./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-min-max-inc-dec.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 a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:48:47,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:48:47,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:48:47,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:48:47,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:48:47,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:48:47,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:48:47,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:48:47,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:48:47,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:48:47,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:48:47,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:48:47,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:48:47,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:48:47,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:48:47,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:48:47,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:48:47,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:48:47,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:48:47,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:48:47,682 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:48:47,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:48:47,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:48:47,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:48:47,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:48:47,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:48:47,689 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:48:47,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:48:47,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:48:47,690 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:48:47,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:48:47,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:48:47,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:48:47,695 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:48:47,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:48:47,697 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:48:47,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:48:47,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:48:47,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:48:47,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:48:47,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:48:47,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:48:47,702 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:48:47,732 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:48:47,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:48:47,738 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:48:47,738 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:48:47,739 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:48:47,739 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:48:47,740 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:48:47,740 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:48:47,740 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:48:47,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:48:47,741 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:48:47,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:48:47,741 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:48:47,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:48:47,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:48:47,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:48:47,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:48:47,742 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:48:47,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:48:47,743 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:48:47,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:48:47,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:48:47,744 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:48:47,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:48:47,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:48:47,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:48:47,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:48:47,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:48:47,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:48:47,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:48:47,746 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:48:47,747 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:48:47,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:48:47,747 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a1648913be4b4e88120f8ece4966a58804b334c451c87254dfc42f8e396f396f [2022-07-22 21:48:47,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:48:48,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:48:48,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:48:48,023 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:48:48,024 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:48:48,026 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c [2022-07-22 21:48:48,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd1557edc/18eb56c7d84a40549569faa5d75b635b/FLAG8ed7da5e9 [2022-07-22 21:48:48,509 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:48:48,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-inc-dec.wvr.c [2022-07-22 21:48:48,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd1557edc/18eb56c7d84a40549569faa5d75b635b/FLAG8ed7da5e9 [2022-07-22 21:48:48,527 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd1557edc/18eb56c7d84a40549569faa5d75b635b [2022-07-22 21:48:48,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:48:48,530 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:48:48,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:48:48,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:48:48,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:48:48,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:48:48" (1/1) ... [2022-07-22 21:48:48,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a3d490e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:48, skipping insertion in model container [2022-07-22 21:48:48,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:48:48" (1/1) ... [2022-07-22 21:48:48,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:48:48,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:48:48,729 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-min-max-inc-dec.wvr.c[3271,3284] [2022-07-22 21:48:48,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:48:48,741 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:48:48,766 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-min-max-inc-dec.wvr.c[3271,3284] [2022-07-22 21:48:48,776 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:48:48,788 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:48:48,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:48 WrapperNode [2022-07-22 21:48:48,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:48:48,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:48:48,790 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:48:48,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:48:48,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:48" (1/1) ... [2022-07-22 21:48:48,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:48" (1/1) ... [2022-07-22 21:48:48,830 INFO L137 Inliner]: procedures = 27, calls = 75, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 174 [2022-07-22 21:48:48,831 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:48:48,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:48:48,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:48:48,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:48:48,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:48" (1/1) ... [2022-07-22 21:48:48,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:48" (1/1) ... [2022-07-22 21:48:48,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:48" (1/1) ... [2022-07-22 21:48:48,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:48" (1/1) ... [2022-07-22 21:48:48,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:48" (1/1) ... [2022-07-22 21:48:48,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:48" (1/1) ... [2022-07-22 21:48:48,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:48" (1/1) ... [2022-07-22 21:48:48,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:48:48,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:48:48,894 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:48:48,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:48:48,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:48" (1/1) ... [2022-07-22 21:48:48,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:48:48,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:48,932 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) [2022-07-22 21:48:48,946 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 [2022-07-22 21:48:48,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:48:48,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:48:48,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:48:48,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:48:48,974 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:48:48,974 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:48:48,974 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:48:48,974 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:48:48,974 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-22 21:48:48,975 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-22 21:48:48,975 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-22 21:48:48,975 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-22 21:48:48,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:48:48,975 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-07-22 21:48:48,976 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-07-22 21:48:48,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:48:48,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:48:48,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:48:48,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:48:48,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:48:48,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:48:48,978 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:48:49,061 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:48:49,063 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:48:49,370 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:48:49,468 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:48:49,468 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-22 21:48:49,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:48:49 BoogieIcfgContainer [2022-07-22 21:48:49,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:48:49,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:48:49,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:48:49,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:48:49,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:48:48" (1/3) ... [2022-07-22 21:48:49,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a90ebd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:48:49, skipping insertion in model container [2022-07-22 21:48:49,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:48" (2/3) ... [2022-07-22 21:48:49,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a90ebd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:48:49, skipping insertion in model container [2022-07-22 21:48:49,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:48:49" (3/3) ... [2022-07-22 21:48:49,481 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc-dec.wvr.c [2022-07-22 21:48:49,487 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:48:49,494 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:48:49,495 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:48:49,495 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:48:49,609 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-22 21:48:49,681 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 197 places, 195 transitions, 430 flow [2022-07-22 21:48:49,747 INFO L129 PetriNetUnfolder]: 14/190 cut-off events. [2022-07-22 21:48:49,747 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-22 21:48:49,755 INFO L84 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 190 events. 14/190 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 133 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 153. Up to 2 conditions per place. [2022-07-22 21:48:49,755 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 195 transitions, 430 flow [2022-07-22 21:48:49,760 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 175 transitions, 380 flow [2022-07-22 21:48:49,769 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:48:49,779 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@eeb384, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@ee8cc0e [2022-07-22 21:48:49,780 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-22 21:48:49,830 INFO L129 PetriNetUnfolder]: 14/174 cut-off events. [2022-07-22 21:48:49,830 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-22 21:48:49,831 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:49,832 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:49,832 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:48:49,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:49,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1561513117, now seen corresponding path program 1 times [2022-07-22 21:48:49,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:49,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930240471] [2022-07-22 21:48:49,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:49,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:50,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:50,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930240471] [2022-07-22 21:48:50,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930240471] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:48:50,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:48:50,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:48:50,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869215136] [2022-07-22 21:48:50,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:48:50,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:48:50,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:50,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:48:50,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:48:50,145 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 195 [2022-07-22 21:48:50,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 175 transitions, 380 flow. Second operand has 2 states, 2 states have (on average 176.5) internal successors, (353), 2 states have internal predecessors, (353), 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) [2022-07-22 21:48:50,158 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:50,158 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 195 [2022-07-22 21:48:50,159 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:50,439 INFO L129 PetriNetUnfolder]: 308/1173 cut-off events. [2022-07-22 21:48:50,440 INFO L130 PetriNetUnfolder]: For 136/136 co-relation queries the response was YES. [2022-07-22 21:48:50,450 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1738 conditions, 1173 events. 308/1173 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 7396 event pairs, 205 based on Foata normal form. 235/1255 useless extension candidates. Maximal degree in co-relation 1528. Up to 402 conditions per place. [2022-07-22 21:48:50,460 INFO L132 encePairwiseOnDemand]: 186/195 looper letters, 16 selfloop transitions, 0 changer transitions 4/166 dead transitions. [2022-07-22 21:48:50,461 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 166 transitions, 394 flow [2022-07-22 21:48:50,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:48:50,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:48:50,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 363 transitions. [2022-07-22 21:48:50,478 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9307692307692308 [2022-07-22 21:48:50,479 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 363 transitions. [2022-07-22 21:48:50,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 363 transitions. [2022-07-22 21:48:50,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:50,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 363 transitions. [2022-07-22 21:48:50,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 181.5) internal successors, (363), 2 states have internal predecessors, (363), 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) [2022-07-22 21:48:50,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 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) [2022-07-22 21:48:50,496 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 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) [2022-07-22 21:48:50,498 INFO L186 Difference]: Start difference. First operand has 177 places, 175 transitions, 380 flow. Second operand 2 states and 363 transitions. [2022-07-22 21:48:50,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 166 transitions, 394 flow [2022-07-22 21:48:50,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 166 transitions, 374 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-07-22 21:48:50,509 INFO L242 Difference]: Finished difference. Result has 168 places, 162 transitions, 334 flow [2022-07-22 21:48:50,511 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=334, PETRI_PLACES=168, PETRI_TRANSITIONS=162} [2022-07-22 21:48:50,515 INFO L279 CegarLoopForPetriNet]: 177 programPoint places, -9 predicate places. [2022-07-22 21:48:50,516 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 162 transitions, 334 flow [2022-07-22 21:48:50,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 176.5) internal successors, (353), 2 states have internal predecessors, (353), 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) [2022-07-22 21:48:50,517 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:50,517 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:50,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:48:50,518 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:48:50,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:50,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1896277998, now seen corresponding path program 1 times [2022-07-22 21:48:50,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:50,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084929213] [2022-07-22 21:48:50,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:50,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:50,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:50,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084929213] [2022-07-22 21:48:50,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084929213] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:48:50,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:48:50,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:48:50,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376071042] [2022-07-22 21:48:50,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:48:50,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:48:50,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:50,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:48:50,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:48:50,947 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 195 [2022-07-22 21:48:50,948 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 162 transitions, 334 flow. Second operand has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 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) [2022-07-22 21:48:50,949 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:50,949 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 195 [2022-07-22 21:48:50,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:52,971 INFO L129 PetriNetUnfolder]: 7778/13886 cut-off events. [2022-07-22 21:48:52,972 INFO L130 PetriNetUnfolder]: For 252/252 co-relation queries the response was YES. [2022-07-22 21:48:53,022 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25159 conditions, 13886 events. 7778/13886 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 118912 event pairs, 3679 based on Foata normal form. 0/11404 useless extension candidates. Maximal degree in co-relation 25156. Up to 6270 conditions per place. [2022-07-22 21:48:53,124 INFO L132 encePairwiseOnDemand]: 189/195 looper letters, 60 selfloop transitions, 5 changer transitions 0/181 dead transitions. [2022-07-22 21:48:53,124 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 181 transitions, 506 flow [2022-07-22 21:48:53,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:48:53,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:48:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 876 transitions. [2022-07-22 21:48:53,129 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7487179487179487 [2022-07-22 21:48:53,129 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 876 transitions. [2022-07-22 21:48:53,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 876 transitions. [2022-07-22 21:48:53,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:53,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 876 transitions. [2022-07-22 21:48:53,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:53,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 195.0) internal successors, (1365), 7 states have internal predecessors, (1365), 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) [2022-07-22 21:48:53,138 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 195.0) internal successors, (1365), 7 states have internal predecessors, (1365), 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) [2022-07-22 21:48:53,138 INFO L186 Difference]: Start difference. First operand has 168 places, 162 transitions, 334 flow. Second operand 6 states and 876 transitions. [2022-07-22 21:48:53,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 181 transitions, 506 flow [2022-07-22 21:48:53,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 181 transitions, 506 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:48:53,145 INFO L242 Difference]: Finished difference. Result has 170 places, 163 transitions, 352 flow [2022-07-22 21:48:53,145 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=352, PETRI_PLACES=170, PETRI_TRANSITIONS=163} [2022-07-22 21:48:53,146 INFO L279 CegarLoopForPetriNet]: 177 programPoint places, -7 predicate places. [2022-07-22 21:48:53,146 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 163 transitions, 352 flow [2022-07-22 21:48:53,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 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) [2022-07-22 21:48:53,147 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:53,148 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:53,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:48:53,148 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:48:53,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:53,151 INFO L85 PathProgramCache]: Analyzing trace with hash -178980570, now seen corresponding path program 1 times [2022-07-22 21:48:53,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:53,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199677026] [2022-07-22 21:48:53,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:53,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:53,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:53,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199677026] [2022-07-22 21:48:53,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199677026] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:48:53,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:48:53,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:48:53,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433920338] [2022-07-22 21:48:53,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:48:53,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:48:53,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:53,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:48:53,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:48:53,392 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 195 [2022-07-22 21:48:53,394 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 163 transitions, 352 flow. Second operand has 7 states, 7 states have (on average 147.57142857142858) internal successors, (1033), 7 states have internal predecessors, (1033), 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) [2022-07-22 21:48:53,394 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:53,394 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 195 [2022-07-22 21:48:53,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:55,057 INFO L129 PetriNetUnfolder]: 9402/14367 cut-off events. [2022-07-22 21:48:55,057 INFO L130 PetriNetUnfolder]: For 1874/1874 co-relation queries the response was YES. [2022-07-22 21:48:55,116 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29492 conditions, 14367 events. 9402/14367 cut-off events. For 1874/1874 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 103839 event pairs, 7029 based on Foata normal form. 225/11694 useless extension candidates. Maximal degree in co-relation 29487. Up to 10130 conditions per place. [2022-07-22 21:48:55,300 INFO L132 encePairwiseOnDemand]: 186/195 looper letters, 41 selfloop transitions, 6 changer transitions 36/203 dead transitions. [2022-07-22 21:48:55,302 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 203 transitions, 613 flow [2022-07-22 21:48:55,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:48:55,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:48:55,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1227 transitions. [2022-07-22 21:48:55,305 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7865384615384615 [2022-07-22 21:48:55,305 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1227 transitions. [2022-07-22 21:48:55,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1227 transitions. [2022-07-22 21:48:55,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:55,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1227 transitions. [2022-07-22 21:48:55,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 153.375) internal successors, (1227), 8 states have internal predecessors, (1227), 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) [2022-07-22 21:48:55,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 195.0) internal successors, (1755), 9 states have internal predecessors, (1755), 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) [2022-07-22 21:48:55,316 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 195.0) internal successors, (1755), 9 states have internal predecessors, (1755), 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) [2022-07-22 21:48:55,316 INFO L186 Difference]: Start difference. First operand has 170 places, 163 transitions, 352 flow. Second operand 8 states and 1227 transitions. [2022-07-22 21:48:55,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 203 transitions, 613 flow [2022-07-22 21:48:55,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 203 transitions, 604 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:48:55,321 INFO L242 Difference]: Finished difference. Result has 176 places, 164 transitions, 368 flow [2022-07-22 21:48:55,322 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=368, PETRI_PLACES=176, PETRI_TRANSITIONS=164} [2022-07-22 21:48:55,322 INFO L279 CegarLoopForPetriNet]: 177 programPoint places, -1 predicate places. [2022-07-22 21:48:55,323 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 164 transitions, 368 flow [2022-07-22 21:48:55,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 147.57142857142858) internal successors, (1033), 7 states have internal predecessors, (1033), 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) [2022-07-22 21:48:55,324 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:55,324 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:55,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:48:55,324 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:48:55,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:55,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1019555897, now seen corresponding path program 1 times [2022-07-22 21:48:55,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:55,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216743549] [2022-07-22 21:48:55,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:55,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:48:55,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:55,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216743549] [2022-07-22 21:48:55,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216743549] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:55,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680056079] [2022-07-22 21:48:55,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:55,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:55,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:55,435 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) [2022-07-22 21:48:55,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:48:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:55,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:48:55,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:48:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:48:55,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:48:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:48:55,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680056079] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:55,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:48:55,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-22 21:48:55,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798886262] [2022-07-22 21:48:55,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:48:55,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:48:55,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:55,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:48:55,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:48:55,982 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 195 [2022-07-22 21:48:55,983 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 164 transitions, 368 flow. Second operand has 7 states, 7 states have (on average 147.85714285714286) internal successors, (1035), 7 states have internal predecessors, (1035), 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) [2022-07-22 21:48:55,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:55,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 195 [2022-07-22 21:48:55,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:57,480 INFO L129 PetriNetUnfolder]: 7854/13534 cut-off events. [2022-07-22 21:48:57,480 INFO L130 PetriNetUnfolder]: For 1202/1534 co-relation queries the response was YES. [2022-07-22 21:48:57,536 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26210 conditions, 13534 events. 7854/13534 cut-off events. For 1202/1534 co-relation queries the response was YES. Maximal size of possible extension queue 794. Compared 107821 event pairs, 5557 based on Foata normal form. 332/11650 useless extension candidates. Maximal degree in co-relation 26202. Up to 4879 conditions per place. [2022-07-22 21:48:57,611 INFO L132 encePairwiseOnDemand]: 187/195 looper letters, 52 selfloop transitions, 7 changer transitions 0/180 dead transitions. [2022-07-22 21:48:57,611 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 180 transitions, 526 flow [2022-07-22 21:48:57,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:48:57,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:48:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1060 transitions. [2022-07-22 21:48:57,614 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7765567765567766 [2022-07-22 21:48:57,615 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1060 transitions. [2022-07-22 21:48:57,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1060 transitions. [2022-07-22 21:48:57,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:57,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1060 transitions. [2022-07-22 21:48:57,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 151.42857142857142) internal successors, (1060), 7 states have internal predecessors, (1060), 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) [2022-07-22 21:48:57,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 195.0) internal successors, (1560), 8 states have internal predecessors, (1560), 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) [2022-07-22 21:48:57,621 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 195.0) internal successors, (1560), 8 states have internal predecessors, (1560), 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) [2022-07-22 21:48:57,622 INFO L186 Difference]: Start difference. First operand has 176 places, 164 transitions, 368 flow. Second operand 7 states and 1060 transitions. [2022-07-22 21:48:57,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 180 transitions, 526 flow [2022-07-22 21:48:57,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 180 transitions, 510 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-07-22 21:48:57,631 INFO L242 Difference]: Finished difference. Result has 177 places, 166 transitions, 387 flow [2022-07-22 21:48:57,632 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=387, PETRI_PLACES=177, PETRI_TRANSITIONS=166} [2022-07-22 21:48:57,633 INFO L279 CegarLoopForPetriNet]: 177 programPoint places, 0 predicate places. [2022-07-22 21:48:57,633 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 166 transitions, 387 flow [2022-07-22 21:48:57,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 147.85714285714286) internal successors, (1035), 7 states have internal predecessors, (1035), 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) [2022-07-22 21:48:57,634 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:57,634 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:57,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:48:57,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:57,850 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:48:57,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:57,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1556197859, now seen corresponding path program 1 times [2022-07-22 21:48:57,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:57,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691387412] [2022-07-22 21:48:57,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:57,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:48:58,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:58,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691387412] [2022-07-22 21:48:58,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691387412] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:58,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896448888] [2022-07-22 21:48:58,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:58,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:48:58,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:58,099 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) [2022-07-22 21:48:58,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:48:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:58,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:48:58,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:48:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:48:58,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:48:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:48:58,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896448888] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:48:58,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:48:58,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-22 21:48:58,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661775436] [2022-07-22 21:48:58,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:48:58,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:48:58,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:58,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:48:58,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:48:58,478 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 195 [2022-07-22 21:48:58,479 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 166 transitions, 387 flow. Second operand has 7 states, 7 states have (on average 148.14285714285714) internal successors, (1037), 7 states have internal predecessors, (1037), 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) [2022-07-22 21:48:58,479 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:58,479 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 195 [2022-07-22 21:48:58,479 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:59,675 INFO L129 PetriNetUnfolder]: 8314/12454 cut-off events. [2022-07-22 21:48:59,675 INFO L130 PetriNetUnfolder]: For 2714/4283 co-relation queries the response was YES. [2022-07-22 21:48:59,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26590 conditions, 12454 events. 8314/12454 cut-off events. For 2714/4283 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 83056 event pairs, 3015 based on Foata normal form. 1569/12297 useless extension candidates. Maximal degree in co-relation 26581. Up to 5481 conditions per place. [2022-07-22 21:48:59,815 INFO L132 encePairwiseOnDemand]: 187/195 looper letters, 54 selfloop transitions, 7 changer transitions 0/182 dead transitions. [2022-07-22 21:48:59,815 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 182 transitions, 555 flow [2022-07-22 21:48:59,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:48:59,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:48:59,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1060 transitions. [2022-07-22 21:48:59,818 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7765567765567766 [2022-07-22 21:48:59,818 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1060 transitions. [2022-07-22 21:48:59,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1060 transitions. [2022-07-22 21:48:59,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:59,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1060 transitions. [2022-07-22 21:48:59,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 151.42857142857142) internal successors, (1060), 7 states have internal predecessors, (1060), 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) [2022-07-22 21:48:59,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 195.0) internal successors, (1560), 8 states have internal predecessors, (1560), 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) [2022-07-22 21:48:59,824 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 195.0) internal successors, (1560), 8 states have internal predecessors, (1560), 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) [2022-07-22 21:48:59,824 INFO L186 Difference]: Start difference. First operand has 177 places, 166 transitions, 387 flow. Second operand 7 states and 1060 transitions. [2022-07-22 21:48:59,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 182 transitions, 555 flow [2022-07-22 21:48:59,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 182 transitions, 546 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:48:59,829 INFO L242 Difference]: Finished difference. Result has 181 places, 167 transitions, 406 flow [2022-07-22 21:48:59,829 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=406, PETRI_PLACES=181, PETRI_TRANSITIONS=167} [2022-07-22 21:48:59,830 INFO L279 CegarLoopForPetriNet]: 177 programPoint places, 4 predicate places. [2022-07-22 21:48:59,830 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 167 transitions, 406 flow [2022-07-22 21:48:59,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 148.14285714285714) internal successors, (1037), 7 states have internal predecessors, (1037), 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) [2022-07-22 21:48:59,831 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:59,831 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:59,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:49:00,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:00,056 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:49:00,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:00,056 INFO L85 PathProgramCache]: Analyzing trace with hash 627197613, now seen corresponding path program 1 times [2022-07-22 21:49:00,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:00,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944624562] [2022-07-22 21:49:00,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:00,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:49:00,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:00,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944624562] [2022-07-22 21:49:00,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944624562] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:00,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637911950] [2022-07-22 21:49:00,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:00,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:00,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:49:00,216 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) [2022-07-22 21:49:00,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:49:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:00,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:49:00,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:49:00,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:49:00,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:49:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:49:00,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637911950] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:00,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:49:00,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 7] total 14 [2022-07-22 21:49:00,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50646956] [2022-07-22 21:49:00,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:49:00,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:49:00,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:00,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:49:00,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:49:00,623 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 195 [2022-07-22 21:49:00,624 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 167 transitions, 406 flow. Second operand has 7 states, 7 states have (on average 148.42857142857142) internal successors, (1039), 7 states have internal predecessors, (1039), 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) [2022-07-22 21:49:00,624 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:00,624 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 195 [2022-07-22 21:49:00,624 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:01,929 INFO L129 PetriNetUnfolder]: 8648/15503 cut-off events. [2022-07-22 21:49:01,929 INFO L130 PetriNetUnfolder]: For 5487/8491 co-relation queries the response was YES. [2022-07-22 21:49:02,002 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32397 conditions, 15503 events. 8648/15503 cut-off events. For 5487/8491 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 128036 event pairs, 4061 based on Foata normal form. 3004/17667 useless extension candidates. Maximal degree in co-relation 32386. Up to 6489 conditions per place. [2022-07-22 21:49:02,092 INFO L132 encePairwiseOnDemand]: 187/195 looper letters, 57 selfloop transitions, 7 changer transitions 0/185 dead transitions. [2022-07-22 21:49:02,093 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 185 transitions, 591 flow [2022-07-22 21:49:02,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:49:02,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:49:02,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1061 transitions. [2022-07-22 21:49:02,096 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7772893772893773 [2022-07-22 21:49:02,096 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1061 transitions. [2022-07-22 21:49:02,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1061 transitions. [2022-07-22 21:49:02,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:02,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1061 transitions. [2022-07-22 21:49:02,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 151.57142857142858) internal successors, (1061), 7 states have internal predecessors, (1061), 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) [2022-07-22 21:49:02,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 195.0) internal successors, (1560), 8 states have internal predecessors, (1560), 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) [2022-07-22 21:49:02,103 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 195.0) internal successors, (1560), 8 states have internal predecessors, (1560), 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) [2022-07-22 21:49:02,103 INFO L186 Difference]: Start difference. First operand has 181 places, 167 transitions, 406 flow. Second operand 7 states and 1061 transitions. [2022-07-22 21:49:02,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 185 transitions, 591 flow [2022-07-22 21:49:02,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 185 transitions, 580 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-22 21:49:02,114 INFO L242 Difference]: Finished difference. Result has 184 places, 168 transitions, 423 flow [2022-07-22 21:49:02,115 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=423, PETRI_PLACES=184, PETRI_TRANSITIONS=168} [2022-07-22 21:49:02,117 INFO L279 CegarLoopForPetriNet]: 177 programPoint places, 7 predicate places. [2022-07-22 21:49:02,118 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 168 transitions, 423 flow [2022-07-22 21:49:02,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 148.42857142857142) internal successors, (1039), 7 states have internal predecessors, (1039), 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) [2022-07-22 21:49:02,118 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:02,119 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:02,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:49:02,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:02,344 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:49:02,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:02,344 INFO L85 PathProgramCache]: Analyzing trace with hash 920082601, now seen corresponding path program 1 times [2022-07-22 21:49:02,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:02,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222468139] [2022-07-22 21:49:02,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:02,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:49:02,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:02,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222468139] [2022-07-22 21:49:02,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222468139] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:02,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581341042] [2022-07-22 21:49:02,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:02,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:02,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:49:02,648 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) [2022-07-22 21:49:02,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:49:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:02,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-22 21:49:02,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:49:03,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 21:49:03,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:49:03,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:49:03,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:49:03,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-22 21:49:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:49:03,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:49:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:49:04,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581341042] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:04,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:49:04,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9, 21] total 31 [2022-07-22 21:49:04,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389209405] [2022-07-22 21:49:04,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:49:04,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:49:04,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:04,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:49:04,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-07-22 21:49:04,064 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 195 [2022-07-22 21:49:04,065 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 168 transitions, 423 flow. Second operand has 10 states, 10 states have (on average 126.1) internal successors, (1261), 10 states have internal predecessors, (1261), 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) [2022-07-22 21:49:04,065 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:04,065 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 195 [2022-07-22 21:49:04,065 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:12,881 INFO L129 PetriNetUnfolder]: 45433/78393 cut-off events. [2022-07-22 21:49:12,881 INFO L130 PetriNetUnfolder]: For 29387/29387 co-relation queries the response was YES. [2022-07-22 21:49:13,366 INFO L84 FinitePrefix]: Finished finitePrefix Result has 164901 conditions, 78393 events. 45433/78393 cut-off events. For 29387/29387 co-relation queries the response was YES. Maximal size of possible extension queue 3097. Compared 748297 event pairs, 8635 based on Foata normal form. 2/76772 useless extension candidates. Maximal degree in co-relation 164888. Up to 15885 conditions per place. [2022-07-22 21:49:13,797 INFO L132 encePairwiseOnDemand]: 179/195 looper letters, 242 selfloop transitions, 37 changer transitions 27/411 dead transitions. [2022-07-22 21:49:13,797 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 411 transitions, 1757 flow [2022-07-22 21:49:13,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 21:49:13,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-22 21:49:13,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2092 transitions. [2022-07-22 21:49:13,815 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7152136752136752 [2022-07-22 21:49:13,815 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2092 transitions. [2022-07-22 21:49:13,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2092 transitions. [2022-07-22 21:49:13,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:13,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2092 transitions. [2022-07-22 21:49:13,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 139.46666666666667) internal successors, (2092), 15 states have internal predecessors, (2092), 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) [2022-07-22 21:49:13,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 195.0) internal successors, (3120), 16 states have internal predecessors, (3120), 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) [2022-07-22 21:49:13,825 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 195.0) internal successors, (3120), 16 states have internal predecessors, (3120), 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) [2022-07-22 21:49:13,825 INFO L186 Difference]: Start difference. First operand has 184 places, 168 transitions, 423 flow. Second operand 15 states and 2092 transitions. [2022-07-22 21:49:13,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 411 transitions, 1757 flow [2022-07-22 21:49:14,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 411 transitions, 1747 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-22 21:49:14,232 INFO L242 Difference]: Finished difference. Result has 207 places, 208 transitions, 713 flow [2022-07-22 21:49:14,232 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=713, PETRI_PLACES=207, PETRI_TRANSITIONS=208} [2022-07-22 21:49:14,233 INFO L279 CegarLoopForPetriNet]: 177 programPoint places, 30 predicate places. [2022-07-22 21:49:14,233 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 208 transitions, 713 flow [2022-07-22 21:49:14,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 126.1) internal successors, (1261), 10 states have internal predecessors, (1261), 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) [2022-07-22 21:49:14,234 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:14,234 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:14,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:49:14,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:14,448 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:49:14,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:14,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1803577397, now seen corresponding path program 2 times [2022-07-22 21:49:14,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:14,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917600043] [2022-07-22 21:49:14,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:14,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:49:14,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:14,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917600043] [2022-07-22 21:49:14,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917600043] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:14,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959703907] [2022-07-22 21:49:14,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:49:14,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:14,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:49:14,689 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) [2022-07-22 21:49:14,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:49:14,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:49:14,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:49:14,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 21:49:14,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:49:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:49:14,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:49:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:49:15,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959703907] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:49:15,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:49:15,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-07-22 21:49:15,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824665963] [2022-07-22 21:49:15,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:49:15,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:49:15,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:15,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:49:15,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-22 21:49:15,199 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 195 [2022-07-22 21:49:15,200 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 208 transitions, 713 flow. Second operand has 9 states, 9 states have (on average 153.66666666666666) internal successors, (1383), 9 states have internal predecessors, (1383), 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) [2022-07-22 21:49:15,201 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:15,201 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 195 [2022-07-22 21:49:15,201 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:17,279 INFO L129 PetriNetUnfolder]: 5748/14645 cut-off events. [2022-07-22 21:49:17,279 INFO L130 PetriNetUnfolder]: For 22735/25272 co-relation queries the response was YES. [2022-07-22 21:49:17,364 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39130 conditions, 14645 events. 5748/14645 cut-off events. For 22735/25272 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 149776 event pairs, 966 based on Foata normal form. 192/14069 useless extension candidates. Maximal degree in co-relation 39104. Up to 4517 conditions per place. [2022-07-22 21:49:17,426 INFO L132 encePairwiseOnDemand]: 189/195 looper letters, 104 selfloop transitions, 6 changer transitions 5/268 dead transitions. [2022-07-22 21:49:17,426 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 268 transitions, 1250 flow [2022-07-22 21:49:17,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:49:17,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:49:17,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1080 transitions. [2022-07-22 21:49:17,429 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7912087912087912 [2022-07-22 21:49:17,429 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1080 transitions. [2022-07-22 21:49:17,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1080 transitions. [2022-07-22 21:49:17,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:17,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1080 transitions. [2022-07-22 21:49:17,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 154.28571428571428) internal successors, (1080), 7 states have internal predecessors, (1080), 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) [2022-07-22 21:49:17,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 195.0) internal successors, (1560), 8 states have internal predecessors, (1560), 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) [2022-07-22 21:49:17,434 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 195.0) internal successors, (1560), 8 states have internal predecessors, (1560), 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) [2022-07-22 21:49:17,434 INFO L186 Difference]: Start difference. First operand has 207 places, 208 transitions, 713 flow. Second operand 7 states and 1080 transitions. [2022-07-22 21:49:17,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 268 transitions, 1250 flow [2022-07-22 21:49:17,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 268 transitions, 1238 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-07-22 21:49:17,511 INFO L242 Difference]: Finished difference. Result has 209 places, 212 transitions, 757 flow [2022-07-22 21:49:17,512 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=757, PETRI_PLACES=209, PETRI_TRANSITIONS=212} [2022-07-22 21:49:17,513 INFO L279 CegarLoopForPetriNet]: 177 programPoint places, 32 predicate places. [2022-07-22 21:49:17,513 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 212 transitions, 757 flow [2022-07-22 21:49:17,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 153.66666666666666) internal successors, (1383), 9 states have internal predecessors, (1383), 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) [2022-07-22 21:49:17,514 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:17,514 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:17,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-22 21:49:17,717 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 [2022-07-22 21:49:17,718 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-22 21:49:17,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:17,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1409737673, now seen corresponding path program 3 times [2022-07-22 21:49:17,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:17,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453713003] [2022-07-22 21:49:17,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:17,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:49:18,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:18,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453713003] [2022-07-22 21:49:18,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453713003] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:18,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534080445] [2022-07-22 21:49:18,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:49:18,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:18,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:49:18,029 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) [2022-07-22 21:49:18,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:49:18,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 21:49:18,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:49:18,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-22 21:49:18,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:49:18,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 21:49:18,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-22 21:49:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:49:18,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:49:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:49:19,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534080445] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:49:19,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:49:19,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 10] total 31 [2022-07-22 21:49:19,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077427555] [2022-07-22 21:49:19,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:49:19,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-22 21:49:19,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:19,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-22 21:49:19,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2022-07-22 21:49:19,043 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 195 [2022-07-22 21:49:19,046 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 212 transitions, 757 flow. Second operand has 31 states, 31 states have (on average 104.19354838709677) internal successors, (3230), 31 states have internal predecessors, (3230), 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) [2022-07-22 21:49:19,046 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:19,046 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 195 [2022-07-22 21:49:19,046 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand