./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-figure1-alt.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 fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:51:54,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:51:54,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:51:54,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:51:54,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:51:54,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:51:54,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:51:54,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:51:54,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:51:54,734 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:51:54,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:51:54,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:51:54,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:51:54,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:51:54,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:51:54,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:51:54,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:51:54,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:51:54,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:51:54,745 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:51:54,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:51:54,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:51:54,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:51:54,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:51:54,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:51:54,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:51:54,752 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:51:54,753 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:51:54,753 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:51:54,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:51:54,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:51:54,755 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:51:54,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:51:54,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:51:54,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:51:54,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:51:54,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:51:54,758 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:51:54,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:51:54,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:51:54,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:51:54,760 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:51:54,782 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:51:54,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:51:54,783 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:51:54,783 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:51:54,784 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:51:54,784 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:51:54,784 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:51:54,784 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:51:54,785 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:51:54,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:51:54,785 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:51:54,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:51:54,786 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:51:54,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:51:54,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:51:54,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:51:54,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:51:54,786 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:51:54,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:51:54,787 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:51:54,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:51:54,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:51:54,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:51:54,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:51:54,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:51:54,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:51:54,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:51:54,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:51:54,789 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:51:54,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:51:54,789 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:51:54,789 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:51:54,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:51:54,789 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:51:54,789 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 [2021-12-14 16:51:54,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:51:54,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:51:54,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:51:54,985 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:51:54,985 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:51:54,986 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2021-12-14 16:51:55,048 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11b803509/f52d7e97eec44434b17b539c5daaf53a/FLAGda50a9c8f [2021-12-14 16:51:55,352 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:51:55,353 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2021-12-14 16:51:55,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11b803509/f52d7e97eec44434b17b539c5daaf53a/FLAGda50a9c8f [2021-12-14 16:51:55,791 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11b803509/f52d7e97eec44434b17b539c5daaf53a [2021-12-14 16:51:55,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:51:55,794 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:51:55,797 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:51:55,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:51:55,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:51:55,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:51:55" (1/1) ... [2021-12-14 16:51:55,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e6b2933 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:55, skipping insertion in model container [2021-12-14 16:51:55,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:51:55" (1/1) ... [2021-12-14 16:51:55,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:51:55,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:51:55,943 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2021-12-14 16:51:55,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:51:55,950 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:51:55,967 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2021-12-14 16:51:55,968 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:51:55,977 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:51:55,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:55 WrapperNode [2021-12-14 16:51:55,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:51:55,978 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:51:55,978 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:51:55,978 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:51:55,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:55" (1/1) ... [2021-12-14 16:51:55,987 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:55" (1/1) ... [2021-12-14 16:51:55,998 INFO L137 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 76 [2021-12-14 16:51:55,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:51:55,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:51:55,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:51:55,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:51:56,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:55" (1/1) ... [2021-12-14 16:51:56,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:55" (1/1) ... [2021-12-14 16:51:56,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:55" (1/1) ... [2021-12-14 16:51:56,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:55" (1/1) ... [2021-12-14 16:51:56,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:55" (1/1) ... [2021-12-14 16:51:56,017 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:55" (1/1) ... [2021-12-14 16:51:56,018 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:55" (1/1) ... [2021-12-14 16:51:56,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:51:56,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:51:56,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:51:56,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:51:56,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:55" (1/1) ... [2021-12-14 16:51:56,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:51:56,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:51:56,045 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) [2021-12-14 16:51:56,047 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 [2021-12-14 16:51:56,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:51:56,074 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-14 16:51:56,074 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-14 16:51:56,074 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-14 16:51:56,074 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-14 16:51:56,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:51:56,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 16:51:56,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 16:51:56,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-14 16:51:56,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-14 16:51:56,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:51:56,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:51:56,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 16:51:56,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 16:51:56,078 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-14 16:51:56,135 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:51:56,136 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:51:56,251 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:51:56,275 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:51:56,276 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 16:51:56,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:51:56 BoogieIcfgContainer [2021-12-14 16:51:56,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:51:56,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:51:56,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:51:56,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:51:56,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:51:55" (1/3) ... [2021-12-14 16:51:56,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495f8a3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:51:56, skipping insertion in model container [2021-12-14 16:51:56,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:51:55" (2/3) ... [2021-12-14 16:51:56,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495f8a3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:51:56, skipping insertion in model container [2021-12-14 16:51:56,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:51:56" (3/3) ... [2021-12-14 16:51:56,283 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2021-12-14 16:51:56,286 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-14 16:51:56,286 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:51:56,287 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 16:51:56,287 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-14 16:51:56,307 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,310 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,310 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,311 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,311 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,311 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,311 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,312 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,312 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,312 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,312 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,312 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,313 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,313 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,335 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,335 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,336 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,336 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,336 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,336 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,336 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,336 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,337 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,337 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,337 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,337 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,337 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,337 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,338 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,338 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,338 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,338 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,338 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,338 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,338 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,338 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,338 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,339 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,339 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,339 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,339 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,339 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,339 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,339 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,340 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,340 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,340 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,340 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,342 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,342 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,343 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,343 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,343 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,343 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,343 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,344 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,344 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,345 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,345 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,345 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:51:56,349 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-14 16:51:56,397 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:51:56,408 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 [2021-12-14 16:51:56,409 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-14 16:51:56,422 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 194 flow [2021-12-14 16:51:56,454 INFO L129 PetriNetUnfolder]: 6/87 cut-off events. [2021-12-14 16:51:56,455 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-14 16:51:56,457 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 6/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2021-12-14 16:51:56,457 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 194 flow [2021-12-14 16:51:56,460 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 78 transitions, 168 flow [2021-12-14 16:51:56,473 INFO L129 PetriNetUnfolder]: 6/77 cut-off events. [2021-12-14 16:51:56,474 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-14 16:51:56,474 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:51:56,475 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] [2021-12-14 16:51:56,475 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:51:56,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:51:56,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1515800342, now seen corresponding path program 1 times [2021-12-14 16:51:56,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:51:56,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443874808] [2021-12-14 16:51:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:56,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:51:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:51:56,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:51:56,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443874808] [2021-12-14 16:51:56,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443874808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:51:56,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:51:56,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:51:56,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704286193] [2021-12-14 16:51:56,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:51:56,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 16:51:56,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:51:56,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 16:51:56,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 16:51:56,713 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 89 [2021-12-14 16:51:56,716 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 168 flow. Second operand has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:56,716 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:51:56,717 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 89 [2021-12-14 16:51:56,718 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:51:56,778 INFO L129 PetriNetUnfolder]: 11/107 cut-off events. [2021-12-14 16:51:56,779 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2021-12-14 16:51:56,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 107 events. 11/107 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 146 event pairs, 3 based on Foata normal form. 11/109 useless extension candidates. Maximal degree in co-relation 67. Up to 19 conditions per place. [2021-12-14 16:51:56,782 INFO L132 encePairwiseOnDemand]: 85/89 looper letters, 6 selfloop transitions, 0 changer transitions 2/74 dead transitions. [2021-12-14 16:51:56,783 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 172 flow [2021-12-14 16:51:56,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 16:51:56,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-14 16:51:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 166 transitions. [2021-12-14 16:51:56,793 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9325842696629213 [2021-12-14 16:51:56,794 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 166 transitions. [2021-12-14 16:51:56,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 166 transitions. [2021-12-14 16:51:56,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:51:56,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 166 transitions. [2021-12-14 16:51:56,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:56,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:56,807 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:56,808 INFO L186 Difference]: Start difference. First operand has 79 places, 78 transitions, 168 flow. Second operand 2 states and 166 transitions. [2021-12-14 16:51:56,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 172 flow [2021-12-14 16:51:56,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-14 16:51:56,819 INFO L242 Difference]: Finished difference. Result has 76 places, 72 transitions, 148 flow [2021-12-14 16:51:56,821 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=148, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2021-12-14 16:51:56,824 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2021-12-14 16:51:56,824 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 148 flow [2021-12-14 16:51:56,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:56,825 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:51:56,825 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] [2021-12-14 16:51:56,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:51:56,825 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:51:56,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:51:56,827 INFO L85 PathProgramCache]: Analyzing trace with hash -79113043, now seen corresponding path program 1 times [2021-12-14 16:51:56,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:51:56,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417146221] [2021-12-14 16:51:56,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:56,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:51:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:51:57,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:51:57,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417146221] [2021-12-14 16:51:57,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417146221] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:51:57,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:51:57,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-14 16:51:57,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561296535] [2021-12-14 16:51:57,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:51:57,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 16:51:57,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:51:57,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 16:51:57,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-14 16:51:57,369 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-14 16:51:57,369 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 148 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:57,369 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:51:57,370 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-14 16:51:57,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:51:57,702 INFO L129 PetriNetUnfolder]: 67/248 cut-off events. [2021-12-14 16:51:57,702 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-12-14 16:51:57,704 INFO L84 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 248 events. 67/248 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 955 event pairs, 34 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 417. Up to 102 conditions per place. [2021-12-14 16:51:57,706 INFO L132 encePairwiseOnDemand]: 76/89 looper letters, 43 selfloop transitions, 11 changer transitions 6/103 dead transitions. [2021-12-14 16:51:57,706 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 337 flow [2021-12-14 16:51:57,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 16:51:57,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-14 16:51:57,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 698 transitions. [2021-12-14 16:51:57,712 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.653558052434457 [2021-12-14 16:51:57,712 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 698 transitions. [2021-12-14 16:51:57,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 698 transitions. [2021-12-14 16:51:57,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:51:57,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 698 transitions. [2021-12-14 16:51:57,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.166666666666664) internal successors, (698), 12 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:57,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:57,719 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:57,719 INFO L186 Difference]: Start difference. First operand has 76 places, 72 transitions, 148 flow. Second operand 12 states and 698 transitions. [2021-12-14 16:51:57,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 337 flow [2021-12-14 16:51:57,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 103 transitions, 337 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-14 16:51:57,723 INFO L242 Difference]: Finished difference. Result has 92 places, 79 transitions, 213 flow [2021-12-14 16:51:57,723 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=213, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2021-12-14 16:51:57,723 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 13 predicate places. [2021-12-14 16:51:57,724 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 213 flow [2021-12-14 16:51:57,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:57,724 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:51:57,725 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] [2021-12-14 16:51:57,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:51:57,725 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:51:57,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:51:57,726 INFO L85 PathProgramCache]: Analyzing trace with hash -42932599, now seen corresponding path program 2 times [2021-12-14 16:51:57,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:51:57,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444541516] [2021-12-14 16:51:57,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:57,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:51:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:51:58,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:51:58,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444541516] [2021-12-14 16:51:58,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444541516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:51:58,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:51:58,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-14 16:51:58,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841423659] [2021-12-14 16:51:58,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:51:58,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 16:51:58,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:51:58,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 16:51:58,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-14 16:51:58,068 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-14 16:51:58,069 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:58,069 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:51:58,069 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-14 16:51:58,069 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:51:58,324 INFO L129 PetriNetUnfolder]: 68/263 cut-off events. [2021-12-14 16:51:58,324 INFO L130 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2021-12-14 16:51:58,327 INFO L84 FinitePrefix]: Finished finitePrefix Result has 541 conditions, 263 events. 68/263 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1086 event pairs, 35 based on Foata normal form. 1/260 useless extension candidates. Maximal degree in co-relation 530. Up to 102 conditions per place. [2021-12-14 16:51:58,328 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 40 selfloop transitions, 11 changer transitions 11/105 dead transitions. [2021-12-14 16:51:58,328 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 105 transitions, 429 flow [2021-12-14 16:51:58,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 16:51:58,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-14 16:51:58,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 695 transitions. [2021-12-14 16:51:58,331 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.650749063670412 [2021-12-14 16:51:58,331 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 695 transitions. [2021-12-14 16:51:58,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 695 transitions. [2021-12-14 16:51:58,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:51:58,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 695 transitions. [2021-12-14 16:51:58,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:58,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:58,338 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:58,338 INFO L186 Difference]: Start difference. First operand has 92 places, 79 transitions, 213 flow. Second operand 12 states and 695 transitions. [2021-12-14 16:51:58,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 105 transitions, 429 flow [2021-12-14 16:51:58,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 105 transitions, 407 flow, removed 8 selfloop flow, removed 6 redundant places. [2021-12-14 16:51:58,344 INFO L242 Difference]: Finished difference. Result has 100 places, 80 transitions, 247 flow [2021-12-14 16:51:58,345 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=247, PETRI_PLACES=100, PETRI_TRANSITIONS=80} [2021-12-14 16:51:58,346 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 21 predicate places. [2021-12-14 16:51:58,346 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 80 transitions, 247 flow [2021-12-14 16:51:58,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:58,347 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:51:58,347 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] [2021-12-14 16:51:58,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:51:58,348 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:51:58,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:51:58,349 INFO L85 PathProgramCache]: Analyzing trace with hash -9274299, now seen corresponding path program 3 times [2021-12-14 16:51:58,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:51:58,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330673360] [2021-12-14 16:51:58,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:58,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:51:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:51:58,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:51:58,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330673360] [2021-12-14 16:51:58,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330673360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:51:58,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:51:58,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-14 16:51:58,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281854537] [2021-12-14 16:51:58,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:51:58,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 16:51:58,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:51:58,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 16:51:58,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-14 16:51:58,669 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-14 16:51:58,670 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 80 transitions, 247 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:58,670 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:51:58,670 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-14 16:51:58,670 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:51:58,961 INFO L129 PetriNetUnfolder]: 72/296 cut-off events. [2021-12-14 16:51:58,961 INFO L130 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2021-12-14 16:51:58,962 INFO L84 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 296 events. 72/296 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1335 event pairs, 37 based on Foata normal form. 1/291 useless extension candidates. Maximal degree in co-relation 652. Up to 105 conditions per place. [2021-12-14 16:51:58,963 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 48 selfloop transitions, 14 changer transitions 8/113 dead transitions. [2021-12-14 16:51:58,963 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 519 flow [2021-12-14 16:51:58,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 16:51:58,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-14 16:51:58,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 704 transitions. [2021-12-14 16:51:58,965 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6591760299625468 [2021-12-14 16:51:58,965 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 704 transitions. [2021-12-14 16:51:58,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 704 transitions. [2021-12-14 16:51:58,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:51:58,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 704 transitions. [2021-12-14 16:51:58,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.666666666666664) internal successors, (704), 12 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:58,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:58,968 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:58,968 INFO L186 Difference]: Start difference. First operand has 100 places, 80 transitions, 247 flow. Second operand 12 states and 704 transitions. [2021-12-14 16:51:58,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 519 flow [2021-12-14 16:51:58,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 113 transitions, 474 flow, removed 14 selfloop flow, removed 9 redundant places. [2021-12-14 16:51:58,971 INFO L242 Difference]: Finished difference. Result has 104 places, 84 transitions, 301 flow [2021-12-14 16:51:58,972 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=301, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2021-12-14 16:51:58,972 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 25 predicate places. [2021-12-14 16:51:58,972 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 301 flow [2021-12-14 16:51:58,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:58,973 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:51:58,973 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] [2021-12-14 16:51:58,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:51:58,973 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:51:58,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:51:58,974 INFO L85 PathProgramCache]: Analyzing trace with hash 269524785, now seen corresponding path program 4 times [2021-12-14 16:51:58,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:51:58,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953278418] [2021-12-14 16:51:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:58,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:51:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:51:59,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:51:59,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953278418] [2021-12-14 16:51:59,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953278418] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:51:59,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:51:59,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-14 16:51:59,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260578894] [2021-12-14 16:51:59,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:51:59,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 16:51:59,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:51:59,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 16:51:59,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-12-14 16:51:59,237 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-14 16:51:59,238 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 301 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:59,238 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:51:59,238 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-14 16:51:59,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:51:59,544 INFO L129 PetriNetUnfolder]: 71/297 cut-off events. [2021-12-14 16:51:59,545 INFO L130 PetriNetUnfolder]: For 225/234 co-relation queries the response was YES. [2021-12-14 16:51:59,545 INFO L84 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 297 events. 71/297 cut-off events. For 225/234 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1363 event pairs, 40 based on Foata normal form. 3/293 useless extension candidates. Maximal degree in co-relation 670. Up to 105 conditions per place. [2021-12-14 16:51:59,546 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 50 selfloop transitions, 15 changer transitions 6/114 dead transitions. [2021-12-14 16:51:59,546 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 114 transitions, 559 flow [2021-12-14 16:51:59,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 16:51:59,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-14 16:51:59,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 703 transitions. [2021-12-14 16:51:59,548 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6582397003745318 [2021-12-14 16:51:59,548 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 703 transitions. [2021-12-14 16:51:59,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 703 transitions. [2021-12-14 16:51:59,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:51:59,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 703 transitions. [2021-12-14 16:51:59,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.583333333333336) internal successors, (703), 12 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:59,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:59,552 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:59,552 INFO L186 Difference]: Start difference. First operand has 104 places, 84 transitions, 301 flow. Second operand 12 states and 703 transitions. [2021-12-14 16:51:59,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 114 transitions, 559 flow [2021-12-14 16:51:59,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 114 transitions, 520 flow, removed 11 selfloop flow, removed 8 redundant places. [2021-12-14 16:51:59,555 INFO L242 Difference]: Finished difference. Result has 110 places, 86 transitions, 352 flow [2021-12-14 16:51:59,556 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=352, PETRI_PLACES=110, PETRI_TRANSITIONS=86} [2021-12-14 16:51:59,556 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 31 predicate places. [2021-12-14 16:51:59,556 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 86 transitions, 352 flow [2021-12-14 16:51:59,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:59,557 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:51:59,557 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] [2021-12-14 16:51:59,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:51:59,557 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:51:59,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:51:59,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1546636013, now seen corresponding path program 5 times [2021-12-14 16:51:59,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:51:59,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753381691] [2021-12-14 16:51:59,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:51:59,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:51:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:51:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:51:59,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:51:59,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753381691] [2021-12-14 16:51:59,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753381691] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:51:59,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:51:59,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-14 16:51:59,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224217047] [2021-12-14 16:51:59,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:51:59,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 16:51:59,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:51:59,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 16:51:59,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-14 16:51:59,780 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-14 16:51:59,781 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 86 transitions, 352 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:51:59,781 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:51:59,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-14 16:51:59,781 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:52:00,037 INFO L129 PetriNetUnfolder]: 71/283 cut-off events. [2021-12-14 16:52:00,037 INFO L130 PetriNetUnfolder]: For 320/332 co-relation queries the response was YES. [2021-12-14 16:52:00,038 INFO L84 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 283 events. 71/283 cut-off events. For 320/332 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1255 event pairs, 34 based on Foata normal form. 4/282 useless extension candidates. Maximal degree in co-relation 676. Up to 105 conditions per place. [2021-12-14 16:52:00,039 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 42 selfloop transitions, 14 changer transitions 9/108 dead transitions. [2021-12-14 16:52:00,039 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 563 flow [2021-12-14 16:52:00,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 16:52:00,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-14 16:52:00,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 696 transitions. [2021-12-14 16:52:00,041 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.651685393258427 [2021-12-14 16:52:00,041 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 696 transitions. [2021-12-14 16:52:00,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 696 transitions. [2021-12-14 16:52:00,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:52:00,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 696 transitions. [2021-12-14 16:52:00,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:00,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:00,044 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:00,045 INFO L186 Difference]: Start difference. First operand has 110 places, 86 transitions, 352 flow. Second operand 12 states and 696 transitions. [2021-12-14 16:52:00,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 563 flow [2021-12-14 16:52:00,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 108 transitions, 526 flow, removed 10 selfloop flow, removed 8 redundant places. [2021-12-14 16:52:00,048 INFO L242 Difference]: Finished difference. Result has 115 places, 86 transitions, 368 flow [2021-12-14 16:52:00,049 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=368, PETRI_PLACES=115, PETRI_TRANSITIONS=86} [2021-12-14 16:52:00,051 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 36 predicate places. [2021-12-14 16:52:00,051 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 86 transitions, 368 flow [2021-12-14 16:52:00,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:00,051 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:52:00,052 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] [2021-12-14 16:52:00,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:52:00,052 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:52:00,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:52:00,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1009642839, now seen corresponding path program 6 times [2021-12-14 16:52:00,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:52:00,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439856678] [2021-12-14 16:52:00,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:52:00,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:52:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:52:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:00,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:52:00,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439856678] [2021-12-14 16:52:00,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439856678] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:52:00,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:52:00,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-14 16:52:00,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832439983] [2021-12-14 16:52:00,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:52:00,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 16:52:00,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:52:00,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 16:52:00,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-14 16:52:00,325 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2021-12-14 16:52:00,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 86 transitions, 368 flow. Second operand has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:00,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:52:00,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2021-12-14 16:52:00,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:52:00,565 INFO L129 PetriNetUnfolder]: 68/250 cut-off events. [2021-12-14 16:52:00,565 INFO L130 PetriNetUnfolder]: For 316/316 co-relation queries the response was YES. [2021-12-14 16:52:00,566 INFO L84 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 250 events. 68/250 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1003 event pairs, 34 based on Foata normal form. 1/246 useless extension candidates. Maximal degree in co-relation 620. Up to 105 conditions per place. [2021-12-14 16:52:00,567 INFO L132 encePairwiseOnDemand]: 77/89 looper letters, 34 selfloop transitions, 14 changer transitions 11/102 dead transitions. [2021-12-14 16:52:00,567 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 102 transitions, 547 flow [2021-12-14 16:52:00,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 16:52:00,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-14 16:52:00,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 690 transitions. [2021-12-14 16:52:00,569 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6460674157303371 [2021-12-14 16:52:00,570 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 690 transitions. [2021-12-14 16:52:00,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 690 transitions. [2021-12-14 16:52:00,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:52:00,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 690 transitions. [2021-12-14 16:52:00,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.5) internal successors, (690), 12 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:00,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:00,573 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:00,573 INFO L186 Difference]: Start difference. First operand has 115 places, 86 transitions, 368 flow. Second operand 12 states and 690 transitions. [2021-12-14 16:52:00,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 102 transitions, 547 flow [2021-12-14 16:52:00,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 102 transitions, 499 flow, removed 9 selfloop flow, removed 12 redundant places. [2021-12-14 16:52:00,576 INFO L242 Difference]: Finished difference. Result has 114 places, 85 transitions, 350 flow [2021-12-14 16:52:00,576 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=350, PETRI_PLACES=114, PETRI_TRANSITIONS=85} [2021-12-14 16:52:00,576 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 35 predicate places. [2021-12-14 16:52:00,576 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 85 transitions, 350 flow [2021-12-14 16:52:00,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.61538461538461) internal successors, (710), 13 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:00,577 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:52:00,577 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] [2021-12-14 16:52:00,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:52:00,577 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:52:00,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:52:00,578 INFO L85 PathProgramCache]: Analyzing trace with hash 239848237, now seen corresponding path program 1 times [2021-12-14 16:52:00,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:52:00,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292692946] [2021-12-14 16:52:00,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:52:00,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:52:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:52:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:00,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:52:00,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292692946] [2021-12-14 16:52:00,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292692946] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:52:00,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145562390] [2021-12-14 16:52:00,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:52:00,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:00,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:52:00,807 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) [2021-12-14 16:52:00,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:52:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:52:00,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 16:52:00,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:52:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:01,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:52:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:01,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145562390] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:52:01,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:52:01,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-14 16:52:01,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905324315] [2021-12-14 16:52:01,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:52:01,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-14 16:52:01,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:52:01,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-14 16:52:01,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-12-14 16:52:01,989 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-14 16:52:01,991 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 85 transitions, 350 flow. Second operand has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 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) [2021-12-14 16:52:01,991 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:52:01,991 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-14 16:52:01,991 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:52:03,496 INFO L129 PetriNetUnfolder]: 168/590 cut-off events. [2021-12-14 16:52:03,496 INFO L130 PetriNetUnfolder]: For 383/383 co-relation queries the response was YES. [2021-12-14 16:52:03,497 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1316 conditions, 590 events. 168/590 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3240 event pairs, 9 based on Foata normal form. 13/603 useless extension candidates. Maximal degree in co-relation 1295. Up to 111 conditions per place. [2021-12-14 16:52:03,499 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 114 selfloop transitions, 82 changer transitions 13/251 dead transitions. [2021-12-14 16:52:03,499 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 251 transitions, 1334 flow [2021-12-14 16:52:03,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-14 16:52:03,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-12-14 16:52:03,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2702 transitions. [2021-12-14 16:52:03,505 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6324906367041199 [2021-12-14 16:52:03,505 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2702 transitions. [2021-12-14 16:52:03,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2702 transitions. [2021-12-14 16:52:03,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:52:03,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2702 transitions. [2021-12-14 16:52:03,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 56.291666666666664) internal successors, (2702), 48 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:03,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:03,517 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:03,517 INFO L186 Difference]: Start difference. First operand has 114 places, 85 transitions, 350 flow. Second operand 48 states and 2702 transitions. [2021-12-14 16:52:03,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 251 transitions, 1334 flow [2021-12-14 16:52:03,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 251 transitions, 1228 flow, removed 24 selfloop flow, removed 16 redundant places. [2021-12-14 16:52:03,521 INFO L242 Difference]: Finished difference. Result has 152 places, 152 transitions, 752 flow [2021-12-14 16:52:03,522 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=752, PETRI_PLACES=152, PETRI_TRANSITIONS=152} [2021-12-14 16:52:03,524 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 73 predicate places. [2021-12-14 16:52:03,524 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 152 transitions, 752 flow [2021-12-14 16:52:03,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 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) [2021-12-14 16:52:03,525 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:52:03,525 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] [2021-12-14 16:52:03,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 16:52:03,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:03,741 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:52:03,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:52:03,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1281133469, now seen corresponding path program 2 times [2021-12-14 16:52:03,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:52:03,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517447702] [2021-12-14 16:52:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:52:03,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:52:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:52:03,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:03,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:52:03,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517447702] [2021-12-14 16:52:03,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517447702] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:52:03,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975291695] [2021-12-14 16:52:03,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 16:52:03,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:03,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:52:03,949 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) [2021-12-14 16:52:03,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:52:03,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 16:52:03,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:52:03,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 16:52:03,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:52:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:04,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:52:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:05,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975291695] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:52:05,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:52:05,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-14 16:52:05,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938217449] [2021-12-14 16:52:05,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:52:05,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-14 16:52:05,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:52:05,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-14 16:52:05,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-12-14 16:52:05,043 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-14 16:52:05,044 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 152 transitions, 752 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:05,044 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:52:05,044 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-14 16:52:05,044 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:52:06,263 INFO L129 PetriNetUnfolder]: 210/755 cut-off events. [2021-12-14 16:52:06,264 INFO L130 PetriNetUnfolder]: For 675/689 co-relation queries the response was YES. [2021-12-14 16:52:06,266 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2089 conditions, 755 events. 210/755 cut-off events. For 675/689 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4606 event pairs, 27 based on Foata normal form. 5/758 useless extension candidates. Maximal degree in co-relation 2064. Up to 213 conditions per place. [2021-12-14 16:52:06,268 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 100 selfloop transitions, 122 changer transitions 6/270 dead transitions. [2021-12-14 16:52:06,269 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 270 transitions, 1798 flow [2021-12-14 16:52:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-14 16:52:06,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-14 16:52:06,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2186 transitions. [2021-12-14 16:52:06,271 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6297896859694613 [2021-12-14 16:52:06,271 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2186 transitions. [2021-12-14 16:52:06,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2186 transitions. [2021-12-14 16:52:06,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:52:06,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2186 transitions. [2021-12-14 16:52:06,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.05128205128205) internal successors, (2186), 39 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:06,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:06,281 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:06,281 INFO L186 Difference]: Start difference. First operand has 152 places, 152 transitions, 752 flow. Second operand 39 states and 2186 transitions. [2021-12-14 16:52:06,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 270 transitions, 1798 flow [2021-12-14 16:52:06,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 270 transitions, 1645 flow, removed 61 selfloop flow, removed 9 redundant places. [2021-12-14 16:52:06,294 INFO L242 Difference]: Finished difference. Result has 186 places, 205 transitions, 1291 flow [2021-12-14 16:52:06,294 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1291, PETRI_PLACES=186, PETRI_TRANSITIONS=205} [2021-12-14 16:52:06,295 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 107 predicate places. [2021-12-14 16:52:06,295 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 205 transitions, 1291 flow [2021-12-14 16:52:06,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:06,296 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:52:06,296 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] [2021-12-14 16:52:06,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 16:52:06,512 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,SelfDestructingSolverStorable8 [2021-12-14 16:52:06,512 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:52:06,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:52:06,512 INFO L85 PathProgramCache]: Analyzing trace with hash -333452397, now seen corresponding path program 3 times [2021-12-14 16:52:06,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:52:06,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214769246] [2021-12-14 16:52:06,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:52:06,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:52:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:52:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:06,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:52:06,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214769246] [2021-12-14 16:52:06,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214769246] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:52:06,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237568274] [2021-12-14 16:52:06,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 16:52:06,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:06,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:52:06,755 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) [2021-12-14 16:52:06,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 16:52:06,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-14 16:52:06,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:52:06,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 16:52:06,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:52:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:07,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:52:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:07,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237568274] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:52:07,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:52:07,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-14 16:52:07,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88699534] [2021-12-14 16:52:07,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:52:07,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-14 16:52:07,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:52:07,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-14 16:52:07,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2021-12-14 16:52:07,721 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-14 16:52:07,722 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 205 transitions, 1291 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:07,722 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:52:07,722 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-14 16:52:07,722 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:52:09,831 INFO L129 PetriNetUnfolder]: 224/807 cut-off events. [2021-12-14 16:52:09,832 INFO L130 PetriNetUnfolder]: For 1127/1127 co-relation queries the response was YES. [2021-12-14 16:52:09,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2555 conditions, 807 events. 224/807 cut-off events. For 1127/1127 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5014 event pairs, 18 based on Foata normal form. 1/799 useless extension candidates. Maximal degree in co-relation 2524. Up to 131 conditions per place. [2021-12-14 16:52:09,838 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 121 selfloop transitions, 159 changer transitions 6/328 dead transitions. [2021-12-14 16:52:09,838 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 328 transitions, 2549 flow [2021-12-14 16:52:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-14 16:52:09,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-12-14 16:52:09,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3081 transitions. [2021-12-14 16:52:09,843 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.629417773237998 [2021-12-14 16:52:09,843 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3081 transitions. [2021-12-14 16:52:09,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3081 transitions. [2021-12-14 16:52:09,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:52:09,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3081 transitions. [2021-12-14 16:52:09,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 56.018181818181816) internal successors, (3081), 55 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:09,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 89.0) internal successors, (4984), 56 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:09,853 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 89.0) internal successors, (4984), 56 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:09,853 INFO L186 Difference]: Start difference. First operand has 186 places, 205 transitions, 1291 flow. Second operand 55 states and 3081 transitions. [2021-12-14 16:52:09,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 328 transitions, 2549 flow [2021-12-14 16:52:09,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 328 transitions, 2502 flow, removed 17 selfloop flow, removed 8 redundant places. [2021-12-14 16:52:09,863 INFO L242 Difference]: Finished difference. Result has 238 places, 244 transitions, 1968 flow [2021-12-14 16:52:09,864 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=1968, PETRI_PLACES=238, PETRI_TRANSITIONS=244} [2021-12-14 16:52:09,864 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 159 predicate places. [2021-12-14 16:52:09,864 INFO L470 AbstractCegarLoop]: Abstraction has has 238 places, 244 transitions, 1968 flow [2021-12-14 16:52:09,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:09,865 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:52:09,865 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] [2021-12-14 16:52:09,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 16:52:10,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:10,085 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:52:10,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:52:10,086 INFO L85 PathProgramCache]: Analyzing trace with hash 569216823, now seen corresponding path program 4 times [2021-12-14 16:52:10,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:52:10,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496133229] [2021-12-14 16:52:10,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:52:10,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:52:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:52:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:10,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:52:10,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496133229] [2021-12-14 16:52:10,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496133229] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:52:10,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831756543] [2021-12-14 16:52:10,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 16:52:10,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:10,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:52:10,270 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) [2021-12-14 16:52:10,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 16:52:10,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 16:52:10,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:52:10,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 16:52:10,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:52:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:10,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:52:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:11,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831756543] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:52:11,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:52:11,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-14 16:52:11,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930475653] [2021-12-14 16:52:11,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:52:11,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-14 16:52:11,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:52:11,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-14 16:52:11,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2021-12-14 16:52:11,310 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-14 16:52:11,311 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 244 transitions, 1968 flow. Second operand has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 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) [2021-12-14 16:52:11,312 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:52:11,312 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-14 16:52:11,312 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:52:15,810 INFO L129 PetriNetUnfolder]: 465/1601 cut-off events. [2021-12-14 16:52:15,810 INFO L130 PetriNetUnfolder]: For 5294/5296 co-relation queries the response was YES. [2021-12-14 16:52:15,816 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6039 conditions, 1601 events. 465/1601 cut-off events. For 5294/5296 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12239 event pairs, 4 based on Foata normal form. 5/1595 useless extension candidates. Maximal degree in co-relation 6001. Up to 185 conditions per place. [2021-12-14 16:52:15,822 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 225 selfloop transitions, 367 changer transitions 15/649 dead transitions. [2021-12-14 16:52:15,823 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 649 transitions, 6277 flow [2021-12-14 16:52:15,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-12-14 16:52:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-12-14 16:52:15,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 6273 transitions. [2021-12-14 16:52:15,828 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6293138041733547 [2021-12-14 16:52:15,828 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 6273 transitions. [2021-12-14 16:52:15,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 6273 transitions. [2021-12-14 16:52:15,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:52:15,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 6273 transitions. [2021-12-14 16:52:15,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 113 states, 112 states have (on average 56.00892857142857) internal successors, (6273), 112 states have internal predecessors, (6273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:15,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 113 states, 113 states have (on average 89.0) internal successors, (10057), 113 states have internal predecessors, (10057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:15,854 INFO L81 ComplementDD]: Finished complementDD. Result has 113 states, 113 states have (on average 89.0) internal successors, (10057), 113 states have internal predecessors, (10057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:15,854 INFO L186 Difference]: Start difference. First operand has 238 places, 244 transitions, 1968 flow. Second operand 112 states and 6273 transitions. [2021-12-14 16:52:15,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 649 transitions, 6277 flow [2021-12-14 16:52:15,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 649 transitions, 5939 flow, removed 45 selfloop flow, removed 19 redundant places. [2021-12-14 16:52:15,881 INFO L242 Difference]: Finished difference. Result has 352 places, 467 transitions, 4535 flow [2021-12-14 16:52:15,882 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1765, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=4535, PETRI_PLACES=352, PETRI_TRANSITIONS=467} [2021-12-14 16:52:15,882 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 273 predicate places. [2021-12-14 16:52:15,882 INFO L470 AbstractCegarLoop]: Abstraction has has 352 places, 467 transitions, 4535 flow [2021-12-14 16:52:15,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 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) [2021-12-14 16:52:15,883 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:52:15,883 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] [2021-12-14 16:52:15,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 16:52:16,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:16,091 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:52:16,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:52:16,092 INFO L85 PathProgramCache]: Analyzing trace with hash 688614497, now seen corresponding path program 5 times [2021-12-14 16:52:16,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:52:16,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601838889] [2021-12-14 16:52:16,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:52:16,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:52:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:52:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:16,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:52:16,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601838889] [2021-12-14 16:52:16,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601838889] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:52:16,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065773457] [2021-12-14 16:52:16,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 16:52:16,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:16,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:52:16,293 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) [2021-12-14 16:52:16,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 16:52:16,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 16:52:16,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:52:16,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 16:52:16,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:52:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:16,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:52:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:17,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065773457] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:52:17,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:52:17,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-14 16:52:17,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530508279] [2021-12-14 16:52:17,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:52:17,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-14 16:52:17,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:52:17,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-14 16:52:17,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2021-12-14 16:52:17,350 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-14 16:52:17,351 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 467 transitions, 4535 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:17,351 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:52:17,351 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-14 16:52:17,351 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:52:18,190 INFO L129 PetriNetUnfolder]: 463/1600 cut-off events. [2021-12-14 16:52:18,190 INFO L130 PetriNetUnfolder]: For 10506/10506 co-relation queries the response was YES. [2021-12-14 16:52:18,198 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7417 conditions, 1600 events. 463/1600 cut-off events. For 10506/10506 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12200 event pairs, 39 based on Foata normal form. 1/1593 useless extension candidates. Maximal degree in co-relation 7353. Up to 576 conditions per place. [2021-12-14 16:52:18,205 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 187 selfloop transitions, 279 changer transitions 6/514 dead transitions. [2021-12-14 16:52:18,205 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 514 transitions, 5959 flow [2021-12-14 16:52:18,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-14 16:52:18,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-14 16:52:18,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1452 transitions. [2021-12-14 16:52:18,207 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6274848746758859 [2021-12-14 16:52:18,207 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1452 transitions. [2021-12-14 16:52:18,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1452 transitions. [2021-12-14 16:52:18,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:52:18,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1452 transitions. [2021-12-14 16:52:18,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.84615384615385) internal successors, (1452), 26 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:18,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 89.0) internal successors, (2403), 27 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:18,211 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 89.0) internal successors, (2403), 27 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:18,211 INFO L186 Difference]: Start difference. First operand has 352 places, 467 transitions, 4535 flow. Second operand 26 states and 1452 transitions. [2021-12-14 16:52:18,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 514 transitions, 5959 flow [2021-12-14 16:52:18,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 514 transitions, 5401 flow, removed 167 selfloop flow, removed 26 redundant places. [2021-12-14 16:52:18,259 INFO L242 Difference]: Finished difference. Result has 350 places, 477 transitions, 4958 flow [2021-12-14 16:52:18,259 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=4048, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4958, PETRI_PLACES=350, PETRI_TRANSITIONS=477} [2021-12-14 16:52:18,260 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 271 predicate places. [2021-12-14 16:52:18,260 INFO L470 AbstractCegarLoop]: Abstraction has has 350 places, 477 transitions, 4958 flow [2021-12-14 16:52:18,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:18,260 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:52:18,261 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] [2021-12-14 16:52:18,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 16:52:18,469 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,SelfDestructingSolverStorable11 [2021-12-14 16:52:18,470 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:52:18,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:52:18,470 INFO L85 PathProgramCache]: Analyzing trace with hash -2045613305, now seen corresponding path program 6 times [2021-12-14 16:52:18,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:52:18,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36484501] [2021-12-14 16:52:18,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:52:18,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:52:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:52:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:18,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:52:18,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36484501] [2021-12-14 16:52:18,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36484501] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:52:18,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533261510] [2021-12-14 16:52:18,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 16:52:18,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:18,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:52:18,691 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) [2021-12-14 16:52:18,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 16:52:18,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-14 16:52:18,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:52:18,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 16:52:18,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:52:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:19,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:52:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:19,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533261510] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:52:19,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:52:19,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-14 16:52:19,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387442011] [2021-12-14 16:52:19,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:52:19,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-14 16:52:19,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:52:19,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-14 16:52:19,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-12-14 16:52:19,713 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-14 16:52:19,714 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 477 transitions, 4958 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:19,714 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:52:19,714 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-14 16:52:19,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:52:21,172 INFO L129 PetriNetUnfolder]: 585/1949 cut-off events. [2021-12-14 16:52:21,172 INFO L130 PetriNetUnfolder]: For 12603/12603 co-relation queries the response was YES. [2021-12-14 16:52:21,180 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9014 conditions, 1949 events. 585/1949 cut-off events. For 12603/12603 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 15548 event pairs, 31 based on Foata normal form. 1/1936 useless extension candidates. Maximal degree in co-relation 8952. Up to 566 conditions per place. [2021-12-14 16:52:21,188 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 256 selfloop transitions, 348 changer transitions 6/652 dead transitions. [2021-12-14 16:52:21,188 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 652 transitions, 7771 flow [2021-12-14 16:52:21,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-14 16:52:21,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-14 16:52:21,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2185 transitions. [2021-12-14 16:52:21,190 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6295015845577643 [2021-12-14 16:52:21,190 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2185 transitions. [2021-12-14 16:52:21,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2185 transitions. [2021-12-14 16:52:21,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:52:21,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2185 transitions. [2021-12-14 16:52:21,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.02564102564103) internal successors, (2185), 39 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:21,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:21,197 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 89.0) internal successors, (3560), 40 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:21,197 INFO L186 Difference]: Start difference. First operand has 350 places, 477 transitions, 4958 flow. Second operand 39 states and 2185 transitions. [2021-12-14 16:52:21,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 652 transitions, 7771 flow [2021-12-14 16:52:21,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 652 transitions, 7483 flow, removed 9 selfloop flow, removed 17 redundant places. [2021-12-14 16:52:21,259 INFO L242 Difference]: Finished difference. Result has 380 places, 561 transitions, 6838 flow [2021-12-14 16:52:21,260 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=4705, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=6838, PETRI_PLACES=380, PETRI_TRANSITIONS=561} [2021-12-14 16:52:21,260 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 301 predicate places. [2021-12-14 16:52:21,260 INFO L470 AbstractCegarLoop]: Abstraction has has 380 places, 561 transitions, 6838 flow [2021-12-14 16:52:21,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:21,261 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:52:21,261 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] [2021-12-14 16:52:21,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 16:52:21,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:21,480 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:52:21,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:52:21,480 INFO L85 PathProgramCache]: Analyzing trace with hash -247596831, now seen corresponding path program 7 times [2021-12-14 16:52:21,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:52:21,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287305996] [2021-12-14 16:52:21,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:52:21,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:52:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:52:21,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:21,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:52:21,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287305996] [2021-12-14 16:52:21,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287305996] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:52:21,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478017569] [2021-12-14 16:52:21,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 16:52:21,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:21,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:52:21,740 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) [2021-12-14 16:52:21,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 16:52:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:52:21,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 16:52:21,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:52:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:22,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:52:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:22,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478017569] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:52:22,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:52:22,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2021-12-14 16:52:22,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115147602] [2021-12-14 16:52:22,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:52:22,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-14 16:52:22,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:52:22,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-14 16:52:22,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2021-12-14 16:52:22,664 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-14 16:52:22,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 561 transitions, 6838 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:22,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:52:22,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-14 16:52:22,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:52:25,102 INFO L129 PetriNetUnfolder]: 671/2175 cut-off events. [2021-12-14 16:52:25,103 INFO L130 PetriNetUnfolder]: For 18651/18651 co-relation queries the response was YES. [2021-12-14 16:52:25,115 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11245 conditions, 2175 events. 671/2175 cut-off events. For 18651/18651 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17760 event pairs, 27 based on Foata normal form. 1/2160 useless extension candidates. Maximal degree in co-relation 11174. Up to 581 conditions per place. [2021-12-14 16:52:25,126 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 211 selfloop transitions, 512 changer transitions 6/771 dead transitions. [2021-12-14 16:52:25,126 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 771 transitions, 10453 flow [2021-12-14 16:52:25,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-14 16:52:25,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-12-14 16:52:25,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3334 transitions. [2021-12-14 16:52:25,129 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6243445692883896 [2021-12-14 16:52:25,129 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3334 transitions. [2021-12-14 16:52:25,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3334 transitions. [2021-12-14 16:52:25,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:52:25,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3334 transitions. [2021-12-14 16:52:25,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 55.56666666666667) internal successors, (3334), 60 states have internal predecessors, (3334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:25,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 89.0) internal successors, (5429), 61 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:25,192 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 89.0) internal successors, (5429), 61 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:25,192 INFO L186 Difference]: Start difference. First operand has 380 places, 561 transitions, 6838 flow. Second operand 60 states and 3334 transitions. [2021-12-14 16:52:25,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 771 transitions, 10453 flow [2021-12-14 16:52:25,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 771 transitions, 10290 flow, removed 48 selfloop flow, removed 15 redundant places. [2021-12-14 16:52:25,299 INFO L242 Difference]: Finished difference. Result has 434 places, 696 transitions, 9993 flow [2021-12-14 16:52:25,299 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=6703, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=9993, PETRI_PLACES=434, PETRI_TRANSITIONS=696} [2021-12-14 16:52:25,300 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 355 predicate places. [2021-12-14 16:52:25,300 INFO L470 AbstractCegarLoop]: Abstraction has has 434 places, 696 transitions, 9993 flow [2021-12-14 16:52:25,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:25,301 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:52:25,301 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] [2021-12-14 16:52:25,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 16:52:25,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:25,502 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:52:25,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:52:25,503 INFO L85 PathProgramCache]: Analyzing trace with hash 479406539, now seen corresponding path program 8 times [2021-12-14 16:52:25,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:52:25,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539476413] [2021-12-14 16:52:25,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:52:25,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:52:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:52:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:25,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:52:25,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539476413] [2021-12-14 16:52:25,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539476413] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:52:25,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612840250] [2021-12-14 16:52:25,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 16:52:25,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:25,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:52:25,714 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) [2021-12-14 16:52:25,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 16:52:25,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 16:52:25,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:52:25,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 16:52:25,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:52:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:26,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:52:26,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:26,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612840250] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:52:26,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:52:26,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-14 16:52:26,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585477282] [2021-12-14 16:52:26,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:52:26,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-14 16:52:26,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:52:26,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-14 16:52:26,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-12-14 16:52:26,618 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-14 16:52:26,619 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 696 transitions, 9993 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:26,619 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:52:26,619 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-14 16:52:26,619 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:52:30,474 INFO L129 PetriNetUnfolder]: 778/2548 cut-off events. [2021-12-14 16:52:30,474 INFO L130 PetriNetUnfolder]: For 27736/27736 co-relation queries the response was YES. [2021-12-14 16:52:30,489 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14596 conditions, 2548 events. 778/2548 cut-off events. For 27736/27736 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 21976 event pairs, 29 based on Foata normal form. 1/2531 useless extension candidates. Maximal degree in co-relation 14516. Up to 564 conditions per place. [2021-12-14 16:52:30,502 INFO L132 encePairwiseOnDemand]: 68/89 looper letters, 214 selfloop transitions, 610 changer transitions 6/872 dead transitions. [2021-12-14 16:52:30,502 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 872 transitions, 13695 flow [2021-12-14 16:52:30,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-14 16:52:30,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-12-14 16:52:30,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 4761 transitions. [2021-12-14 16:52:30,507 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6220276979357199 [2021-12-14 16:52:30,508 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 4761 transitions. [2021-12-14 16:52:30,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 4761 transitions. [2021-12-14 16:52:30,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:52:30,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 4761 transitions. [2021-12-14 16:52:30,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 55.36046511627907) internal successors, (4761), 86 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:30,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 89.0) internal successors, (7743), 87 states have internal predecessors, (7743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:30,520 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 89.0) internal successors, (7743), 87 states have internal predecessors, (7743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:30,520 INFO L186 Difference]: Start difference. First operand has 434 places, 696 transitions, 9993 flow. Second operand 86 states and 4761 transitions. [2021-12-14 16:52:30,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 872 transitions, 13695 flow [2021-12-14 16:52:30,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 872 transitions, 13295 flow, removed 94 selfloop flow, removed 26 redundant places. [2021-12-14 16:52:30,692 INFO L242 Difference]: Finished difference. Result has 498 places, 787 transitions, 12459 flow [2021-12-14 16:52:30,692 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=9649, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=527, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=12459, PETRI_PLACES=498, PETRI_TRANSITIONS=787} [2021-12-14 16:52:30,693 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 419 predicate places. [2021-12-14 16:52:30,693 INFO L470 AbstractCegarLoop]: Abstraction has has 498 places, 787 transitions, 12459 flow [2021-12-14 16:52:30,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:30,693 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:52:30,693 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] [2021-12-14 16:52:30,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 16:52:30,894 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,SelfDestructingSolverStorable14 [2021-12-14 16:52:30,894 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:52:30,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:52:30,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1836891633, now seen corresponding path program 9 times [2021-12-14 16:52:30,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:52:30,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426927425] [2021-12-14 16:52:30,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:52:30,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:52:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:52:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:31,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:52:31,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426927425] [2021-12-14 16:52:31,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426927425] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:52:31,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408216245] [2021-12-14 16:52:31,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 16:52:31,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:31,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:52:31,056 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) [2021-12-14 16:52:31,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 16:52:31,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-14 16:52:31,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:52:31,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 16:52:31,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:52:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:31,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:52:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:32,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408216245] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:52:32,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:52:32,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-14 16:52:32,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960625583] [2021-12-14 16:52:32,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:52:32,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-14 16:52:32,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:52:32,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-14 16:52:32,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 16:52:32,037 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-14 16:52:32,038 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 787 transitions, 12459 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:32,038 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:52:32,038 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-14 16:52:32,039 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:52:33,506 INFO L129 PetriNetUnfolder]: 787/2775 cut-off events. [2021-12-14 16:52:33,506 INFO L130 PetriNetUnfolder]: For 33280/33280 co-relation queries the response was YES. [2021-12-14 16:52:33,523 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16249 conditions, 2775 events. 787/2775 cut-off events. For 33280/33280 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 25094 event pairs, 53 based on Foata normal form. 1/2759 useless extension candidates. Maximal degree in co-relation 16163. Up to 1037 conditions per place. [2021-12-14 16:52:33,534 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 324 selfloop transitions, 462 changer transitions 6/834 dead transitions. [2021-12-14 16:52:33,534 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 834 transitions, 14549 flow [2021-12-14 16:52:33,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-14 16:52:33,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-14 16:52:33,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1783 transitions. [2021-12-14 16:52:33,540 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6260533707865169 [2021-12-14 16:52:33,541 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1783 transitions. [2021-12-14 16:52:33,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1783 transitions. [2021-12-14 16:52:33,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:52:33,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1783 transitions. [2021-12-14 16:52:33,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.71875) internal successors, (1783), 32 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:33,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:33,578 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:33,578 INFO L186 Difference]: Start difference. First operand has 498 places, 787 transitions, 12459 flow. Second operand 32 states and 1783 transitions. [2021-12-14 16:52:33,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 834 transitions, 14549 flow [2021-12-14 16:52:33,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 834 transitions, 13812 flow, removed 118 selfloop flow, removed 54 redundant places. [2021-12-14 16:52:33,808 INFO L242 Difference]: Finished difference. Result has 480 places, 800 transitions, 13327 flow [2021-12-14 16:52:33,809 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=11736, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=449, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=13327, PETRI_PLACES=480, PETRI_TRANSITIONS=800} [2021-12-14 16:52:33,809 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 401 predicate places. [2021-12-14 16:52:33,809 INFO L470 AbstractCegarLoop]: Abstraction has has 480 places, 800 transitions, 13327 flow [2021-12-14 16:52:33,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:33,810 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:52:33,810 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] [2021-12-14 16:52:33,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 16:52:34,023 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,SelfDestructingSolverStorable15 [2021-12-14 16:52:34,023 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:52:34,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:52:34,024 INFO L85 PathProgramCache]: Analyzing trace with hash 315383393, now seen corresponding path program 10 times [2021-12-14 16:52:34,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:52:34,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69907138] [2021-12-14 16:52:34,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:52:34,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:52:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:52:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:34,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:52:34,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69907138] [2021-12-14 16:52:34,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69907138] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:52:34,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425195433] [2021-12-14 16:52:34,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 16:52:34,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:34,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:52:34,187 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) [2021-12-14 16:52:34,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 16:52:34,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 16:52:34,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:52:34,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 16:52:34,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:52:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:34,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:52:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:35,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425195433] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:52:35,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:52:35,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-14 16:52:35,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65695340] [2021-12-14 16:52:35,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:52:35,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-14 16:52:35,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:52:35,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-14 16:52:35,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 16:52:35,299 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-14 16:52:35,300 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 800 transitions, 13327 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:35,300 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:52:35,300 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-14 16:52:35,300 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:52:36,533 INFO L129 PetriNetUnfolder]: 787/2756 cut-off events. [2021-12-14 16:52:36,533 INFO L130 PetriNetUnfolder]: For 31701/31701 co-relation queries the response was YES. [2021-12-14 16:52:36,549 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16515 conditions, 2756 events. 787/2756 cut-off events. For 31701/31701 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 24862 event pairs, 89 based on Foata normal form. 1/2738 useless extension candidates. Maximal degree in co-relation 16429. Up to 1051 conditions per place. [2021-12-14 16:52:36,560 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 354 selfloop transitions, 429 changer transitions 6/831 dead transitions. [2021-12-14 16:52:36,560 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 831 transitions, 15273 flow [2021-12-14 16:52:36,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-14 16:52:36,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-14 16:52:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1503 transitions. [2021-12-14 16:52:36,562 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6254681647940075 [2021-12-14 16:52:36,562 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1503 transitions. [2021-12-14 16:52:36,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1503 transitions. [2021-12-14 16:52:36,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:52:36,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1503 transitions. [2021-12-14 16:52:36,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.666666666666664) internal successors, (1503), 27 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:36,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 89.0) internal successors, (2492), 28 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:36,566 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 89.0) internal successors, (2492), 28 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:36,566 INFO L186 Difference]: Start difference. First operand has 480 places, 800 transitions, 13327 flow. Second operand 27 states and 1503 transitions. [2021-12-14 16:52:36,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 831 transitions, 15273 flow [2021-12-14 16:52:36,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 831 transitions, 14993 flow, removed 22 selfloop flow, removed 21 redundant places. [2021-12-14 16:52:36,778 INFO L242 Difference]: Finished difference. Result has 489 places, 805 transitions, 14380 flow [2021-12-14 16:52:36,779 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=13051, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=14380, PETRI_PLACES=489, PETRI_TRANSITIONS=805} [2021-12-14 16:52:36,779 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 410 predicate places. [2021-12-14 16:52:36,779 INFO L470 AbstractCegarLoop]: Abstraction has has 489 places, 805 transitions, 14380 flow [2021-12-14 16:52:36,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:36,780 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:52:36,780 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] [2021-12-14 16:52:36,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 16:52:36,988 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,SelfDestructingSolverStorable16 [2021-12-14 16:52:36,988 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:52:36,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:52:36,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1863812427, now seen corresponding path program 11 times [2021-12-14 16:52:36,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:52:36,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809120497] [2021-12-14 16:52:36,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:52:36,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:52:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:52:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:37,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:52:37,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809120497] [2021-12-14 16:52:37,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809120497] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:52:37,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083161356] [2021-12-14 16:52:37,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 16:52:37,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:37,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:52:37,175 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) [2021-12-14 16:52:37,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 16:52:37,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 16:52:37,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:52:37,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 16:52:37,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:52:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:37,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:52:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:38,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083161356] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:52:38,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:52:38,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-14 16:52:38,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643074484] [2021-12-14 16:52:38,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:52:38,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-14 16:52:38,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:52:38,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-14 16:52:38,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 16:52:38,279 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-14 16:52:38,280 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 805 transitions, 14380 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:38,280 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:52:38,280 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-14 16:52:38,280 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:52:40,490 INFO L129 PetriNetUnfolder]: 843/3028 cut-off events. [2021-12-14 16:52:40,490 INFO L130 PetriNetUnfolder]: For 39026/39026 co-relation queries the response was YES. [2021-12-14 16:52:40,508 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18747 conditions, 3028 events. 843/3028 cut-off events. For 39026/39026 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 28185 event pairs, 39 based on Foata normal form. 1/3026 useless extension candidates. Maximal degree in co-relation 18657. Up to 811 conditions per place. [2021-12-14 16:52:40,521 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 366 selfloop transitions, 529 changer transitions 6/943 dead transitions. [2021-12-14 16:52:40,521 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 943 transitions, 18081 flow [2021-12-14 16:52:40,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-14 16:52:40,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-12-14 16:52:40,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2518 transitions. [2021-12-14 16:52:40,523 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6287141073657928 [2021-12-14 16:52:40,523 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2518 transitions. [2021-12-14 16:52:40,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2518 transitions. [2021-12-14 16:52:40,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:52:40,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2518 transitions. [2021-12-14 16:52:40,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 55.955555555555556) internal successors, (2518), 45 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:40,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 89.0) internal successors, (4094), 46 states have internal predecessors, (4094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:40,529 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 89.0) internal successors, (4094), 46 states have internal predecessors, (4094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:40,529 INFO L186 Difference]: Start difference. First operand has 489 places, 805 transitions, 14380 flow. Second operand 45 states and 2518 transitions. [2021-12-14 16:52:40,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 943 transitions, 18081 flow [2021-12-14 16:52:40,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 943 transitions, 17664 flow, removed 10 selfloop flow, removed 20 redundant places. [2021-12-14 16:52:40,763 INFO L242 Difference]: Finished difference. Result has 518 places, 858 transitions, 16521 flow [2021-12-14 16:52:40,764 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=13996, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=476, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=16521, PETRI_PLACES=518, PETRI_TRANSITIONS=858} [2021-12-14 16:52:40,764 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 439 predicate places. [2021-12-14 16:52:40,764 INFO L470 AbstractCegarLoop]: Abstraction has has 518 places, 858 transitions, 16521 flow [2021-12-14 16:52:40,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:40,765 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:52:40,765 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] [2021-12-14 16:52:40,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 16:52:40,979 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,SelfDestructingSolverStorable17 [2021-12-14 16:52:40,979 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:52:40,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:52:40,980 INFO L85 PathProgramCache]: Analyzing trace with hash -372093605, now seen corresponding path program 12 times [2021-12-14 16:52:40,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:52:40,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520938470] [2021-12-14 16:52:40,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:52:40,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:52:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:52:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:41,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:52:41,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520938470] [2021-12-14 16:52:41,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520938470] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:52:41,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267542564] [2021-12-14 16:52:41,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 16:52:41,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:41,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:52:41,175 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) [2021-12-14 16:52:41,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 16:52:41,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-14 16:52:41,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:52:41,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 16:52:41,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:52:41,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:41,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:52:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:42,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267542564] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:52:42,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:52:42,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-14 16:52:42,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501299339] [2021-12-14 16:52:42,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:52:42,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-14 16:52:42,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:52:42,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-14 16:52:42,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 16:52:42,259 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-14 16:52:42,260 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 858 transitions, 16521 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:42,260 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:52:42,260 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-14 16:52:42,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:52:45,513 INFO L129 PetriNetUnfolder]: 912/3306 cut-off events. [2021-12-14 16:52:45,513 INFO L130 PetriNetUnfolder]: For 50461/50461 co-relation queries the response was YES. [2021-12-14 16:52:45,540 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21361 conditions, 3306 events. 912/3306 cut-off events. For 50461/50461 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 31547 event pairs, 38 based on Foata normal form. 1/3304 useless extension candidates. Maximal degree in co-relation 21266. Up to 793 conditions per place. [2021-12-14 16:52:45,553 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 272 selfloop transitions, 700 changer transitions 6/1020 dead transitions. [2021-12-14 16:52:45,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 1020 transitions, 20608 flow [2021-12-14 16:52:45,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-14 16:52:45,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-12-14 16:52:45,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3666 transitions. [2021-12-14 16:52:45,556 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6241062308478039 [2021-12-14 16:52:45,556 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 3666 transitions. [2021-12-14 16:52:45,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 3666 transitions. [2021-12-14 16:52:45,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:52:45,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 3666 transitions. [2021-12-14 16:52:45,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 55.54545454545455) internal successors, (3666), 66 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:45,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 89.0) internal successors, (5963), 67 states have internal predecessors, (5963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:45,642 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 89.0) internal successors, (5963), 67 states have internal predecessors, (5963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:45,642 INFO L186 Difference]: Start difference. First operand has 518 places, 858 transitions, 16521 flow. Second operand 66 states and 3666 transitions. [2021-12-14 16:52:45,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 1020 transitions, 20608 flow [2021-12-14 16:52:45,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 1020 transitions, 20343 flow, removed 45 selfloop flow, removed 23 redundant places. [2021-12-14 16:52:45,979 INFO L242 Difference]: Finished difference. Result has 569 places, 935 transitions, 19771 flow [2021-12-14 16:52:45,980 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=16291, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=626, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=19771, PETRI_PLACES=569, PETRI_TRANSITIONS=935} [2021-12-14 16:52:45,981 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 490 predicate places. [2021-12-14 16:52:45,981 INFO L470 AbstractCegarLoop]: Abstraction has has 569 places, 935 transitions, 19771 flow [2021-12-14 16:52:45,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:45,981 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:52:45,981 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] [2021-12-14 16:52:45,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-14 16:52:46,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:46,183 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:52:46,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:52:46,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1472842621, now seen corresponding path program 13 times [2021-12-14 16:52:46,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:52:46,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602718659] [2021-12-14 16:52:46,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:52:46,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:52:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:52:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:46,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:52:46,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602718659] [2021-12-14 16:52:46,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602718659] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:52:46,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132583460] [2021-12-14 16:52:46,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 16:52:46,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:46,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:52:46,367 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) [2021-12-14 16:52:46,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 16:52:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:52:46,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 16:52:46,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:52:46,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:46,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:52:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:47,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132583460] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:52:47,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:52:47,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-14 16:52:47,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804596116] [2021-12-14 16:52:47,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:52:47,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-14 16:52:47,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:52:47,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-14 16:52:47,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 16:52:47,368 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-14 16:52:47,369 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 935 transitions, 19771 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:47,369 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:52:47,369 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-14 16:52:47,369 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:52:52,098 INFO L129 PetriNetUnfolder]: 1027/3774 cut-off events. [2021-12-14 16:52:52,098 INFO L130 PetriNetUnfolder]: For 68863/68863 co-relation queries the response was YES. [2021-12-14 16:52:52,128 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26190 conditions, 3774 events. 1027/3774 cut-off events. For 68863/68863 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 37584 event pairs, 38 based on Foata normal form. 2/3773 useless extension candidates. Maximal degree in co-relation 26086. Up to 730 conditions per place. [2021-12-14 16:52:52,142 INFO L132 encePairwiseOnDemand]: 67/89 looper letters, 270 selfloop transitions, 844 changer transitions 12/1168 dead transitions. [2021-12-14 16:52:52,142 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 656 places, 1168 transitions, 25976 flow [2021-12-14 16:52:52,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-14 16:52:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-12-14 16:52:52,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 5051 transitions. [2021-12-14 16:52:52,145 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6236572416347698 [2021-12-14 16:52:52,145 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 5051 transitions. [2021-12-14 16:52:52,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 5051 transitions. [2021-12-14 16:52:52,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:52:52,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 5051 transitions. [2021-12-14 16:52:52,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 55.505494505494504) internal successors, (5051), 91 states have internal predecessors, (5051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:52,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 89.0) internal successors, (8188), 92 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:52,157 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 89.0) internal successors, (8188), 92 states have internal predecessors, (8188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:52,157 INFO L186 Difference]: Start difference. First operand has 569 places, 935 transitions, 19771 flow. Second operand 91 states and 5051 transitions. [2021-12-14 16:52:52,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 656 places, 1168 transitions, 25976 flow [2021-12-14 16:52:52,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 623 places, 1168 transitions, 25639 flow, removed 50 selfloop flow, removed 33 redundant places. [2021-12-14 16:52:52,590 INFO L242 Difference]: Finished difference. Result has 637 places, 1058 transitions, 24584 flow [2021-12-14 16:52:52,591 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=19433, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=934, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=727, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=24584, PETRI_PLACES=637, PETRI_TRANSITIONS=1058} [2021-12-14 16:52:52,592 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 558 predicate places. [2021-12-14 16:52:52,592 INFO L470 AbstractCegarLoop]: Abstraction has has 637 places, 1058 transitions, 24584 flow [2021-12-14 16:52:52,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:52,592 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:52:52,592 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] [2021-12-14 16:52:52,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-14 16:52:52,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-12-14 16:52:52,797 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:52:52,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:52:52,797 INFO L85 PathProgramCache]: Analyzing trace with hash 930466101, now seen corresponding path program 14 times [2021-12-14 16:52:52,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:52:52,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946564225] [2021-12-14 16:52:52,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:52:52,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:52:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:52:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:52,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:52:52,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946564225] [2021-12-14 16:52:52,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946564225] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:52:52,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016096345] [2021-12-14 16:52:52,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 16:52:52,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:52,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:52:52,956 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:52:52,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-14 16:52:53,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 16:52:53,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:52:53,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 16:52:53,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:52:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:53,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:52:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:53,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016096345] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:52:53,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:52:53,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-14 16:52:53,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616774034] [2021-12-14 16:52:53,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:52:53,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-14 16:52:53,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:52:53,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-14 16:52:53,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 16:52:53,903 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-14 16:52:53,904 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 637 places, 1058 transitions, 24584 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:53,904 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:52:53,904 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-14 16:52:53,904 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:52:55,818 INFO L129 PetriNetUnfolder]: 1027/3792 cut-off events. [2021-12-14 16:52:55,818 INFO L130 PetriNetUnfolder]: For 92137/92137 co-relation queries the response was YES. [2021-12-14 16:52:55,850 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28860 conditions, 3792 events. 1027/3792 cut-off events. For 92137/92137 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 37861 event pairs, 121 based on Foata normal form. 2/3773 useless extension candidates. Maximal degree in co-relation 28746. Up to 1315 conditions per place. [2021-12-14 16:52:55,868 INFO L132 encePairwiseOnDemand]: 69/89 looper letters, 443 selfloop transitions, 606 changer transitions 12/1103 dead transitions. [2021-12-14 16:52:55,868 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 1103 transitions, 27273 flow [2021-12-14 16:52:55,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-14 16:52:55,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-14 16:52:55,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1820 transitions. [2021-12-14 16:52:55,869 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6196799455226422 [2021-12-14 16:52:55,870 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1820 transitions. [2021-12-14 16:52:55,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1820 transitions. [2021-12-14 16:52:55,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:52:55,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1820 transitions. [2021-12-14 16:52:55,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.15151515151515) internal successors, (1820), 33 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:55,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:55,873 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:55,874 INFO L186 Difference]: Start difference. First operand has 637 places, 1058 transitions, 24584 flow. Second operand 33 states and 1820 transitions. [2021-12-14 16:52:55,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 1103 transitions, 27273 flow [2021-12-14 16:52:56,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 616 places, 1103 transitions, 26778 flow, removed 109 selfloop flow, removed 45 redundant places. [2021-12-14 16:52:56,443 INFO L242 Difference]: Finished difference. Result has 629 places, 1071 transitions, 26015 flow [2021-12-14 16:52:56,444 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=24105, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1058, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=593, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=26015, PETRI_PLACES=629, PETRI_TRANSITIONS=1071} [2021-12-14 16:52:56,445 INFO L334 CegarLoopForPetriNet]: 79 programPoint places, 550 predicate places. [2021-12-14 16:52:56,445 INFO L470 AbstractCegarLoop]: Abstraction has has 629 places, 1071 transitions, 26015 flow [2021-12-14 16:52:56,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:56,445 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:52:56,445 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] [2021-12-14 16:52:56,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-14 16:52:56,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:56,659 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:52:56,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:52:56,660 INFO L85 PathProgramCache]: Analyzing trace with hash -486059931, now seen corresponding path program 15 times [2021-12-14 16:52:56,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:52:56,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398678892] [2021-12-14 16:52:56,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:52:56,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:52:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:52:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:56,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:52:56,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398678892] [2021-12-14 16:52:56,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398678892] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:52:56,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632685736] [2021-12-14 16:52:56,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 16:52:56,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:52:56,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:52:56,874 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:52:56,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-14 16:52:56,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-14 16:52:56,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:52:56,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 16:52:56,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:52:57,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:57,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:52:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:52:57,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632685736] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:52:57,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:52:57,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-14 16:52:57,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760637534] [2021-12-14 16:52:57,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:52:57,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-14 16:52:57,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:52:57,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-14 16:52:57,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 16:52:57,885 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2021-12-14 16:52:57,886 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 629 places, 1071 transitions, 26015 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:52:57,886 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:52:57,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2021-12-14 16:52:57,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand