./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.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_90-arrayloop2_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:18:41,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:18:41,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:18:41,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:18:41,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:18:41,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:18:41,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:18:41,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:18:41,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:18:41,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:18:41,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:18:41,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:18:41,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:18:41,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:18:41,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:18:41,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:18:41,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:18:41,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:18:41,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:18:41,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:18:41,831 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:18:41,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:18:41,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:18:41,833 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:18:41,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:18:41,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:18:41,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:18:41,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:18:41,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:18:41,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:18:41,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:18:41,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:18:41,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:18:41,844 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:18:41,844 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:18:41,845 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:18:41,845 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:18:41,845 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:18:41,845 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:18:41,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:18:41,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:18:41,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:18:41,849 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:18:41,871 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:18:41,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:18:41,874 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:18:41,874 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:18:41,874 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:18:41,874 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:18:41,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:18:41,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:18:41,875 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:18:41,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:18:41,876 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:18:41,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:18:41,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:18:41,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:18:41,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:18:41,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:18:41,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:18:41,877 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:18:41,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:18:41,877 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:18:41,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:18:41,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:18:41,878 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:18:41,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:18:41,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:18:41,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:18:41,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:18:41,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:18:41,879 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:18:41,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:18:41,879 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:18:41,879 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:18:41,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:18:41,879 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af [2022-07-12 10:18:42,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:18:42,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:18:42,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:18:42,133 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:18:42,133 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:18:42,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2022-07-12 10:18:42,215 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7eab605c0/414fbb7ae0674c87af723f4ce5624a1e/FLAG9e610e2ea [2022-07-12 10:18:42,685 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:18:42,686 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2022-07-12 10:18:42,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7eab605c0/414fbb7ae0674c87af723f4ce5624a1e/FLAG9e610e2ea [2022-07-12 10:18:43,044 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7eab605c0/414fbb7ae0674c87af723f4ce5624a1e [2022-07-12 10:18:43,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:18:43,047 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:18:43,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:18:43,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:18:43,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:18:43,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:18:43" (1/1) ... [2022-07-12 10:18:43,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b560d8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:43, skipping insertion in model container [2022-07-12 10:18:43,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:18:43" (1/1) ... [2022-07-12 10:18:43,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:18:43,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:18:43,460 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_90-arrayloop2_racing.i[47038,47051] [2022-07-12 10:18:43,473 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:43,473 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:43,474 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:43,474 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:43,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:18:43,556 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:18:43,601 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_90-arrayloop2_racing.i[47038,47051] [2022-07-12 10:18:43,606 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:43,606 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:43,606 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:43,607 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-12 10:18:43,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:18:43,647 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:18:43,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:43 WrapperNode [2022-07-12 10:18:43,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:18:43,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:18:43,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:18:43,649 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:18:43,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:43" (1/1) ... [2022-07-12 10:18:43,671 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:43" (1/1) ... [2022-07-12 10:18:43,702 INFO L137 Inliner]: procedures = 278, calls = 64, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 300 [2022-07-12 10:18:43,706 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:18:43,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:18:43,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:18:43,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:18:43,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:43" (1/1) ... [2022-07-12 10:18:43,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:43" (1/1) ... [2022-07-12 10:18:43,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:43" (1/1) ... [2022-07-12 10:18:43,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:43" (1/1) ... [2022-07-12 10:18:43,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:43" (1/1) ... [2022-07-12 10:18:43,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:43" (1/1) ... [2022-07-12 10:18:43,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:43" (1/1) ... [2022-07-12 10:18:43,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:18:43,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:18:43,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:18:43,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:18:43,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:43" (1/1) ... [2022-07-12 10:18:43,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:18:43,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:43,786 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 10:18:43,788 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 10:18:43,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:18:43,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 10:18:43,817 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-07-12 10:18:43,817 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-07-12 10:18:43,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:18:43,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:18:43,817 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-07-12 10:18:43,817 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-07-12 10:18:43,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:18:43,818 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-12 10:18:43,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:18:43,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:18:43,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 10:18:43,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:18:43,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:18:43,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:18:43,820 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 10:18:43,958 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:18:43,959 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:18:44,304 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:18:44,310 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:18:44,313 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2022-07-12 10:18:44,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:18:44 BoogieIcfgContainer [2022-07-12 10:18:44,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:18:44,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:18:44,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:18:44,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:18:44,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:18:43" (1/3) ... [2022-07-12 10:18:44,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42fcbf15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:18:44, skipping insertion in model container [2022-07-12 10:18:44,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:18:43" (2/3) ... [2022-07-12 10:18:44,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42fcbf15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:18:44, skipping insertion in model container [2022-07-12 10:18:44,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:18:44" (3/3) ... [2022-07-12 10:18:44,325 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_90-arrayloop2_racing.i [2022-07-12 10:18:44,328 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:18:44,334 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:18:44,334 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-12 10:18:44,335 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:18:44,408 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-12 10:18:44,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 277 places, 318 transitions, 658 flow [2022-07-12 10:18:44,541 INFO L129 PetriNetUnfolder]: 77/514 cut-off events. [2022-07-12 10:18:44,542 INFO L130 PetriNetUnfolder]: For 8/14 co-relation queries the response was YES. [2022-07-12 10:18:44,548 INFO L84 FinitePrefix]: Finished finitePrefix Result has 534 conditions, 514 events. 77/514 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2392 event pairs, 0 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 261. Up to 8 conditions per place. [2022-07-12 10:18:44,548 INFO L82 GeneralOperation]: Start removeDead. Operand has 277 places, 318 transitions, 658 flow [2022-07-12 10:18:44,559 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 277 places, 318 transitions, 658 flow [2022-07-12 10:18:44,566 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:18:44,572 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@3e36da6a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@34b5391d [2022-07-12 10:18:44,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-12 10:18:44,597 INFO L129 PetriNetUnfolder]: 13/135 cut-off events. [2022-07-12 10:18:44,597 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:18:44,597 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:44,598 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] [2022-07-12 10:18:44,598 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:18:44,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:44,602 INFO L85 PathProgramCache]: Analyzing trace with hash 115208198, now seen corresponding path program 1 times [2022-07-12 10:18:44,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:44,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696484437] [2022-07-12 10:18:44,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:44,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:44,776 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 10:18:44,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:44,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696484437] [2022-07-12 10:18:44,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696484437] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:44,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:44,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:18:44,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375421322] [2022-07-12 10:18:44,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:44,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:18:44,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:44,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:18:44,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:18:44,807 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 318 [2022-07-12 10:18:44,809 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 318 transitions, 658 flow. Second operand has 2 states, 2 states have (on average 277.0) internal successors, (554), 2 states have internal predecessors, (554), 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 10:18:44,810 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:44,810 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 318 [2022-07-12 10:18:44,811 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:44,869 INFO L129 PetriNetUnfolder]: 19/453 cut-off events. [2022-07-12 10:18:44,870 INFO L130 PetriNetUnfolder]: For 33/41 co-relation queries the response was YES. [2022-07-12 10:18:44,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 453 events. 19/453 cut-off events. For 33/41 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2141 event pairs, 0 based on Foata normal form. 97/519 useless extension candidates. Maximal degree in co-relation 235. Up to 12 conditions per place. [2022-07-12 10:18:44,876 INFO L132 encePairwiseOnDemand]: 284/318 looper letters, 6 selfloop transitions, 0 changer transitions 0/282 dead transitions. [2022-07-12 10:18:44,876 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 282 transitions, 598 flow [2022-07-12 10:18:44,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:18:44,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:18:44,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 592 transitions. [2022-07-12 10:18:44,887 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9308176100628931 [2022-07-12 10:18:44,887 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 592 transitions. [2022-07-12 10:18:44,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 592 transitions. [2022-07-12 10:18:44,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:44,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 592 transitions. [2022-07-12 10:18:44,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 296.0) internal successors, (592), 2 states have internal predecessors, (592), 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 10:18:44,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 318.0) internal successors, (954), 3 states have internal predecessors, (954), 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 10:18:44,901 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 318.0) internal successors, (954), 3 states have internal predecessors, (954), 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 10:18:44,903 INFO L186 Difference]: Start difference. First operand has 277 places, 318 transitions, 658 flow. Second operand 2 states and 592 transitions. [2022-07-12 10:18:44,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 282 transitions, 598 flow [2022-07-12 10:18:44,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 282 transitions, 598 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:18:44,914 INFO L242 Difference]: Finished difference. Result has 276 places, 282 transitions, 586 flow [2022-07-12 10:18:44,915 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=586, PETRI_PLACES=276, PETRI_TRANSITIONS=282} [2022-07-12 10:18:44,919 INFO L279 CegarLoopForPetriNet]: 277 programPoint places, -1 predicate places. [2022-07-12 10:18:44,920 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 282 transitions, 586 flow [2022-07-12 10:18:44,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 277.0) internal successors, (554), 2 states have internal predecessors, (554), 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 10:18:44,920 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:44,920 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] [2022-07-12 10:18:44,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:18:44,921 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:18:44,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:44,928 INFO L85 PathProgramCache]: Analyzing trace with hash -881864155, now seen corresponding path program 1 times [2022-07-12 10:18:44,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:44,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230175984] [2022-07-12 10:18:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:44,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:45,025 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 10:18:45,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:45,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230175984] [2022-07-12 10:18:45,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230175984] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:45,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:45,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:18:45,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516884349] [2022-07-12 10:18:45,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:45,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:18:45,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:45,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:18:45,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:18:45,035 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 318 [2022-07-12 10:18:45,036 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 282 transitions, 586 flow. Second operand has 3 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 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 10:18:45,036 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:45,036 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 318 [2022-07-12 10:18:45,036 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:45,115 INFO L129 PetriNetUnfolder]: 20/503 cut-off events. [2022-07-12 10:18:45,115 INFO L130 PetriNetUnfolder]: For 33/41 co-relation queries the response was YES. [2022-07-12 10:18:45,118 INFO L84 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 503 events. 20/503 cut-off events. For 33/41 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2408 event pairs, 0 based on Foata normal form. 0/471 useless extension candidates. Maximal degree in co-relation 548. Up to 22 conditions per place. [2022-07-12 10:18:45,120 INFO L132 encePairwiseOnDemand]: 315/318 looper letters, 21 selfloop transitions, 2 changer transitions 0/289 dead transitions. [2022-07-12 10:18:45,120 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 289 transitions, 646 flow [2022-07-12 10:18:45,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:18:45,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:18:45,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 822 transitions. [2022-07-12 10:18:45,123 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8616352201257862 [2022-07-12 10:18:45,123 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 822 transitions. [2022-07-12 10:18:45,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 822 transitions. [2022-07-12 10:18:45,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:45,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 822 transitions. [2022-07-12 10:18:45,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 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 10:18:45,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 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 10:18:45,128 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 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 10:18:45,128 INFO L186 Difference]: Start difference. First operand has 276 places, 282 transitions, 586 flow. Second operand 3 states and 822 transitions. [2022-07-12 10:18:45,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 289 transitions, 646 flow [2022-07-12 10:18:45,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 289 transitions, 646 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:18:45,134 INFO L242 Difference]: Finished difference. Result has 279 places, 283 transitions, 598 flow [2022-07-12 10:18:45,135 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=598, PETRI_PLACES=279, PETRI_TRANSITIONS=283} [2022-07-12 10:18:45,136 INFO L279 CegarLoopForPetriNet]: 277 programPoint places, 2 predicate places. [2022-07-12 10:18:45,136 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 283 transitions, 598 flow [2022-07-12 10:18:45,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 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 10:18:45,136 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:45,137 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] [2022-07-12 10:18:45,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:18:45,137 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:18:45,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:45,139 INFO L85 PathProgramCache]: Analyzing trace with hash -32979058, now seen corresponding path program 1 times [2022-07-12 10:18:45,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:45,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084577944] [2022-07-12 10:18:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:45,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:45,205 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 10:18:45,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:45,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084577944] [2022-07-12 10:18:45,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084577944] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:45,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:45,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:18:45,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931786433] [2022-07-12 10:18:45,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:45,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:18:45,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:45,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:18:45,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:18:45,208 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 318 [2022-07-12 10:18:45,209 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 283 transitions, 598 flow. Second operand has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 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 10:18:45,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:45,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 318 [2022-07-12 10:18:45,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:45,309 INFO L129 PetriNetUnfolder]: 20/575 cut-off events. [2022-07-12 10:18:45,309 INFO L130 PetriNetUnfolder]: For 34/42 co-relation queries the response was YES. [2022-07-12 10:18:45,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 575 events. 20/575 cut-off events. For 34/42 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2488 event pairs, 0 based on Foata normal form. 0/544 useless extension candidates. Maximal degree in co-relation 629. Up to 25 conditions per place. [2022-07-12 10:18:45,315 INFO L132 encePairwiseOnDemand]: 315/318 looper letters, 15 selfloop transitions, 2 changer transitions 0/287 dead transitions. [2022-07-12 10:18:45,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 287 transitions, 640 flow [2022-07-12 10:18:45,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:18:45,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:18:45,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 825 transitions. [2022-07-12 10:18:45,318 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8647798742138365 [2022-07-12 10:18:45,318 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 825 transitions. [2022-07-12 10:18:45,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 825 transitions. [2022-07-12 10:18:45,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:45,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 825 transitions. [2022-07-12 10:18:45,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 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 10:18:45,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 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 10:18:45,322 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 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 10:18:45,322 INFO L186 Difference]: Start difference. First operand has 279 places, 283 transitions, 598 flow. Second operand 3 states and 825 transitions. [2022-07-12 10:18:45,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 287 transitions, 640 flow [2022-07-12 10:18:45,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 287 transitions, 638 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:45,328 INFO L242 Difference]: Finished difference. Result has 281 places, 284 transitions, 608 flow [2022-07-12 10:18:45,329 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=608, PETRI_PLACES=281, PETRI_TRANSITIONS=284} [2022-07-12 10:18:45,330 INFO L279 CegarLoopForPetriNet]: 277 programPoint places, 4 predicate places. [2022-07-12 10:18:45,331 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 284 transitions, 608 flow [2022-07-12 10:18:45,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 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 10:18:45,331 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:45,331 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] [2022-07-12 10:18:45,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:18:45,332 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:18:45,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:45,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1227432893, now seen corresponding path program 1 times [2022-07-12 10:18:45,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:45,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675769482] [2022-07-12 10:18:45,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:45,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:45,386 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:18:45,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328734046] [2022-07-12 10:18:45,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:45,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:45,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:45,400 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 10:18:45,406 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 10:18:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:45,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:18:45,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:45,630 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 10:18:45,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:45,689 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 10:18:45,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:45,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675769482] [2022-07-12 10:18:45,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 10:18:45,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328734046] [2022-07-12 10:18:45,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328734046] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:45,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:18:45,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-12 10:18:45,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446287180] [2022-07-12 10:18:45,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:45,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:18:45,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:45,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:18:45,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:18:45,694 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 318 [2022-07-12 10:18:45,696 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 284 transitions, 608 flow. Second operand has 8 states, 8 states have (on average 270.0) internal successors, (2160), 8 states have internal predecessors, (2160), 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 10:18:45,696 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:45,696 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 318 [2022-07-12 10:18:45,696 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:45,824 INFO L129 PetriNetUnfolder]: 20/653 cut-off events. [2022-07-12 10:18:45,824 INFO L130 PetriNetUnfolder]: For 39/47 co-relation queries the response was YES. [2022-07-12 10:18:45,828 INFO L84 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 653 events. 20/653 cut-off events. For 39/47 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2228 event pairs, 0 based on Foata normal form. 4/628 useless extension candidates. Maximal degree in co-relation 734. Up to 19 conditions per place. [2022-07-12 10:18:45,829 INFO L132 encePairwiseOnDemand]: 312/318 looper letters, 16 selfloop transitions, 9 changer transitions 0/294 dead transitions. [2022-07-12 10:18:45,830 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 294 transitions, 680 flow [2022-07-12 10:18:45,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:18:45,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:18:45,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2439 transitions. [2022-07-12 10:18:45,834 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8522012578616353 [2022-07-12 10:18:45,834 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2439 transitions. [2022-07-12 10:18:45,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2439 transitions. [2022-07-12 10:18:45,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:45,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2439 transitions. [2022-07-12 10:18:45,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 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 10:18:45,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 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 10:18:45,867 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 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 10:18:45,867 INFO L186 Difference]: Start difference. First operand has 281 places, 284 transitions, 608 flow. Second operand 9 states and 2439 transitions. [2022-07-12 10:18:45,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 294 transitions, 680 flow [2022-07-12 10:18:45,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 294 transitions, 678 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:45,872 INFO L242 Difference]: Finished difference. Result has 291 places, 290 transitions, 656 flow [2022-07-12 10:18:45,872 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=656, PETRI_PLACES=291, PETRI_TRANSITIONS=290} [2022-07-12 10:18:45,873 INFO L279 CegarLoopForPetriNet]: 277 programPoint places, 14 predicate places. [2022-07-12 10:18:45,873 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 290 transitions, 656 flow [2022-07-12 10:18:45,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 270.0) internal successors, (2160), 8 states have internal predecessors, (2160), 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 10:18:45,874 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:45,875 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] [2022-07-12 10:18:45,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 10:18:46,093 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 10:18:46,093 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:18:46,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:46,094 INFO L85 PathProgramCache]: Analyzing trace with hash -134988195, now seen corresponding path program 2 times [2022-07-12 10:18:46,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:46,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407279649] [2022-07-12 10:18:46,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:46,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:46,150 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:18:46,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450945767] [2022-07-12 10:18:46,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:18:46,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:46,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:46,153 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 10:18:46,154 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 10:18:46,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:18:46,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:18:46,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:18:46,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:46,492 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 10:18:46,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:46,640 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 10:18:46,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:46,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407279649] [2022-07-12 10:18:46,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 10:18:46,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450945767] [2022-07-12 10:18:46,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450945767] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:46,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:18:46,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-12 10:18:46,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374679963] [2022-07-12 10:18:46,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:46,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 10:18:46,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:46,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 10:18:46,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-12 10:18:46,647 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 318 [2022-07-12 10:18:46,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 290 transitions, 656 flow. Second operand has 16 states, 16 states have (on average 270.25) internal successors, (4324), 16 states have internal predecessors, (4324), 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 10:18:46,664 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:46,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 318 [2022-07-12 10:18:46,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:46,906 INFO L129 PetriNetUnfolder]: 20/949 cut-off events. [2022-07-12 10:18:46,906 INFO L130 PetriNetUnfolder]: For 93/101 co-relation queries the response was YES. [2022-07-12 10:18:46,908 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1174 conditions, 949 events. 20/949 cut-off events. For 93/101 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2228 event pairs, 0 based on Foata normal form. 8/928 useless extension candidates. Maximal degree in co-relation 1164. Up to 22 conditions per place. [2022-07-12 10:18:46,910 INFO L132 encePairwiseOnDemand]: 312/318 looper letters, 24 selfloop transitions, 21 changer transitions 0/314 dead transitions. [2022-07-12 10:18:46,910 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 314 transitions, 854 flow [2022-07-12 10:18:46,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:18:46,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:18:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5677 transitions. [2022-07-12 10:18:46,918 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.850104821802935 [2022-07-12 10:18:46,918 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5677 transitions. [2022-07-12 10:18:46,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5677 transitions. [2022-07-12 10:18:46,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:46,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5677 transitions. [2022-07-12 10:18:46,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 270.3333333333333) internal successors, (5677), 21 states have internal predecessors, (5677), 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 10:18:46,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 318.0) internal successors, (6996), 22 states have internal predecessors, (6996), 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 10:18:46,935 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 318.0) internal successors, (6996), 22 states have internal predecessors, (6996), 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 10:18:46,935 INFO L186 Difference]: Start difference. First operand has 291 places, 290 transitions, 656 flow. Second operand 21 states and 5677 transitions. [2022-07-12 10:18:46,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 314 transitions, 854 flow [2022-07-12 10:18:46,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 314 transitions, 840 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:46,941 INFO L242 Difference]: Finished difference. Result has 315 places, 303 transitions, 780 flow [2022-07-12 10:18:46,941 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=780, PETRI_PLACES=315, PETRI_TRANSITIONS=303} [2022-07-12 10:18:46,942 INFO L279 CegarLoopForPetriNet]: 277 programPoint places, 38 predicate places. [2022-07-12 10:18:46,942 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 303 transitions, 780 flow [2022-07-12 10:18:46,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 270.25) internal successors, (4324), 16 states have internal predecessors, (4324), 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 10:18:46,944 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:46,944 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] [2022-07-12 10:18:46,964 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 10:18:47,161 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 10:18:47,162 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:18:47,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:47,162 INFO L85 PathProgramCache]: Analyzing trace with hash -491054179, now seen corresponding path program 3 times [2022-07-12 10:18:47,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:47,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153458734] [2022-07-12 10:18:47,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:47,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:47,204 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:18:47,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426408420] [2022-07-12 10:18:47,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:18:47,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:47,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:47,219 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 10:18:47,220 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 10:18:47,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:18:47,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:18:47,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:18:47,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:47,681 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 10:18:47,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:47,922 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 10:18:47,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:47,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153458734] [2022-07-12 10:18:47,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 10:18:47,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426408420] [2022-07-12 10:18:47,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426408420] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:47,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:18:47,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-12 10:18:47,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418994531] [2022-07-12 10:18:47,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:47,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:18:47,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:47,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:18:47,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:18:47,926 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 318 [2022-07-12 10:18:47,928 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 303 transitions, 780 flow. Second operand has 8 states, 8 states have (on average 267.75) internal successors, (2142), 8 states have internal predecessors, (2142), 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 10:18:47,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:47,928 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 318 [2022-07-12 10:18:47,928 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:48,259 INFO L129 PetriNetUnfolder]: 21/1225 cut-off events. [2022-07-12 10:18:48,259 INFO L130 PetriNetUnfolder]: For 145/153 co-relation queries the response was YES. [2022-07-12 10:18:48,262 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1586 conditions, 1225 events. 21/1225 cut-off events. For 145/153 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1791 event pairs, 0 based on Foata normal form. 2/1198 useless extension candidates. Maximal degree in co-relation 1571. Up to 33 conditions per place. [2022-07-12 10:18:48,264 INFO L132 encePairwiseOnDemand]: 312/318 looper letters, 25 selfloop transitions, 9 changer transitions 0/319 dead transitions. [2022-07-12 10:18:48,265 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 319 transitions, 882 flow [2022-07-12 10:18:48,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:18:48,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:18:48,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2421 transitions. [2022-07-12 10:18:48,268 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8459119496855346 [2022-07-12 10:18:48,269 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2421 transitions. [2022-07-12 10:18:48,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2421 transitions. [2022-07-12 10:18:48,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:48,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2421 transitions. [2022-07-12 10:18:48,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 269.0) internal successors, (2421), 9 states have internal predecessors, (2421), 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 10:18:48,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 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 10:18:48,277 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 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 10:18:48,277 INFO L186 Difference]: Start difference. First operand has 315 places, 303 transitions, 780 flow. Second operand 9 states and 2421 transitions. [2022-07-12 10:18:48,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 319 transitions, 882 flow [2022-07-12 10:18:48,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 319 transitions, 858 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-07-12 10:18:48,283 INFO L242 Difference]: Finished difference. Result has 320 places, 309 transitions, 806 flow [2022-07-12 10:18:48,283 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=806, PETRI_PLACES=320, PETRI_TRANSITIONS=309} [2022-07-12 10:18:48,284 INFO L279 CegarLoopForPetriNet]: 277 programPoint places, 43 predicate places. [2022-07-12 10:18:48,284 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 309 transitions, 806 flow [2022-07-12 10:18:48,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 267.75) internal successors, (2142), 8 states have internal predecessors, (2142), 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 10:18:48,285 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:48,285 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] [2022-07-12 10:18:48,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-12 10:18:48,502 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 10:18:48,503 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:18:48,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:48,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1090462563, now seen corresponding path program 4 times [2022-07-12 10:18:48,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:48,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882235756] [2022-07-12 10:18:48,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:48,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:48,608 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:18:48,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023523773] [2022-07-12 10:18:48,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:18:48,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:48,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:48,610 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 10:18:48,655 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 10:18:49,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:18:49,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:18:49,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 3372 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:18:49,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:50,076 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 10:18:50,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:50,809 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 10:18:50,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:50,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882235756] [2022-07-12 10:18:50,809 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 10:18:50,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023523773] [2022-07-12 10:18:50,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023523773] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:50,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:18:50,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-12 10:18:50,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606297796] [2022-07-12 10:18:50,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:50,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 10:18:50,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:50,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 10:18:50,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-12 10:18:50,815 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 318 [2022-07-12 10:18:50,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 309 transitions, 806 flow. Second operand has 16 states, 16 states have (on average 268.375) internal successors, (4294), 16 states have internal predecessors, (4294), 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 10:18:50,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:50,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 318 [2022-07-12 10:18:50,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:51,799 INFO L129 PetriNetUnfolder]: 25/2321 cut-off events. [2022-07-12 10:18:51,799 INFO L130 PetriNetUnfolder]: For 378/386 co-relation queries the response was YES. [2022-07-12 10:18:51,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3061 conditions, 2321 events. 25/2321 cut-off events. For 378/386 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1795 event pairs, 0 based on Foata normal form. 4/2296 useless extension candidates. Maximal degree in co-relation 3043. Up to 70 conditions per place. [2022-07-12 10:18:51,806 INFO L132 encePairwiseOnDemand]: 312/318 looper letters, 45 selfloop transitions, 21 changer transitions 0/351 dead transitions. [2022-07-12 10:18:51,806 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 351 transitions, 1082 flow [2022-07-12 10:18:51,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:18:51,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:18:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5635 transitions. [2022-07-12 10:18:51,822 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8438155136268344 [2022-07-12 10:18:51,822 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5635 transitions. [2022-07-12 10:18:51,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5635 transitions. [2022-07-12 10:18:51,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:51,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5635 transitions. [2022-07-12 10:18:51,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 268.3333333333333) internal successors, (5635), 21 states have internal predecessors, (5635), 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 10:18:51,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 318.0) internal successors, (6996), 22 states have internal predecessors, (6996), 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 10:18:51,841 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 318.0) internal successors, (6996), 22 states have internal predecessors, (6996), 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 10:18:51,841 INFO L186 Difference]: Start difference. First operand has 320 places, 309 transitions, 806 flow. Second operand 21 states and 5635 transitions. [2022-07-12 10:18:51,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 351 transitions, 1082 flow [2022-07-12 10:18:51,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 351 transitions, 1068 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:51,848 INFO L242 Difference]: Finished difference. Result has 344 places, 322 transitions, 930 flow [2022-07-12 10:18:51,848 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=930, PETRI_PLACES=344, PETRI_TRANSITIONS=322} [2022-07-12 10:18:51,849 INFO L279 CegarLoopForPetriNet]: 277 programPoint places, 67 predicate places. [2022-07-12 10:18:51,849 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 322 transitions, 930 flow [2022-07-12 10:18:51,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 268.375) internal successors, (4294), 16 states have internal predecessors, (4294), 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 10:18:51,850 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:51,851 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] [2022-07-12 10:18:51,896 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 10:18:52,067 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 10:18:52,067 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-12 10:18:52,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:52,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1395941731, now seen corresponding path program 5 times [2022-07-12 10:18:52,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:52,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397622563] [2022-07-12 10:18:52,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:52,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:52,244 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 10:18:52,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718628921] [2022-07-12 10:18:52,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:18:52,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:52,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:52,246 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 10:18:52,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process