./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.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/goblint-regression/28-race_reach_20-callback_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 4e91816f101a416d37c086dd7185cfb4e2bfa63eb286e4a418cb94db27cf2f6f --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:50:55,752 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:50:55,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:50:55,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:50:55,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:50:55,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:50:55,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:50:55,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:50:55,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:50:55,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:50:55,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:50:55,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:50:55,832 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:50:55,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:50:55,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:50:55,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:50:55,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:50:55,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:50:55,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:50:55,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:50:55,845 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:50:55,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:50:55,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:50:55,848 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:50:55,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:50:55,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:50:55,868 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:50:55,868 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:50:55,869 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:50:55,869 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:50:55,870 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:50:55,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:50:55,872 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:50:55,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:50:55,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:50:55,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:50:55,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:50:55,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:50:55,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:50:55,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:50:55,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:50:55,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:50:55,876 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:50:55,904 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:50:55,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:50:55,905 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:50:55,905 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:50:55,906 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:50:55,906 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:50:55,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:50:55,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:50:55,907 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:50:55,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:50:55,908 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:50:55,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:50:55,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:50:55,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:50:55,909 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:50:55,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:50:55,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:50:55,909 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:50:55,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:50:55,909 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:50:55,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:50:55,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:50:55,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:50:55,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:50:55,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:50:55,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:50:55,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:50:55,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:50:55,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:50:55,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:50:55,911 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:50:55,911 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:50:55,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:50:55,912 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e91816f101a416d37c086dd7185cfb4e2bfa63eb286e4a418cb94db27cf2f6f [2022-07-21 08:50:56,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:50:56,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:50:56,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:50:56,189 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:50:56,189 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:50:56,190 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i [2022-07-21 08:50:56,231 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5caadc671/a2b598fa175a4b608feda87f217b08da/FLAGaf4a96987 [2022-07-21 08:50:56,646 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:50:56,647 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i [2022-07-21 08:50:56,657 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5caadc671/a2b598fa175a4b608feda87f217b08da/FLAGaf4a96987 [2022-07-21 08:50:56,670 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5caadc671/a2b598fa175a4b608feda87f217b08da [2022-07-21 08:50:56,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:50:56,673 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:50:56,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:50:56,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:50:56,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:50:56,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:50:56" (1/1) ... [2022-07-21 08:50:56,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c7510fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:56, skipping insertion in model container [2022-07-21 08:50:56,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:50:56" (1/1) ... [2022-07-21 08:50:56,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:50:56,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:50:56,939 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_20-callback_racefree.i[30212,30225] [2022-07-21 08:50:56,957 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:50:56,964 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:50:56,986 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_20-callback_racefree.i[30212,30225] [2022-07-21 08:50:57,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:50:57,030 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:50:57,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:57 WrapperNode [2022-07-21 08:50:57,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:50:57,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:50:57,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:50:57,032 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:50:57,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:57" (1/1) ... [2022-07-21 08:50:57,061 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:57" (1/1) ... [2022-07-21 08:50:57,089 INFO L137 Inliner]: procedures = 173, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 134 [2022-07-21 08:50:57,090 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:50:57,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:50:57,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:50:57,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:50:57,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:57" (1/1) ... [2022-07-21 08:50:57,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:57" (1/1) ... [2022-07-21 08:50:57,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:57" (1/1) ... [2022-07-21 08:50:57,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:57" (1/1) ... [2022-07-21 08:50:57,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:57" (1/1) ... [2022-07-21 08:50:57,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:57" (1/1) ... [2022-07-21 08:50:57,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:57" (1/1) ... [2022-07-21 08:50:57,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:50:57,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:50:57,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:50:57,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:50:57,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:57" (1/1) ... [2022-07-21 08:50:57,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:50:57,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:50:57,146 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 08:50:57,148 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 08:50:57,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:50:57,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:50:57,171 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-21 08:50:57,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:50:57,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:50:57,171 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-21 08:50:57,171 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-21 08:50:57,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:50:57,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:50:57,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:50:57,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:50:57,180 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 08:50:57,254 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:50:57,255 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:50:57,427 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:50:57,433 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:50:57,434 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-07-21 08:50:57,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:50:57 BoogieIcfgContainer [2022-07-21 08:50:57,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:50:57,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:50:57,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:50:57,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:50:57,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:50:56" (1/3) ... [2022-07-21 08:50:57,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67361d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:50:57, skipping insertion in model container [2022-07-21 08:50:57,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:57" (2/3) ... [2022-07-21 08:50:57,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67361d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:50:57, skipping insertion in model container [2022-07-21 08:50:57,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:50:57" (3/3) ... [2022-07-21 08:50:57,442 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_20-callback_racefree.i [2022-07-21 08:50:57,445 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:50:57,452 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:50:57,453 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:50:57,453 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:50:57,481 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-21 08:50:57,505 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 136 places, 148 transitions, 304 flow [2022-07-21 08:50:57,590 INFO L129 PetriNetUnfolder]: 26/224 cut-off events. [2022-07-21 08:50:57,591 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:50:57,595 INFO L84 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 224 events. 26/224 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 586 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 114. Up to 6 conditions per place. [2022-07-21 08:50:57,595 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 148 transitions, 304 flow [2022-07-21 08:50:57,601 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 143 transitions, 291 flow [2022-07-21 08:50:57,613 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:50:57,620 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@6917fcf8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@320534ca [2022-07-21 08:50:57,620 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 08:50:57,640 INFO L129 PetriNetUnfolder]: 5/103 cut-off events. [2022-07-21 08:50:57,642 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:50:57,643 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:57,643 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] [2022-07-21 08:50:57,644 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 08:50:57,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:57,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1123183307, now seen corresponding path program 1 times [2022-07-21 08:50:57,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:57,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938477713] [2022-07-21 08:50:57,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:57,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:57,780 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:50:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:57,838 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:50:57,839 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:50:57,840 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-21 08:50:57,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-21 08:50:57,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-21 08:50:57,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:50:57,843 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-21 08:50:57,847 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:50:57,847 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-21 08:50:57,867 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 08:50:57,871 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 158 places, 172 transitions, 362 flow [2022-07-21 08:50:57,938 INFO L129 PetriNetUnfolder]: 43/349 cut-off events. [2022-07-21 08:50:57,938 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-21 08:50:57,942 INFO L84 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 349 events. 43/349 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1224 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 226. Up to 9 conditions per place. [2022-07-21 08:50:57,942 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 172 transitions, 362 flow [2022-07-21 08:50:57,947 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 172 transitions, 362 flow [2022-07-21 08:50:57,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:50:57,950 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@6917fcf8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@320534ca [2022-07-21 08:50:57,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 08:50:57,958 INFO L129 PetriNetUnfolder]: 6/113 cut-off events. [2022-07-21 08:50:57,958 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:50:57,959 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:57,959 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:57,959 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-21 08:50:57,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:57,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1139599209, now seen corresponding path program 1 times [2022-07-21 08:50:57,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:57,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737737942] [2022-07-21 08:50:57,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:57,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:58,184 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 08:50:58,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:58,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737737942] [2022-07-21 08:50:58,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737737942] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:58,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:58,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:50:58,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583987403] [2022-07-21 08:50:58,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:58,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:50:58,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:58,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:50:58,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:50:58,253 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 172 [2022-07-21 08:50:58,261 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 172 transitions, 362 flow. Second operand has 5 states, 5 states have (on average 141.2) internal successors, (706), 5 states have internal predecessors, (706), 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 08:50:58,261 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:58,261 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 172 [2022-07-21 08:50:58,262 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:58,590 INFO L129 PetriNetUnfolder]: 222/1850 cut-off events. [2022-07-21 08:50:58,590 INFO L130 PetriNetUnfolder]: For 136/164 co-relation queries the response was YES. [2022-07-21 08:50:58,596 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2279 conditions, 1850 events. 222/1850 cut-off events. For 136/164 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 13968 event pairs, 55 based on Foata normal form. 476/2200 useless extension candidates. Maximal degree in co-relation 862. Up to 146 conditions per place. [2022-07-21 08:50:58,602 INFO L132 encePairwiseOnDemand]: 151/172 looper letters, 43 selfloop transitions, 8 changer transitions 5/196 dead transitions. [2022-07-21 08:50:58,602 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 196 transitions, 556 flow [2022-07-21 08:50:58,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 08:50:58,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 08:50:58,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1252 transitions. [2022-07-21 08:50:58,622 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9098837209302325 [2022-07-21 08:50:58,623 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1252 transitions. [2022-07-21 08:50:58,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1252 transitions. [2022-07-21 08:50:58,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:58,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1252 transitions. [2022-07-21 08:50:58,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 156.5) internal successors, (1252), 8 states have internal predecessors, (1252), 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 08:50:58,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 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 08:50:58,649 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 172.0) internal successors, (1548), 9 states have internal predecessors, (1548), 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 08:50:58,651 INFO L186 Difference]: Start difference. First operand has 158 places, 172 transitions, 362 flow. Second operand 8 states and 1252 transitions. [2022-07-21 08:50:58,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 196 transitions, 556 flow [2022-07-21 08:50:58,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 196 transitions, 556 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:58,661 INFO L242 Difference]: Finished difference. Result has 168 places, 162 transitions, 387 flow [2022-07-21 08:50:58,663 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=387, PETRI_PLACES=168, PETRI_TRANSITIONS=162} [2022-07-21 08:50:58,671 INFO L279 CegarLoopForPetriNet]: 158 programPoint places, 10 predicate places. [2022-07-21 08:50:58,671 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 162 transitions, 387 flow [2022-07-21 08:50:58,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.2) internal successors, (706), 5 states have internal predecessors, (706), 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 08:50:58,672 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:58,672 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] [2022-07-21 08:50:58,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:50:58,673 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-21 08:50:58,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:58,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1898508243, now seen corresponding path program 1 times [2022-07-21 08:50:58,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:58,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071530628] [2022-07-21 08:50:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:58,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:58,717 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:50:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:50:58,741 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:50:58,742 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:50:58,742 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-21 08:50:58,745 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-21 08:50:58,745 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-21 08:50:58,745 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-21 08:50:58,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:50:58,745 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-21 08:50:58,746 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:50:58,746 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-21 08:50:58,775 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-21 08:50:58,778 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 180 places, 196 transitions, 422 flow [2022-07-21 08:50:58,829 INFO L129 PetriNetUnfolder]: 65/507 cut-off events. [2022-07-21 08:50:58,829 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-21 08:50:58,832 INFO L84 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 507 events. 65/507 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2023 event pairs, 1 based on Foata normal form. 0/435 useless extension candidates. Maximal degree in co-relation 357. Up to 16 conditions per place. [2022-07-21 08:50:58,832 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 196 transitions, 422 flow [2022-07-21 08:50:58,837 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 196 transitions, 422 flow [2022-07-21 08:50:58,838 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:50:58,840 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@6917fcf8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@320534ca [2022-07-21 08:50:58,840 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-21 08:50:58,849 INFO L129 PetriNetUnfolder]: 6/111 cut-off events. [2022-07-21 08:50:58,849 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:50:58,849 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:58,849 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:50:58,850 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-21 08:50:58,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:58,850 INFO L85 PathProgramCache]: Analyzing trace with hash 681633727, now seen corresponding path program 1 times [2022-07-21 08:50:58,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:58,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059052579] [2022-07-21 08:50:58,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:58,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:58,947 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 08:50:58,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:58,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059052579] [2022-07-21 08:50:58,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059052579] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:58,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:58,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:50:58,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468283042] [2022-07-21 08:50:58,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:58,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:50:58,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:58,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:50:58,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:50:58,965 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 196 [2022-07-21 08:50:58,965 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 196 transitions, 422 flow. Second operand has 5 states, 5 states have (on average 158.2) internal successors, (791), 5 states have internal predecessors, (791), 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 08:50:58,966 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:58,966 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 196 [2022-07-21 08:50:58,966 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:50:59,500 INFO L129 PetriNetUnfolder]: 749/4671 cut-off events. [2022-07-21 08:50:59,500 INFO L130 PetriNetUnfolder]: For 512/590 co-relation queries the response was YES. [2022-07-21 08:50:59,513 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6022 conditions, 4671 events. 749/4671 cut-off events. For 512/590 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 44513 event pairs, 150 based on Foata normal form. 1634/5976 useless extension candidates. Maximal degree in co-relation 2229. Up to 425 conditions per place. [2022-07-21 08:50:59,529 INFO L132 encePairwiseOnDemand]: 172/196 looper letters, 65 selfloop transitions, 8 changer transitions 0/230 dead transitions. [2022-07-21 08:50:59,530 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 230 transitions, 702 flow [2022-07-21 08:50:59,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 08:50:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 08:50:59,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1426 transitions. [2022-07-21 08:50:59,535 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9094387755102041 [2022-07-21 08:50:59,535 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1426 transitions. [2022-07-21 08:50:59,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1426 transitions. [2022-07-21 08:50:59,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:50:59,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1426 transitions. [2022-07-21 08:50:59,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 178.25) internal successors, (1426), 8 states have internal predecessors, (1426), 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 08:50:59,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 196.0) internal successors, (1764), 9 states have internal predecessors, (1764), 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 08:50:59,541 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 196.0) internal successors, (1764), 9 states have internal predecessors, (1764), 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 08:50:59,541 INFO L186 Difference]: Start difference. First operand has 180 places, 196 transitions, 422 flow. Second operand 8 states and 1426 transitions. [2022-07-21 08:50:59,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 230 transitions, 702 flow [2022-07-21 08:50:59,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 230 transitions, 702 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:50:59,549 INFO L242 Difference]: Finished difference. Result has 189 places, 182 transitions, 439 flow [2022-07-21 08:50:59,550 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=439, PETRI_PLACES=189, PETRI_TRANSITIONS=182} [2022-07-21 08:50:59,551 INFO L279 CegarLoopForPetriNet]: 180 programPoint places, 9 predicate places. [2022-07-21 08:50:59,551 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 182 transitions, 439 flow [2022-07-21 08:50:59,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 158.2) internal successors, (791), 5 states have internal predecessors, (791), 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 08:50:59,552 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:50:59,552 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] [2022-07-21 08:50:59,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:50:59,552 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-21 08:50:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:50:59,553 INFO L85 PathProgramCache]: Analyzing trace with hash 2063890061, now seen corresponding path program 1 times [2022-07-21 08:50:59,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:50:59,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420822031] [2022-07-21 08:50:59,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:50:59,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:50:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:50:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:50:59,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:50:59,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420822031] [2022-07-21 08:50:59,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420822031] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:50:59,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:50:59,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:50:59,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639569435] [2022-07-21 08:50:59,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:50:59,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:50:59,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:50:59,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:50:59,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:50:59,665 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 196 [2022-07-21 08:50:59,666 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 182 transitions, 439 flow. Second operand has 5 states, 5 states have (on average 158.4) internal successors, (792), 5 states have internal predecessors, (792), 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 08:50:59,666 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:50:59,666 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 196 [2022-07-21 08:50:59,666 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:00,526 INFO L129 PetriNetUnfolder]: 1235/8063 cut-off events. [2022-07-21 08:51:00,527 INFO L130 PetriNetUnfolder]: For 2034/2202 co-relation queries the response was YES. [2022-07-21 08:51:00,562 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11386 conditions, 8063 events. 1235/8063 cut-off events. For 2034/2202 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 88273 event pairs, 360 based on Foata normal form. 27/7516 useless extension candidates. Maximal degree in co-relation 8062. Up to 850 conditions per place. [2022-07-21 08:51:00,622 INFO L132 encePairwiseOnDemand]: 190/196 looper letters, 61 selfloop transitions, 14 changer transitions 2/237 dead transitions. [2022-07-21 08:51:00,622 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 237 transitions, 813 flow [2022-07-21 08:51:00,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 08:51:00,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 08:51:00,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1329 transitions. [2022-07-21 08:51:00,626 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8475765306122449 [2022-07-21 08:51:00,626 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1329 transitions. [2022-07-21 08:51:00,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1329 transitions. [2022-07-21 08:51:00,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:00,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1329 transitions. [2022-07-21 08:51:00,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 166.125) internal successors, (1329), 8 states have internal predecessors, (1329), 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 08:51:00,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 196.0) internal successors, (1764), 9 states have internal predecessors, (1764), 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 08:51:00,635 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 196.0) internal successors, (1764), 9 states have internal predecessors, (1764), 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 08:51:00,635 INFO L186 Difference]: Start difference. First operand has 189 places, 182 transitions, 439 flow. Second operand 8 states and 1329 transitions. [2022-07-21 08:51:00,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 237 transitions, 813 flow [2022-07-21 08:51:00,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 237 transitions, 813 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:00,646 INFO L242 Difference]: Finished difference. Result has 200 places, 192 transitions, 537 flow [2022-07-21 08:51:00,647 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=537, PETRI_PLACES=200, PETRI_TRANSITIONS=192} [2022-07-21 08:51:00,648 INFO L279 CegarLoopForPetriNet]: 180 programPoint places, 20 predicate places. [2022-07-21 08:51:00,648 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 192 transitions, 537 flow [2022-07-21 08:51:00,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 158.4) internal successors, (792), 5 states have internal predecessors, (792), 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 08:51:00,649 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:00,649 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:00,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:51:00,650 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-21 08:51:00,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:00,650 INFO L85 PathProgramCache]: Analyzing trace with hash -340863136, now seen corresponding path program 1 times [2022-07-21 08:51:00,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:00,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712556048] [2022-07-21 08:51:00,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:00,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:00,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:00,683 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:00,701 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:00,701 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:00,702 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-21 08:51:00,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-21 08:51:00,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-21 08:51:00,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-21 08:51:00,703 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-21 08:51:00,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 08:51:00,703 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 08:51:00,704 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:00,704 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-21 08:51:00,722 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-21 08:51:00,725 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 202 places, 220 transitions, 484 flow [2022-07-21 08:51:00,794 INFO L129 PetriNetUnfolder]: 99/733 cut-off events. [2022-07-21 08:51:00,794 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-21 08:51:00,804 INFO L84 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 733 events. 99/733 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3274 event pairs, 6 based on Foata normal form. 0/630 useless extension candidates. Maximal degree in co-relation 527. Up to 32 conditions per place. [2022-07-21 08:51:00,804 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 220 transitions, 484 flow [2022-07-21 08:51:00,808 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 220 transitions, 484 flow [2022-07-21 08:51:00,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:00,810 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@6917fcf8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@320534ca [2022-07-21 08:51:00,810 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-21 08:51:00,817 INFO L129 PetriNetUnfolder]: 6/113 cut-off events. [2022-07-21 08:51:00,817 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:51:00,817 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:00,818 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:00,818 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:51:00,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:00,819 INFO L85 PathProgramCache]: Analyzing trace with hash -747934017, now seen corresponding path program 1 times [2022-07-21 08:51:00,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:00,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978577262] [2022-07-21 08:51:00,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:00,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:00,869 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 08:51:00,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:00,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978577262] [2022-07-21 08:51:00,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978577262] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:00,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:00,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:51:00,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416278881] [2022-07-21 08:51:00,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:00,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:51:00,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:00,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:51:00,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:51:00,873 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 220 [2022-07-21 08:51:00,874 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 220 transitions, 484 flow. Second operand has 5 states, 5 states have (on average 175.2) internal successors, (876), 5 states have internal predecessors, (876), 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 08:51:00,875 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:00,875 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 220 [2022-07-21 08:51:00,875 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:02,286 INFO L129 PetriNetUnfolder]: 2347/11967 cut-off events. [2022-07-21 08:51:02,287 INFO L130 PetriNetUnfolder]: For 2052/2235 co-relation queries the response was YES. [2022-07-21 08:51:02,330 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16051 conditions, 11967 events. 2347/11967 cut-off events. For 2052/2235 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 134761 event pairs, 467 based on Foata normal form. 5204/16323 useless extension candidates. Maximal degree in co-relation 6009. Up to 1187 conditions per place. [2022-07-21 08:51:02,362 INFO L132 encePairwiseOnDemand]: 193/220 looper letters, 82 selfloop transitions, 8 changer transitions 0/264 dead transitions. [2022-07-21 08:51:02,362 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 264 transitions, 854 flow [2022-07-21 08:51:02,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 08:51:02,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 08:51:02,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1600 transitions. [2022-07-21 08:51:02,365 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9090909090909091 [2022-07-21 08:51:02,366 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1600 transitions. [2022-07-21 08:51:02,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1600 transitions. [2022-07-21 08:51:02,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:02,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1600 transitions. [2022-07-21 08:51:02,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 200.0) internal successors, (1600), 8 states have internal predecessors, (1600), 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 08:51:02,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 220.0) internal successors, (1980), 9 states have internal predecessors, (1980), 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 08:51:02,371 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 220.0) internal successors, (1980), 9 states have internal predecessors, (1980), 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 08:51:02,371 INFO L186 Difference]: Start difference. First operand has 202 places, 220 transitions, 484 flow. Second operand 8 states and 1600 transitions. [2022-07-21 08:51:02,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 264 transitions, 854 flow [2022-07-21 08:51:02,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 264 transitions, 854 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:02,376 INFO L242 Difference]: Finished difference. Result has 210 places, 202 transitions, 493 flow [2022-07-21 08:51:02,376 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=493, PETRI_PLACES=210, PETRI_TRANSITIONS=202} [2022-07-21 08:51:02,377 INFO L279 CegarLoopForPetriNet]: 202 programPoint places, 8 predicate places. [2022-07-21 08:51:02,377 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 202 transitions, 493 flow [2022-07-21 08:51:02,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 175.2) internal successors, (876), 5 states have internal predecessors, (876), 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 08:51:02,377 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:02,378 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] [2022-07-21 08:51:02,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 08:51:02,378 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:51:02,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:02,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1067536201, now seen corresponding path program 1 times [2022-07-21 08:51:02,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:02,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842648468] [2022-07-21 08:51:02,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:02,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:51:02,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:02,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842648468] [2022-07-21 08:51:02,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842648468] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:02,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:02,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:51:02,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284749439] [2022-07-21 08:51:02,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:02,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:51:02,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:02,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:51:02,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:51:02,435 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 220 [2022-07-21 08:51:02,436 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 202 transitions, 493 flow. Second operand has 5 states, 5 states have (on average 175.4) internal successors, (877), 5 states have internal predecessors, (877), 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 08:51:02,436 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:02,436 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 220 [2022-07-21 08:51:02,436 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:04,977 INFO L129 PetriNetUnfolder]: 4094/20832 cut-off events. [2022-07-21 08:51:04,977 INFO L130 PetriNetUnfolder]: For 6257/6652 co-relation queries the response was YES. [2022-07-21 08:51:05,081 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30428 conditions, 20832 events. 4094/20832 cut-off events. For 6257/6652 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 263465 event pairs, 987 based on Foata normal form. 60/19433 useless extension candidates. Maximal degree in co-relation 21198. Up to 2506 conditions per place. [2022-07-21 08:51:05,153 INFO L132 encePairwiseOnDemand]: 214/220 looper letters, 80 selfloop transitions, 14 changer transitions 0/271 dead transitions. [2022-07-21 08:51:05,153 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 271 transitions, 965 flow [2022-07-21 08:51:05,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 08:51:05,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 08:51:05,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1482 transitions. [2022-07-21 08:51:05,156 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8420454545454545 [2022-07-21 08:51:05,156 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1482 transitions. [2022-07-21 08:51:05,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1482 transitions. [2022-07-21 08:51:05,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:05,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1482 transitions. [2022-07-21 08:51:05,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 185.25) internal successors, (1482), 8 states have internal predecessors, (1482), 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 08:51:05,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 220.0) internal successors, (1980), 9 states have internal predecessors, (1980), 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 08:51:05,162 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 220.0) internal successors, (1980), 9 states have internal predecessors, (1980), 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 08:51:05,162 INFO L186 Difference]: Start difference. First operand has 210 places, 202 transitions, 493 flow. Second operand 8 states and 1482 transitions. [2022-07-21 08:51:05,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 271 transitions, 965 flow [2022-07-21 08:51:05,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 271 transitions, 965 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:05,174 INFO L242 Difference]: Finished difference. Result has 221 places, 212 transitions, 591 flow [2022-07-21 08:51:05,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=591, PETRI_PLACES=221, PETRI_TRANSITIONS=212} [2022-07-21 08:51:05,175 INFO L279 CegarLoopForPetriNet]: 202 programPoint places, 19 predicate places. [2022-07-21 08:51:05,175 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 212 transitions, 591 flow [2022-07-21 08:51:05,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 175.4) internal successors, (877), 5 states have internal predecessors, (877), 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 08:51:05,176 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:05,176 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] [2022-07-21 08:51:05,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 08:51:05,176 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:51:05,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:05,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1025099248, now seen corresponding path program 1 times [2022-07-21 08:51:05,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:05,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137103577] [2022-07-21 08:51:05,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:05,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 08:51:05,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:05,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137103577] [2022-07-21 08:51:05,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137103577] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:05,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:05,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:51:05,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394471799] [2022-07-21 08:51:05,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:05,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:51:05,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:05,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:51:05,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:51:05,225 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 220 [2022-07-21 08:51:05,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 212 transitions, 591 flow. Second operand has 5 states, 5 states have (on average 175.6) internal successors, (878), 5 states have internal predecessors, (878), 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 08:51:05,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:05,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 220 [2022-07-21 08:51:05,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:09,665 INFO L129 PetriNetUnfolder]: 6519/37031 cut-off events. [2022-07-21 08:51:09,666 INFO L130 PetriNetUnfolder]: For 12292/13047 co-relation queries the response was YES. [2022-07-21 08:51:09,868 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54771 conditions, 37031 events. 6519/37031 cut-off events. For 12292/13047 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 536154 event pairs, 2369 based on Foata normal form. 68/34551 useless extension candidates. Maximal degree in co-relation 40282. Up to 4409 conditions per place. [2022-07-21 08:51:09,982 INFO L132 encePairwiseOnDemand]: 214/220 looper letters, 78 selfloop transitions, 32 changer transitions 0/290 dead transitions. [2022-07-21 08:51:09,982 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 290 transitions, 1215 flow [2022-07-21 08:51:09,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 08:51:09,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 08:51:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1480 transitions. [2022-07-21 08:51:09,985 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8409090909090909 [2022-07-21 08:51:09,985 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1480 transitions. [2022-07-21 08:51:09,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1480 transitions. [2022-07-21 08:51:09,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:09,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1480 transitions. [2022-07-21 08:51:09,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 185.0) internal successors, (1480), 8 states have internal predecessors, (1480), 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 08:51:09,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 220.0) internal successors, (1980), 9 states have internal predecessors, (1980), 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 08:51:09,990 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 220.0) internal successors, (1980), 9 states have internal predecessors, (1980), 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 08:51:09,990 INFO L186 Difference]: Start difference. First operand has 221 places, 212 transitions, 591 flow. Second operand 8 states and 1480 transitions. [2022-07-21 08:51:09,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 290 transitions, 1215 flow [2022-07-21 08:51:10,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 290 transitions, 1215 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:10,032 INFO L242 Difference]: Finished difference. Result has 232 places, 234 transitions, 877 flow [2022-07-21 08:51:10,032 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=877, PETRI_PLACES=232, PETRI_TRANSITIONS=234} [2022-07-21 08:51:10,034 INFO L279 CegarLoopForPetriNet]: 202 programPoint places, 30 predicate places. [2022-07-21 08:51:10,034 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 234 transitions, 877 flow [2022-07-21 08:51:10,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 175.6) internal successors, (878), 5 states have internal predecessors, (878), 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 08:51:10,034 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:10,035 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:51:10,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 08:51:10,035 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:51:10,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:10,035 INFO L85 PathProgramCache]: Analyzing trace with hash 823299250, now seen corresponding path program 1 times [2022-07-21 08:51:10,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:10,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639356775] [2022-07-21 08:51:10,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:10,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:10,050 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:51:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:51:10,078 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:51:10,078 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:51:10,079 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-21 08:51:10,079 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-21 08:51:10,079 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-21 08:51:10,079 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-21 08:51:10,079 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-21 08:51:10,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-21 08:51:10,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 08:51:10,080 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-21 08:51:10,081 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:51:10,081 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-21 08:51:10,110 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-21 08:51:10,112 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 224 places, 244 transitions, 548 flow [2022-07-21 08:51:10,194 INFO L129 PetriNetUnfolder]: 161/1099 cut-off events. [2022-07-21 08:51:10,194 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-21 08:51:10,205 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1210 conditions, 1099 events. 161/1099 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5455 event pairs, 23 based on Foata normal form. 0/949 useless extension candidates. Maximal degree in co-relation 778. Up to 80 conditions per place. [2022-07-21 08:51:10,206 INFO L82 GeneralOperation]: Start removeDead. Operand has 224 places, 244 transitions, 548 flow [2022-07-21 08:51:10,213 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 244 transitions, 548 flow [2022-07-21 08:51:10,215 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:51:10,216 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@6917fcf8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@320534ca [2022-07-21 08:51:10,216 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-21 08:51:10,220 INFO L129 PetriNetUnfolder]: 6/115 cut-off events. [2022-07-21 08:51:10,220 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:51:10,221 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:10,221 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:10,221 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:51:10,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:10,221 INFO L85 PathProgramCache]: Analyzing trace with hash 478540307, now seen corresponding path program 1 times [2022-07-21 08:51:10,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:10,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655870733] [2022-07-21 08:51:10,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:10,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:10,275 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 08:51:10,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:10,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655870733] [2022-07-21 08:51:10,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655870733] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:10,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:10,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:51:10,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038978830] [2022-07-21 08:51:10,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:10,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:51:10,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:10,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:51:10,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:51:10,278 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 244 [2022-07-21 08:51:10,280 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 244 transitions, 548 flow. Second operand has 5 states, 5 states have (on average 192.2) internal successors, (961), 5 states have internal predecessors, (961), 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 08:51:10,280 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:10,280 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 244 [2022-07-21 08:51:10,280 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:14,532 INFO L129 PetriNetUnfolder]: 7238/33388 cut-off events. [2022-07-21 08:51:14,532 INFO L130 PetriNetUnfolder]: For 7802/8195 co-relation queries the response was YES. [2022-07-21 08:51:14,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45758 conditions, 33388 events. 7238/33388 cut-off events. For 7802/8195 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 437689 event pairs, 2172 based on Foata normal form. 16132/47131 useless extension candidates. Maximal degree in co-relation 16798. Up to 3313 conditions per place. [2022-07-21 08:51:14,842 INFO L132 encePairwiseOnDemand]: 214/244 looper letters, 99 selfloop transitions, 8 changer transitions 0/298 dead transitions. [2022-07-21 08:51:14,842 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 298 transitions, 1012 flow [2022-07-21 08:51:14,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 08:51:14,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 08:51:14,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1774 transitions. [2022-07-21 08:51:14,846 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9088114754098361 [2022-07-21 08:51:14,846 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1774 transitions. [2022-07-21 08:51:14,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1774 transitions. [2022-07-21 08:51:14,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:14,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1774 transitions. [2022-07-21 08:51:14,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 221.75) internal successors, (1774), 8 states have internal predecessors, (1774), 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 08:51:14,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 244.0) internal successors, (2196), 9 states have internal predecessors, (2196), 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 08:51:14,852 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 244.0) internal successors, (2196), 9 states have internal predecessors, (2196), 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 08:51:14,853 INFO L186 Difference]: Start difference. First operand has 224 places, 244 transitions, 548 flow. Second operand 8 states and 1774 transitions. [2022-07-21 08:51:14,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 298 transitions, 1012 flow [2022-07-21 08:51:14,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 298 transitions, 1012 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:14,861 INFO L242 Difference]: Finished difference. Result has 231 places, 222 transitions, 549 flow [2022-07-21 08:51:14,862 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=549, PETRI_PLACES=231, PETRI_TRANSITIONS=222} [2022-07-21 08:51:14,862 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 7 predicate places. [2022-07-21 08:51:14,862 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 222 transitions, 549 flow [2022-07-21 08:51:14,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 192.2) internal successors, (961), 5 states have internal predecessors, (961), 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 08:51:14,863 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:14,863 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] [2022-07-21 08:51:14,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 08:51:14,863 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:51:14,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:14,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1245790069, now seen corresponding path program 1 times [2022-07-21 08:51:14,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:14,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873900335] [2022-07-21 08:51:14,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:14,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:51:15,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:15,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873900335] [2022-07-21 08:51:15,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873900335] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:15,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:15,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:51:15,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616914817] [2022-07-21 08:51:15,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:15,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:51:15,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:15,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:51:15,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:51:15,061 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 244 [2022-07-21 08:51:15,062 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 222 transitions, 549 flow. Second operand has 5 states, 5 states have (on average 192.4) internal successors, (962), 5 states have internal predecessors, (962), 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 08:51:15,062 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:15,062 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 244 [2022-07-21 08:51:15,062 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:22,497 INFO L129 PetriNetUnfolder]: 12832/56417 cut-off events. [2022-07-21 08:51:22,497 INFO L130 PetriNetUnfolder]: For 19721/20657 co-relation queries the response was YES. [2022-07-21 08:51:22,976 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83711 conditions, 56417 events. 12832/56417 cut-off events. For 19721/20657 co-relation queries the response was YES. Maximal size of possible extension queue 1222. Compared 796620 event pairs, 3078 based on Foata normal form. 137/52504 useless extension candidates. Maximal degree in co-relation 58564. Up to 7154 conditions per place. [2022-07-21 08:51:23,210 INFO L132 encePairwiseOnDemand]: 238/244 looper letters, 97 selfloop transitions, 14 changer transitions 0/305 dead transitions. [2022-07-21 08:51:23,211 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 305 transitions, 1123 flow [2022-07-21 08:51:23,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 08:51:23,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 08:51:23,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1635 transitions. [2022-07-21 08:51:23,214 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8376024590163934 [2022-07-21 08:51:23,214 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1635 transitions. [2022-07-21 08:51:23,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1635 transitions. [2022-07-21 08:51:23,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:23,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1635 transitions. [2022-07-21 08:51:23,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 204.375) internal successors, (1635), 8 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:23,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 244.0) internal successors, (2196), 9 states have internal predecessors, (2196), 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 08:51:23,220 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 244.0) internal successors, (2196), 9 states have internal predecessors, (2196), 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 08:51:23,221 INFO L186 Difference]: Start difference. First operand has 231 places, 222 transitions, 549 flow. Second operand 8 states and 1635 transitions. [2022-07-21 08:51:23,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 305 transitions, 1123 flow [2022-07-21 08:51:23,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 305 transitions, 1123 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:23,261 INFO L242 Difference]: Finished difference. Result has 242 places, 232 transitions, 647 flow [2022-07-21 08:51:23,261 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=647, PETRI_PLACES=242, PETRI_TRANSITIONS=232} [2022-07-21 08:51:23,262 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 18 predicate places. [2022-07-21 08:51:23,262 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 232 transitions, 647 flow [2022-07-21 08:51:23,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 192.4) internal successors, (962), 5 states have internal predecessors, (962), 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 08:51:23,263 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:23,263 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] [2022-07-21 08:51:23,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 08:51:23,263 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:51:23,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:23,264 INFO L85 PathProgramCache]: Analyzing trace with hash -782038302, now seen corresponding path program 1 times [2022-07-21 08:51:23,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:23,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017618626] [2022-07-21 08:51:23,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:23,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 08:51:23,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:23,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017618626] [2022-07-21 08:51:23,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017618626] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:51:23,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:51:23,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:51:23,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807282640] [2022-07-21 08:51:23,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:51:23,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:51:23,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:23,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:51:23,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:51:23,314 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 244 [2022-07-21 08:51:23,315 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 232 transitions, 647 flow. Second operand has 5 states, 5 states have (on average 192.6) internal successors, (963), 5 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:23,315 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:23,315 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 244 [2022-07-21 08:51:23,315 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:51:37,844 INFO L129 PetriNetUnfolder]: 21556/99843 cut-off events. [2022-07-21 08:51:37,844 INFO L130 PetriNetUnfolder]: For 38202/39964 co-relation queries the response was YES. [2022-07-21 08:51:38,794 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151382 conditions, 99843 events. 21556/99843 cut-off events. For 38202/39964 co-relation queries the response was YES. Maximal size of possible extension queue 2487. Compared 1588537 event pairs, 6834 based on Foata normal form. 159/93204 useless extension candidates. Maximal degree in co-relation 110603. Up to 13234 conditions per place. [2022-07-21 08:51:39,200 INFO L132 encePairwiseOnDemand]: 238/244 looper letters, 95 selfloop transitions, 32 changer transitions 0/324 dead transitions. [2022-07-21 08:51:39,200 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 324 transitions, 1373 flow [2022-07-21 08:51:39,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 08:51:39,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 08:51:39,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1633 transitions. [2022-07-21 08:51:39,206 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.836577868852459 [2022-07-21 08:51:39,206 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1633 transitions. [2022-07-21 08:51:39,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1633 transitions. [2022-07-21 08:51:39,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:51:39,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1633 transitions. [2022-07-21 08:51:39,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 204.125) internal successors, (1633), 8 states have internal predecessors, (1633), 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 08:51:39,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 244.0) internal successors, (2196), 9 states have internal predecessors, (2196), 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 08:51:39,212 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 244.0) internal successors, (2196), 9 states have internal predecessors, (2196), 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 08:51:39,212 INFO L186 Difference]: Start difference. First operand has 242 places, 232 transitions, 647 flow. Second operand 8 states and 1633 transitions. [2022-07-21 08:51:39,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 324 transitions, 1373 flow [2022-07-21 08:51:39,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 324 transitions, 1373 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:51:39,390 INFO L242 Difference]: Finished difference. Result has 253 places, 254 transitions, 933 flow [2022-07-21 08:51:39,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=933, PETRI_PLACES=253, PETRI_TRANSITIONS=254} [2022-07-21 08:51:39,391 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 29 predicate places. [2022-07-21 08:51:39,391 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 254 transitions, 933 flow [2022-07-21 08:51:39,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 192.6) internal successors, (963), 5 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:51:39,392 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:51:39,392 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:51:39,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 08:51:39,393 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:51:39,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:51:39,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1341293639, now seen corresponding path program 1 times [2022-07-21 08:51:39,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:51:39,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194906174] [2022-07-21 08:51:39,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:39,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:51:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:39,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:51:39,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194906174] [2022-07-21 08:51:39,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194906174] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:51:39,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903508952] [2022-07-21 08:51:39,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:51:39,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:51:39,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:51:39,456 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:51:39,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 08:51:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:51:39,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:51:39,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:51:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:39,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:51:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:51:39,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903508952] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:51:39,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:51:39,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:51:39,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200321924] [2022-07-21 08:51:39,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:51:39,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:51:39,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:51:39,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:51:39,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:51:39,891 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 244 [2022-07-21 08:51:39,892 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 254 transitions, 933 flow. Second operand has 10 states, 10 states have (on average 199.3) internal successors, (1993), 10 states have internal predecessors, (1993), 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 08:51:39,893 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:51:39,893 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 244 [2022-07-21 08:51:39,893 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand