./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/weaver/popl20-bad-threaded-sum-2.wvr.c -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 e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:10:17,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:10:17,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:10:17,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:10:17,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:10:17,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:10:17,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:10:17,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:10:17,789 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:10:17,790 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:10:17,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:10:17,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:10:17,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:10:17,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:10:17,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:10:17,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:10:17,800 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:10:17,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:10:17,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:10:17,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:10:17,810 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:10:17,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:10:17,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:10:17,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:10:17,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:10:17,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:10:17,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:10:17,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:10:17,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:10:17,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:10:17,821 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:10:17,822 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:10:17,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:10:17,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:10:17,824 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:10:17,824 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:10:17,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:10:17,825 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:10:17,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:10:17,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:10:17,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:10:17,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:10:17,828 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:10:17,846 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:10:17,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:10:17,847 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:10:17,847 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:10:17,848 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:10:17,848 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:10:17,848 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:10:17,848 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:10:17,848 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:10:17,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:10:17,849 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:10:17,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:10:17,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:10:17,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:10:17,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:10:17,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:10:17,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:10:17,850 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:10:17,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:10:17,851 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:10:17,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:10:17,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:10:17,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:10:17,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:10:17,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:10:17,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:10:17,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:10:17,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:10:17,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:10:17,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:10:17,852 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:10:17,853 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:10:17,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:10:17,853 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db [2022-07-13 22:10:18,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:10:18,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:10:18,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:10:18,028 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:10:18,028 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:10:18,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-07-13 22:10:18,072 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/417b0a210/7dabc923206c4047a12b2c4d963aef5e/FLAGa68122052 [2022-07-13 22:10:18,446 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:10:18,447 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-07-13 22:10:18,451 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/417b0a210/7dabc923206c4047a12b2c4d963aef5e/FLAGa68122052 [2022-07-13 22:10:18,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/417b0a210/7dabc923206c4047a12b2c4d963aef5e [2022-07-13 22:10:18,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:10:18,466 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:10:18,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:10:18,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:10:18,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:10:18,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:10:18" (1/1) ... [2022-07-13 22:10:18,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@518303e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:18, skipping insertion in model container [2022-07-13 22:10:18,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:10:18" (1/1) ... [2022-07-13 22:10:18,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:10:18,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:10:18,620 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/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-07-13 22:10:18,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:10:18,628 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:10:18,642 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/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-07-13 22:10:18,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:10:18,651 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:10:18,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:18 WrapperNode [2022-07-13 22:10:18,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:10:18,652 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:10:18,652 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:10:18,652 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:10:18,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:18" (1/1) ... [2022-07-13 22:10:18,668 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:18" (1/1) ... [2022-07-13 22:10:18,686 INFO L137 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-07-13 22:10:18,686 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:10:18,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:10:18,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:10:18,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:10:18,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:18" (1/1) ... [2022-07-13 22:10:18,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:18" (1/1) ... [2022-07-13 22:10:18,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:18" (1/1) ... [2022-07-13 22:10:18,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:18" (1/1) ... [2022-07-13 22:10:18,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:18" (1/1) ... [2022-07-13 22:10:18,716 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:18" (1/1) ... [2022-07-13 22:10:18,717 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:18" (1/1) ... [2022-07-13 22:10:18,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:10:18,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:10:18,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:10:18,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:10:18,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:18" (1/1) ... [2022-07-13 22:10:18,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:10:18,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:10:18,744 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) [2022-07-13 22:10:18,746 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 [2022-07-13 22:10:18,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:10:18,769 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:10:18,769 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:10:18,769 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:10:18,769 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:10:18,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:10:18,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:10:18,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:10:18,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 22:10:18,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 22:10:18,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:10:18,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:10:18,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:10:18,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:10:18,772 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:10:18,841 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:10:18,842 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:10:19,007 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:10:19,031 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:10:19,031 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 22:10:19,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:10:19 BoogieIcfgContainer [2022-07-13 22:10:19,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:10:19,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:10:19,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:10:19,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:10:19,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:10:18" (1/3) ... [2022-07-13 22:10:19,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5533c35b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:10:19, skipping insertion in model container [2022-07-13 22:10:19,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:18" (2/3) ... [2022-07-13 22:10:19,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5533c35b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:10:19, skipping insertion in model container [2022-07-13 22:10:19,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:10:19" (3/3) ... [2022-07-13 22:10:19,039 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2022-07-13 22:10:19,043 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:10:19,048 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:10:19,049 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:10:19,049 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:10:19,089 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 22:10:19,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 192 flow [2022-07-13 22:10:19,190 INFO L129 PetriNetUnfolder]: 6/86 cut-off events. [2022-07-13 22:10:19,190 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:10:19,193 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 6/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-07-13 22:10:19,193 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 88 transitions, 192 flow [2022-07-13 22:10:19,197 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 77 transitions, 166 flow [2022-07-13 22:10:19,211 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:10:19,217 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@5a11aa75, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5224854f [2022-07-13 22:10:19,217 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 22:10:19,239 INFO L129 PetriNetUnfolder]: 6/76 cut-off events. [2022-07-13 22:10:19,239 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:10:19,239 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:19,240 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:19,241 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:10:19,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:19,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1289479936, now seen corresponding path program 1 times [2022-07-13 22:10:19,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:19,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663919533] [2022-07-13 22:10:19,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:19,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:19,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:19,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663919533] [2022-07-13 22:10:19,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663919533] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:10:19,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:10:19,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:10:19,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924112724] [2022-07-13 22:10:19,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:10:19,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:10:19,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:19,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:10:19,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:10:19,458 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 88 [2022-07-13 22:10:19,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 166 flow. Second operand has 2 states, 2 states have (on average 78.5) internal successors, (157), 2 states have internal predecessors, (157), 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) [2022-07-13 22:10:19,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:19,462 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 88 [2022-07-13 22:10:19,462 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:19,510 INFO L129 PetriNetUnfolder]: 16/112 cut-off events. [2022-07-13 22:10:19,511 INFO L130 PetriNetUnfolder]: For 27/28 co-relation queries the response was YES. [2022-07-13 22:10:19,512 INFO L84 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 112 events. 16/112 cut-off events. For 27/28 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 178 event pairs, 5 based on Foata normal form. 14/115 useless extension candidates. Maximal degree in co-relation 82. Up to 27 conditions per place. [2022-07-13 22:10:19,514 INFO L132 encePairwiseOnDemand]: 84/88 looper letters, 7 selfloop transitions, 0 changer transitions 2/73 dead transitions. [2022-07-13 22:10:19,514 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 172 flow [2022-07-13 22:10:19,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:10:19,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:10:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 163 transitions. [2022-07-13 22:10:19,524 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9261363636363636 [2022-07-13 22:10:19,525 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 163 transitions. [2022-07-13 22:10:19,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 163 transitions. [2022-07-13 22:10:19,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:19,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 163 transitions. [2022-07-13 22:10:19,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 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) [2022-07-13 22:10:19,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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) [2022-07-13 22:10:19,537 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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) [2022-07-13 22:10:19,538 INFO L186 Difference]: Start difference. First operand has 78 places, 77 transitions, 166 flow. Second operand 2 states and 163 transitions. [2022-07-13 22:10:19,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 172 flow [2022-07-13 22:10:19,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:10:19,546 INFO L242 Difference]: Finished difference. Result has 75 places, 71 transitions, 146 flow [2022-07-13 22:10:19,548 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=146, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2022-07-13 22:10:19,551 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2022-07-13 22:10:19,551 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 146 flow [2022-07-13 22:10:19,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.5) internal successors, (157), 2 states have internal predecessors, (157), 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) [2022-07-13 22:10:19,552 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:19,552 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:19,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:10:19,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:10:19,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:19,554 INFO L85 PathProgramCache]: Analyzing trace with hash 693036951, now seen corresponding path program 1 times [2022-07-13 22:10:19,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:19,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151723073] [2022-07-13 22:10:19,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:19,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:19,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:19,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151723073] [2022-07-13 22:10:19,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151723073] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:10:19,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:10:19,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:10:19,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254980317] [2022-07-13 22:10:19,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:10:19,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:10:19,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:19,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:10:19,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:10:19,753 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 88 [2022-07-13 22:10:19,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 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) [2022-07-13 22:10:19,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:19,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 88 [2022-07-13 22:10:19,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:19,884 INFO L129 PetriNetUnfolder]: 44/170 cut-off events. [2022-07-13 22:10:19,885 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 22:10:19,886 INFO L84 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 170 events. 44/170 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 424 event pairs, 10 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 274. Up to 49 conditions per place. [2022-07-13 22:10:19,887 INFO L132 encePairwiseOnDemand]: 81/88 looper letters, 33 selfloop transitions, 7 changer transitions 0/87 dead transitions. [2022-07-13 22:10:19,888 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 87 transitions, 259 flow [2022-07-13 22:10:19,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:10:19,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:10:19,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 441 transitions. [2022-07-13 22:10:19,893 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7159090909090909 [2022-07-13 22:10:19,893 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 441 transitions. [2022-07-13 22:10:19,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 441 transitions. [2022-07-13 22:10:19,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:19,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 441 transitions. [2022-07-13 22:10:19,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 63.0) internal successors, (441), 7 states have internal predecessors, (441), 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) [2022-07-13 22:10:19,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 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) [2022-07-13 22:10:19,898 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 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) [2022-07-13 22:10:19,898 INFO L186 Difference]: Start difference. First operand has 75 places, 71 transitions, 146 flow. Second operand 7 states and 441 transitions. [2022-07-13 22:10:19,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 87 transitions, 259 flow [2022-07-13 22:10:19,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 259 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:10:19,901 INFO L242 Difference]: Finished difference. Result has 82 places, 75 transitions, 187 flow [2022-07-13 22:10:19,901 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=187, PETRI_PLACES=82, PETRI_TRANSITIONS=75} [2022-07-13 22:10:19,902 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 4 predicate places. [2022-07-13 22:10:19,902 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 187 flow [2022-07-13 22:10:19,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 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) [2022-07-13 22:10:19,903 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:19,903 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:19,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:10:19,903 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:10:19,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:19,904 INFO L85 PathProgramCache]: Analyzing trace with hash 251417684, now seen corresponding path program 1 times [2022-07-13 22:10:19,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:19,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837459179] [2022-07-13 22:10:19,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:19,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:20,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:20,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:20,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837459179] [2022-07-13 22:10:20,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837459179] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:10:20,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276248293] [2022-07-13 22:10:20,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:20,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:20,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:10:20,471 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) [2022-07-13 22:10:20,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:10:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:20,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 22:10:20,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:10:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:21,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:10:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:22,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276248293] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 22:10:22,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:10:22,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [13, 15] total 31 [2022-07-13 22:10:22,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865418489] [2022-07-13 22:10:22,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:10:22,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 22:10:22,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:22,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 22:10:22,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2022-07-13 22:10:22,141 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-07-13 22:10:22,142 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 75 transitions, 187 flow. Second operand has 14 states, 14 states have (on average 51.07142857142857) internal successors, (715), 14 states have internal predecessors, (715), 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) [2022-07-13 22:10:22,142 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:22,143 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-07-13 22:10:22,143 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:23,476 INFO L129 PetriNetUnfolder]: 210/635 cut-off events. [2022-07-13 22:10:23,476 INFO L130 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2022-07-13 22:10:23,478 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1307 conditions, 635 events. 210/635 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3236 event pairs, 31 based on Foata normal form. 1/589 useless extension candidates. Maximal degree in co-relation 1300. Up to 99 conditions per place. [2022-07-13 22:10:23,480 INFO L132 encePairwiseOnDemand]: 69/88 looper letters, 94 selfloop transitions, 55 changer transitions 16/204 dead transitions. [2022-07-13 22:10:23,480 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 204 transitions, 915 flow [2022-07-13 22:10:23,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-13 22:10:23,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-07-13 22:10:23,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1525 transitions. [2022-07-13 22:10:23,486 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6189123376623377 [2022-07-13 22:10:23,486 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1525 transitions. [2022-07-13 22:10:23,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1525 transitions. [2022-07-13 22:10:23,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:23,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1525 transitions. [2022-07-13 22:10:23,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 54.464285714285715) internal successors, (1525), 28 states have internal predecessors, (1525), 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) [2022-07-13 22:10:23,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 88.0) internal successors, (2552), 29 states have internal predecessors, (2552), 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) [2022-07-13 22:10:23,493 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 88.0) internal successors, (2552), 29 states have internal predecessors, (2552), 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) [2022-07-13 22:10:23,493 INFO L186 Difference]: Start difference. First operand has 82 places, 75 transitions, 187 flow. Second operand 28 states and 1525 transitions. [2022-07-13 22:10:23,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 204 transitions, 915 flow [2022-07-13 22:10:23,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 204 transitions, 901 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-13 22:10:23,497 INFO L242 Difference]: Finished difference. Result has 115 places, 125 transitions, 517 flow [2022-07-13 22:10:23,498 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=517, PETRI_PLACES=115, PETRI_TRANSITIONS=125} [2022-07-13 22:10:23,498 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 37 predicate places. [2022-07-13 22:10:23,498 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 125 transitions, 517 flow [2022-07-13 22:10:23,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 51.07142857142857) internal successors, (715), 14 states have internal predecessors, (715), 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) [2022-07-13 22:10:23,499 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:23,499 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:23,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 22:10:23,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:23,721 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:10:23,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:23,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1580700883, now seen corresponding path program 1 times [2022-07-13 22:10:23,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:23,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412556637] [2022-07-13 22:10:23,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:23,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:24,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:24,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412556637] [2022-07-13 22:10:24,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412556637] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:10:24,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703205391] [2022-07-13 22:10:24,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:24,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:24,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:10:24,417 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) [2022-07-13 22:10:24,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:10:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:24,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-13 22:10:24,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:10:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:25,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:10:27,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:27,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703205391] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:10:27,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:10:27,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-07-13 22:10:27,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054846697] [2022-07-13 22:10:27,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:10:27,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-13 22:10:27,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:27,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-13 22:10:27,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 22:10:27,161 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-07-13 22:10:27,162 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 125 transitions, 517 flow. Second operand has 37 states, 37 states have (on average 51.13513513513514) internal successors, (1892), 37 states have internal predecessors, (1892), 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) [2022-07-13 22:10:27,163 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:27,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-07-13 22:10:27,163 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:53,299 INFO L129 PetriNetUnfolder]: 680/2204 cut-off events. [2022-07-13 22:10:53,300 INFO L130 PetriNetUnfolder]: For 2952/2952 co-relation queries the response was YES. [2022-07-13 22:10:53,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5964 conditions, 2204 events. 680/2204 cut-off events. For 2952/2952 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18031 event pairs, 28 based on Foata normal form. 21/2222 useless extension candidates. Maximal degree in co-relation 5948. Up to 229 conditions per place. [2022-07-13 22:10:53,310 INFO L132 encePairwiseOnDemand]: 66/88 looper letters, 263 selfloop transitions, 182 changer transitions 210/694 dead transitions. [2022-07-13 22:10:53,310 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 694 transitions, 4500 flow [2022-07-13 22:10:53,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-07-13 22:10:53,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2022-07-13 22:10:53,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 7007 transitions. [2022-07-13 22:10:53,321 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.603219696969697 [2022-07-13 22:10:53,321 INFO L72 ComplementDD]: Start complementDD. Operand 132 states and 7007 transitions. [2022-07-13 22:10:53,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 132 states and 7007 transitions. [2022-07-13 22:10:53,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:53,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 132 states and 7007 transitions. [2022-07-13 22:10:53,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 133 states, 132 states have (on average 53.083333333333336) internal successors, (7007), 132 states have internal predecessors, (7007), 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) [2022-07-13 22:10:53,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 133 states, 133 states have (on average 88.0) internal successors, (11704), 133 states have internal predecessors, (11704), 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) [2022-07-13 22:10:53,348 INFO L81 ComplementDD]: Finished complementDD. Result has 133 states, 133 states have (on average 88.0) internal successors, (11704), 133 states have internal predecessors, (11704), 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) [2022-07-13 22:10:53,348 INFO L186 Difference]: Start difference. First operand has 115 places, 125 transitions, 517 flow. Second operand 132 states and 7007 transitions. [2022-07-13 22:10:53,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 694 transitions, 4500 flow [2022-07-13 22:10:53,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 694 transitions, 4324 flow, removed 82 selfloop flow, removed 9 redundant places. [2022-07-13 22:10:53,369 INFO L242 Difference]: Finished difference. Result has 321 places, 286 transitions, 2277 flow [2022-07-13 22:10:53,370 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=132, PETRI_FLOW=2277, PETRI_PLACES=321, PETRI_TRANSITIONS=286} [2022-07-13 22:10:53,370 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 243 predicate places. [2022-07-13 22:10:53,370 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 286 transitions, 2277 flow [2022-07-13 22:10:53,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 51.13513513513514) internal successors, (1892), 37 states have internal predecessors, (1892), 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) [2022-07-13 22:10:53,371 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:53,371 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-13 22:10:53,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 22:10:53,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-13 22:10:53,576 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:10:53,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:53,576 INFO L85 PathProgramCache]: Analyzing trace with hash -492420380, now seen corresponding path program 2 times [2022-07-13 22:10:53,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:53,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124866223] [2022-07-13 22:10:53,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:53,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:54,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:54,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124866223] [2022-07-13 22:10:54,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124866223] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:10:54,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28243942] [2022-07-13 22:10:54,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:10:54,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:54,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:10:54,372 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) [2022-07-13 22:10:54,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:10:54,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:10:54,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:10:54,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-13 22:10:54,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:10:55,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:55,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:10:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:58,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28243942] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:10:58,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:10:58,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 41 [2022-07-13 22:10:58,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879838545] [2022-07-13 22:10:58,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:10:58,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-13 22:10:58,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:58,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-13 22:10:58,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2022-07-13 22:10:58,266 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-07-13 22:10:58,268 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 286 transitions, 2277 flow. Second operand has 41 states, 41 states have (on average 51.048780487804876) internal successors, (2093), 41 states have internal predecessors, (2093), 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) [2022-07-13 22:10:58,268 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:58,268 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-07-13 22:10:58,268 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:12:02,772 INFO L129 PetriNetUnfolder]: 1056/3248 cut-off events. [2022-07-13 22:12:02,772 INFO L130 PetriNetUnfolder]: For 49102/49102 co-relation queries the response was YES. [2022-07-13 22:12:02,798 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17942 conditions, 3248 events. 1056/3248 cut-off events. For 49102/49102 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 28194 event pairs, 103 based on Foata normal form. 20/3246 useless extension candidates. Maximal degree in co-relation 17842. Up to 594 conditions per place. [2022-07-13 22:12:02,826 INFO L132 encePairwiseOnDemand]: 65/88 looper letters, 360 selfloop transitions, 407 changer transitions 126/932 dead transitions. [2022-07-13 22:12:02,826 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 932 transitions, 11652 flow [2022-07-13 22:12:02,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-07-13 22:12:02,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2022-07-13 22:12:02,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 7171 transitions. [2022-07-13 22:12:02,833 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5991811497326203 [2022-07-13 22:12:02,833 INFO L72 ComplementDD]: Start complementDD. Operand 136 states and 7171 transitions. [2022-07-13 22:12:02,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 136 states and 7171 transitions. [2022-07-13 22:12:02,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:12:02,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 136 states and 7171 transitions. [2022-07-13 22:12:02,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 137 states, 136 states have (on average 52.72794117647059) internal successors, (7171), 136 states have internal predecessors, (7171), 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) [2022-07-13 22:12:02,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 137 states, 137 states have (on average 88.0) internal successors, (12056), 137 states have internal predecessors, (12056), 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) [2022-07-13 22:12:02,859 INFO L81 ComplementDD]: Finished complementDD. Result has 137 states, 137 states have (on average 88.0) internal successors, (12056), 137 states have internal predecessors, (12056), 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) [2022-07-13 22:12:02,859 INFO L186 Difference]: Start difference. First operand has 321 places, 286 transitions, 2277 flow. Second operand 136 states and 7171 transitions. [2022-07-13 22:12:02,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 932 transitions, 11652 flow [2022-07-13 22:12:02,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 932 transitions, 8519 flow, removed 1559 selfloop flow, removed 70 redundant places. [2022-07-13 22:12:02,976 INFO L242 Difference]: Finished difference. Result has 401 places, 615 transitions, 6335 flow [2022-07-13 22:12:02,976 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=1894, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=136, PETRI_FLOW=6335, PETRI_PLACES=401, PETRI_TRANSITIONS=615} [2022-07-13 22:12:02,977 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 323 predicate places. [2022-07-13 22:12:02,977 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 615 transitions, 6335 flow [2022-07-13 22:12:02,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 51.048780487804876) internal successors, (2093), 41 states have internal predecessors, (2093), 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) [2022-07-13 22:12:02,978 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:12:02,978 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-13 22:12:02,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-13 22:12:03,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:12:03,194 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:12:03,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:12:03,194 INFO L85 PathProgramCache]: Analyzing trace with hash -959376178, now seen corresponding path program 3 times [2022-07-13 22:12:03,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:12:03,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137381867] [2022-07-13 22:12:03,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:12:03,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:12:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:04,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:12:04,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137381867] [2022-07-13 22:12:04,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137381867] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:12:04,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388935419] [2022-07-13 22:12:04,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:12:04,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:12:04,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:12:04,244 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) [2022-07-13 22:12:04,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 22:12:04,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 22:12:04,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:12:04,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-13 22:12:04,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:12:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:05,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:12:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:08,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388935419] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:12:08,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:12:08,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 37 [2022-07-13 22:12:08,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982332639] [2022-07-13 22:12:08,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:12:08,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-13 22:12:08,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:12:08,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-13 22:12:08,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 22:12:08,369 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-07-13 22:12:08,371 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 615 transitions, 6335 flow. Second operand has 37 states, 37 states have (on average 51.270270270270274) internal successors, (1897), 37 states have internal predecessors, (1897), 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) [2022-07-13 22:12:08,371 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:12:08,371 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-07-13 22:12:08,371 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:12:30,482 INFO L129 PetriNetUnfolder]: 1327/3973 cut-off events. [2022-07-13 22:12:30,482 INFO L130 PetriNetUnfolder]: For 48506/48506 co-relation queries the response was YES. [2022-07-13 22:12:30,520 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22483 conditions, 3973 events. 1327/3973 cut-off events. For 48506/48506 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 35632 event pairs, 122 based on Foata normal form. 13/3962 useless extension candidates. Maximal degree in co-relation 22362. Up to 1045 conditions per place. [2022-07-13 22:12:30,542 INFO L132 encePairwiseOnDemand]: 65/88 looper letters, 483 selfloop transitions, 504 changer transitions 78/1104 dead transitions. [2022-07-13 22:12:30,542 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 1104 transitions, 14883 flow [2022-07-13 22:12:30,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-13 22:12:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2022-07-13 22:12:30,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 4778 transitions. [2022-07-13 22:12:30,547 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6032828282828283 [2022-07-13 22:12:30,547 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 4778 transitions. [2022-07-13 22:12:30,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 4778 transitions. [2022-07-13 22:12:30,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:12:30,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 4778 transitions. [2022-07-13 22:12:30,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 53.08888888888889) internal successors, (4778), 90 states have internal predecessors, (4778), 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) [2022-07-13 22:12:30,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 88.0) internal successors, (8008), 91 states have internal predecessors, (8008), 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) [2022-07-13 22:12:30,561 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 88.0) internal successors, (8008), 91 states have internal predecessors, (8008), 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) [2022-07-13 22:12:30,561 INFO L186 Difference]: Start difference. First operand has 401 places, 615 transitions, 6335 flow. Second operand 90 states and 4778 transitions. [2022-07-13 22:12:30,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 1104 transitions, 14883 flow [2022-07-13 22:12:30,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 1104 transitions, 13461 flow, removed 671 selfloop flow, removed 47 redundant places. [2022-07-13 22:12:30,847 INFO L242 Difference]: Finished difference. Result has 458 places, 843 transitions, 10205 flow [2022-07-13 22:12:30,848 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=5645, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=10205, PETRI_PLACES=458, PETRI_TRANSITIONS=843} [2022-07-13 22:12:30,848 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 380 predicate places. [2022-07-13 22:12:30,849 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 843 transitions, 10205 flow [2022-07-13 22:12:30,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 51.270270270270274) internal successors, (1897), 37 states have internal predecessors, (1897), 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) [2022-07-13 22:12:30,850 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:12:30,850 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] [2022-07-13 22:12:30,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-13 22:12:31,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:12:31,050 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:12:31,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:12:31,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1488959734, now seen corresponding path program 4 times [2022-07-13 22:12:31,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:12:31,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184308141] [2022-07-13 22:12:31,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:12:31,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:12:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:31,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:31,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:12:31,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184308141] [2022-07-13 22:12:31,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184308141] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:12:31,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:12:31,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:12:31,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337327647] [2022-07-13 22:12:31,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:12:31,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:12:31,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:12:31,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:12:31,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:12:31,106 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 88 [2022-07-13 22:12:31,107 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 843 transitions, 10205 flow. Second operand has 5 states, 5 states have (on average 68.6) internal successors, (343), 5 states have internal predecessors, (343), 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) [2022-07-13 22:12:31,107 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:12:31,107 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 88 [2022-07-13 22:12:31,107 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:12:32,515 INFO L129 PetriNetUnfolder]: 1768/4454 cut-off events. [2022-07-13 22:12:32,515 INFO L130 PetriNetUnfolder]: For 83825/83825 co-relation queries the response was YES. [2022-07-13 22:12:32,557 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30058 conditions, 4454 events. 1768/4454 cut-off events. For 83825/83825 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 37089 event pairs, 25 based on Foata normal form. 58/4501 useless extension candidates. Maximal degree in co-relation 29919. Up to 908 conditions per place. [2022-07-13 22:12:32,582 INFO L132 encePairwiseOnDemand]: 81/88 looper letters, 1306 selfloop transitions, 369 changer transitions 0/1727 dead transitions. [2022-07-13 22:12:32,582 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 1727 transitions, 25546 flow [2022-07-13 22:12:32,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:12:32,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:12:32,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 496 transitions. [2022-07-13 22:12:32,584 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8051948051948052 [2022-07-13 22:12:32,584 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 496 transitions. [2022-07-13 22:12:32,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 496 transitions. [2022-07-13 22:12:32,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:12:32,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 496 transitions. [2022-07-13 22:12:32,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.85714285714286) internal successors, (496), 7 states have internal predecessors, (496), 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) [2022-07-13 22:12:32,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 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) [2022-07-13 22:12:32,586 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 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) [2022-07-13 22:12:32,586 INFO L186 Difference]: Start difference. First operand has 458 places, 843 transitions, 10205 flow. Second operand 7 states and 496 transitions. [2022-07-13 22:12:32,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 1727 transitions, 25546 flow [2022-07-13 22:12:33,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 1727 transitions, 24543 flow, removed 377 selfloop flow, removed 48 redundant places. [2022-07-13 22:12:33,142 INFO L242 Difference]: Finished difference. Result has 398 places, 1043 transitions, 13362 flow [2022-07-13 22:12:33,143 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=9459, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=827, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13362, PETRI_PLACES=398, PETRI_TRANSITIONS=1043} [2022-07-13 22:12:33,144 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 320 predicate places. [2022-07-13 22:12:33,144 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 1043 transitions, 13362 flow [2022-07-13 22:12:33,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.6) internal successors, (343), 5 states have internal predecessors, (343), 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) [2022-07-13 22:12:33,144 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:12:33,145 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:12:33,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 22:12:33,145 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:12:33,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:12:33,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1155462312, now seen corresponding path program 2 times [2022-07-13 22:12:33,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:12:33,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699893234] [2022-07-13 22:12:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:12:33,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:12:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:34,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:12:34,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699893234] [2022-07-13 22:12:34,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699893234] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:12:34,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449298987] [2022-07-13 22:12:34,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:12:34,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:12:34,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:12:34,114 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) [2022-07-13 22:12:34,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 22:12:34,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:12:34,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:12:34,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-13 22:12:34,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:12:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:35,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:12:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:36,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449298987] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:12:36,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:12:36,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 19] total 48 [2022-07-13 22:12:36,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143710901] [2022-07-13 22:12:36,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:12:36,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-13 22:12:36,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:12:36,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-13 22:12:36,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=1856, Unknown=0, NotChecked=0, Total=2256 [2022-07-13 22:12:36,570 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-07-13 22:12:36,572 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 1043 transitions, 13362 flow. Second operand has 48 states, 48 states have (on average 50.958333333333336) internal successors, (2446), 48 states have internal predecessors, (2446), 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) [2022-07-13 22:12:36,572 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:12:36,572 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-07-13 22:12:36,572 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:13:10,487 INFO L129 PetriNetUnfolder]: 2666/6861 cut-off events. [2022-07-13 22:13:10,487 INFO L130 PetriNetUnfolder]: For 123709/123709 co-relation queries the response was YES. [2022-07-13 22:13:10,551 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49459 conditions, 6861 events. 2666/6861 cut-off events. For 123709/123709 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 62401 event pairs, 73 based on Foata normal form. 13/6866 useless extension candidates. Maximal degree in co-relation 49341. Up to 1291 conditions per place. [2022-07-13 22:13:10,587 INFO L132 encePairwiseOnDemand]: 66/88 looper letters, 628 selfloop transitions, 1182 changer transitions 66/1915 dead transitions. [2022-07-13 22:13:10,588 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 1915 transitions, 30527 flow [2022-07-13 22:13:10,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-07-13 22:13:10,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2022-07-13 22:13:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 6361 transitions. [2022-07-13 22:13:10,593 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.597389181066867 [2022-07-13 22:13:10,593 INFO L72 ComplementDD]: Start complementDD. Operand 121 states and 6361 transitions. [2022-07-13 22:13:10,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 6361 transitions. [2022-07-13 22:13:10,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:13:10,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 121 states and 6361 transitions. [2022-07-13 22:13:10,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 122 states, 121 states have (on average 52.570247933884296) internal successors, (6361), 121 states have internal predecessors, (6361), 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) [2022-07-13 22:13:10,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 122 states, 122 states have (on average 88.0) internal successors, (10736), 122 states have internal predecessors, (10736), 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) [2022-07-13 22:13:10,611 INFO L81 ComplementDD]: Finished complementDD. Result has 122 states, 122 states have (on average 88.0) internal successors, (10736), 122 states have internal predecessors, (10736), 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) [2022-07-13 22:13:10,611 INFO L186 Difference]: Start difference. First operand has 398 places, 1043 transitions, 13362 flow. Second operand 121 states and 6361 transitions. [2022-07-13 22:13:10,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 1915 transitions, 30527 flow [2022-07-13 22:13:11,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 1915 transitions, 29995 flow, removed 266 selfloop flow, removed 0 redundant places. [2022-07-13 22:13:11,790 INFO L242 Difference]: Finished difference. Result has 563 places, 1534 transitions, 25579 flow [2022-07-13 22:13:11,791 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=13248, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1043, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=729, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=121, PETRI_FLOW=25579, PETRI_PLACES=563, PETRI_TRANSITIONS=1534} [2022-07-13 22:13:11,792 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 485 predicate places. [2022-07-13 22:13:11,792 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 1534 transitions, 25579 flow [2022-07-13 22:13:11,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 50.958333333333336) internal successors, (2446), 48 states have internal predecessors, (2446), 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) [2022-07-13 22:13:11,793 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:13:11,793 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:13:11,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-13 22:13:12,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:13:12,009 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:13:12,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:13:12,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1450559315, now seen corresponding path program 5 times [2022-07-13 22:13:12,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:13:12,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489667727] [2022-07-13 22:13:12,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:13:12,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:13:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:13:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:13:12,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:13:12,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489667727] [2022-07-13 22:13:12,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489667727] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:13:12,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509843391] [2022-07-13 22:13:12,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:13:12,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:13:12,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:13:12,990 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:13:12,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 22:13:13,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-13 22:13:13,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:13:13,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 22:13:13,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:13:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:13:14,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:13:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:13:21,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509843391] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:13:21,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:13:21,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 20] total 46 [2022-07-13 22:13:21,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890375577] [2022-07-13 22:13:21,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:13:21,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-13 22:13:21,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:13:21,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-13 22:13:21,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1735, Unknown=0, NotChecked=0, Total=2070 [2022-07-13 22:13:21,315 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 88 [2022-07-13 22:13:21,316 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 1534 transitions, 25579 flow. Second operand has 46 states, 46 states have (on average 51.108695652173914) internal successors, (2351), 46 states have internal predecessors, (2351), 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) [2022-07-13 22:13:21,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:13:21,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 88 [2022-07-13 22:13:21,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:13:41,881 WARN L233 SmtUtils]: Spent 11.45s on a formula simplification. DAG size of input: 192 DAG size of output: 182 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 22:14:05,614 WARN L233 SmtUtils]: Spent 11.90s on a formula simplification. DAG size of input: 199 DAG size of output: 189 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)