35:19,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121919927] [2022-07-21 08:35:19,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121919927] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:35:19,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:35:19,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-21 08:35:19,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949643293] [2022-07-21 08:35:19,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:35:19,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 08:35:19,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:35:19,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 08:35:19,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-21 08:35:19,716 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 312 [2022-07-21 08:35:19,719 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 297 transitions, 614 flow. Second operand has 14 states, 14 states have (on average 204.14285714285714) internal successors, (2858), 14 states have internal predecessors, (2858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:35:19,719 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:35:19,722 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 312 [2022-07-21 08:35:19,722 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand