./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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_93-evilcollapse_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 dad265ed8a17f32bb0a174302dfe188f9a15f60b81cc9c28a67851ab05270da2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:18:48,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:18:48,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:18:48,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:18:48,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:18:48,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:18:48,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:18:48,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:18:48,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:18:48,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:18:48,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:18:48,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:18:48,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:18:48,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:18:48,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:18:48,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:18:48,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:18:48,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:18:48,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:18:48,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:18:48,850 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:18:48,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:18:48,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:18:48,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:18:48,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:18:48,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:18:48,857 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:18:48,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:18:48,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:18:48,858 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:18:48,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:18:48,859 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:18:48,860 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:18:48,861 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:18:48,861 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:18:48,862 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:18:48,862 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:18:48,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:18:48,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:18:48,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:18:48,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:18:48,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:18:48,865 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:18:48,886 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:18:48,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:18:48,887 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:18:48,887 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:18:48,887 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:18:48,888 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:18:48,888 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:18:48,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:18:48,888 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:18:48,889 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:18:48,889 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:18:48,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:18:48,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:18:48,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:18:48,890 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:18:48,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:18:48,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:18:48,890 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:18:48,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:18:48,890 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:18:48,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:18:48,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:18:48,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:18:48,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:18:48,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:18:48,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:18:48,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:18:48,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:18:48,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:18:48,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:18:48,892 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:18:48,892 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:18:48,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:18:48,892 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dad265ed8a17f32bb0a174302dfe188f9a15f60b81cc9c28a67851ab05270da2 [2022-07-12 10:18:49,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:18:49,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:18:49,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:18:49,088 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:18:49,089 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:18:49,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i [2022-07-12 10:18:49,128 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1729e5c0/0c48083bddfb4a85ad7f9c253fb6e331/FLAG2bcfda426 [2022-07-12 10:18:49,545 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:18:49,545 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i [2022-07-12 10:18:49,563 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1729e5c0/0c48083bddfb4a85ad7f9c253fb6e331/FLAG2bcfda426 [2022-07-12 10:18:49,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1729e5c0/0c48083bddfb4a85ad7f9c253fb6e331 [2022-07-12 10:18:49,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:18:49,573 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:18:49,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:18:49,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:18:49,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:18:49,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:18:49" (1/1) ... [2022-07-12 10:18:49,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@106c39b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:49, skipping insertion in model container [2022-07-12 10:18:49,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:18:49" (1/1) ... [2022-07-12 10:18:49,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:18:49,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:18:49,915 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_93-evilcollapse_racefree.i[47038,47051] [2022-07-12 10:18:49,925 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:49,926 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:49,926 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:49,926 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:49,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:18:49,958 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:18:49,976 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_93-evilcollapse_racefree.i[47038,47051] [2022-07-12 10:18:49,978 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:49,978 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:49,978 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:49,979 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:49,986 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:18:50,023 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:18:50,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:50 WrapperNode [2022-07-12 10:18:50,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:18:50,025 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:18:50,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:18:50,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:18:50,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:50" (1/1) ... [2022-07-12 10:18:50,043 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:50" (1/1) ... [2022-07-12 10:18:50,065 INFO L137 Inliner]: procedures = 279, calls = 51, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 223 [2022-07-12 10:18:50,066 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:18:50,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:18:50,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:18:50,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:18:50,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:50" (1/1) ... [2022-07-12 10:18:50,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:50" (1/1) ... [2022-07-12 10:18:50,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:50" (1/1) ... [2022-07-12 10:18:50,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:50" (1/1) ... [2022-07-12 10:18:50,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:50" (1/1) ... [2022-07-12 10:18:50,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:50" (1/1) ... [2022-07-12 10:18:50,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:50" (1/1) ... [2022-07-12 10:18:50,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:18:50,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:18:50,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:18:50,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:18:50,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:50" (1/1) ... [2022-07-12 10:18:50,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:18:50,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:50,116 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) [2022-07-12 10:18:50,123 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 [2022-07-12 10:18:50,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:18:50,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 10:18:50,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:18:50,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:18:50,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:18:50,157 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-12 10:18:50,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:18:50,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:18:50,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 10:18:50,158 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-12 10:18:50,158 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-12 10:18:50,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:18:50,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:18:50,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:18:50,159 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:18:50,285 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:18:50,286 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:18:50,547 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:18:50,553 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:18:50,555 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2022-07-12 10:18:50,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:18:50 BoogieIcfgContainer [2022-07-12 10:18:50,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:18:50,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:18:50,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:18:50,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:18:50,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:18:49" (1/3) ... [2022-07-12 10:18:50,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@afdd9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:18:50, skipping insertion in model container [2022-07-12 10:18:50,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:50" (2/3) ... [2022-07-12 10:18:50,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@afdd9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:18:50, skipping insertion in model container [2022-07-12 10:18:50,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:18:50" (3/3) ... [2022-07-12 10:18:50,566 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_93-evilcollapse_racefree.i [2022-07-12 10:18:50,571 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:18:50,579 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:18:50,579 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:18:50,580 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:18:50,652 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-12 10:18:50,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 232 places, 256 transitions, 520 flow [2022-07-12 10:18:50,734 INFO L129 PetriNetUnfolder]: 29/273 cut-off events. [2022-07-12 10:18:50,734 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-07-12 10:18:50,740 INFO L84 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 273 events. 29/273 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 585 event pairs, 0 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 155. Up to 4 conditions per place. [2022-07-12 10:18:50,740 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 256 transitions, 520 flow [2022-07-12 10:18:50,745 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 251 transitions, 507 flow [2022-07-12 10:18:50,754 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:18:50,758 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@7af8d0d6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@d9e2d5d [2022-07-12 10:18:50,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 10:18:50,795 INFO L129 PetriNetUnfolder]: 10/177 cut-off events. [2022-07-12 10:18:50,798 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:18:50,798 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:50,799 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:50,799 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:18:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:50,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1684978418, now seen corresponding path program 1 times [2022-07-12 10:18:50,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:50,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373233189] [2022-07-12 10:18:50,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:50,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:51,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:18:51,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:51,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373233189] [2022-07-12 10:18:51,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373233189] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:51,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:51,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:18:51,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134960713] [2022-07-12 10:18:51,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:51,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:18:51,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:51,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:18:51,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:18:51,052 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 256 [2022-07-12 10:18:51,056 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 251 transitions, 507 flow. Second operand has 2 states, 2 states have (on average 234.0) internal successors, (468), 2 states have internal predecessors, (468), 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) [2022-07-12 10:18:51,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:51,058 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 256 [2022-07-12 10:18:51,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:51,110 INFO L129 PetriNetUnfolder]: 6/245 cut-off events. [2022-07-12 10:18:51,110 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:18:51,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 245 events. 6/245 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 440 event pairs, 0 based on Foata normal form. 22/253 useless extension candidates. Maximal degree in co-relation 149. Up to 2 conditions per place. [2022-07-12 10:18:51,112 INFO L132 encePairwiseOnDemand]: 236/256 looper letters, 1 selfloop transitions, 0 changer transitions 2/230 dead transitions. [2022-07-12 10:18:51,113 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 230 transitions, 467 flow [2022-07-12 10:18:51,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:18:51,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:18:51,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 487 transitions. [2022-07-12 10:18:51,126 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.951171875 [2022-07-12 10:18:51,127 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 487 transitions. [2022-07-12 10:18:51,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 487 transitions. [2022-07-12 10:18:51,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:51,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 487 transitions. [2022-07-12 10:18:51,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 243.5) internal successors, (487), 2 states have internal predecessors, (487), 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) [2022-07-12 10:18:51,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 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) [2022-07-12 10:18:51,145 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 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) [2022-07-12 10:18:51,147 INFO L186 Difference]: Start difference. First operand has 228 places, 251 transitions, 507 flow. Second operand 2 states and 487 transitions. [2022-07-12 10:18:51,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 230 transitions, 467 flow [2022-07-12 10:18:51,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 230 transitions, 467 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:18:51,169 INFO L242 Difference]: Finished difference. Result has 228 places, 228 transitions, 461 flow [2022-07-12 10:18:51,171 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=461, PETRI_PLACES=228, PETRI_TRANSITIONS=228} [2022-07-12 10:18:51,175 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 0 predicate places. [2022-07-12 10:18:51,175 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 228 transitions, 461 flow [2022-07-12 10:18:51,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 234.0) internal successors, (468), 2 states have internal predecessors, (468), 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) [2022-07-12 10:18:51,176 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:51,176 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:51,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:18:51,177 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:18:51,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:51,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1809051665, now seen corresponding path program 1 times [2022-07-12 10:18:51,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:51,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309051232] [2022-07-12 10:18:51,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:51,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:18:51,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:51,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309051232] [2022-07-12 10:18:51,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309051232] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:51,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:51,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:18:51,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385369421] [2022-07-12 10:18:51,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:51,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:18:51,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:51,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:18:51,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:18:51,296 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 256 [2022-07-12 10:18:51,297 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 228 transitions, 461 flow. Second operand has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 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) [2022-07-12 10:18:51,297 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:51,297 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 256 [2022-07-12 10:18:51,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:51,368 INFO L129 PetriNetUnfolder]: 7/293 cut-off events. [2022-07-12 10:18:51,369 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:18:51,370 INFO L84 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 293 events. 7/293 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 617 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 314. Up to 12 conditions per place. [2022-07-12 10:18:51,371 INFO L132 encePairwiseOnDemand]: 253/256 looper letters, 16 selfloop transitions, 2 changer transitions 0/235 dead transitions. [2022-07-12 10:18:51,371 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 235 transitions, 511 flow [2022-07-12 10:18:51,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:18:51,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:18:51,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 688 transitions. [2022-07-12 10:18:51,374 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8958333333333334 [2022-07-12 10:18:51,374 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 688 transitions. [2022-07-12 10:18:51,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 688 transitions. [2022-07-12 10:18:51,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:51,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 688 transitions. [2022-07-12 10:18:51,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 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) [2022-07-12 10:18:51,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 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) [2022-07-12 10:18:51,379 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 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) [2022-07-12 10:18:51,379 INFO L186 Difference]: Start difference. First operand has 228 places, 228 transitions, 461 flow. Second operand 3 states and 688 transitions. [2022-07-12 10:18:51,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 235 transitions, 511 flow [2022-07-12 10:18:51,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 235 transitions, 511 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:18:51,389 INFO L242 Difference]: Finished difference. Result has 229 places, 229 transitions, 473 flow [2022-07-12 10:18:51,389 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=473, PETRI_PLACES=229, PETRI_TRANSITIONS=229} [2022-07-12 10:18:51,390 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 1 predicate places. [2022-07-12 10:18:51,390 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 229 transitions, 473 flow [2022-07-12 10:18:51,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 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) [2022-07-12 10:18:51,391 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:51,391 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:51,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:18:51,392 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:18:51,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:51,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1280121739, now seen corresponding path program 1 times [2022-07-12 10:18:51,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:51,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846309707] [2022-07-12 10:18:51,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:51,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:18:51,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:51,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846309707] [2022-07-12 10:18:51,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846309707] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:51,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:51,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:18:51,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577700129] [2022-07-12 10:18:51,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:51,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:18:51,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:51,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:18:51,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:18:51,477 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 256 [2022-07-12 10:18:51,478 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 229 transitions, 473 flow. Second operand has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 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) [2022-07-12 10:18:51,478 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:51,478 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 256 [2022-07-12 10:18:51,478 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:51,514 INFO L129 PetriNetUnfolder]: 7/365 cut-off events. [2022-07-12 10:18:51,514 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:18:51,514 INFO L84 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 365 events. 7/365 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 717 event pairs, 0 based on Foata normal form. 0/353 useless extension candidates. Maximal degree in co-relation 395. Up to 15 conditions per place. [2022-07-12 10:18:51,516 INFO L132 encePairwiseOnDemand]: 253/256 looper letters, 10 selfloop transitions, 2 changer transitions 0/233 dead transitions. [2022-07-12 10:18:51,516 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 233 transitions, 505 flow [2022-07-12 10:18:51,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:18:51,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:18:51,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 691 transitions. [2022-07-12 10:18:51,518 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8997395833333334 [2022-07-12 10:18:51,518 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 691 transitions. [2022-07-12 10:18:51,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 691 transitions. [2022-07-12 10:18:51,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:51,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 691 transitions. [2022-07-12 10:18:51,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 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) [2022-07-12 10:18:51,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 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) [2022-07-12 10:18:51,522 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 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) [2022-07-12 10:18:51,522 INFO L186 Difference]: Start difference. First operand has 229 places, 229 transitions, 473 flow. Second operand 3 states and 691 transitions. [2022-07-12 10:18:51,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 233 transitions, 505 flow [2022-07-12 10:18:51,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 233 transitions, 503 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:51,533 INFO L242 Difference]: Finished difference. Result has 231 places, 230 transitions, 483 flow [2022-07-12 10:18:51,533 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=483, PETRI_PLACES=231, PETRI_TRANSITIONS=230} [2022-07-12 10:18:51,535 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 3 predicate places. [2022-07-12 10:18:51,535 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 230 transitions, 483 flow [2022-07-12 10:18:51,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 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) [2022-07-12 10:18:51,536 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:51,536 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:51,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:18:51,537 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:18:51,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:51,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2086167297, now seen corresponding path program 1 times [2022-07-12 10:18:51,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:51,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772068568] [2022-07-12 10:18:51,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:51,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:51,582 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:18:51,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252829351] [2022-07-12 10:18:51,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:51,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:51,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:51,585 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) [2022-07-12 10:18:51,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:18:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:51,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:18:51,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:18:51,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:18:51,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:51,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772068568] [2022-07-12 10:18:51,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 10:18:51,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252829351] [2022-07-12 10:18:51,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252829351] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:51,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:18:51,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-12 10:18:51,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262054837] [2022-07-12 10:18:51,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:51,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:18:51,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:51,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:18:51,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:18:51,922 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 256 [2022-07-12 10:18:51,924 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 230 transitions, 483 flow. Second operand has 8 states, 8 states have (on average 227.0) internal successors, (1816), 8 states have internal predecessors, (1816), 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) [2022-07-12 10:18:51,924 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:51,924 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 256 [2022-07-12 10:18:51,924 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:52,014 INFO L129 PetriNetUnfolder]: 7/443 cut-off events. [2022-07-12 10:18:52,014 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:18:52,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 507 conditions, 443 events. 7/443 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 521 event pairs, 0 based on Foata normal form. 4/437 useless extension candidates. Maximal degree in co-relation 500. Up to 10 conditions per place. [2022-07-12 10:18:52,017 INFO L132 encePairwiseOnDemand]: 250/256 looper letters, 11 selfloop transitions, 9 changer transitions 0/240 dead transitions. [2022-07-12 10:18:52,018 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 240 transitions, 545 flow [2022-07-12 10:18:52,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:18:52,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:18:52,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2047 transitions. [2022-07-12 10:18:52,022 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8884548611111112 [2022-07-12 10:18:52,022 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2047 transitions. [2022-07-12 10:18:52,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2047 transitions. [2022-07-12 10:18:52,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:52,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2047 transitions. [2022-07-12 10:18:52,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 227.44444444444446) internal successors, (2047), 9 states have internal predecessors, (2047), 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) [2022-07-12 10:18:52,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 256.0) internal successors, (2560), 10 states have internal predecessors, (2560), 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) [2022-07-12 10:18:52,031 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 256.0) internal successors, (2560), 10 states have internal predecessors, (2560), 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) [2022-07-12 10:18:52,031 INFO L186 Difference]: Start difference. First operand has 231 places, 230 transitions, 483 flow. Second operand 9 states and 2047 transitions. [2022-07-12 10:18:52,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 240 transitions, 545 flow [2022-07-12 10:18:52,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 240 transitions, 543 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:52,035 INFO L242 Difference]: Finished difference. Result has 241 places, 236 transitions, 531 flow [2022-07-12 10:18:52,035 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=531, PETRI_PLACES=241, PETRI_TRANSITIONS=236} [2022-07-12 10:18:52,036 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 13 predicate places. [2022-07-12 10:18:52,037 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 236 transitions, 531 flow [2022-07-12 10:18:52,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 227.0) internal successors, (1816), 8 states have internal predecessors, (1816), 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) [2022-07-12 10:18:52,038 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:52,038 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:52,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:52,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:52,255 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:18:52,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:52,256 INFO L85 PathProgramCache]: Analyzing trace with hash -216012479, now seen corresponding path program 2 times [2022-07-12 10:18:52,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:52,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932507808] [2022-07-12 10:18:52,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:52,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:52,293 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:18:52,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677234641] [2022-07-12 10:18:52,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:18:52,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:52,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:52,295 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) [2022-07-12 10:18:52,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:18:52,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:18:52,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:18:52,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:18:52,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 1 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:18:52,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 1 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:18:52,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:52,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932507808] [2022-07-12 10:18:52,837 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 10:18:52,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677234641] [2022-07-12 10:18:52,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677234641] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:52,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:18:52,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-12 10:18:52,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182362414] [2022-07-12 10:18:52,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:52,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 10:18:52,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:52,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 10:18:52,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-12 10:18:52,844 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 256 [2022-07-12 10:18:52,848 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 236 transitions, 531 flow. Second operand has 16 states, 16 states have (on average 227.25) internal successors, (3636), 16 states have internal predecessors, (3636), 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) [2022-07-12 10:18:52,848 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:52,848 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 256 [2022-07-12 10:18:52,848 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:53,081 INFO L129 PetriNetUnfolder]: 7/739 cut-off events. [2022-07-12 10:18:53,081 INFO L130 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2022-07-12 10:18:53,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 739 events. 7/739 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 521 event pairs, 0 based on Foata normal form. 8/737 useless extension candidates. Maximal degree in co-relation 930. Up to 22 conditions per place. [2022-07-12 10:18:53,083 INFO L132 encePairwiseOnDemand]: 250/256 looper letters, 19 selfloop transitions, 21 changer transitions 0/260 dead transitions. [2022-07-12 10:18:53,084 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 260 transitions, 719 flow [2022-07-12 10:18:53,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:18:53,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:18:53,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4769 transitions. [2022-07-12 10:18:53,090 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8870907738095238 [2022-07-12 10:18:53,091 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4769 transitions. [2022-07-12 10:18:53,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4769 transitions. [2022-07-12 10:18:53,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:53,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4769 transitions. [2022-07-12 10:18:53,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 227.0952380952381) internal successors, (4769), 21 states have internal predecessors, (4769), 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) [2022-07-12 10:18:53,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 256.0) internal successors, (5632), 22 states have internal predecessors, (5632), 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) [2022-07-12 10:18:53,106 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 256.0) internal successors, (5632), 22 states have internal predecessors, (5632), 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) [2022-07-12 10:18:53,106 INFO L186 Difference]: Start difference. First operand has 241 places, 236 transitions, 531 flow. Second operand 21 states and 4769 transitions. [2022-07-12 10:18:53,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 260 transitions, 719 flow [2022-07-12 10:18:53,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 260 transitions, 705 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:53,111 INFO L242 Difference]: Finished difference. Result has 265 places, 249 transitions, 655 flow [2022-07-12 10:18:53,111 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=655, PETRI_PLACES=265, PETRI_TRANSITIONS=249} [2022-07-12 10:18:53,112 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 37 predicate places. [2022-07-12 10:18:53,112 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 249 transitions, 655 flow [2022-07-12 10:18:53,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 227.25) internal successors, (3636), 16 states have internal predecessors, (3636), 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) [2022-07-12 10:18:53,113 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:53,113 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:53,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:53,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:53,327 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:18:53,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:53,328 INFO L85 PathProgramCache]: Analyzing trace with hash -361462335, now seen corresponding path program 3 times [2022-07-12 10:18:53,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:53,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379542117] [2022-07-12 10:18:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:53,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:53,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:18:53,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411313001] [2022-07-12 10:18:53,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:18:53,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:53,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:53,367 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) [2022-07-12 10:18:53,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:18:53,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:18:53,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:18:53,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:18:53,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-07-12 10:18:53,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:54,104 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-07-12 10:18:54,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:54,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379542117] [2022-07-12 10:18:54,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 10:18:54,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411313001] [2022-07-12 10:18:54,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411313001] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:54,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:18:54,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-12 10:18:54,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961306721] [2022-07-12 10:18:54,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:54,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:18:54,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:54,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:18:54,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:18:54,109 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 256 [2022-07-12 10:18:54,111 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 249 transitions, 655 flow. Second operand has 8 states, 8 states have (on average 224.75) internal successors, (1798), 8 states have internal predecessors, (1798), 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) [2022-07-12 10:18:54,111 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:54,111 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 256 [2022-07-12 10:18:54,111 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:54,368 INFO L129 PetriNetUnfolder]: 8/1015 cut-off events. [2022-07-12 10:18:54,368 INFO L130 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2022-07-12 10:18:54,369 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1351 conditions, 1015 events. 8/1015 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 209 event pairs, 0 based on Foata normal form. 2/1007 useless extension candidates. Maximal degree in co-relation 1337. Up to 33 conditions per place. [2022-07-12 10:18:54,371 INFO L132 encePairwiseOnDemand]: 250/256 looper letters, 20 selfloop transitions, 9 changer transitions 0/265 dead transitions. [2022-07-12 10:18:54,371 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 265 transitions, 747 flow [2022-07-12 10:18:54,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:18:54,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:18:54,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2029 transitions. [2022-07-12 10:18:54,374 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8806423611111112 [2022-07-12 10:18:54,374 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2029 transitions. [2022-07-12 10:18:54,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2029 transitions. [2022-07-12 10:18:54,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:54,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2029 transitions. [2022-07-12 10:18:54,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 225.44444444444446) internal successors, (2029), 9 states have internal predecessors, (2029), 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) [2022-07-12 10:18:54,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 256.0) internal successors, (2560), 10 states have internal predecessors, (2560), 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) [2022-07-12 10:18:54,382 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 256.0) internal successors, (2560), 10 states have internal predecessors, (2560), 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) [2022-07-12 10:18:54,382 INFO L186 Difference]: Start difference. First operand has 265 places, 249 transitions, 655 flow. Second operand 9 states and 2029 transitions. [2022-07-12 10:18:54,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 265 transitions, 747 flow [2022-07-12 10:18:54,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 265 transitions, 723 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-07-12 10:18:54,387 INFO L242 Difference]: Finished difference. Result has 270 places, 255 transitions, 681 flow [2022-07-12 10:18:54,388 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=681, PETRI_PLACES=270, PETRI_TRANSITIONS=255} [2022-07-12 10:18:54,388 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 42 predicate places. [2022-07-12 10:18:54,388 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 255 transitions, 681 flow [2022-07-12 10:18:54,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 224.75) internal successors, (1798), 8 states have internal predecessors, (1798), 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) [2022-07-12 10:18:54,389 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:54,389 INFO L200 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:54,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:54,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:54,603 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:18:54,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:54,604 INFO L85 PathProgramCache]: Analyzing trace with hash -165335103, now seen corresponding path program 4 times [2022-07-12 10:18:54,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:54,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581474645] [2022-07-12 10:18:54,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:54,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:54,679 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:18:54,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581245808] [2022-07-12 10:18:54,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:18:54,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:54,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:54,681 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:54,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:18:55,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:18:55,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:18:55,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 3419 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:18:55,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7883 backedges. 0 proven. 5526 refuted. 0 times theorem prover too weak. 2357 trivial. 0 not checked. [2022-07-12 10:18:55,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7883 backedges. 0 proven. 5526 refuted. 0 times theorem prover too weak. 2357 trivial. 0 not checked. [2022-07-12 10:18:56,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:56,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581474645] [2022-07-12 10:18:56,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 10:18:56,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581245808] [2022-07-12 10:18:56,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581245808] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:56,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:18:56,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-12 10:18:56,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19976609] [2022-07-12 10:18:56,730 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:56,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 10:18:56,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:56,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 10:18:56,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-12 10:18:56,735 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 256 [2022-07-12 10:18:56,738 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 255 transitions, 681 flow. Second operand has 16 states, 16 states have (on average 225.375) internal successors, (3606), 16 states have internal predecessors, (3606), 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) [2022-07-12 10:18:56,738 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:56,738 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 256 [2022-07-12 10:18:56,739 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:57,468 INFO L129 PetriNetUnfolder]: 12/2111 cut-off events. [2022-07-12 10:18:57,468 INFO L130 PetriNetUnfolder]: For 346/346 co-relation queries the response was YES. [2022-07-12 10:18:57,471 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2826 conditions, 2111 events. 12/2111 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 213 event pairs, 0 based on Foata normal form. 4/2105 useless extension candidates. Maximal degree in co-relation 2809. Up to 70 conditions per place. [2022-07-12 10:18:57,474 INFO L132 encePairwiseOnDemand]: 250/256 looper letters, 40 selfloop transitions, 21 changer transitions 0/297 dead transitions. [2022-07-12 10:18:57,474 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 297 transitions, 947 flow [2022-07-12 10:18:57,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:18:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:18:57,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4727 transitions. [2022-07-12 10:18:57,482 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8792782738095238 [2022-07-12 10:18:57,482 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4727 transitions. [2022-07-12 10:18:57,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4727 transitions. [2022-07-12 10:18:57,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:57,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4727 transitions. [2022-07-12 10:18:57,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 225.0952380952381) internal successors, (4727), 21 states have internal predecessors, (4727), 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) [2022-07-12 10:18:57,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 256.0) internal successors, (5632), 22 states have internal predecessors, (5632), 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) [2022-07-12 10:18:57,506 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 256.0) internal successors, (5632), 22 states have internal predecessors, (5632), 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) [2022-07-12 10:18:57,506 INFO L186 Difference]: Start difference. First operand has 270 places, 255 transitions, 681 flow. Second operand 21 states and 4727 transitions. [2022-07-12 10:18:57,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 297 transitions, 947 flow [2022-07-12 10:18:57,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 297 transitions, 933 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:57,512 INFO L242 Difference]: Finished difference. Result has 294 places, 268 transitions, 805 flow [2022-07-12 10:18:57,513 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=805, PETRI_PLACES=294, PETRI_TRANSITIONS=268} [2022-07-12 10:18:57,513 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 66 predicate places. [2022-07-12 10:18:57,513 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 268 transitions, 805 flow [2022-07-12 10:18:57,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 225.375) internal successors, (3606), 16 states have internal predecessors, (3606), 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) [2022-07-12 10:18:57,514 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:57,515 INFO L200 CegarLoopForPetriNet]: trace histogram [49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:57,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:57,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:57,728 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 10:18:57,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:57,728 INFO L85 PathProgramCache]: Analyzing trace with hash 178717633, now seen corresponding path program 5 times [2022-07-12 10:18:57,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:57,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861461502] [2022-07-12 10:18:57,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:57,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:57,916 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:18:57,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177999963] [2022-07-12 10:18:57,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:18:57,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:57,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:57,918 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:57,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process