./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.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_86-lists_racing.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 db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:53:10,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:53:10,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:53:10,780 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:53:10,781 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:53:10,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:53:10,786 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:53:10,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:53:10,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:53:10,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:53:10,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:53:10,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:53:10,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:53:10,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:53:10,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:53:10,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:53:10,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:53:10,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:53:10,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:53:10,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:53:10,815 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:53:10,816 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:53:10,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:53:10,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:53:10,820 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:53:10,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:53:10,826 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:53:10,827 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:53:10,828 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:53:10,828 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:53:10,830 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:53:10,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:53:10,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:53:10,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:53:10,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:53:10,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:53:10,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:53:10,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:53:10,836 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:53:10,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:53:10,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:53:10,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:53:10,843 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:53:10,869 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:53:10,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:53:10,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:53:10,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:53:10,871 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:53:10,871 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:53:10,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:53:10,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:53:10,872 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:53:10,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:53:10,873 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:53:10,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:53:10,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:53:10,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:53:10,874 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:53:10,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:53:10,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:53:10,874 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:53:10,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:53:10,874 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:53:10,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:53:10,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:53:10,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:53:10,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:53:10,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:53:10,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:53:10,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:53:10,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:53:10,875 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:53:10,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:53:10,875 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:53:10,875 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:53:10,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:53:10,876 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a [2022-07-21 08:53:11,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:53:11,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:53:11,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:53:11,241 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:53:11,243 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:53:11,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2022-07-21 08:53:11,300 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f949127fa/960872cf8d1541fd8dd71601826ac132/FLAGf4f26625a [2022-07-21 08:53:11,831 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:53:11,832 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2022-07-21 08:53:11,850 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f949127fa/960872cf8d1541fd8dd71601826ac132/FLAGf4f26625a [2022-07-21 08:53:12,128 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f949127fa/960872cf8d1541fd8dd71601826ac132 [2022-07-21 08:53:12,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:53:12,132 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:53:12,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:53:12,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:53:12,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:53:12,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:12,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b4603cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12, skipping insertion in model container [2022-07-21 08:53:12,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:12,146 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:53:12,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:53:12,583 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_86-lists_racing.i[47038,47051] [2022-07-21 08:53:12,618 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:53:12,713 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:53:12,768 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i[47038,47051] [2022-07-21 08:53:12,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:53:12,868 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:53:12,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12 WrapperNode [2022-07-21 08:53:12,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:53:12,871 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:53:12,871 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:53:12,871 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:53:12,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:12,920 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:12,959 INFO L137 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 227 [2022-07-21 08:53:12,959 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:53:12,960 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:53:12,960 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:53:12,961 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:53:12,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:12,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:12,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:12,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:12,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:12,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:13,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:13,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:53:13,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:53:13,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:53:13,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:53:13,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12" (1/1) ... [2022-07-21 08:53:13,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:53:13,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:13,057 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 08:53:13,084 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 08:53:13,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:53:13,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 08:53:13,102 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-07-21 08:53:13,102 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-07-21 08:53:13,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:53:13,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:53:13,103 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-07-21 08:53:13,103 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-07-21 08:53:13,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:53:13,103 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-21 08:53:13,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 08:53:13,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:53:13,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 08:53:13,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:53:13,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:53:13,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:53:13,105 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 08:53:13,290 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:53:13,292 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:53:13,684 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:53:13,693 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:53:13,693 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2022-07-21 08:53:13,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:53:13 BoogieIcfgContainer [2022-07-21 08:53:13,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:53:13,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:53:13,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:53:13,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:53:13,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:53:12" (1/3) ... [2022-07-21 08:53:13,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61dc19b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:53:13, skipping insertion in model container [2022-07-21 08:53:13,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:53:12" (2/3) ... [2022-07-21 08:53:13,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61dc19b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:53:13, skipping insertion in model container [2022-07-21 08:53:13,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:53:13" (3/3) ... [2022-07-21 08:53:13,703 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing.i [2022-07-21 08:53:13,708 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:53:13,716 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:53:13,717 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:53:13,717 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:53:13,793 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-21 08:53:13,826 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 221 places, 241 transitions, 504 flow [2022-07-21 08:53:13,938 INFO L129 PetriNetUnfolder]: 54/446 cut-off events. [2022-07-21 08:53:13,938 INFO L130 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-07-21 08:53:13,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 446 events. 54/446 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1750 event pairs, 0 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 229. Up to 8 conditions per place. [2022-07-21 08:53:13,959 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 241 transitions, 504 flow [2022-07-21 08:53:13,971 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 221 places, 239 transitions, 494 flow [2022-07-21 08:53:13,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:53:13,994 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@4ba1e7ab, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@50a8b818 [2022-07-21 08:53:13,995 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 08:53:14,035 INFO L129 PetriNetUnfolder]: 10/128 cut-off events. [2022-07-21 08:53:14,036 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:53:14,036 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:14,037 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] [2022-07-21 08:53:14,038 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:53:14,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:14,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1325719117, now seen corresponding path program 1 times [2022-07-21 08:53:14,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:14,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319842559] [2022-07-21 08:53:14,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:14,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:14,279 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 08:53:14,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:14,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319842559] [2022-07-21 08:53:14,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319842559] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:14,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:14,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:53:14,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766606278] [2022-07-21 08:53:14,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:14,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:53:14,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:14,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:53:14,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:53:14,327 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 241 [2022-07-21 08:53:14,334 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 239 transitions, 494 flow. Second operand has 2 states, 2 states have (on average 218.0) internal successors, (436), 2 states have internal predecessors, (436), 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 08:53:14,334 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:14,334 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 241 [2022-07-21 08:53:14,336 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:14,445 INFO L129 PetriNetUnfolder]: 11/393 cut-off events. [2022-07-21 08:53:14,446 INFO L130 PetriNetUnfolder]: For 19/29 co-relation queries the response was YES. [2022-07-21 08:53:14,449 INFO L84 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 393 events. 11/393 cut-off events. For 19/29 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1454 event pairs, 0 based on Foata normal form. 50/418 useless extension candidates. Maximal degree in co-relation 197. Up to 8 conditions per place. [2022-07-21 08:53:14,452 INFO L132 encePairwiseOnDemand]: 224/241 looper letters, 4 selfloop transitions, 0 changer transitions 0/221 dead transitions. [2022-07-21 08:53:14,452 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 221 transitions, 466 flow [2022-07-21 08:53:14,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:53:14,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:53:14,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 455 transitions. [2022-07-21 08:53:14,470 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9439834024896265 [2022-07-21 08:53:14,471 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 455 transitions. [2022-07-21 08:53:14,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 455 transitions. [2022-07-21 08:53:14,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:14,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 455 transitions. [2022-07-21 08:53:14,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 227.5) internal successors, (455), 2 states have internal predecessors, (455), 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 08:53:14,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 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 08:53:14,486 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 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 08:53:14,488 INFO L186 Difference]: Start difference. First operand has 221 places, 239 transitions, 494 flow. Second operand 2 states and 455 transitions. [2022-07-21 08:53:14,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 221 transitions, 466 flow [2022-07-21 08:53:14,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 221 transitions, 466 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:53:14,497 INFO L242 Difference]: Finished difference. Result has 221 places, 221 transitions, 458 flow [2022-07-21 08:53:14,499 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=458, PETRI_PLACES=221, PETRI_TRANSITIONS=221} [2022-07-21 08:53:14,503 INFO L279 CegarLoopForPetriNet]: 221 programPoint places, 0 predicate places. [2022-07-21 08:53:14,503 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 221 transitions, 458 flow [2022-07-21 08:53:14,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 218.0) internal successors, (436), 2 states have internal predecessors, (436), 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 08:53:14,504 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:14,504 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] [2022-07-21 08:53:14,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:53:14,504 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:53:14,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:14,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1972175826, now seen corresponding path program 1 times [2022-07-21 08:53:14,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:14,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921748962] [2022-07-21 08:53:14,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:14,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:14,572 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 08:53:14,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:14,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921748962] [2022-07-21 08:53:14,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921748962] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:14,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:14,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:53:14,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553594136] [2022-07-21 08:53:14,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:14,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:53:14,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:14,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:53:14,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:53:14,578 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 241 [2022-07-21 08:53:14,579 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 221 transitions, 458 flow. Second operand has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 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 08:53:14,579 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:14,579 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 241 [2022-07-21 08:53:14,579 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:14,660 INFO L129 PetriNetUnfolder]: 11/408 cut-off events. [2022-07-21 08:53:14,661 INFO L130 PetriNetUnfolder]: For 19/29 co-relation queries the response was YES. [2022-07-21 08:53:14,663 INFO L84 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 408 events. 11/408 cut-off events. For 19/29 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1450 event pairs, 0 based on Foata normal form. 0/383 useless extension candidates. Maximal degree in co-relation 441. Up to 16 conditions per place. [2022-07-21 08:53:14,665 INFO L132 encePairwiseOnDemand]: 238/241 looper letters, 15 selfloop transitions, 2 changer transitions 0/226 dead transitions. [2022-07-21 08:53:14,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 226 transitions, 502 flow [2022-07-21 08:53:14,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:53:14,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:53:14,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 645 transitions. [2022-07-21 08:53:14,668 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8921161825726142 [2022-07-21 08:53:14,668 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 645 transitions. [2022-07-21 08:53:14,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 645 transitions. [2022-07-21 08:53:14,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:14,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 645 transitions. [2022-07-21 08:53:14,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:53:14,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 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 08:53:14,674 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 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 08:53:14,674 INFO L186 Difference]: Start difference. First operand has 221 places, 221 transitions, 458 flow. Second operand 3 states and 645 transitions. [2022-07-21 08:53:14,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 226 transitions, 502 flow [2022-07-21 08:53:14,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 226 transitions, 502 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:53:14,680 INFO L242 Difference]: Finished difference. Result has 224 places, 222 transitions, 470 flow [2022-07-21 08:53:14,680 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=470, PETRI_PLACES=224, PETRI_TRANSITIONS=222} [2022-07-21 08:53:14,681 INFO L279 CegarLoopForPetriNet]: 221 programPoint places, 3 predicate places. [2022-07-21 08:53:14,681 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 222 transitions, 470 flow [2022-07-21 08:53:14,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 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 08:53:14,682 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:14,682 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:14,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:53:14,683 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:53:14,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:14,683 INFO L85 PathProgramCache]: Analyzing trace with hash -56279307, now seen corresponding path program 1 times [2022-07-21 08:53:14,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:14,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274605180] [2022-07-21 08:53:14,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:14,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:53:14,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:14,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274605180] [2022-07-21 08:53:14,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274605180] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:14,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282445695] [2022-07-21 08:53:14,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:14,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:14,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:14,779 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 08:53:14,797 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 08:53:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:14,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:53:14,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:53:15,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:15,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:53:15,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282445695] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:15,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:15,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:53:15,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108100760] [2022-07-21 08:53:15,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:15,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:53:15,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:15,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:53:15,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:53:15,106 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 241 [2022-07-21 08:53:15,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 222 transitions, 470 flow. Second operand has 10 states, 10 states have (on average 210.4) internal successors, (2104), 10 states have internal predecessors, (2104), 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 08:53:15,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:15,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 241 [2022-07-21 08:53:15,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:15,246 INFO L129 PetriNetUnfolder]: 11/426 cut-off events. [2022-07-21 08:53:15,247 INFO L130 PetriNetUnfolder]: For 20/30 co-relation queries the response was YES. [2022-07-21 08:53:15,249 INFO L84 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 426 events. 11/426 cut-off events. For 20/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1375 event pairs, 0 based on Foata normal form. 2/404 useless extension candidates. Maximal degree in co-relation 474. Up to 12 conditions per place. [2022-07-21 08:53:15,250 INFO L132 encePairwiseOnDemand]: 235/241 looper letters, 17 selfloop transitions, 9 changer transitions 0/234 dead transitions. [2022-07-21 08:53:15,250 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 234 transitions, 548 flow [2022-07-21 08:53:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:53:15,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:53:15,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1900 transitions. [2022-07-21 08:53:15,255 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.875979714153988 [2022-07-21 08:53:15,255 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1900 transitions. [2022-07-21 08:53:15,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1900 transitions. [2022-07-21 08:53:15,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:15,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1900 transitions. [2022-07-21 08:53:15,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 211.11111111111111) internal successors, (1900), 9 states have internal predecessors, (1900), 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 08:53:15,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 241.0) internal successors, (2410), 10 states have internal predecessors, (2410), 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 08:53:15,266 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 241.0) internal successors, (2410), 10 states have internal predecessors, (2410), 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 08:53:15,266 INFO L186 Difference]: Start difference. First operand has 224 places, 222 transitions, 470 flow. Second operand 9 states and 1900 transitions. [2022-07-21 08:53:15,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 234 transitions, 548 flow [2022-07-21 08:53:15,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 234 transitions, 546 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:53:15,272 INFO L242 Difference]: Finished difference. Result has 234 places, 228 transitions, 518 flow [2022-07-21 08:53:15,272 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=518, PETRI_PLACES=234, PETRI_TRANSITIONS=228} [2022-07-21 08:53:15,273 INFO L279 CegarLoopForPetriNet]: 221 programPoint places, 13 predicate places. [2022-07-21 08:53:15,273 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 228 transitions, 518 flow [2022-07-21 08:53:15,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 210.4) internal successors, (2104), 10 states have internal predecessors, (2104), 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 08:53:15,275 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:15,275 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-21 08:53:15,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:15,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:15,492 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:53:15,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:15,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1794391237, now seen corresponding path program 2 times [2022-07-21 08:53:15,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:15,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827187425] [2022-07-21 08:53:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:15,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:53:15,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:15,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827187425] [2022-07-21 08:53:15,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827187425] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:15,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459069349] [2022-07-21 08:53:15,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 08:53:15,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:15,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:15,683 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:15,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 08:53:15,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 08:53:15,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:53:15,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:53:15,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:53:15,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:53:16,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459069349] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:16,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:16,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:53:16,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731616287] [2022-07-21 08:53:16,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:16,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:53:16,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:16,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:53:16,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:53:16,135 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 241 [2022-07-21 08:53:16,140 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 228 transitions, 518 flow. Second operand has 18 states, 18 states have (on average 210.66666666666666) internal successors, (3792), 18 states have internal predecessors, (3792), 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 08:53:16,140 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:16,140 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 241 [2022-07-21 08:53:16,140 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:16,432 INFO L129 PetriNetUnfolder]: 11/490 cut-off events. [2022-07-21 08:53:16,432 INFO L130 PetriNetUnfolder]: For 40/50 co-relation queries the response was YES. [2022-07-21 08:53:16,435 INFO L84 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 490 events. 11/490 cut-off events. For 40/50 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1370 event pairs, 0 based on Foata normal form. 4/470 useless extension candidates. Maximal degree in co-relation 609. Up to 12 conditions per place. [2022-07-21 08:53:16,437 INFO L132 encePairwiseOnDemand]: 235/241 looper letters, 29 selfloop transitions, 21 changer transitions 0/258 dead transitions. [2022-07-21 08:53:16,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 258 transitions, 738 flow [2022-07-21 08:53:16,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:53:16,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:53:16,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4422 transitions. [2022-07-21 08:53:16,447 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8737403675163011 [2022-07-21 08:53:16,448 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4422 transitions. [2022-07-21 08:53:16,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4422 transitions. [2022-07-21 08:53:16,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:16,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4422 transitions. [2022-07-21 08:53:16,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 210.57142857142858) internal successors, (4422), 21 states have internal predecessors, (4422), 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 08:53:16,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 241.0) internal successors, (5302), 22 states have internal predecessors, (5302), 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 08:53:16,474 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 241.0) internal successors, (5302), 22 states have internal predecessors, (5302), 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 08:53:16,474 INFO L186 Difference]: Start difference. First operand has 234 places, 228 transitions, 518 flow. Second operand 21 states and 4422 transitions. [2022-07-21 08:53:16,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 258 transitions, 738 flow [2022-07-21 08:53:16,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 258 transitions, 724 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:53:16,483 INFO L242 Difference]: Finished difference. Result has 258 places, 241 transitions, 642 flow [2022-07-21 08:53:16,484 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=642, PETRI_PLACES=258, PETRI_TRANSITIONS=241} [2022-07-21 08:53:16,485 INFO L279 CegarLoopForPetriNet]: 221 programPoint places, 37 predicate places. [2022-07-21 08:53:16,485 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 241 transitions, 642 flow [2022-07-21 08:53:16,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 210.66666666666666) internal successors, (3792), 18 states have internal predecessors, (3792), 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 08:53:16,487 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:16,487 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2022-07-21 08:53:16,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:16,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-21 08:53:16,701 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 08:53:16,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:16,702 INFO L85 PathProgramCache]: Analyzing trace with hash 536937415, now seen corresponding path program 3 times [2022-07-21 08:53:16,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:16,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820118019] [2022-07-21 08:53:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:16,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:53:17,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:17,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820118019] [2022-07-21 08:53:17,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820118019] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:17,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465852003] [2022-07-21 08:53:17,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 08:53:17,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:17,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:17,030 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:17,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process