./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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-channel-sum.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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:45:30,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:45:30,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:45:30,711 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:45:30,712 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:45:30,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:45:30,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:45:30,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:45:30,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:45:30,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:45:30,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:45:30,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:45:30,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:45:30,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:45:30,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:45:30,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:45:30,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:45:30,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:45:30,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:45:30,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:45:30,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:45:30,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:45:30,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:45:30,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:45:30,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:45:30,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:45:30,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:45:30,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:45:30,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:45:30,746 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:45:30,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:45:30,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:45:30,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:45:30,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:45:30,750 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:45:30,750 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:45:30,750 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:45:30,751 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:45:30,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:45:30,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:45:30,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:45:30,753 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:45:30,779 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:45:30,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:45:30,779 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:45:30,779 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:45:30,780 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:45:30,780 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:45:30,781 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:45:30,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:45:30,781 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:45:30,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:45:30,782 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:45:30,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:45:30,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:45:30,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:45:30,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:45:30,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:45:30,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:45:30,783 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:45:30,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:45:30,783 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:45:30,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:45:30,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:45:30,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:45:30,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:45:30,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:45:30,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:45:30,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:45:30,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:45:30,784 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:45:30,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:45:30,785 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:45:30,785 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:45:30,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:45:30,785 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:45:30,785 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c [2021-12-22 13:45:30,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:45:31,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:45:31,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:45:31,007 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:45:31,008 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:45:31,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2021-12-22 13:45:31,082 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/253b149e1/c24a5ff6e10b41de8e368d757d3a03c5/FLAG26a44d4bb [2021-12-22 13:45:31,451 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:45:31,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2021-12-22 13:45:31,456 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/253b149e1/c24a5ff6e10b41de8e368d757d3a03c5/FLAG26a44d4bb [2021-12-22 13:45:31,464 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/253b149e1/c24a5ff6e10b41de8e368d757d3a03c5 [2021-12-22 13:45:31,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:45:31,466 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:45:31,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:45:31,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:45:31,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:45:31,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:45:31" (1/1) ... [2021-12-22 13:45:31,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4da37177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:45:31, skipping insertion in model container [2021-12-22 13:45:31,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:45:31" (1/1) ... [2021-12-22 13:45:31,474 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:45:31,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:45:31,650 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-channel-sum.wvr.c[2947,2960] [2021-12-22 13:45:31,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:45:31,666 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:45:31,694 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-channel-sum.wvr.c[2947,2960] [2021-12-22 13:45:31,701 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:45:31,710 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:45:31,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:45:31 WrapperNode [2021-12-22 13:45:31,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:45:31,713 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:45:31,713 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:45:31,713 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:45:31,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:45:31" (1/1) ... [2021-12-22 13:45:31,729 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:45:31" (1/1) ... [2021-12-22 13:45:31,752 INFO L137 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 151 [2021-12-22 13:45:31,752 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:45:31,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:45:31,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:45:31,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:45:31,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:45:31" (1/1) ... [2021-12-22 13:45:31,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:45:31" (1/1) ... [2021-12-22 13:45:31,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:45:31" (1/1) ... [2021-12-22 13:45:31,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:45:31" (1/1) ... [2021-12-22 13:45:31,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:45:31" (1/1) ... [2021-12-22 13:45:31,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:45:31" (1/1) ... [2021-12-22 13:45:31,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:45:31" (1/1) ... [2021-12-22 13:45:31,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:45:31,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:45:31,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:45:31,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:45:31,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:45:31" (1/1) ... [2021-12-22 13:45:31,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:45:31,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:45:31,844 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) [2021-12-22 13:45:31,892 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 [2021-12-22 13:45:31,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:45:31,910 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-22 13:45:31,910 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-22 13:45:31,910 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-22 13:45:31,910 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-22 13:45:31,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:45:31,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:45:31,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:45:31,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-22 13:45:31,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-22 13:45:31,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 13:45:31,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:45:31,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:45:31,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:45:31,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:45:31,912 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-22 13:45:31,992 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:45:31,993 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:45:32,249 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:45:32,319 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:45:32,319 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-22 13:45:32,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:45:32 BoogieIcfgContainer [2021-12-22 13:45:32,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:45:32,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:45:32,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:45:32,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:45:32,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:45:31" (1/3) ... [2021-12-22 13:45:32,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@517537c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:45:32, skipping insertion in model container [2021-12-22 13:45:32,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:45:31" (2/3) ... [2021-12-22 13:45:32,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@517537c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:45:32, skipping insertion in model container [2021-12-22 13:45:32,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:45:32" (3/3) ... [2021-12-22 13:45:32,329 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2021-12-22 13:45:32,334 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:45:32,337 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:45:32,338 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:45:32,338 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:45:32,384 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,385 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,385 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,385 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,385 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,386 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,386 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,386 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,386 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,386 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,386 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,387 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,387 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,387 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,387 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,387 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,388 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,388 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,390 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,390 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,390 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,390 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,390 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,391 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,391 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,391 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,391 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,391 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,392 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,392 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,392 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,393 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,393 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,394 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,409 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,410 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,410 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,410 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,411 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,411 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,412 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,413 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,413 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,413 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,413 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,414 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,414 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,414 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,414 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,414 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,414 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,415 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,415 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,415 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,416 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,416 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,416 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,417 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,418 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,418 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,418 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,419 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,419 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,419 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,419 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,419 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,420 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,420 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,420 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,420 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,421 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,421 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,422 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,429 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,429 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,430 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,430 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,430 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,433 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,433 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,434 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,434 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,435 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,435 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,436 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,436 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,437 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,437 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,437 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,438 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,438 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,438 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,438 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:45:32,441 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-22 13:45:32,480 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:45:32,486 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 13:45:32,486 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-22 13:45:32,499 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 138 places, 142 transitions, 300 flow [2021-12-22 13:45:32,557 INFO L129 PetriNetUnfolder]: 11/140 cut-off events. [2021-12-22 13:45:32,560 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:45:32,562 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 140 events. 11/140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 127 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 99. Up to 2 conditions per place. [2021-12-22 13:45:32,563 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 142 transitions, 300 flow [2021-12-22 13:45:32,567 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 131 transitions, 274 flow [2021-12-22 13:45:32,603 INFO L129 PetriNetUnfolder]: 11/130 cut-off events. [2021-12-22 13:45:32,607 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:45:32,607 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:45:32,608 INFO L254 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] [2021-12-22 13:45:32,608 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:45:32,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:45:32,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1559977782, now seen corresponding path program 1 times [2021-12-22 13:45:32,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:45:32,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686017411] [2021-12-22 13:45:32,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:45:32,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:45:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:45:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:45:32,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:45:32,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686017411] [2021-12-22 13:45:32,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686017411] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:45:32,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:45:32,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:45:32,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460297548] [2021-12-22 13:45:32,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:45:32,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 13:45:32,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:45:32,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 13:45:32,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:45:32,820 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 142 [2021-12-22 13:45:32,823 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 131 transitions, 274 flow. Second operand has 2 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 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) [2021-12-22 13:45:32,823 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:45:32,823 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 142 [2021-12-22 13:45:32,824 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:45:32,880 INFO L129 PetriNetUnfolder]: 11/144 cut-off events. [2021-12-22 13:45:32,881 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2021-12-22 13:45:32,882 INFO L84 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 144 events. 11/144 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 201 event pairs, 4 based on Foata normal form. 18/152 useless extension candidates. Maximal degree in co-relation 95. Up to 21 conditions per place. [2021-12-22 13:45:32,884 INFO L132 encePairwiseOnDemand]: 135/142 looper letters, 9 selfloop transitions, 0 changer transitions 3/124 dead transitions. [2021-12-22 13:45:32,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 124 transitions, 278 flow [2021-12-22 13:45:32,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 13:45:32,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-22 13:45:32,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 266 transitions. [2021-12-22 13:45:32,897 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9366197183098591 [2021-12-22 13:45:32,897 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 266 transitions. [2021-12-22 13:45:32,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 266 transitions. [2021-12-22 13:45:32,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:45:32,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 266 transitions. [2021-12-22 13:45:32,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 133.0) internal successors, (266), 2 states have internal predecessors, (266), 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) [2021-12-22 13:45:32,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 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) [2021-12-22 13:45:32,915 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 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) [2021-12-22 13:45:32,916 INFO L186 Difference]: Start difference. First operand has 127 places, 131 transitions, 274 flow. Second operand 2 states and 266 transitions. [2021-12-22 13:45:32,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 124 transitions, 278 flow [2021-12-22 13:45:32,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 124 transitions, 270 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-22 13:45:32,924 INFO L242 Difference]: Finished difference. Result has 124 places, 121 transitions, 246 flow [2021-12-22 13:45:32,925 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=246, PETRI_PLACES=124, PETRI_TRANSITIONS=121} [2021-12-22 13:45:32,929 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, -3 predicate places. [2021-12-22 13:45:32,930 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 121 transitions, 246 flow [2021-12-22 13:45:32,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 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) [2021-12-22 13:45:32,930 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:45:32,930 INFO L254 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] [2021-12-22 13:45:32,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:45:32,931 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:45:32,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:45:32,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1317567152, now seen corresponding path program 1 times [2021-12-22 13:45:32,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:45:32,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708030897] [2021-12-22 13:45:32,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:45:32,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:45:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:45:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:45:33,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:45:33,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708030897] [2021-12-22 13:45:33,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708030897] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:45:33,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:45:33,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:45:33,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362632219] [2021-12-22 13:45:33,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:45:33,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:45:33,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:45:33,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:45:33,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:45:33,089 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 142 [2021-12-22 13:45:33,089 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 121 transitions, 246 flow. Second operand has 5 states, 5 states have (on average 111.4) internal successors, (557), 5 states have internal predecessors, (557), 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) [2021-12-22 13:45:33,089 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:45:33,090 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 142 [2021-12-22 13:45:33,090 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:45:33,172 INFO L129 PetriNetUnfolder]: 27/291 cut-off events. [2021-12-22 13:45:33,172 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-12-22 13:45:33,173 INFO L84 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 291 events. 27/291 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1037 event pairs, 4 based on Foata normal form. 1/268 useless extension candidates. Maximal degree in co-relation 359. Up to 34 conditions per place. [2021-12-22 13:45:33,174 INFO L132 encePairwiseOnDemand]: 137/142 looper letters, 29 selfloop transitions, 2 changer transitions 4/133 dead transitions. [2021-12-22 13:45:33,174 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 133 transitions, 343 flow [2021-12-22 13:45:33,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:45:33,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-22 13:45:33,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 576 transitions. [2021-12-22 13:45:33,177 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8112676056338028 [2021-12-22 13:45:33,177 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 576 transitions. [2021-12-22 13:45:33,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 576 transitions. [2021-12-22 13:45:33,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:45:33,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 576 transitions. [2021-12-22 13:45:33,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 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) [2021-12-22 13:45:33,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 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) [2021-12-22 13:45:33,181 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 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) [2021-12-22 13:45:33,181 INFO L186 Difference]: Start difference. First operand has 124 places, 121 transitions, 246 flow. Second operand 5 states and 576 transitions. [2021-12-22 13:45:33,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 133 transitions, 343 flow [2021-12-22 13:45:33,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 133 transitions, 343 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:45:33,184 INFO L242 Difference]: Finished difference. Result has 128 places, 122 transitions, 262 flow [2021-12-22 13:45:33,184 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=128, PETRI_TRANSITIONS=122} [2021-12-22 13:45:33,184 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 1 predicate places. [2021-12-22 13:45:33,185 INFO L470 AbstractCegarLoop]: Abstraction has has 128 places, 122 transitions, 262 flow [2021-12-22 13:45:33,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.4) internal successors, (557), 5 states have internal predecessors, (557), 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) [2021-12-22 13:45:33,185 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:45:33,185 INFO L254 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] [2021-12-22 13:45:33,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:45:33,186 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:45:33,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:45:33,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1193186558, now seen corresponding path program 1 times [2021-12-22 13:45:33,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:45:33,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275189949] [2021-12-22 13:45:33,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:45:33,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:45:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:45:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:45:33,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:45:33,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275189949] [2021-12-22 13:45:33,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275189949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:45:33,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:45:33,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:45:33,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460771565] [2021-12-22 13:45:33,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:45:33,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:45:33,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:45:33,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:45:33,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:45:33,320 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2021-12-22 13:45:33,321 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 122 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:45:33,321 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:45:33,321 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2021-12-22 13:45:33,321 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:45:33,441 INFO L129 PetriNetUnfolder]: 105/445 cut-off events. [2021-12-22 13:45:33,441 INFO L130 PetriNetUnfolder]: For 16/17 co-relation queries the response was YES. [2021-12-22 13:45:33,442 INFO L84 FinitePrefix]: Finished finitePrefix Result has 666 conditions, 445 events. 105/445 cut-off events. For 16/17 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1678 event pairs, 46 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 659. Up to 163 conditions per place. [2021-12-22 13:45:33,456 INFO L132 encePairwiseOnDemand]: 137/142 looper letters, 27 selfloop transitions, 6 changer transitions 3/137 dead transitions. [2021-12-22 13:45:33,456 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 137 transitions, 367 flow [2021-12-22 13:45:33,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 13:45:33,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-22 13:45:33,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 489 transitions. [2021-12-22 13:45:33,458 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8609154929577465 [2021-12-22 13:45:33,458 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 489 transitions. [2021-12-22 13:45:33,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 489 transitions. [2021-12-22 13:45:33,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:45:33,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 489 transitions. [2021-12-22 13:45:33,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.25) internal successors, (489), 4 states have internal predecessors, (489), 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) [2021-12-22 13:45:33,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 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) [2021-12-22 13:45:33,461 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 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) [2021-12-22 13:45:33,461 INFO L186 Difference]: Start difference. First operand has 128 places, 122 transitions, 262 flow. Second operand 4 states and 489 transitions. [2021-12-22 13:45:33,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 137 transitions, 367 flow [2021-12-22 13:45:33,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 137 transitions, 361 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-22 13:45:33,464 INFO L242 Difference]: Finished difference. Result has 128 places, 127 transitions, 293 flow [2021-12-22 13:45:33,465 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=293, PETRI_PLACES=128, PETRI_TRANSITIONS=127} [2021-12-22 13:45:33,465 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 1 predicate places. [2021-12-22 13:45:33,466 INFO L470 AbstractCegarLoop]: Abstraction has has 128 places, 127 transitions, 293 flow [2021-12-22 13:45:33,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:45:33,466 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:45:33,466 INFO L254 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] [2021-12-22 13:45:33,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:45:33,467 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:45:33,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:45:33,467 INFO L85 PathProgramCache]: Analyzing trace with hash -152225810, now seen corresponding path program 1 times [2021-12-22 13:45:33,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:45:33,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746555388] [2021-12-22 13:45:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:45:33,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:45:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:45:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:45:33,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:45:33,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746555388] [2021-12-22 13:45:33,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746555388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:45:33,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:45:33,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:45:33,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917437814] [2021-12-22 13:45:33,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:45:33,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:45:33,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:45:33,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:45:33,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:45:33,538 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 142 [2021-12-22 13:45:33,538 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 127 transitions, 293 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 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) [2021-12-22 13:45:33,539 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:45:33,539 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 142 [2021-12-22 13:45:33,539 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:45:33,574 INFO L129 PetriNetUnfolder]: 30/232 cut-off events. [2021-12-22 13:45:33,575 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2021-12-22 13:45:33,575 INFO L84 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 232 events. 30/232 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 703 event pairs, 13 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 331. Up to 56 conditions per place. [2021-12-22 13:45:33,577 INFO L132 encePairwiseOnDemand]: 139/142 looper letters, 18 selfloop transitions, 2 changer transitions 1/131 dead transitions. [2021-12-22 13:45:33,577 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 131 transitions, 339 flow [2021-12-22 13:45:33,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:45:33,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:45:33,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 384 transitions. [2021-12-22 13:45:33,578 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9014084507042254 [2021-12-22 13:45:33,578 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 384 transitions. [2021-12-22 13:45:33,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 384 transitions. [2021-12-22 13:45:33,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:45:33,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 384 transitions. [2021-12-22 13:45:33,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 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) [2021-12-22 13:45:33,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 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) [2021-12-22 13:45:33,581 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 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) [2021-12-22 13:45:33,581 INFO L186 Difference]: Start difference. First operand has 128 places, 127 transitions, 293 flow. Second operand 3 states and 384 transitions. [2021-12-22 13:45:33,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 131 transitions, 339 flow [2021-12-22 13:45:33,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 131 transitions, 337 flow, removed 1 selfloop flow, removed 0 redundant places. [2021-12-22 13:45:33,584 INFO L242 Difference]: Finished difference. Result has 131 places, 126 transitions, 293 flow [2021-12-22 13:45:33,585 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=131, PETRI_TRANSITIONS=126} [2021-12-22 13:45:33,586 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 4 predicate places. [2021-12-22 13:45:33,586 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 126 transitions, 293 flow [2021-12-22 13:45:33,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 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) [2021-12-22 13:45:33,587 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:45:33,587 INFO L254 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] [2021-12-22 13:45:33,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:45:33,587 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:45:33,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:45:33,588 INFO L85 PathProgramCache]: Analyzing trace with hash -873764727, now seen corresponding path program 1 times [2021-12-22 13:45:33,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:45:33,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630540453] [2021-12-22 13:45:33,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:45:33,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:45:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:45:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:45:33,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:45:33,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630540453] [2021-12-22 13:45:33,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630540453] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:45:33,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:45:33,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:45:33,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913876114] [2021-12-22 13:45:33,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:45:33,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:45:33,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:45:33,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:45:33,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:45:33,742 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2021-12-22 13:45:33,742 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 126 transitions, 293 flow. Second operand has 5 states, 5 states have (on average 116.8) internal successors, (584), 5 states have internal predecessors, (584), 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) [2021-12-22 13:45:33,743 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:45:33,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2021-12-22 13:45:33,744 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:45:33,830 INFO L129 PetriNetUnfolder]: 122/513 cut-off events. [2021-12-22 13:45:33,830 INFO L130 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2021-12-22 13:45:33,831 INFO L84 FinitePrefix]: Finished finitePrefix Result has 834 conditions, 513 events. 122/513 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2140 event pairs, 48 based on Foata normal form. 5/490 useless extension candidates. Maximal degree in co-relation 825. Up to 142 conditions per place. [2021-12-22 13:45:33,835 INFO L132 encePairwiseOnDemand]: 137/142 looper letters, 26 selfloop transitions, 3 changer transitions 9/140 dead transitions. [2021-12-22 13:45:33,835 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 140 transitions, 402 flow [2021-12-22 13:45:33,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:45:33,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-22 13:45:33,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 604 transitions. [2021-12-22 13:45:33,837 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8507042253521127 [2021-12-22 13:45:33,837 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 604 transitions. [2021-12-22 13:45:33,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 604 transitions. [2021-12-22 13:45:33,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:45:33,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 604 transitions. [2021-12-22 13:45:33,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.8) internal successors, (604), 5 states have internal predecessors, (604), 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) [2021-12-22 13:45:33,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 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) [2021-12-22 13:45:33,840 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 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) [2021-12-22 13:45:33,840 INFO L186 Difference]: Start difference. First operand has 131 places, 126 transitions, 293 flow. Second operand 5 states and 604 transitions. [2021-12-22 13:45:33,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 140 transitions, 402 flow [2021-12-22 13:45:33,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 140 transitions, 400 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:45:33,845 INFO L242 Difference]: Finished difference. Result has 135 places, 124 transitions, 289 flow [2021-12-22 13:45:33,845 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=289, PETRI_PLACES=135, PETRI_TRANSITIONS=124} [2021-12-22 13:45:33,847 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 8 predicate places. [2021-12-22 13:45:33,847 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 124 transitions, 289 flow [2021-12-22 13:45:33,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.8) internal successors, (584), 5 states have internal predecessors, (584), 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) [2021-12-22 13:45:33,848 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:45:33,849 INFO L254 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] [2021-12-22 13:45:33,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:45:33,849 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:45:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:45:33,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1497190495, now seen corresponding path program 2 times [2021-12-22 13:45:33,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:45:33,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122587842] [2021-12-22 13:45:33,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:45:33,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:45:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:45:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:45:33,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:45:33,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122587842] [2021-12-22 13:45:33,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122587842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:45:33,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:45:33,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:45:33,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184829150] [2021-12-22 13:45:33,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:45:33,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:45:33,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:45:33,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:45:33,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:45:34,000 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 142 [2021-12-22 13:45:34,001 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 124 transitions, 289 flow. Second operand has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 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) [2021-12-22 13:45:34,001 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:45:34,001 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 142 [2021-12-22 13:45:34,002 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:45:34,323 INFO L129 PetriNetUnfolder]: 169/645 cut-off events. [2021-12-22 13:45:34,323 INFO L130 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2021-12-22 13:45:34,325 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1106 conditions, 645 events. 169/645 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2855 event pairs, 40 based on Foata normal form. 0/614 useless extension candidates. Maximal degree in co-relation 1096. Up to 117 conditions per place. [2021-12-22 13:45:34,327 INFO L132 encePairwiseOnDemand]: 130/142 looper letters, 47 selfloop transitions, 6 changer transitions 41/180 dead transitions. [2021-12-22 13:45:34,327 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 180 transitions, 614 flow [2021-12-22 13:45:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:45:34,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-22 13:45:34,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1257 transitions. [2021-12-22 13:45:34,331 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7376760563380281 [2021-12-22 13:45:34,331 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1257 transitions. [2021-12-22 13:45:34,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1257 transitions. [2021-12-22 13:45:34,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:45:34,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1257 transitions. [2021-12-22 13:45:34,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 104.75) internal successors, (1257), 12 states have internal predecessors, (1257), 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) [2021-12-22 13:45:34,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 142.0) internal successors, (1846), 13 states have internal predecessors, (1846), 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) [2021-12-22 13:45:34,338 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 142.0) internal successors, (1846), 13 states have internal predecessors, (1846), 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) [2021-12-22 13:45:34,338 INFO L186 Difference]: Start difference. First operand has 135 places, 124 transitions, 289 flow. Second operand 12 states and 1257 transitions. [2021-12-22 13:45:34,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 180 transitions, 614 flow [2021-12-22 13:45:34,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 180 transitions, 602 flow, removed 2 selfloop flow, removed 4 redundant places. [2021-12-22 13:45:34,343 INFO L242 Difference]: Finished difference. Result has 146 places, 125 transitions, 313 flow [2021-12-22 13:45:34,343 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=313, PETRI_PLACES=146, PETRI_TRANSITIONS=125} [2021-12-22 13:45:34,345 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 19 predicate places. [2021-12-22 13:45:34,345 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 125 transitions, 313 flow [2021-12-22 13:45:34,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 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) [2021-12-22 13:45:34,346 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:45:34,346 INFO L254 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] [2021-12-22 13:45:34,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:45:34,347 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:45:34,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:45:34,349 INFO L85 PathProgramCache]: Analyzing trace with hash 756272725, now seen corresponding path program 1 times [2021-12-22 13:45:34,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:45:34,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540961105] [2021-12-22 13:45:34,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:45:34,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:45:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:45:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:45:34,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:45:34,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540961105] [2021-12-22 13:45:34,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540961105] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:45:34,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995681728] [2021-12-22 13:45:34,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:45:34,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:45:34,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:45:34,572 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) [2021-12-22 13:45:34,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:45:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:45:34,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-22 13:45:34,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:45:35,177 INFO L387 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 15 treesize of output 11 [2021-12-22 13:45:35,465 INFO L387 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 [2021-12-22 13:45:35,537 INFO L387 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 [2021-12-22 13:45:35,796 INFO L387 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 23 treesize of output 7 [2021-12-22 13:45:35,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:45:35,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:45:37,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:45:37,318 INFO L387 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 72 [2021-12-22 13:45:37,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:45:37,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 224 [2021-12-22 13:45:37,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:45:37,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 206 [2021-12-22 13:45:37,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:45:37,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 190 treesize of output 170 [2021-12-22 13:45:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:45:38,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995681728] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:45:38,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:45:38,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 28, 25] total 52 [2021-12-22 13:45:38,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807816999] [2021-12-22 13:45:38,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:45:38,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-22 13:45:38,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:45:38,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-22 13:45:38,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=2150, Unknown=34, NotChecked=0, Total=2652 [2021-12-22 13:45:38,193 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2021-12-22 13:45:38,195 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 125 transitions, 313 flow. Second operand has 52 states, 52 states have (on average 59.26923076923077) internal successors, (3082), 52 states have internal predecessors, (3082), 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) [2021-12-22 13:45:38,195 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:45:38,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2021-12-22 13:45:38,195 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:45:40,757 INFO L129 PetriNetUnfolder]: 810/1870 cut-off events. [2021-12-22 13:45:40,771 INFO L130 PetriNetUnfolder]: For 373/373 co-relation queries the response was YES. [2021-12-22 13:45:40,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3886 conditions, 1870 events. 810/1870 cut-off events. For 373/373 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 10974 event pairs, 54 based on Foata normal form. 11/1824 useless extension candidates. Maximal degree in co-relation 3872. Up to 324 conditions per place. [2021-12-22 13:45:40,782 INFO L132 encePairwiseOnDemand]: 106/142 looper letters, 191 selfloop transitions, 81 changer transitions 8/331 dead transitions. [2021-12-22 13:45:40,782 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 331 transitions, 1431 flow [2021-12-22 13:45:40,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-22 13:45:40,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-12-22 13:45:40,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3141 transitions. [2021-12-22 13:45:40,801 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43371996685998343 [2021-12-22 13:45:40,801 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3141 transitions. [2021-12-22 13:45:40,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3141 transitions. [2021-12-22 13:45:40,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:45:40,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3141 transitions. [2021-12-22 13:45:40,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 61.588235294117645) internal successors, (3141), 51 states have internal predecessors, (3141), 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) [2021-12-22 13:45:40,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 142.0) internal successors, (7384), 52 states have internal predecessors, (7384), 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) [2021-12-22 13:45:40,831 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 142.0) internal successors, (7384), 52 states have internal predecessors, (7384), 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) [2021-12-22 13:45:40,831 INFO L186 Difference]: Start difference. First operand has 146 places, 125 transitions, 313 flow. Second operand 51 states and 3141 transitions. [2021-12-22 13:45:40,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 331 transitions, 1431 flow [2021-12-22 13:45:40,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 331 transitions, 1347 flow, removed 38 selfloop flow, removed 7 redundant places. [2021-12-22 13:45:40,850 INFO L242 Difference]: Finished difference. Result has 216 places, 197 transitions, 897 flow [2021-12-22 13:45:40,850 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=897, PETRI_PLACES=216, PETRI_TRANSITIONS=197} [2021-12-22 13:45:40,851 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 89 predicate places. [2021-12-22 13:45:40,851 INFO L470 AbstractCegarLoop]: Abstraction has has 216 places, 197 transitions, 897 flow [2021-12-22 13:45:40,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 59.26923076923077) internal successors, (3082), 52 states have internal predecessors, (3082), 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) [2021-12-22 13:45:40,852 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:45:40,852 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:45:40,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 13:45:41,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:45:41,070 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:45:41,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:45:41,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1655218113, now seen corresponding path program 2 times [2021-12-22 13:45:41,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:45:41,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386581167] [2021-12-22 13:45:41,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:45:41,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:45:41,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:45:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:45:41,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:45:41,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386581167] [2021-12-22 13:45:41,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386581167] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:45:41,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907726488] [2021-12-22 13:45:41,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:45:41,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:45:41,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:45:41,160 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) [2021-12-22 13:45:41,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:45:41,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:45:41,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:45:41,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 13:45:41,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:45:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:45:41,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:45:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:45:41,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907726488] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:45:41,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:45:41,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 9 [2021-12-22 13:45:41,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523637859] [2021-12-22 13:45:41,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:45:41,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:45:41,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:45:41,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:45:41,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:45:41,664 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 142 [2021-12-22 13:45:41,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 197 transitions, 897 flow. Second operand has 9 states, 9 states have (on average 115.66666666666667) internal successors, (1041), 9 states have internal predecessors, (1041), 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) [2021-12-22 13:45:41,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:45:41,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 142 [2021-12-22 13:45:41,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:45:42,057 INFO L129 PetriNetUnfolder]: 615/1911 cut-off events. [2021-12-22 13:45:42,058 INFO L130 PetriNetUnfolder]: For 9808/9826 co-relation queries the response was YES. [2021-12-22 13:45:42,066 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6538 conditions, 1911 events. 615/1911 cut-off events. For 9808/9826 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 11673 event pairs, 39 based on Foata normal form. 12/1839 useless extension candidates. Maximal degree in co-relation 6495. Up to 394 conditions per place. [2021-12-22 13:45:42,074 INFO L132 encePairwiseOnDemand]: 133/142 looper letters, 146 selfloop transitions, 85 changer transitions 19/375 dead transitions. [2021-12-22 13:45:42,074 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 375 transitions, 2687 flow [2021-12-22 13:45:42,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:45:42,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-22 13:45:42,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1435 transitions. [2021-12-22 13:45:42,077 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8421361502347418 [2021-12-22 13:45:42,078 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1435 transitions. [2021-12-22 13:45:42,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1435 transitions. [2021-12-22 13:45:42,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:45:42,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1435 transitions. [2021-12-22 13:45:42,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 119.58333333333333) internal successors, (1435), 12 states have internal predecessors, (1435), 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) [2021-12-22 13:45:42,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 142.0) internal successors, (1846), 13 states have internal predecessors, (1846), 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) [2021-12-22 13:45:42,083 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 142.0) internal successors, (1846), 13 states have internal predecessors, (1846), 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) [2021-12-22 13:45:42,083 INFO L186 Difference]: Start difference. First operand has 216 places, 197 transitions, 897 flow. Second operand 12 states and 1435 transitions. [2021-12-22 13:45:42,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 375 transitions, 2687 flow [2021-12-22 13:45:42,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 375 transitions, 2582 flow, removed 33 selfloop flow, removed 16 redundant places. [2021-12-22 13:45:42,099 INFO L242 Difference]: Finished difference. Result has 215 places, 285 transitions, 1785 flow [2021-12-22 13:45:42,099 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1785, PETRI_PLACES=215, PETRI_TRANSITIONS=285} [2021-12-22 13:45:42,100 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 88 predicate places. [2021-12-22 13:45:42,100 INFO L470 AbstractCegarLoop]: Abstraction has has 215 places, 285 transitions, 1785 flow [2021-12-22 13:45:42,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 115.66666666666667) internal successors, (1041), 9 states have internal predecessors, (1041), 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) [2021-12-22 13:45:42,101 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:45:42,101 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:45:42,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:45:42,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-22 13:45:42,316 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:45:42,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:45:42,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1666240596, now seen corresponding path program 3 times [2021-12-22 13:45:42,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:45:42,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663752624] [2021-12-22 13:45:42,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:45:42,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:45:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:45:42,372 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 13:45:42,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:45:42,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663752624] [2021-12-22 13:45:42,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663752624] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:45:42,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:45:42,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:45:42,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109385567] [2021-12-22 13:45:42,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:45:42,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:45:42,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:45:42,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:45:42,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:45:42,375 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 142 [2021-12-22 13:45:42,375 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 285 transitions, 1785 flow. Second operand has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 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) [2021-12-22 13:45:42,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:45:42,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 142 [2021-12-22 13:45:42,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:45:42,613 INFO L129 PetriNetUnfolder]: 363/1679 cut-off events. [2021-12-22 13:45:42,613 INFO L130 PetriNetUnfolder]: For 9000/9208 co-relation queries the response was YES. [2021-12-22 13:45:42,621 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5484 conditions, 1679 events. 363/1679 cut-off events. For 9000/9208 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 11025 event pairs, 92 based on Foata normal form. 147/1713 useless extension candidates. Maximal degree in co-relation 5437. Up to 362 conditions per place. [2021-12-22 13:45:42,627 INFO L132 encePairwiseOnDemand]: 138/142 looper letters, 116 selfloop transitions, 4 changer transitions 0/275 dead transitions. [2021-12-22 13:45:42,627 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 275 transitions, 1910 flow [2021-12-22 13:45:42,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 13:45:42,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-22 13:45:42,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 503 transitions. [2021-12-22 13:45:42,629 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8855633802816901 [2021-12-22 13:45:42,629 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 503 transitions. [2021-12-22 13:45:42,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 503 transitions. [2021-12-22 13:45:42,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:45:42,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 503 transitions. [2021-12-22 13:45:42,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 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) [2021-12-22 13:45:42,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 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) [2021-12-22 13:45:42,631 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 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) [2021-12-22 13:45:42,631 INFO L186 Difference]: Start difference. First operand has 215 places, 285 transitions, 1785 flow. Second operand 4 states and 503 transitions. [2021-12-22 13:45:42,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 275 transitions, 1910 flow [2021-12-22 13:45:42,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 275 transitions, 1818 flow, removed 43 selfloop flow, removed 2 redundant places. [2021-12-22 13:45:42,649 INFO L242 Difference]: Finished difference. Result has 218 places, 265 transitions, 1533 flow [2021-12-22 13:45:42,649 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1510, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1533, PETRI_PLACES=218, PETRI_TRANSITIONS=265} [2021-12-22 13:45:42,649 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 91 predicate places. [2021-12-22 13:45:42,650 INFO L470 AbstractCegarLoop]: Abstraction has has 218 places, 265 transitions, 1533 flow [2021-12-22 13:45:42,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 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) [2021-12-22 13:45:42,650 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:45:42,650 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:45:42,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:45:42,651 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:45:42,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:45:42,651 INFO L85 PathProgramCache]: Analyzing trace with hash 207056101, now seen corresponding path program 1 times [2021-12-22 13:45:42,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:45:42,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140120688] [2021-12-22 13:45:42,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:45:42,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:45:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:45:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 13:45:42,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:45:42,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140120688] [2021-12-22 13:45:42,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140120688] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:45:42,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663461289] [2021-12-22 13:45:42,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:45:42,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:45:42,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:45:42,756 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) [2021-12-22 13:45:42,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:45:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:45:42,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 13:45:42,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:45:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:45:43,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:45:43,996 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 13:45:43,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663461289] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:45:43,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:45:43,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 15] total 35 [2021-12-22 13:45:43,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184969853] [2021-12-22 13:45:43,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:45:43,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-22 13:45:43,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:45:43,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-22 13:45:43,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-12-22 13:45:43,999 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 142 [2021-12-22 13:45:44,002 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 265 transitions, 1533 flow. Second operand has 35 states, 35 states have (on average 98.05714285714286) internal successors, (3432), 35 states have internal predecessors, (3432), 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) [2021-12-22 13:45:44,002 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:45:44,002 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 142 [2021-12-22 13:45:44,002 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:45:44,745 INFO L129 PetriNetUnfolder]: 447/1756 cut-off events. [2021-12-22 13:45:44,746 INFO L130 PetriNetUnfolder]: For 8582/8596 co-relation queries the response was YES. [2021-12-22 13:45:44,756 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6296 conditions, 1756 events. 447/1756 cut-off events. For 8582/8596 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 10383 event pairs, 240 based on Foata normal form. 23/1702 useless extension candidates. Maximal degree in co-relation 6247. Up to 860 conditions per place. [2021-12-22 13:45:44,763 INFO L132 encePairwiseOnDemand]: 123/142 looper letters, 101 selfloop transitions, 14 changer transitions 27/236 dead transitions. [2021-12-22 13:45:44,763 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 236 transitions, 1519 flow [2021-12-22 13:45:44,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 13:45:44,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-22 13:45:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2166 transitions. [2021-12-22 13:45:44,769 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6933418693982074 [2021-12-22 13:45:44,769 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2166 transitions. [2021-12-22 13:45:44,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2166 transitions. [2021-12-22 13:45:44,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:45:44,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2166 transitions. [2021-12-22 13:45:44,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 98.45454545454545) internal successors, (2166), 22 states have internal predecessors, (2166), 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) [2021-12-22 13:45:44,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 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) [2021-12-22 13:45:44,779 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 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) [2021-12-22 13:45:44,779 INFO L186 Difference]: Start difference. First operand has 218 places, 265 transitions, 1533 flow. Second operand 22 states and 2166 transitions. [2021-12-22 13:45:44,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 236 transitions, 1519 flow [2021-12-22 13:45:44,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 236 transitions, 1468 flow, removed 25 selfloop flow, removed 3 redundant places. [2021-12-22 13:45:44,796 INFO L242 Difference]: Finished difference. Result has 233 places, 204 transitions, 1068 flow [2021-12-22 13:45:44,797 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1068, PETRI_PLACES=233, PETRI_TRANSITIONS=204} [2021-12-22 13:45:44,798 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 106 predicate places. [2021-12-22 13:45:44,798 INFO L470 AbstractCegarLoop]: Abstraction has has 233 places, 204 transitions, 1068 flow [2021-12-22 13:45:44,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 98.05714285714286) internal successors, (3432), 35 states have internal predecessors, (3432), 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) [2021-12-22 13:45:44,799 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:45:44,799 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:45:44,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 13:45:45,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:45:45,016 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:45:45,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:45:45,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1887549627, now seen corresponding path program 2 times [2021-12-22 13:45:45,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:45:45,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354157521] [2021-12-22 13:45:45,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:45:45,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:45:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:45:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:45:46,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:45:46,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354157521] [2021-12-22 13:45:46,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354157521] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:45:46,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195556470] [2021-12-22 13:45:46,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:45:46,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:45:46,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:45:46,550 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) [2021-12-22 13:45:46,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:45:46,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:45:46,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:45:46,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-22 13:45:46,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:45:47,436 INFO L387 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 15 treesize of output 11 [2021-12-22 13:45:47,827 INFO L387 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 [2021-12-22 13:45:47,913 INFO L387 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 [2021-12-22 13:45:49,126 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-22 13:45:49,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 15 [2021-12-22 13:45:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:45:49,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:45:52,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:45:52,081 INFO L387 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 125 [2021-12-22 13:45:52,110 INFO L353 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2021-12-22 13:45:52,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 808 treesize of output 758 [2021-12-22 13:45:52,142 INFO L353 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2021-12-22 13:45:52,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 706 treesize of output 602 [2021-12-22 13:45:52,177 INFO L353 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2021-12-22 13:45:52,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 550 treesize of output 524 [2021-12-22 13:45:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:45:55,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195556470] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:45:55,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:45:55,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 36] total 103 [2021-12-22 13:45:55,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576011668] [2021-12-22 13:45:55,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:45:55,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-12-22 13:45:55,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:45:55,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-12-22 13:45:55,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1203, Invalid=9253, Unknown=50, NotChecked=0, Total=10506 [2021-12-22 13:45:55,316 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 142 [2021-12-22 13:45:55,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 204 transitions, 1068 flow. Second operand has 103 states, 103 states have (on average 54.271844660194176) internal successors, (5590), 103 states have internal predecessors, (5590), 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) [2021-12-22 13:45:55,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:45:55,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 142 [2021-12-22 13:45:55,329 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:46:33,134 INFO L129 PetriNetUnfolder]: 6652/15630 cut-off events. [2021-12-22 13:46:33,135 INFO L130 PetriNetUnfolder]: For 107435/107487 co-relation queries the response was YES. [2021-12-22 13:46:33,298 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63709 conditions, 15630 events. 6652/15630 cut-off events. For 107435/107487 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 146425 event pairs, 279 based on Foata normal form. 20/15135 useless extension candidates. Maximal degree in co-relation 63657. Up to 2128 conditions per place. [2021-12-22 13:46:33,501 INFO L132 encePairwiseOnDemand]: 99/142 looper letters, 1040 selfloop transitions, 813 changer transitions 95/1999 dead transitions. [2021-12-22 13:46:33,502 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 1999 transitions, 19641 flow [2021-12-22 13:46:33,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 312 states. [2021-12-22 13:46:33,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2021-12-22 13:46:33,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 17836 transitions. [2021-12-22 13:46:33,520 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4025821596244131 [2021-12-22 13:46:33,520 INFO L72 ComplementDD]: Start complementDD. Operand 312 states and 17836 transitions. [2021-12-22 13:46:33,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 312 states and 17836 transitions. [2021-12-22 13:46:33,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:46:33,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 312 states and 17836 transitions. [2021-12-22 13:46:33,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 313 states, 312 states have (on average 57.166666666666664) internal successors, (17836), 312 states have internal predecessors, (17836), 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) [2021-12-22 13:46:33,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 313 states, 313 states have (on average 142.0) internal successors, (44446), 313 states have internal predecessors, (44446), 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) [2021-12-22 13:46:33,601 INFO L81 ComplementDD]: Finished complementDD. Result has 313 states, 313 states have (on average 142.0) internal successors, (44446), 313 states have internal predecessors, (44446), 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) [2021-12-22 13:46:33,601 INFO L186 Difference]: Start difference. First operand has 233 places, 204 transitions, 1068 flow. Second operand 312 states and 17836 transitions. [2021-12-22 13:46:33,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 1999 transitions, 19641 flow [2021-12-22 13:46:33,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 1999 transitions, 18408 flow, removed 607 selfloop flow, removed 19 redundant places. [2021-12-22 13:46:33,708 INFO L242 Difference]: Finished difference. Result has 651 places, 1149 transitions, 12938 flow [2021-12-22 13:46:33,709 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1027, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=312, PETRI_FLOW=12938, PETRI_PLACES=651, PETRI_TRANSITIONS=1149} [2021-12-22 13:46:33,709 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 524 predicate places. [2021-12-22 13:46:33,710 INFO L470 AbstractCegarLoop]: Abstraction has has 651 places, 1149 transitions, 12938 flow [2021-12-22 13:46:33,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 54.271844660194176) internal successors, (5590), 103 states have internal predecessors, (5590), 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) [2021-12-22 13:46:33,712 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:46:33,712 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:46:33,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 13:46:33,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:33,927 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:46:33,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:46:33,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1593357063, now seen corresponding path program 3 times [2021-12-22 13:46:33,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:46:33,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062114454] [2021-12-22 13:46:33,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:46:33,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:46:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:46:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:35,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:46:35,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062114454] [2021-12-22 13:46:35,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062114454] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:46:35,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035846274] [2021-12-22 13:46:35,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:46:35,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:46:35,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:46:35,266 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) [2021-12-22 13:46:35,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 13:46:35,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-22 13:46:35,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:46:35,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-22 13:46:35,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:46:36,103 INFO L387 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 15 treesize of output 11 [2021-12-22 13:46:36,564 INFO L387 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 [2021-12-22 13:46:36,643 INFO L387 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 [2021-12-22 13:46:38,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:46:38,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:46:38,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 13:46:38,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:46:38,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 22 [2021-12-22 13:46:38,612 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:46:38,612 INFO L328 TraceCheckSpWp]: Computing backward predicates...