./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test-easy1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/test-easy1.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 fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:09:04,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:09:04,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:09:04,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:09:04,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:09:04,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:09:04,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:09:04,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:09:04,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:09:04,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:09:04,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:09:04,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:09:04,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:09:04,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:09:04,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:09:04,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:09:04,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:09:04,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:09:04,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:09:04,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:09:04,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:09:04,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:09:04,796 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:09:04,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:09:04,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:09:04,800 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:09:04,800 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:09:04,801 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:09:04,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:09:04,802 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:09:04,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:09:04,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:09:04,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:09:04,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:09:04,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:09:04,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:09:04,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:09:04,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:09:04,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:09:04,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:09:04,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:09:04,810 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 03:09:04,829 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:09:04,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:09:04,830 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:09:04,830 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:09:04,831 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:09:04,831 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:09:04,831 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:09:04,832 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:09:04,832 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:09:04,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:09:04,832 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 03:09:04,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:09:04,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 03:09:04,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:09:04,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:09:04,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:09:04,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:09:04,834 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 03:09:04,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:09:04,834 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:09:04,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:09:04,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:09:04,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:09:04,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:09:04,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:09:04,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:09:04,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:09:04,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:09:04,836 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:09:04,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:09:04,836 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:09:04,836 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:09:04,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:09:04,836 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 [2021-12-28 03:09:05,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:09:05,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:09:05,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:09:05,182 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:09:05,183 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:09:05,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-easy1.wvr.c [2021-12-28 03:09:05,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba3800905/13c26f9c212c4c9da4c3075ece3013aa/FLAG2f7d5434a [2021-12-28 03:09:05,750 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:09:05,750 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-easy1.wvr.c [2021-12-28 03:09:05,758 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba3800905/13c26f9c212c4c9da4c3075ece3013aa/FLAG2f7d5434a [2021-12-28 03:09:06,131 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba3800905/13c26f9c212c4c9da4c3075ece3013aa [2021-12-28 03:09:06,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:09:06,138 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:09:06,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:09:06,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:09:06,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:09:06,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:09:06" (1/1) ... [2021-12-28 03:09:06,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78303a8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:09:06, skipping insertion in model container [2021-12-28 03:09:06,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:09:06" (1/1) ... [2021-12-28 03:09:06,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:09:06,165 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:09:06,316 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/test-easy1.wvr.c[1876,1889] [2021-12-28 03:09:06,320 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:09:06,326 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:09:06,354 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/test-easy1.wvr.c[1876,1889] [2021-12-28 03:09:06,360 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:09:06,393 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:09:06,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:09:06 WrapperNode [2021-12-28 03:09:06,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:09:06,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:09:06,394 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:09:06,394 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:09:06,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:09:06" (1/1) ... [2021-12-28 03:09:06,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:09:06" (1/1) ... [2021-12-28 03:09:06,437 INFO L137 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2021-12-28 03:09:06,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:09:06,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:09:06,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:09:06,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:09:06,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:09:06" (1/1) ... [2021-12-28 03:09:06,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:09:06" (1/1) ... [2021-12-28 03:09:06,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:09:06" (1/1) ... [2021-12-28 03:09:06,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:09:06" (1/1) ... [2021-12-28 03:09:06,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:09:06" (1/1) ... [2021-12-28 03:09:06,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:09:06" (1/1) ... [2021-12-28 03:09:06,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:09:06" (1/1) ... [2021-12-28 03:09:06,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:09:06,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:09:06,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:09:06,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:09:06,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:09:06" (1/1) ... [2021-12-28 03:09:06,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:09:06,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:09:06,517 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) [2021-12-28 03:09:06,543 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 [2021-12-28 03:09:06,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:09:06,567 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-28 03:09:06,567 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-28 03:09:06,567 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-28 03:09:06,567 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-28 03:09:06,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:09:06,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:09:06,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:09:06,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:09:06,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:09:06,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:09:06,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:09:06,570 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-28 03:09:06,658 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:09:06,660 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:09:06,841 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:09:06,852 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:09:06,854 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-28 03:09:06,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:09:06 BoogieIcfgContainer [2021-12-28 03:09:06,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:09:06,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:09:06,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:09:06,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:09:06,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:09:06" (1/3) ... [2021-12-28 03:09:06,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@725e7bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:09:06, skipping insertion in model container [2021-12-28 03:09:06,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:09:06" (2/3) ... [2021-12-28 03:09:06,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@725e7bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:09:06, skipping insertion in model container [2021-12-28 03:09:06,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:09:06" (3/3) ... [2021-12-28 03:09:06,866 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2021-12-28 03:09:06,871 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-28 03:09:06,871 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:09:06,871 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:09:06,871 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-28 03:09:06,914 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,914 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,915 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,915 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,915 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,917 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,917 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,918 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,920 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,920 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,920 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,920 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,921 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,922 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,922 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,922 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,923 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,926 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,926 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,926 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,928 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,928 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,928 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 03:09:06,932 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-28 03:09:06,981 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:09:06,991 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 [2021-12-28 03:09:06,991 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-28 03:09:07,002 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2021-12-28 03:09:07,042 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2021-12-28 03:09:07,042 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-28 03:09:07,045 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2021-12-28 03:09:07,045 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2021-12-28 03:09:07,051 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2021-12-28 03:09:07,082 INFO L129 PetriNetUnfolder]: 6/72 cut-off events. [2021-12-28 03:09:07,085 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-28 03:09:07,085 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:07,086 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] [2021-12-28 03:09:07,087 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:07,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:07,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1675015954, now seen corresponding path program 1 times [2021-12-28 03:09:07,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:07,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972677787] [2021-12-28 03:09:07,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:07,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:07,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:07,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972677787] [2021-12-28 03:09:07,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972677787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:07,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:07,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 03:09:07,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680442835] [2021-12-28 03:09:07,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:07,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 03:09:07,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:07,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 03:09:07,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 03:09:07,380 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 84 [2021-12-28 03:09:07,384 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 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) [2021-12-28 03:09:07,384 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:07,384 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 84 [2021-12-28 03:09:07,386 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:07,439 INFO L129 PetriNetUnfolder]: 2/69 cut-off events. [2021-12-28 03:09:07,439 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-28 03:09:07,440 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 69 events. 2/69 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 35 event pairs, 0 based on Foata normal form. 6/71 useless extension candidates. Maximal degree in co-relation 48. Up to 5 conditions per place. [2021-12-28 03:09:07,441 INFO L132 encePairwiseOnDemand]: 80/84 looper letters, 4 selfloop transitions, 0 changer transitions 2/69 dead transitions. [2021-12-28 03:09:07,442 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 158 flow [2021-12-28 03:09:07,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 03:09:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-28 03:09:07,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 158 transitions. [2021-12-28 03:09:07,455 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9404761904761905 [2021-12-28 03:09:07,456 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 158 transitions. [2021-12-28 03:09:07,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 158 transitions. [2021-12-28 03:09:07,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:07,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 158 transitions. [2021-12-28 03:09:07,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 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) [2021-12-28 03:09:07,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 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) [2021-12-28 03:09:07,471 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 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) [2021-12-28 03:09:07,473 INFO L186 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 2 states and 158 transitions. [2021-12-28 03:09:07,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 158 flow [2021-12-28 03:09:07,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-28 03:09:07,486 INFO L242 Difference]: Finished difference. Result has 71 places, 67 transitions, 138 flow [2021-12-28 03:09:07,488 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2021-12-28 03:09:07,495 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2021-12-28 03:09:07,495 INFO L470 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 138 flow [2021-12-28 03:09:07,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 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) [2021-12-28 03:09:07,496 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:07,497 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] [2021-12-28 03:09:07,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:09:07,497 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:07,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:07,503 INFO L85 PathProgramCache]: Analyzing trace with hash 845260518, now seen corresponding path program 1 times [2021-12-28 03:09:07,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:07,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366776345] [2021-12-28 03:09:07,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:07,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:07,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:07,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366776345] [2021-12-28 03:09:07,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366776345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:07,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:07,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 03:09:07,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863697660] [2021-12-28 03:09:07,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:07,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:09:07,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:07,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:09:07,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:09:07,759 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2021-12-28 03:09:07,760 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 138 flow. Second operand has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 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) [2021-12-28 03:09:07,760 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:07,760 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2021-12-28 03:09:07,760 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:07,939 INFO L129 PetriNetUnfolder]: 62/212 cut-off events. [2021-12-28 03:09:07,939 INFO L130 PetriNetUnfolder]: For 11/23 co-relation queries the response was YES. [2021-12-28 03:09:07,940 INFO L84 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 212 events. 62/212 cut-off events. For 11/23 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 736 event pairs, 30 based on Foata normal form. 2/178 useless extension candidates. Maximal degree in co-relation 352. Up to 85 conditions per place. [2021-12-28 03:09:07,943 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 29 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2021-12-28 03:09:07,943 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 245 flow [2021-12-28 03:09:07,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:09:07,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-28 03:09:07,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 410 transitions. [2021-12-28 03:09:07,950 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6972789115646258 [2021-12-28 03:09:07,950 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 410 transitions. [2021-12-28 03:09:07,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 410 transitions. [2021-12-28 03:09:07,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:07,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 410 transitions. [2021-12-28 03:09:07,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.57142857142857) internal successors, (410), 7 states have internal predecessors, (410), 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) [2021-12-28 03:09:07,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 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) [2021-12-28 03:09:07,956 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 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) [2021-12-28 03:09:07,956 INFO L186 Difference]: Start difference. First operand has 71 places, 67 transitions, 138 flow. Second operand 7 states and 410 transitions. [2021-12-28 03:09:07,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 245 flow [2021-12-28 03:09:07,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 81 transitions, 245 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-28 03:09:07,959 INFO L242 Difference]: Finished difference. Result has 78 places, 69 transitions, 165 flow [2021-12-28 03:09:07,959 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2021-12-28 03:09:07,960 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2021-12-28 03:09:07,960 INFO L470 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 165 flow [2021-12-28 03:09:07,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 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) [2021-12-28 03:09:07,961 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:07,961 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] [2021-12-28 03:09:07,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 03:09:07,962 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:07,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:07,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1873293087, now seen corresponding path program 1 times [2021-12-28 03:09:07,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:07,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696804690] [2021-12-28 03:09:07,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:07,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:08,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:08,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696804690] [2021-12-28 03:09:08,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696804690] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:09:08,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700962883] [2021-12-28 03:09:08,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:08,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:09:08,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:09:08,081 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) [2021-12-28 03:09:08,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 03:09:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:08,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 03:09:08,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:09:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:08,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:09:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:08,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700962883] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-28 03:09:08,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-28 03:09:08,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2021-12-28 03:09:08,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199871238] [2021-12-28 03:09:08,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:08,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:09:08,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:08,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:09:08,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-28 03:09:08,884 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2021-12-28 03:09:08,885 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 165 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2021-12-28 03:09:08,885 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:08,885 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2021-12-28 03:09:08,885 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:09,006 INFO L129 PetriNetUnfolder]: 62/253 cut-off events. [2021-12-28 03:09:09,006 INFO L130 PetriNetUnfolder]: For 25/32 co-relation queries the response was YES. [2021-12-28 03:09:09,007 INFO L84 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 253 events. 62/253 cut-off events. For 25/32 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 977 event pairs, 22 based on Foata normal form. 1/219 useless extension candidates. Maximal degree in co-relation 459. Up to 89 conditions per place. [2021-12-28 03:09:09,009 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 37 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2021-12-28 03:09:09,010 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 91 transitions, 324 flow [2021-12-28 03:09:09,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 03:09:09,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-28 03:09:09,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 365 transitions. [2021-12-28 03:09:09,012 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7242063492063492 [2021-12-28 03:09:09,012 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 365 transitions. [2021-12-28 03:09:09,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 365 transitions. [2021-12-28 03:09:09,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:09,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 365 transitions. [2021-12-28 03:09:09,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.833333333333336) internal successors, (365), 6 states have internal predecessors, (365), 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) [2021-12-28 03:09:09,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 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) [2021-12-28 03:09:09,015 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 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) [2021-12-28 03:09:09,016 INFO L186 Difference]: Start difference. First operand has 78 places, 69 transitions, 165 flow. Second operand 6 states and 365 transitions. [2021-12-28 03:09:09,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 91 transitions, 324 flow [2021-12-28 03:09:09,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 91 transitions, 305 flow, removed 6 selfloop flow, removed 5 redundant places. [2021-12-28 03:09:09,019 INFO L242 Difference]: Finished difference. Result has 79 places, 73 transitions, 210 flow [2021-12-28 03:09:09,019 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2021-12-28 03:09:09,020 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2021-12-28 03:09:09,020 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 210 flow [2021-12-28 03:09:09,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2021-12-28 03:09:09,021 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:09,021 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] [2021-12-28 03:09:09,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 03:09:09,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:09:09,235 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:09,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:09,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1876192723, now seen corresponding path program 2 times [2021-12-28 03:09:09,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:09,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447186086] [2021-12-28 03:09:09,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:09,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:09,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:09,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447186086] [2021-12-28 03:09:09,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447186086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:09,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:09,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 03:09:09,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376609484] [2021-12-28 03:09:09,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:09,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:09:09,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:09,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:09:09,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:09:09,344 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2021-12-28 03:09:09,345 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2021-12-28 03:09:09,345 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:09,346 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2021-12-28 03:09:09,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:09,439 INFO L129 PetriNetUnfolder]: 55/236 cut-off events. [2021-12-28 03:09:09,440 INFO L130 PetriNetUnfolder]: For 144/158 co-relation queries the response was YES. [2021-12-28 03:09:09,445 INFO L84 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 236 events. 55/236 cut-off events. For 144/158 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 901 event pairs, 7 based on Foata normal form. 5/235 useless extension candidates. Maximal degree in co-relation 494. Up to 94 conditions per place. [2021-12-28 03:09:09,447 INFO L132 encePairwiseOnDemand]: 75/84 looper letters, 33 selfloop transitions, 7 changer transitions 5/88 dead transitions. [2021-12-28 03:09:09,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 88 transitions, 356 flow [2021-12-28 03:09:09,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 03:09:09,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-28 03:09:09,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 360 transitions. [2021-12-28 03:09:09,450 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2021-12-28 03:09:09,450 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 360 transitions. [2021-12-28 03:09:09,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 360 transitions. [2021-12-28 03:09:09,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:09,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 360 transitions. [2021-12-28 03:09:09,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:09,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 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) [2021-12-28 03:09:09,454 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 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) [2021-12-28 03:09:09,454 INFO L186 Difference]: Start difference. First operand has 79 places, 73 transitions, 210 flow. Second operand 6 states and 360 transitions. [2021-12-28 03:09:09,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 88 transitions, 356 flow [2021-12-28 03:09:09,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 88 transitions, 352 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-28 03:09:09,461 INFO L242 Difference]: Finished difference. Result has 84 places, 75 transitions, 246 flow [2021-12-28 03:09:09,461 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=84, PETRI_TRANSITIONS=75} [2021-12-28 03:09:09,462 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 10 predicate places. [2021-12-28 03:09:09,463 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 246 flow [2021-12-28 03:09:09,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2021-12-28 03:09:09,463 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:09,464 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] [2021-12-28 03:09:09,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 03:09:09,464 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:09,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:09,465 INFO L85 PathProgramCache]: Analyzing trace with hash 849329763, now seen corresponding path program 1 times [2021-12-28 03:09:09,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:09,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890782962] [2021-12-28 03:09:09,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:09,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:09,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:09,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:09,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890782962] [2021-12-28 03:09:09,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890782962] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:09,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:09,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 03:09:09,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359508827] [2021-12-28 03:09:09,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:09,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:09:09,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:09,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:09:09,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:09:09,603 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2021-12-28 03:09:09,604 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 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) [2021-12-28 03:09:09,604 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:09,604 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2021-12-28 03:09:09,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:09,698 INFO L129 PetriNetUnfolder]: 50/227 cut-off events. [2021-12-28 03:09:09,698 INFO L130 PetriNetUnfolder]: For 199/203 co-relation queries the response was YES. [2021-12-28 03:09:09,699 INFO L84 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 227 events. 50/227 cut-off events. For 199/203 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 789 event pairs, 12 based on Foata normal form. 8/230 useless extension candidates. Maximal degree in co-relation 506. Up to 57 conditions per place. [2021-12-28 03:09:09,700 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 33 selfloop transitions, 11 changer transitions 4/91 dead transitions. [2021-12-28 03:09:09,700 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 91 transitions, 402 flow [2021-12-28 03:09:09,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:09:09,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-28 03:09:09,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 417 transitions. [2021-12-28 03:09:09,705 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7091836734693877 [2021-12-28 03:09:09,705 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 417 transitions. [2021-12-28 03:09:09,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 417 transitions. [2021-12-28 03:09:09,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:09,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 417 transitions. [2021-12-28 03:09:09,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.57142857142857) internal successors, (417), 7 states have internal predecessors, (417), 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) [2021-12-28 03:09:09,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 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) [2021-12-28 03:09:09,713 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 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) [2021-12-28 03:09:09,713 INFO L186 Difference]: Start difference. First operand has 84 places, 75 transitions, 246 flow. Second operand 7 states and 417 transitions. [2021-12-28 03:09:09,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 91 transitions, 402 flow [2021-12-28 03:09:09,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 91 transitions, 390 flow, removed 1 selfloop flow, removed 4 redundant places. [2021-12-28 03:09:09,716 INFO L242 Difference]: Finished difference. Result has 89 places, 75 transitions, 273 flow [2021-12-28 03:09:09,717 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=273, PETRI_PLACES=89, PETRI_TRANSITIONS=75} [2021-12-28 03:09:09,717 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 15 predicate places. [2021-12-28 03:09:09,717 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 75 transitions, 273 flow [2021-12-28 03:09:09,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 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) [2021-12-28 03:09:09,718 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:09,718 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] [2021-12-28 03:09:09,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 03:09:09,718 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:09,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:09,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1010787432, now seen corresponding path program 1 times [2021-12-28 03:09:09,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:09,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383972856] [2021-12-28 03:09:09,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:09,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:09,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:09,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383972856] [2021-12-28 03:09:09,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383972856] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:09:09,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215438954] [2021-12-28 03:09:09,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:09,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:09:09,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:09:09,856 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) [2021-12-28 03:09:09,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 03:09:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:09,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-28 03:09:09,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:09:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:10,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:09:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:10,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215438954] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:09:10,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:09:10,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2021-12-28 03:09:10,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137992473] [2021-12-28 03:09:10,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:09:10,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-28 03:09:10,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:10,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-28 03:09:10,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-12-28 03:09:10,618 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-28 03:09:10,619 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 75 transitions, 273 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 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) [2021-12-28 03:09:10,619 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:10,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-28 03:09:10,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:12,534 INFO L129 PetriNetUnfolder]: 201/619 cut-off events. [2021-12-28 03:09:12,535 INFO L130 PetriNetUnfolder]: For 885/885 co-relation queries the response was YES. [2021-12-28 03:09:12,537 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1726 conditions, 619 events. 201/619 cut-off events. For 885/885 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3349 event pairs, 9 based on Foata normal form. 18/632 useless extension candidates. Maximal degree in co-relation 1714. Up to 96 conditions per place. [2021-12-28 03:09:12,540 INFO L132 encePairwiseOnDemand]: 66/84 looper letters, 105 selfloop transitions, 136 changer transitions 4/286 dead transitions. [2021-12-28 03:09:12,541 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 286 transitions, 1774 flow [2021-12-28 03:09:12,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-28 03:09:12,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-12-28 03:09:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3453 transitions. [2021-12-28 03:09:12,549 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6524943310657596 [2021-12-28 03:09:12,550 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3453 transitions. [2021-12-28 03:09:12,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3453 transitions. [2021-12-28 03:09:12,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:12,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3453 transitions. [2021-12-28 03:09:12,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 54.80952380952381) internal successors, (3453), 63 states have internal predecessors, (3453), 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) [2021-12-28 03:09:12,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 84.0) internal successors, (5376), 64 states have internal predecessors, (5376), 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) [2021-12-28 03:09:12,570 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 84.0) internal successors, (5376), 64 states have internal predecessors, (5376), 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) [2021-12-28 03:09:12,570 INFO L186 Difference]: Start difference. First operand has 89 places, 75 transitions, 273 flow. Second operand 63 states and 3453 transitions. [2021-12-28 03:09:12,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 286 transitions, 1774 flow [2021-12-28 03:09:12,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 286 transitions, 1745 flow, removed 9 selfloop flow, removed 4 redundant places. [2021-12-28 03:09:12,579 INFO L242 Difference]: Finished difference. Result has 165 places, 217 transitions, 1436 flow [2021-12-28 03:09:12,580 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=1436, PETRI_PLACES=165, PETRI_TRANSITIONS=217} [2021-12-28 03:09:12,580 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 91 predicate places. [2021-12-28 03:09:12,581 INFO L470 AbstractCegarLoop]: Abstraction has has 165 places, 217 transitions, 1436 flow [2021-12-28 03:09:12,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 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) [2021-12-28 03:09:12,581 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:12,582 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] [2021-12-28 03:09:12,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 03:09:12,807 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,SelfDestructingSolverStorable5 [2021-12-28 03:09:12,808 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:12,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:12,808 INFO L85 PathProgramCache]: Analyzing trace with hash 287847382, now seen corresponding path program 2 times [2021-12-28 03:09:12,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:12,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361309079] [2021-12-28 03:09:12,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:12,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:12,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:12,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361309079] [2021-12-28 03:09:12,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361309079] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:09:12,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875192518] [2021-12-28 03:09:12,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:09:12,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:09:12,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:09:12,976 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) [2021-12-28 03:09:12,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 03:09:13,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:09:13,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:09:13,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-28 03:09:13,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:09:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:13,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:09:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:13,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875192518] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:09:13,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:09:13,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2021-12-28 03:09:13,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535799377] [2021-12-28 03:09:13,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:09:13,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-28 03:09:13,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:13,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-28 03:09:13,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-12-28 03:09:13,533 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-28 03:09:13,534 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 217 transitions, 1436 flow. Second operand has 21 states, 21 states have (on average 53.04761904761905) internal successors, (1114), 21 states have internal predecessors, (1114), 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) [2021-12-28 03:09:13,534 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:13,534 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-28 03:09:13,534 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:13,950 INFO L129 PetriNetUnfolder]: 225/686 cut-off events. [2021-12-28 03:09:13,950 INFO L130 PetriNetUnfolder]: For 3231/3231 co-relation queries the response was YES. [2021-12-28 03:09:13,954 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2790 conditions, 686 events. 225/686 cut-off events. For 3231/3231 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3957 event pairs, 18 based on Foata normal form. 1/683 useless extension candidates. Maximal degree in co-relation 2759. Up to 180 conditions per place. [2021-12-28 03:09:13,958 INFO L132 encePairwiseOnDemand]: 67/84 looper letters, 80 selfloop transitions, 170 changer transitions 15/306 dead transitions. [2021-12-28 03:09:13,958 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 306 transitions, 2719 flow [2021-12-28 03:09:13,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-28 03:09:13,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-28 03:09:13,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1093 transitions. [2021-12-28 03:09:13,963 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6505952380952381 [2021-12-28 03:09:13,964 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1093 transitions. [2021-12-28 03:09:13,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1093 transitions. [2021-12-28 03:09:13,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:13,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1093 transitions. [2021-12-28 03:09:13,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 54.65) internal successors, (1093), 20 states have internal predecessors, (1093), 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) [2021-12-28 03:09:13,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 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) [2021-12-28 03:09:13,990 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 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) [2021-12-28 03:09:13,990 INFO L186 Difference]: Start difference. First operand has 165 places, 217 transitions, 1436 flow. Second operand 20 states and 1093 transitions. [2021-12-28 03:09:13,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 306 transitions, 2719 flow [2021-12-28 03:09:14,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 306 transitions, 2517 flow, removed 88 selfloop flow, removed 7 redundant places. [2021-12-28 03:09:14,029 INFO L242 Difference]: Finished difference. Result has 182 places, 270 transitions, 2130 flow [2021-12-28 03:09:14,030 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2130, PETRI_PLACES=182, PETRI_TRANSITIONS=270} [2021-12-28 03:09:14,030 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 108 predicate places. [2021-12-28 03:09:14,031 INFO L470 AbstractCegarLoop]: Abstraction has has 182 places, 270 transitions, 2130 flow [2021-12-28 03:09:14,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.04761904761905) internal successors, (1114), 21 states have internal predecessors, (1114), 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) [2021-12-28 03:09:14,031 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:14,031 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] [2021-12-28 03:09:14,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-28 03:09:14,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:09:14,256 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:14,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:14,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1523094532, now seen corresponding path program 3 times [2021-12-28 03:09:14,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:14,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770975581] [2021-12-28 03:09:14,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:14,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:14,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:14,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770975581] [2021-12-28 03:09:14,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770975581] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:09:14,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868652855] [2021-12-28 03:09:14,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 03:09:14,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:09:14,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:09:14,366 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) [2021-12-28 03:09:14,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 03:09:14,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-28 03:09:14,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:09:14,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-28 03:09:14,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:09:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:14,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:09:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:15,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868652855] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:09:15,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:09:15,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2021-12-28 03:09:15,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75323444] [2021-12-28 03:09:15,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:09:15,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-28 03:09:15,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:15,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-28 03:09:15,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-12-28 03:09:15,117 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-28 03:09:15,119 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 270 transitions, 2130 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 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) [2021-12-28 03:09:15,119 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:15,119 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-28 03:09:15,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:16,612 INFO L129 PetriNetUnfolder]: 361/1083 cut-off events. [2021-12-28 03:09:16,612 INFO L130 PetriNetUnfolder]: For 6555/6555 co-relation queries the response was YES. [2021-12-28 03:09:16,619 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4814 conditions, 1083 events. 361/1083 cut-off events. For 6555/6555 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7333 event pairs, 3 based on Foata normal form. 26/1108 useless extension candidates. Maximal degree in co-relation 4778. Up to 167 conditions per place. [2021-12-28 03:09:16,626 INFO L132 encePairwiseOnDemand]: 66/84 looper letters, 170 selfloop transitions, 270 changer transitions 79/560 dead transitions. [2021-12-28 03:09:16,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 560 transitions, 5808 flow [2021-12-28 03:09:16,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-28 03:09:16,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-12-28 03:09:16,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2524 transitions. [2021-12-28 03:09:16,631 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6532091097308489 [2021-12-28 03:09:16,631 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2524 transitions. [2021-12-28 03:09:16,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2524 transitions. [2021-12-28 03:09:16,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:16,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2524 transitions. [2021-12-28 03:09:16,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 54.869565217391305) internal successors, (2524), 46 states have internal predecessors, (2524), 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) [2021-12-28 03:09:16,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 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) [2021-12-28 03:09:16,643 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 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) [2021-12-28 03:09:16,643 INFO L186 Difference]: Start difference. First operand has 182 places, 270 transitions, 2130 flow. Second operand 46 states and 2524 transitions. [2021-12-28 03:09:16,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 560 transitions, 5808 flow [2021-12-28 03:09:16,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 560 transitions, 5385 flow, removed 113 selfloop flow, removed 9 redundant places. [2021-12-28 03:09:16,715 INFO L242 Difference]: Finished difference. Result has 243 places, 426 transitions, 4246 flow [2021-12-28 03:09:16,716 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1955, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=4246, PETRI_PLACES=243, PETRI_TRANSITIONS=426} [2021-12-28 03:09:16,717 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 169 predicate places. [2021-12-28 03:09:16,717 INFO L470 AbstractCegarLoop]: Abstraction has has 243 places, 426 transitions, 4246 flow [2021-12-28 03:09:16,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 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) [2021-12-28 03:09:16,718 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:16,718 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] [2021-12-28 03:09:16,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 03:09:16,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:09:16,931 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:16,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:16,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1847654156, now seen corresponding path program 4 times [2021-12-28 03:09:16,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:16,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670921327] [2021-12-28 03:09:16,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:16,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:17,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:17,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670921327] [2021-12-28 03:09:17,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670921327] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:17,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:17,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-28 03:09:17,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361587019] [2021-12-28 03:09:17,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:17,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 03:09:17,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:17,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 03:09:17,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:09:17,062 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-28 03:09:17,063 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 426 transitions, 4246 flow. Second operand has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 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) [2021-12-28 03:09:17,063 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:17,064 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-28 03:09:17,064 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:17,496 INFO L129 PetriNetUnfolder]: 314/871 cut-off events. [2021-12-28 03:09:17,497 INFO L130 PetriNetUnfolder]: For 8002/8002 co-relation queries the response was YES. [2021-12-28 03:09:17,503 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4851 conditions, 871 events. 314/871 cut-off events. For 8002/8002 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4969 event pairs, 15 based on Foata normal form. 1/868 useless extension candidates. Maximal degree in co-relation 4788. Up to 279 conditions per place. [2021-12-28 03:09:17,510 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 175 selfloop transitions, 295 changer transitions 6/517 dead transitions. [2021-12-28 03:09:17,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 517 transitions, 6195 flow [2021-12-28 03:09:17,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-28 03:09:17,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-28 03:09:17,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1197 transitions. [2021-12-28 03:09:17,513 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6477272727272727 [2021-12-28 03:09:17,513 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1197 transitions. [2021-12-28 03:09:17,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1197 transitions. [2021-12-28 03:09:17,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:17,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1197 transitions. [2021-12-28 03:09:17,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 54.40909090909091) internal successors, (1197), 22 states have internal predecessors, (1197), 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) [2021-12-28 03:09:17,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 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) [2021-12-28 03:09:17,540 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 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) [2021-12-28 03:09:17,540 INFO L186 Difference]: Start difference. First operand has 243 places, 426 transitions, 4246 flow. Second operand 22 states and 1197 transitions. [2021-12-28 03:09:17,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 517 transitions, 6195 flow [2021-12-28 03:09:17,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 517 transitions, 5917 flow, removed 63 selfloop flow, removed 19 redundant places. [2021-12-28 03:09:17,612 INFO L242 Difference]: Finished difference. Result has 246 places, 500 transitions, 5637 flow [2021-12-28 03:09:17,612 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=4024, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5637, PETRI_PLACES=246, PETRI_TRANSITIONS=500} [2021-12-28 03:09:17,613 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 172 predicate places. [2021-12-28 03:09:17,614 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 500 transitions, 5637 flow [2021-12-28 03:09:17,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 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) [2021-12-28 03:09:17,614 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:17,614 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] [2021-12-28 03:09:17,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 03:09:17,615 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:17,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:17,616 INFO L85 PathProgramCache]: Analyzing trace with hash -62005542, now seen corresponding path program 5 times [2021-12-28 03:09:17,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:17,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430043263] [2021-12-28 03:09:17,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:17,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:17,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:17,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430043263] [2021-12-28 03:09:17,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430043263] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:09:17,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610535594] [2021-12-28 03:09:17,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-28 03:09:17,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:09:17,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:09:17,757 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) [2021-12-28 03:09:17,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 03:09:17,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-28 03:09:17,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:09:17,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-28 03:09:17,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:09:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:18,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:09:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:18,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610535594] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:09:18,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:09:18,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2021-12-28 03:09:18,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070288873] [2021-12-28 03:09:18,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:09:18,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-28 03:09:18,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:18,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-28 03:09:18,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-12-28 03:09:18,457 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-28 03:09:18,458 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 500 transitions, 5637 flow. Second operand has 20 states, 20 states have (on average 53.05) internal successors, (1061), 20 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:18,458 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:18,458 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-28 03:09:18,458 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:19,371 INFO L129 PetriNetUnfolder]: 567/1576 cut-off events. [2021-12-28 03:09:19,371 INFO L130 PetriNetUnfolder]: For 13284/13284 co-relation queries the response was YES. [2021-12-28 03:09:19,382 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9283 conditions, 1576 events. 567/1576 cut-off events. For 13284/13284 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11129 event pairs, 18 based on Foata normal form. 2/1574 useless extension candidates. Maximal degree in co-relation 9220. Up to 256 conditions per place. [2021-12-28 03:09:19,395 INFO L132 encePairwiseOnDemand]: 67/84 looper letters, 239 selfloop transitions, 614 changer transitions 38/932 dead transitions. [2021-12-28 03:09:19,396 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 932 transitions, 12681 flow [2021-12-28 03:09:19,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-28 03:09:19,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-28 03:09:19,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1756 transitions. [2021-12-28 03:09:19,401 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6532738095238095 [2021-12-28 03:09:19,401 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1756 transitions. [2021-12-28 03:09:19,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1756 transitions. [2021-12-28 03:09:19,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:19,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1756 transitions. [2021-12-28 03:09:19,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 54.875) internal successors, (1756), 32 states have internal predecessors, (1756), 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) [2021-12-28 03:09:19,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 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) [2021-12-28 03:09:19,410 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 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) [2021-12-28 03:09:19,410 INFO L186 Difference]: Start difference. First operand has 246 places, 500 transitions, 5637 flow. Second operand 32 states and 1756 transitions. [2021-12-28 03:09:19,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 932 transitions, 12681 flow [2021-12-28 03:09:19,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 932 transitions, 12327 flow, removed 76 selfloop flow, removed 4 redundant places. [2021-12-28 03:09:19,570 INFO L242 Difference]: Finished difference. Result has 278 places, 794 transitions, 10901 flow [2021-12-28 03:09:19,571 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=5435, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=10901, PETRI_PLACES=278, PETRI_TRANSITIONS=794} [2021-12-28 03:09:19,573 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 204 predicate places. [2021-12-28 03:09:19,574 INFO L470 AbstractCegarLoop]: Abstraction has has 278 places, 794 transitions, 10901 flow [2021-12-28 03:09:19,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.05) internal successors, (1061), 20 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 03:09:19,574 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:19,575 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] [2021-12-28 03:09:19,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 03:09:19,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-28 03:09:19,788 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:19,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:19,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1407155104, now seen corresponding path program 6 times [2021-12-28 03:09:19,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:19,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460804270] [2021-12-28 03:09:19,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:19,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:19,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:19,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:19,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460804270] [2021-12-28 03:09:19,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460804270] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:09:19,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840763714] [2021-12-28 03:09:19,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-28 03:09:19,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:09:19,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:09:19,912 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:09:19,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 03:09:19,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-28 03:09:19,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:09:19,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-28 03:09:19,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:09:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:20,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:09:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:09:20,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840763714] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:09:20,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:09:20,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2021-12-28 03:09:20,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138640391] [2021-12-28 03:09:20,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:09:20,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-28 03:09:20,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:20,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-28 03:09:20,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-12-28 03:09:20,605 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-28 03:09:20,607 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 794 transitions, 10901 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 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) [2021-12-28 03:09:20,607 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:20,607 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-28 03:09:20,607 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:22,448 INFO L129 PetriNetUnfolder]: 982/2557 cut-off events. [2021-12-28 03:09:22,448 INFO L130 PetriNetUnfolder]: For 28769/28769 co-relation queries the response was YES. [2021-12-28 03:09:22,469 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17094 conditions, 2557 events. 982/2557 cut-off events. For 28769/28769 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 19689 event pairs, 12 based on Foata normal form. 28/2582 useless extension candidates. Maximal degree in co-relation 17026. Up to 408 conditions per place. [2021-12-28 03:09:22,493 INFO L132 encePairwiseOnDemand]: 65/84 looper letters, 300 selfloop transitions, 1101 changer transitions 20/1462 dead transitions. [2021-12-28 03:09:22,493 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1462 transitions, 22972 flow [2021-12-28 03:09:22,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-28 03:09:22,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-12-28 03:09:22,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2711 transitions. [2021-12-28 03:09:22,498 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6586491739552964 [2021-12-28 03:09:22,498 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2711 transitions. [2021-12-28 03:09:22,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2711 transitions. [2021-12-28 03:09:22,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:22,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2711 transitions. [2021-12-28 03:09:22,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 55.326530612244895) internal successors, (2711), 49 states have internal predecessors, (2711), 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) [2021-12-28 03:09:22,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 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) [2021-12-28 03:09:22,510 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 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) [2021-12-28 03:09:22,510 INFO L186 Difference]: Start difference. First operand has 278 places, 794 transitions, 10901 flow. Second operand 49 states and 2711 transitions. [2021-12-28 03:09:22,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1462 transitions, 22972 flow [2021-12-28 03:09:22,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1462 transitions, 21639 flow, removed 94 selfloop flow, removed 14 redundant places. [2021-12-28 03:09:22,825 INFO L242 Difference]: Finished difference. Result has 321 places, 1303 transitions, 20930 flow [2021-12-28 03:09:22,826 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=10193, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=615, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=20930, PETRI_PLACES=321, PETRI_TRANSITIONS=1303} [2021-12-28 03:09:22,827 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 247 predicate places. [2021-12-28 03:09:22,827 INFO L470 AbstractCegarLoop]: Abstraction has has 321 places, 1303 transitions, 20930 flow [2021-12-28 03:09:22,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 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) [2021-12-28 03:09:22,828 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:22,829 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] [2021-12-28 03:09:22,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 03:09:23,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:09:23,057 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:23,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:23,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1158995784, now seen corresponding path program 7 times [2021-12-28 03:09:23,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:23,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000060197] [2021-12-28 03:09:23,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:23,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:23,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:23,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000060197] [2021-12-28 03:09:23,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000060197] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:23,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:09:23,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-28 03:09:23,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125037102] [2021-12-28 03:09:23,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:23,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 03:09:23,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:23,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 03:09:23,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:09:23,190 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-28 03:09:23,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 1303 transitions, 20930 flow. Second operand has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 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) [2021-12-28 03:09:23,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:23,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-28 03:09:23,191 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:24,440 INFO L129 PetriNetUnfolder]: 1036/2642 cut-off events. [2021-12-28 03:09:24,441 INFO L130 PetriNetUnfolder]: For 37927/37927 co-relation queries the response was YES. [2021-12-28 03:09:24,464 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20039 conditions, 2642 events. 1036/2642 cut-off events. For 37927/37927 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 20325 event pairs, 36 based on Foata normal form. 1/2632 useless extension candidates. Maximal degree in co-relation 19955. Up to 1358 conditions per place. [2021-12-28 03:09:24,489 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 930 selfloop transitions, 461 changer transitions 6/1438 dead transitions. [2021-12-28 03:09:24,489 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1438 transitions, 25804 flow [2021-12-28 03:09:24,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 03:09:24,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-28 03:09:24,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 824 transitions. [2021-12-28 03:09:24,491 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2021-12-28 03:09:24,492 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 824 transitions. [2021-12-28 03:09:24,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 824 transitions. [2021-12-28 03:09:24,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:24,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 824 transitions. [2021-12-28 03:09:24,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 54.93333333333333) internal successors, (824), 15 states have internal predecessors, (824), 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) [2021-12-28 03:09:24,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 84.0) internal successors, (1344), 16 states have internal predecessors, (1344), 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) [2021-12-28 03:09:24,495 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 84.0) internal successors, (1344), 16 states have internal predecessors, (1344), 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) [2021-12-28 03:09:24,496 INFO L186 Difference]: Start difference. First operand has 321 places, 1303 transitions, 20930 flow. Second operand 15 states and 824 transitions. [2021-12-28 03:09:24,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1438 transitions, 25804 flow [2021-12-28 03:09:24,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 1438 transitions, 25588 flow, removed 82 selfloop flow, removed 10 redundant places. [2021-12-28 03:09:24,915 INFO L242 Difference]: Finished difference. Result has 332 places, 1402 transitions, 23575 flow [2021-12-28 03:09:24,917 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=20730, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=23575, PETRI_PLACES=332, PETRI_TRANSITIONS=1402} [2021-12-28 03:09:24,917 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 258 predicate places. [2021-12-28 03:09:24,918 INFO L470 AbstractCegarLoop]: Abstraction has has 332 places, 1402 transitions, 23575 flow [2021-12-28 03:09:24,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 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) [2021-12-28 03:09:24,918 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:24,918 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] [2021-12-28 03:09:24,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 03:09:24,919 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:24,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:24,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1793899132, now seen corresponding path program 8 times [2021-12-28 03:09:24,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:24,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667580377] [2021-12-28 03:09:24,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:24,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:25,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:25,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667580377] [2021-12-28 03:09:25,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667580377] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:09:25,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361877627] [2021-12-28 03:09:25,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:09:25,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:09:25,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:09:25,054 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:09:25,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 03:09:25,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:09:25,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:09:25,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-28 03:09:25,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:09:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:25,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:09:25,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361877627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:25,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:09:25,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2021-12-28 03:09:25,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331484421] [2021-12-28 03:09:25,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:25,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 03:09:25,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:25,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 03:09:25,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-12-28 03:09:25,409 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-28 03:09:25,409 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 1402 transitions, 23575 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 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) [2021-12-28 03:09:25,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:25,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-28 03:09:25,410 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:26,837 INFO L129 PetriNetUnfolder]: 1119/2881 cut-off events. [2021-12-28 03:09:26,837 INFO L130 PetriNetUnfolder]: For 44562/44562 co-relation queries the response was YES. [2021-12-28 03:09:26,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22448 conditions, 2881 events. 1119/2881 cut-off events. For 44562/44562 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 22704 event pairs, 49 based on Foata normal form. 2/2874 useless extension candidates. Maximal degree in co-relation 22357. Up to 2190 conditions per place. [2021-12-28 03:09:26,955 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1359 selfloop transitions, 131 changer transitions 13/1544 dead transitions. [2021-12-28 03:09:26,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 1544 transitions, 28749 flow [2021-12-28 03:09:26,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-28 03:09:26,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-28 03:09:26,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1006 transitions. [2021-12-28 03:09:26,958 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6653439153439153 [2021-12-28 03:09:26,958 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1006 transitions. [2021-12-28 03:09:26,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1006 transitions. [2021-12-28 03:09:26,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:26,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1006 transitions. [2021-12-28 03:09:26,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 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) [2021-12-28 03:09:26,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 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) [2021-12-28 03:09:26,963 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 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) [2021-12-28 03:09:26,963 INFO L186 Difference]: Start difference. First operand has 332 places, 1402 transitions, 23575 flow. Second operand 18 states and 1006 transitions. [2021-12-28 03:09:26,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 1544 transitions, 28749 flow [2021-12-28 03:09:27,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1544 transitions, 28653 flow, removed 48 selfloop flow, removed 3 redundant places. [2021-12-28 03:09:27,448 INFO L242 Difference]: Finished difference. Result has 353 places, 1488 transitions, 25330 flow [2021-12-28 03:09:27,449 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=23493, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=25330, PETRI_PLACES=353, PETRI_TRANSITIONS=1488} [2021-12-28 03:09:27,450 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 279 predicate places. [2021-12-28 03:09:27,450 INFO L470 AbstractCegarLoop]: Abstraction has has 353 places, 1488 transitions, 25330 flow [2021-12-28 03:09:27,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 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) [2021-12-28 03:09:27,450 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:27,450 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] [2021-12-28 03:09:27,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 03:09:27,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:09:27,651 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:27,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:27,652 INFO L85 PathProgramCache]: Analyzing trace with hash 82329012, now seen corresponding path program 9 times [2021-12-28 03:09:27,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:27,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593847728] [2021-12-28 03:09:27,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:27,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:27,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:27,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593847728] [2021-12-28 03:09:27,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593847728] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:09:27,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69860943] [2021-12-28 03:09:27,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 03:09:27,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:09:27,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:09:27,771 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:09:27,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 03:09:27,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-28 03:09:27,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:09:27,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-28 03:09:27,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:09:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:28,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:09:28,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69860943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:09:28,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:09:28,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2021-12-28 03:09:28,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813289738] [2021-12-28 03:09:28,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:09:28,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 03:09:28,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:28,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 03:09:28,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-12-28 03:09:28,154 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-28 03:09:28,154 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 1488 transitions, 25330 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 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) [2021-12-28 03:09:28,154 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:28,154 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-28 03:09:28,154 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:29,883 INFO L129 PetriNetUnfolder]: 1321/3449 cut-off events. [2021-12-28 03:09:29,884 INFO L130 PetriNetUnfolder]: For 56686/56686 co-relation queries the response was YES. [2021-12-28 03:09:29,915 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27325 conditions, 3449 events. 1321/3449 cut-off events. For 56686/56686 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 28633 event pairs, 51 based on Foata normal form. 1/3439 useless extension candidates. Maximal degree in co-relation 27226. Up to 2392 conditions per place. [2021-12-28 03:09:29,946 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 1537 selfloop transitions, 196 changer transitions 10/1784 dead transitions. [2021-12-28 03:09:29,947 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1784 transitions, 34189 flow [2021-12-28 03:09:29,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 03:09:29,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-28 03:09:29,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 910 transitions. [2021-12-28 03:09:29,949 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2021-12-28 03:09:29,949 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 910 transitions. [2021-12-28 03:09:29,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 910 transitions. [2021-12-28 03:09:29,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:29,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 910 transitions. [2021-12-28 03:09:29,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 56.875) internal successors, (910), 16 states have internal predecessors, (910), 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) [2021-12-28 03:09:29,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 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) [2021-12-28 03:09:29,954 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 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) [2021-12-28 03:09:29,954 INFO L186 Difference]: Start difference. First operand has 353 places, 1488 transitions, 25330 flow. Second operand 16 states and 910 transitions. [2021-12-28 03:09:29,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1784 transitions, 34189 flow [2021-12-28 03:09:30,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1784 transitions, 33987 flow, removed 83 selfloop flow, removed 7 redundant places. [2021-12-28 03:09:30,639 INFO L242 Difference]: Finished difference. Result has 369 places, 1646 transitions, 28977 flow [2021-12-28 03:09:30,640 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=25154, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=28977, PETRI_PLACES=369, PETRI_TRANSITIONS=1646} [2021-12-28 03:09:30,641 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 295 predicate places. [2021-12-28 03:09:30,641 INFO L470 AbstractCegarLoop]: Abstraction has has 369 places, 1646 transitions, 28977 flow [2021-12-28 03:09:30,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 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) [2021-12-28 03:09:30,641 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:30,642 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] [2021-12-28 03:09:30,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-28 03:09:30,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-28 03:09:30,842 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:30,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:30,843 INFO L85 PathProgramCache]: Analyzing trace with hash 540301936, now seen corresponding path program 10 times [2021-12-28 03:09:30,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:30,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558066510] [2021-12-28 03:09:30,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:30,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:30,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:30,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558066510] [2021-12-28 03:09:30,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558066510] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:09:30,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432410979] [2021-12-28 03:09:30,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 03:09:30,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:09:30,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:09:30,974 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:09:30,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 03:09:31,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 03:09:31,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:09:31,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-28 03:09:31,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:09:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:31,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:09:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 03:09:31,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432410979] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:09:31,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:09:31,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2021-12-28 03:09:31,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534972049] [2021-12-28 03:09:31,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:09:31,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-28 03:09:31,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:31,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-28 03:09:31,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-12-28 03:09:31,684 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-28 03:09:31,686 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1646 transitions, 28977 flow. Second operand has 24 states, 24 states have (on average 53.541666666666664) internal successors, (1285), 24 states have internal predecessors, (1285), 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) [2021-12-28 03:09:31,686 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:31,686 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-28 03:09:31,686 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:34,930 INFO L129 PetriNetUnfolder]: 1622/4164 cut-off events. [2021-12-28 03:09:34,930 INFO L130 PetriNetUnfolder]: For 82597/82597 co-relation queries the response was YES. [2021-12-28 03:09:34,965 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35136 conditions, 4164 events. 1622/4164 cut-off events. For 82597/82597 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 35778 event pairs, 48 based on Foata normal form. 27/4176 useless extension candidates. Maximal degree in co-relation 35028. Up to 1770 conditions per place. [2021-12-28 03:09:35,000 INFO L132 encePairwiseOnDemand]: 65/84 looper letters, 1090 selfloop transitions, 1089 changer transitions 11/2231 dead transitions. [2021-12-28 03:09:35,001 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 2231 transitions, 44432 flow [2021-12-28 03:09:35,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-28 03:09:35,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-12-28 03:09:35,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3263 transitions. [2021-12-28 03:09:35,006 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.647420634920635 [2021-12-28 03:09:35,006 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3263 transitions. [2021-12-28 03:09:35,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3263 transitions. [2021-12-28 03:09:35,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:35,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3263 transitions. [2021-12-28 03:09:35,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 54.38333333333333) internal successors, (3263), 60 states have internal predecessors, (3263), 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) [2021-12-28 03:09:35,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 84.0) internal successors, (5124), 61 states have internal predecessors, (5124), 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) [2021-12-28 03:09:35,020 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 84.0) internal successors, (5124), 61 states have internal predecessors, (5124), 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) [2021-12-28 03:09:35,020 INFO L186 Difference]: Start difference. First operand has 369 places, 1646 transitions, 28977 flow. Second operand 60 states and 3263 transitions. [2021-12-28 03:09:35,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 2231 transitions, 44432 flow [2021-12-28 03:09:35,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 2231 transitions, 44144 flow, removed 128 selfloop flow, removed 6 redundant places. [2021-12-28 03:09:35,999 INFO L242 Difference]: Finished difference. Result has 451 places, 2125 transitions, 42403 flow [2021-12-28 03:09:36,002 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=28755, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=681, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=839, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=42403, PETRI_PLACES=451, PETRI_TRANSITIONS=2125} [2021-12-28 03:09:36,003 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 377 predicate places. [2021-12-28 03:09:36,003 INFO L470 AbstractCegarLoop]: Abstraction has has 451 places, 2125 transitions, 42403 flow [2021-12-28 03:09:36,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.541666666666664) internal successors, (1285), 24 states have internal predecessors, (1285), 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) [2021-12-28 03:09:36,004 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:36,004 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:09:36,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 03:09:36,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-28 03:09:36,224 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:36,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:36,225 INFO L85 PathProgramCache]: Analyzing trace with hash 564935951, now seen corresponding path program 11 times [2021-12-28 03:09:36,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:36,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735668554] [2021-12-28 03:09:36,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:36,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:36,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:36,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735668554] [2021-12-28 03:09:36,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735668554] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:09:36,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229716139] [2021-12-28 03:09:36,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-28 03:09:36,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:09:36,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:09:36,315 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:09:36,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 03:09:36,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-28 03:09:36,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:09:36,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-28 03:09:36,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:09:36,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:36,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:09:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:36,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229716139] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:09:36,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:09:36,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2021-12-28 03:09:36,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401127677] [2021-12-28 03:09:36,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:09:36,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-28 03:09:36,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:36,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-28 03:09:36,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-12-28 03:09:36,877 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-28 03:09:36,878 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 2125 transitions, 42403 flow. Second operand has 21 states, 21 states have (on average 53.80952380952381) internal successors, (1130), 21 states have internal predecessors, (1130), 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) [2021-12-28 03:09:36,878 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:36,878 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-28 03:09:36,878 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:39,938 INFO L129 PetriNetUnfolder]: 1784/4581 cut-off events. [2021-12-28 03:09:39,938 INFO L130 PetriNetUnfolder]: For 123458/123458 co-relation queries the response was YES. [2021-12-28 03:09:39,987 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42750 conditions, 4581 events. 1784/4581 cut-off events. For 123458/123458 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 40291 event pairs, 20 based on Foata normal form. 20/4600 useless extension candidates. Maximal degree in co-relation 42613. Up to 1658 conditions per place. [2021-12-28 03:09:40,025 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 1530 selfloop transitions, 836 changer transitions 25/2432 dead transitions. [2021-12-28 03:09:40,026 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 2432 transitions, 53222 flow [2021-12-28 03:09:40,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-28 03:09:40,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-28 03:09:40,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1071 transitions. [2021-12-28 03:09:40,033 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6710526315789473 [2021-12-28 03:09:40,033 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1071 transitions. [2021-12-28 03:09:40,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1071 transitions. [2021-12-28 03:09:40,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:40,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1071 transitions. [2021-12-28 03:09:40,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 56.36842105263158) internal successors, (1071), 19 states have internal predecessors, (1071), 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) [2021-12-28 03:09:40,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 84.0) internal successors, (1680), 20 states have internal predecessors, (1680), 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) [2021-12-28 03:09:40,111 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 84.0) internal successors, (1680), 20 states have internal predecessors, (1680), 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) [2021-12-28 03:09:40,111 INFO L186 Difference]: Start difference. First operand has 451 places, 2125 transitions, 42403 flow. Second operand 19 states and 1071 transitions. [2021-12-28 03:09:40,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 2432 transitions, 53222 flow [2021-12-28 03:09:41,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 2432 transitions, 52251 flow, removed 467 selfloop flow, removed 9 redundant places. [2021-12-28 03:09:41,801 INFO L242 Difference]: Finished difference. Result has 467 places, 2280 transitions, 47920 flow [2021-12-28 03:09:41,803 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=41474, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=692, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=47920, PETRI_PLACES=467, PETRI_TRANSITIONS=2280} [2021-12-28 03:09:41,804 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 393 predicate places. [2021-12-28 03:09:41,804 INFO L470 AbstractCegarLoop]: Abstraction has has 467 places, 2280 transitions, 47920 flow [2021-12-28 03:09:41,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.80952380952381) internal successors, (1130), 21 states have internal predecessors, (1130), 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) [2021-12-28 03:09:41,805 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:41,805 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:09:41,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 03:09:42,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-28 03:09:42,029 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:42,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:42,029 INFO L85 PathProgramCache]: Analyzing trace with hash 112799897, now seen corresponding path program 12 times [2021-12-28 03:09:42,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:42,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147228466] [2021-12-28 03:09:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:42,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:42,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:42,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147228466] [2021-12-28 03:09:42,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147228466] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:09:42,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145996275] [2021-12-28 03:09:42,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-28 03:09:42,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:09:42,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:09:42,196 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:09:42,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 03:09:42,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-28 03:09:42,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:09:42,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-28 03:09:42,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:09:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:42,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:09:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:42,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145996275] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:09:42,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:09:42,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-12-28 03:09:42,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858454118] [2021-12-28 03:09:42,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:09:42,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-28 03:09:42,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:42,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-28 03:09:42,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-12-28 03:09:42,729 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-28 03:09:42,730 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 2280 transitions, 47920 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 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) [2021-12-28 03:09:42,730 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:42,730 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-28 03:09:42,730 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:47,697 INFO L129 PetriNetUnfolder]: 2209/5776 cut-off events. [2021-12-28 03:09:47,697 INFO L130 PetriNetUnfolder]: For 196158/196158 co-relation queries the response was YES. [2021-12-28 03:09:47,767 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57480 conditions, 5776 events. 2209/5776 cut-off events. For 196158/196158 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 51911 event pairs, 24 based on Foata normal form. 27/5801 useless extension candidates. Maximal degree in co-relation 57336. Up to 1537 conditions per place. [2021-12-28 03:09:47,803 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 1427 selfloop transitions, 1585 changer transitions 34/3087 dead transitions. [2021-12-28 03:09:47,803 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 3087 transitions, 72012 flow [2021-12-28 03:09:47,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-28 03:09:47,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-12-28 03:09:47,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3701 transitions. [2021-12-28 03:09:47,808 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6576048329779673 [2021-12-28 03:09:47,808 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3701 transitions. [2021-12-28 03:09:47,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3701 transitions. [2021-12-28 03:09:47,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:47,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3701 transitions. [2021-12-28 03:09:47,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 55.23880597014925) internal successors, (3701), 67 states have internal predecessors, (3701), 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) [2021-12-28 03:09:47,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 84.0) internal successors, (5712), 68 states have internal predecessors, (5712), 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) [2021-12-28 03:09:47,822 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 84.0) internal successors, (5712), 68 states have internal predecessors, (5712), 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) [2021-12-28 03:09:47,822 INFO L186 Difference]: Start difference. First operand has 467 places, 2280 transitions, 47920 flow. Second operand 67 states and 3701 transitions. [2021-12-28 03:09:47,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 3087 transitions, 72012 flow [2021-12-28 03:09:50,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 3087 transitions, 71402 flow, removed 252 selfloop flow, removed 8 redundant places. [2021-12-28 03:09:50,225 INFO L242 Difference]: Finished difference. Result has 560 places, 2887 transitions, 67956 flow [2021-12-28 03:09:50,227 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=47589, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1055, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=67956, PETRI_PLACES=560, PETRI_TRANSITIONS=2887} [2021-12-28 03:09:50,228 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 486 predicate places. [2021-12-28 03:09:50,228 INFO L470 AbstractCegarLoop]: Abstraction has has 560 places, 2887 transitions, 67956 flow [2021-12-28 03:09:50,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 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) [2021-12-28 03:09:50,229 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:09:50,229 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:09:50,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-28 03:09:50,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-28 03:09:50,451 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:09:50,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:09:50,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1113820109, now seen corresponding path program 13 times [2021-12-28 03:09:50,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:09:50,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025546975] [2021-12-28 03:09:50,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:09:50,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:09:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:50,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:09:50,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025546975] [2021-12-28 03:09:50,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025546975] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:09:50,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216022904] [2021-12-28 03:09:50,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-28 03:09:50,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:09:50,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:09:50,539 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:09:50,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-28 03:09:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:09:50,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-28 03:09:50,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:09:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:50,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:09:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:09:51,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216022904] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:09:51,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:09:51,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2021-12-28 03:09:51,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630073461] [2021-12-28 03:09:51,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:09:51,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-28 03:09:51,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:09:51,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-28 03:09:51,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-12-28 03:09:51,131 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-28 03:09:51,132 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 2887 transitions, 67956 flow. Second operand has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 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) [2021-12-28 03:09:51,132 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:09:51,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-28 03:09:51,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 03:09:58,376 INFO L129 PetriNetUnfolder]: 2771/6897 cut-off events. [2021-12-28 03:09:58,377 INFO L130 PetriNetUnfolder]: For 252992/252992 co-relation queries the response was YES. [2021-12-28 03:09:58,533 INFO L84 FinitePrefix]: Finished finitePrefix Result has 76884 conditions, 6897 events. 2771/6897 cut-off events. For 252992/252992 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 62086 event pairs, 63 based on Foata normal form. 4/6871 useless extension candidates. Maximal degree in co-relation 76706. Up to 2758 conditions per place. [2021-12-28 03:09:58,595 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 2004 selfloop transitions, 1770 changer transitions 16/3831 dead transitions. [2021-12-28 03:09:58,595 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 3831 transitions, 98908 flow [2021-12-28 03:09:58,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-28 03:09:58,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-12-28 03:09:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2628 transitions. [2021-12-28 03:09:58,599 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6517857142857143 [2021-12-28 03:09:58,599 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2628 transitions. [2021-12-28 03:09:58,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2628 transitions. [2021-12-28 03:09:58,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 03:09:58,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2628 transitions. [2021-12-28 03:09:58,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 54.75) internal successors, (2628), 48 states have internal predecessors, (2628), 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) [2021-12-28 03:09:58,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 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) [2021-12-28 03:09:58,610 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 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) [2021-12-28 03:09:58,610 INFO L186 Difference]: Start difference. First operand has 560 places, 2887 transitions, 67956 flow. Second operand 48 states and 2628 transitions. [2021-12-28 03:09:58,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 3831 transitions, 98908 flow [2021-12-28 03:10:03,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 3831 transitions, 95167 flow, removed 1769 selfloop flow, removed 10 redundant places. [2021-12-28 03:10:03,629 INFO L242 Difference]: Finished difference. Result has 618 places, 3618 transitions, 90388 flow [2021-12-28 03:10:03,632 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=64885, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2887, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=90388, PETRI_PLACES=618, PETRI_TRANSITIONS=3618} [2021-12-28 03:10:03,633 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 544 predicate places. [2021-12-28 03:10:03,633 INFO L470 AbstractCegarLoop]: Abstraction has has 618 places, 3618 transitions, 90388 flow [2021-12-28 03:10:03,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 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) [2021-12-28 03:10:03,634 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 03:10:03,634 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:10:03,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-28 03:10:03,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-28 03:10:03,843 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 03:10:03,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:10:03,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1983119535, now seen corresponding path program 14 times [2021-12-28 03:10:03,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:10:03,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121407090] [2021-12-28 03:10:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:10:03,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:10:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:10:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:10:03,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:10:03,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121407090] [2021-12-28 03:10:03,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121407090] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:10:03,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688403291] [2021-12-28 03:10:03,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:10:03,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:10:03,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:10:03,936 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:10:03,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-28 03:10:03,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 03:10:03,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:10:04,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-28 03:10:04,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:10:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:10:04,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:10:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:10:04,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688403291] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:10:04,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:10:04,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-12-28 03:10:04,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380235673] [2021-12-28 03:10:04,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:10:04,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-28 03:10:04,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:10:04,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-28 03:10:04,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-12-28 03:10:04,486 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-28 03:10:04,486 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 3618 transitions, 90388 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 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) [2021-12-28 03:10:04,487 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 03:10:04,487 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-28 03:10:04,487 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand