./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-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-nonblocking-cntr-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 dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:54:22,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:54:22,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:54:22,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:54:22,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:54:22,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:54:22,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:54:22,947 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:54:22,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:54:22,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:54:22,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:54:22,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:54:22,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:54:22,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:54:22,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:54:22,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:54:22,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:54:22,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:54:22,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:54:22,965 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:54:22,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:54:22,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:54:22,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:54:22,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:54:22,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:54:22,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:54:22,973 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:54:22,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:54:22,974 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:54:22,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:54:22,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:54:22,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:54:22,977 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:54:22,978 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:54:22,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:54:22,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:54:22,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:54:22,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:54:22,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:54:22,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:54:22,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:54:22,981 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:54:23,004 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:54:23,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:54:23,004 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:54:23,005 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:54:23,005 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:54:23,005 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:54:23,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:54:23,006 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:54:23,006 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:54:23,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:54:23,007 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:54:23,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:54:23,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:54:23,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:54:23,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:54:23,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:54:23,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:54:23,008 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:54:23,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:54:23,008 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:54:23,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:54:23,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:54:23,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:54:23,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:54:23,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:54:23,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:54:23,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:54:23,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:54:23,010 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:54:23,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:54:23,010 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:54:23,010 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:54:23,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:54:23,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:54:23,011 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f [2021-12-14 16:54:23,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:54:23,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:54:23,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:54:23,224 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:54:23,224 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:54:23,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2021-12-14 16:54:23,273 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/352e692e7/17d97925cfa447909706dff330ca779c/FLAGfe6aba6da [2021-12-14 16:54:23,567 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:54:23,568 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2021-12-14 16:54:23,572 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/352e692e7/17d97925cfa447909706dff330ca779c/FLAGfe6aba6da [2021-12-14 16:54:24,001 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/352e692e7/17d97925cfa447909706dff330ca779c [2021-12-14 16:54:24,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:54:24,005 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:54:24,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:54:24,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:54:24,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:54:24,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:54:24" (1/1) ... [2021-12-14 16:54:24,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@568e3ee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:24, skipping insertion in model container [2021-12-14 16:54:24,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:54:24" (1/1) ... [2021-12-14 16:54:24,020 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:54:24,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:54:24,161 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-nonblocking-cntr-alt.wvr.c[2098,2111] [2021-12-14 16:54:24,173 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:54:24,178 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:54:24,204 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-nonblocking-cntr-alt.wvr.c[2098,2111] [2021-12-14 16:54:24,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:54:24,213 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:54:24,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:24 WrapperNode [2021-12-14 16:54:24,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:54:24,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:54:24,215 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:54:24,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:54:24,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:24" (1/1) ... [2021-12-14 16:54:24,225 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:24" (1/1) ... [2021-12-14 16:54:24,241 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2021-12-14 16:54:24,242 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:54:24,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:54:24,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:54:24,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:54:24,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:24" (1/1) ... [2021-12-14 16:54:24,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:24" (1/1) ... [2021-12-14 16:54:24,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:24" (1/1) ... [2021-12-14 16:54:24,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:24" (1/1) ... [2021-12-14 16:54:24,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:24" (1/1) ... [2021-12-14 16:54:24,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:24" (1/1) ... [2021-12-14 16:54:24,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:24" (1/1) ... [2021-12-14 16:54:24,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:54:24,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:54:24,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:54:24,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:54:24,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:24" (1/1) ... [2021-12-14 16:54:24,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:54:24,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:54:24,303 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 16:54:24,342 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 16:54:24,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:54:24,359 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-14 16:54:24,359 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-14 16:54:24,359 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-14 16:54:24,360 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-14 16:54:24,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:54:24,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 16:54:24,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 16:54:24,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-14 16:54:24,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-14 16:54:24,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:54:24,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:54:24,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 16:54:24,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 16:54:24,362 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 16:54:24,429 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:54:24,431 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:54:24,564 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:54:24,588 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:54:24,589 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 16:54:24,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:54:24 BoogieIcfgContainer [2021-12-14 16:54:24,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:54:24,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:54:24,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:54:24,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:54:24,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:54:24" (1/3) ... [2021-12-14 16:54:24,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56053cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:54:24, skipping insertion in model container [2021-12-14 16:54:24,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:54:24" (2/3) ... [2021-12-14 16:54:24,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56053cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:54:24, skipping insertion in model container [2021-12-14 16:54:24,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:54:24" (3/3) ... [2021-12-14 16:54:24,596 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2021-12-14 16:54:24,600 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-14 16:54:24,600 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:54:24,600 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 16:54:24,600 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-14 16:54:24,627 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,628 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,628 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,628 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,629 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,629 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,629 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,629 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,630 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,630 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,630 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,630 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,630 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,631 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,631 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,631 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,631 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,631 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,632 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,632 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,632 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,632 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,632 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,633 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,633 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,633 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,633 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,634 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,634 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,634 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,634 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,634 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,635 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,635 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,635 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,635 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,635 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,635 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,636 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,636 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,636 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,636 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,636 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,636 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,639 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,639 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,639 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,639 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,639 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,640 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,641 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,641 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,641 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,641 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:54:24,643 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-14 16:54:24,676 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:54:24,681 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 16:54:24,681 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-14 16:54:24,689 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 188 flow [2021-12-14 16:54:24,721 INFO L129 PetriNetUnfolder]: 6/84 cut-off events. [2021-12-14 16:54:24,722 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-14 16:54:24,724 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 6/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2021-12-14 16:54:24,724 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 188 flow [2021-12-14 16:54:24,728 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 162 flow [2021-12-14 16:54:24,744 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2021-12-14 16:54:24,744 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-14 16:54:24,744 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:54:24,745 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 16:54:24,745 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:54:24,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:54:24,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1565492451, now seen corresponding path program 1 times [2021-12-14 16:54:24,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:54:24,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273632066] [2021-12-14 16:54:24,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:54:24,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:54:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:54:24,919 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 16:54:24,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:54:24,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273632066] [2021-12-14 16:54:24,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273632066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:54:24,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:54:24,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:54:24,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126171037] [2021-12-14 16:54:24,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:54:24,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 16:54:24,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:54:24,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 16:54:24,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 16:54:24,973 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 86 [2021-12-14 16:54:24,976 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 162 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:54:24,981 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:54:24,981 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 86 [2021-12-14 16:54:24,982 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:54:25,033 INFO L129 PetriNetUnfolder]: 10/97 cut-off events. [2021-12-14 16:54:25,033 INFO L130 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2021-12-14 16:54:25,034 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 97 events. 10/97 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 1 based on Foata normal form. 11/98 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2021-12-14 16:54:25,035 INFO L132 encePairwiseOnDemand]: 82/86 looper letters, 6 selfloop transitions, 0 changer transitions 2/71 dead transitions. [2021-12-14 16:54:25,035 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 71 transitions, 166 flow [2021-12-14 16:54:25,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 16:54:25,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-14 16:54:25,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 160 transitions. [2021-12-14 16:54:25,045 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9302325581395349 [2021-12-14 16:54:25,046 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 160 transitions. [2021-12-14 16:54:25,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 160 transitions. [2021-12-14 16:54:25,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:54:25,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 160 transitions. [2021-12-14 16:54:25,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 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 16:54:25,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 16:54:25,056 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 16:54:25,057 INFO L186 Difference]: Start difference. First operand has 76 places, 75 transitions, 162 flow. Second operand 2 states and 160 transitions. [2021-12-14 16:54:25,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 71 transitions, 166 flow [2021-12-14 16:54:25,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-14 16:54:25,061 INFO L242 Difference]: Finished difference. Result has 73 places, 69 transitions, 142 flow [2021-12-14 16:54:25,063 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=142, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2021-12-14 16:54:25,066 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, -3 predicate places. [2021-12-14 16:54:25,066 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 142 flow [2021-12-14 16:54:25,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:54:25,067 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:54:25,067 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 16:54:25,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:54:25,068 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:54:25,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:54:25,073 INFO L85 PathProgramCache]: Analyzing trace with hash -305653797, now seen corresponding path program 1 times [2021-12-14 16:54:25,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:54:25,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592351984] [2021-12-14 16:54:25,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:54:25,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:54:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:54:25,254 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 16:54:25,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:54:25,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592351984] [2021-12-14 16:54:25,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592351984] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:54:25,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:54:25,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:54:25,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106336850] [2021-12-14 16:54:25,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:54:25,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:54:25,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:54:25,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:54:25,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:54:25,259 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 86 [2021-12-14 16:54:25,260 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 6 states have internal predecessors, (355), 0 states have call successors, (0), 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 16:54:25,260 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:54:25,260 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 86 [2021-12-14 16:54:25,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:54:25,327 INFO L129 PetriNetUnfolder]: 41/148 cut-off events. [2021-12-14 16:54:25,328 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-12-14 16:54:25,328 INFO L84 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 148 events. 41/148 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 367 event pairs, 13 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 240. Up to 58 conditions per place. [2021-12-14 16:54:25,329 INFO L132 encePairwiseOnDemand]: 80/86 looper letters, 24 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2021-12-14 16:54:25,329 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 213 flow [2021-12-14 16:54:25,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:54:25,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-14 16:54:25,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 366 transitions. [2021-12-14 16:54:25,332 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7093023255813954 [2021-12-14 16:54:25,332 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 366 transitions. [2021-12-14 16:54:25,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 366 transitions. [2021-12-14 16:54:25,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:54:25,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 366 transitions. [2021-12-14 16:54:25,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 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 16:54:25,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 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 16:54:25,337 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 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 16:54:25,337 INFO L186 Difference]: Start difference. First operand has 73 places, 69 transitions, 142 flow. Second operand 6 states and 366 transitions. [2021-12-14 16:54:25,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 213 flow [2021-12-14 16:54:25,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 75 transitions, 213 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-14 16:54:25,340 INFO L242 Difference]: Finished difference. Result has 77 places, 70 transitions, 160 flow [2021-12-14 16:54:25,340 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2021-12-14 16:54:25,341 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1 predicate places. [2021-12-14 16:54:25,341 INFO L470 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 160 flow [2021-12-14 16:54:25,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 6 states have internal predecessors, (355), 0 states have call successors, (0), 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 16:54:25,341 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:54:25,341 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] [2021-12-14 16:54:25,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:54:25,342 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:54:25,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:54:25,342 INFO L85 PathProgramCache]: Analyzing trace with hash -443057429, now seen corresponding path program 1 times [2021-12-14 16:54:25,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:54:25,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554475340] [2021-12-14 16:54:25,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:54:25,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:54:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:54:25,435 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 16:54:25,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:54:25,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554475340] [2021-12-14 16:54:25,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554475340] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:54:25,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127121493] [2021-12-14 16:54:25,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:54:25,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:54:25,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:54:25,438 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 16:54:25,439 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 16:54:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:54:25,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 16:54:25,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:54:25,647 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 16:54:25,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:54:25,797 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 16:54:25,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127121493] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:54:25,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:54:25,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2021-12-14 16:54:25,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255820735] [2021-12-14 16:54:25,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:54:25,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:54:25,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:54:25,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:54:25,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:54:25,801 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 86 [2021-12-14 16:54:25,802 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 160 flow. Second operand has 10 states, 10 states have (on average 69.5) internal successors, (695), 10 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 16:54:25,802 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:54:25,802 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 86 [2021-12-14 16:54:25,802 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:54:25,873 INFO L129 PetriNetUnfolder]: 31/162 cut-off events. [2021-12-14 16:54:25,873 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2021-12-14 16:54:25,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 162 events. 31/162 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 492 event pairs, 3 based on Foata normal form. 4/159 useless extension candidates. Maximal degree in co-relation 259. Up to 29 conditions per place. [2021-12-14 16:54:25,875 INFO L132 encePairwiseOnDemand]: 80/86 looper letters, 20 selfloop transitions, 11 changer transitions 3/89 dead transitions. [2021-12-14 16:54:25,875 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 89 transitions, 285 flow [2021-12-14 16:54:25,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:54:25,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-14 16:54:25,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 502 transitions. [2021-12-14 16:54:25,878 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8338870431893688 [2021-12-14 16:54:25,878 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 502 transitions. [2021-12-14 16:54:25,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 502 transitions. [2021-12-14 16:54:25,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:54:25,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 502 transitions. [2021-12-14 16:54:25,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.71428571428571) internal successors, (502), 7 states have internal predecessors, (502), 0 states have call successors, (0), 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 16:54:25,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 86.0) internal successors, (688), 8 states have internal predecessors, (688), 0 states have call successors, (0), 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 16:54:25,883 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 86.0) internal successors, (688), 8 states have internal predecessors, (688), 0 states have call successors, (0), 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 16:54:25,883 INFO L186 Difference]: Start difference. First operand has 77 places, 70 transitions, 160 flow. Second operand 7 states and 502 transitions. [2021-12-14 16:54:25,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 89 transitions, 285 flow [2021-12-14 16:54:25,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 89 transitions, 274 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-14 16:54:25,905 INFO L242 Difference]: Finished difference. Result has 84 places, 80 transitions, 243 flow [2021-12-14 16:54:25,906 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=243, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2021-12-14 16:54:25,906 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 8 predicate places. [2021-12-14 16:54:25,907 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 243 flow [2021-12-14 16:54:25,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 69.5) internal successors, (695), 10 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 16:54:25,907 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:54:25,907 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:54:25,942 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 16:54:26,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:54:26,125 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:54:26,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:54:26,126 INFO L85 PathProgramCache]: Analyzing trace with hash 457420513, now seen corresponding path program 1 times [2021-12-14 16:54:26,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:54:26,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408491916] [2021-12-14 16:54:26,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:54:26,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:54:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:54:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:26,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:54:26,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408491916] [2021-12-14 16:54:26,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408491916] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:54:26,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988940456] [2021-12-14 16:54:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:54:26,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:54:26,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:54:26,379 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 16:54:26,380 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 16:54:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:54:26,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:54:26,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:54:26,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:26,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:54:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:27,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988940456] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:54:27,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:54:27,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-14 16:54:27,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932043755] [2021-12-14 16:54:27,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:54:27,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 16:54:27,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:54:27,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 16:54:27,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 16:54:27,361 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-14 16:54:27,363 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 243 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 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 16:54:27,363 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:54:27,364 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-14 16:54:27,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:54:29,155 INFO L129 PetriNetUnfolder]: 287/862 cut-off events. [2021-12-14 16:54:29,156 INFO L130 PetriNetUnfolder]: For 791/794 co-relation queries the response was YES. [2021-12-14 16:54:29,160 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2294 conditions, 862 events. 287/862 cut-off events. For 791/794 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5134 event pairs, 8 based on Foata normal form. 4/822 useless extension candidates. Maximal degree in co-relation 2285. Up to 170 conditions per place. [2021-12-14 16:54:29,165 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 114 selfloop transitions, 130 changer transitions 53/338 dead transitions. [2021-12-14 16:54:29,166 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 338 transitions, 2057 flow [2021-12-14 16:54:29,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-14 16:54:29,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-12-14 16:54:29,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3152 transitions. [2021-12-14 16:54:29,173 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6430028559771522 [2021-12-14 16:54:29,173 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3152 transitions. [2021-12-14 16:54:29,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3152 transitions. [2021-12-14 16:54:29,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:54:29,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3152 transitions. [2021-12-14 16:54:29,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 55.29824561403509) internal successors, (3152), 57 states have internal predecessors, (3152), 0 states have call successors, (0), 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 16:54:29,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 86.0) internal successors, (4988), 58 states have internal predecessors, (4988), 0 states have call successors, (0), 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 16:54:29,194 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 86.0) internal successors, (4988), 58 states have internal predecessors, (4988), 0 states have call successors, (0), 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 16:54:29,195 INFO L186 Difference]: Start difference. First operand has 84 places, 80 transitions, 243 flow. Second operand 57 states and 3152 transitions. [2021-12-14 16:54:29,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 338 transitions, 2057 flow [2021-12-14 16:54:29,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 338 transitions, 2057 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-14 16:54:29,211 INFO L242 Difference]: Finished difference. Result has 171 places, 215 transitions, 1482 flow [2021-12-14 16:54:29,212 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1482, PETRI_PLACES=171, PETRI_TRANSITIONS=215} [2021-12-14 16:54:29,213 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 95 predicate places. [2021-12-14 16:54:29,213 INFO L470 AbstractCegarLoop]: Abstraction has has 171 places, 215 transitions, 1482 flow [2021-12-14 16:54:29,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 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 16:54:29,214 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:54:29,215 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:54:29,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-14 16:54:29,432 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,SelfDestructingSolverStorable3 [2021-12-14 16:54:29,433 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:54:29,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:54:29,433 INFO L85 PathProgramCache]: Analyzing trace with hash -9261233, now seen corresponding path program 2 times [2021-12-14 16:54:29,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:54:29,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20791430] [2021-12-14 16:54:29,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:54:29,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:54:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:54:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:29,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:54:29,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20791430] [2021-12-14 16:54:29,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20791430] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:54:29,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541314862] [2021-12-14 16:54:29,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 16:54:29,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:54:29,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:54:29,660 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 16:54:29,688 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 16:54:29,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 16:54:29,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:54:29,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:54:29,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:54:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:30,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:54:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:30,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541314862] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:54:30,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:54:30,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-14 16:54:30,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819666818] [2021-12-14 16:54:30,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:54:30,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 16:54:30,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:54:30,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 16:54:30,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 16:54:30,599 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-14 16:54:30,601 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 215 transitions, 1482 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 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 16:54:30,601 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:54:30,601 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-14 16:54:30,601 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:54:32,495 INFO L129 PetriNetUnfolder]: 371/1162 cut-off events. [2021-12-14 16:54:32,496 INFO L130 PetriNetUnfolder]: For 3649/3652 co-relation queries the response was YES. [2021-12-14 16:54:32,502 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4525 conditions, 1162 events. 371/1162 cut-off events. For 3649/3652 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7706 event pairs, 25 based on Foata normal form. 2/1154 useless extension candidates. Maximal degree in co-relation 4484. Up to 354 conditions per place. [2021-12-14 16:54:32,508 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 158 selfloop transitions, 197 changer transitions 34/430 dead transitions. [2021-12-14 16:54:32,508 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 430 transitions, 3976 flow [2021-12-14 16:54:32,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-14 16:54:32,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-12-14 16:54:32,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3027 transitions. [2021-12-14 16:54:32,520 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6399577167019027 [2021-12-14 16:54:32,521 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3027 transitions. [2021-12-14 16:54:32,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3027 transitions. [2021-12-14 16:54:32,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:54:32,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3027 transitions. [2021-12-14 16:54:32,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 55.03636363636364) internal successors, (3027), 55 states have internal predecessors, (3027), 0 states have call successors, (0), 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 16:54:32,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 86.0) internal successors, (4816), 56 states have internal predecessors, (4816), 0 states have call successors, (0), 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 16:54:32,553 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 86.0) internal successors, (4816), 56 states have internal predecessors, (4816), 0 states have call successors, (0), 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 16:54:32,553 INFO L186 Difference]: Start difference. First operand has 171 places, 215 transitions, 1482 flow. Second operand 55 states and 3027 transitions. [2021-12-14 16:54:32,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 430 transitions, 3976 flow [2021-12-14 16:54:32,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 430 transitions, 3598 flow, removed 189 selfloop flow, removed 14 redundant places. [2021-12-14 16:54:32,592 INFO L242 Difference]: Finished difference. Result has 223 places, 330 transitions, 3015 flow [2021-12-14 16:54:32,593 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=3015, PETRI_PLACES=223, PETRI_TRANSITIONS=330} [2021-12-14 16:54:32,593 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 147 predicate places. [2021-12-14 16:54:32,594 INFO L470 AbstractCegarLoop]: Abstraction has has 223 places, 330 transitions, 3015 flow [2021-12-14 16:54:32,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 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 16:54:32,595 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:54:32,596 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:54:32,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-14 16:54:32,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:54:32,812 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:54:32,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:54:32,812 INFO L85 PathProgramCache]: Analyzing trace with hash -792817897, now seen corresponding path program 3 times [2021-12-14 16:54:32,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:54:32,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148320062] [2021-12-14 16:54:32,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:54:32,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:54:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:54:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:33,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:54:33,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148320062] [2021-12-14 16:54:33,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148320062] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:54:33,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990625525] [2021-12-14 16:54:33,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 16:54:33,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:54:33,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:54:33,050 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 16:54:33,072 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 16:54:33,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-14 16:54:33,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:54:33,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:54:33,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:54:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:33,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:54:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:34,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990625525] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:54:34,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:54:34,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-14 16:54:34,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188473458] [2021-12-14 16:54:34,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:54:34,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 16:54:34,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:54:34,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 16:54:34,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 16:54:34,015 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-14 16:54:34,016 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 330 transitions, 3015 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 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 16:54:34,016 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:54:34,016 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-14 16:54:34,016 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:54:36,470 INFO L129 PetriNetUnfolder]: 424/1332 cut-off events. [2021-12-14 16:54:36,471 INFO L130 PetriNetUnfolder]: For 5970/5979 co-relation queries the response was YES. [2021-12-14 16:54:36,510 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6129 conditions, 1332 events. 424/1332 cut-off events. For 5970/5979 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9225 event pairs, 15 based on Foata normal form. 2/1330 useless extension candidates. Maximal degree in co-relation 6071. Up to 259 conditions per place. [2021-12-14 16:54:36,518 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 140 selfloop transitions, 307 changer transitions 38/526 dead transitions. [2021-12-14 16:54:36,518 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 526 transitions, 5797 flow [2021-12-14 16:54:36,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-14 16:54:36,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-12-14 16:54:36,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4176 transitions. [2021-12-14 16:54:36,525 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6389228886168911 [2021-12-14 16:54:36,525 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4176 transitions. [2021-12-14 16:54:36,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4176 transitions. [2021-12-14 16:54:36,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:54:36,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4176 transitions. [2021-12-14 16:54:36,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 54.94736842105263) internal successors, (4176), 76 states have internal predecessors, (4176), 0 states have call successors, (0), 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 16:54:36,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 86.0) internal successors, (6622), 77 states have internal predecessors, (6622), 0 states have call successors, (0), 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 16:54:36,546 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 86.0) internal successors, (6622), 77 states have internal predecessors, (6622), 0 states have call successors, (0), 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 16:54:36,547 INFO L186 Difference]: Start difference. First operand has 223 places, 330 transitions, 3015 flow. Second operand 76 states and 4176 transitions. [2021-12-14 16:54:36,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 526 transitions, 5797 flow [2021-12-14 16:54:36,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 526 transitions, 5520 flow, removed 123 selfloop flow, removed 12 redundant places. [2021-12-14 16:54:36,608 INFO L242 Difference]: Finished difference. Result has 292 places, 411 transitions, 4483 flow [2021-12-14 16:54:36,609 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=2874, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=4483, PETRI_PLACES=292, PETRI_TRANSITIONS=411} [2021-12-14 16:54:36,609 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 216 predicate places. [2021-12-14 16:54:36,609 INFO L470 AbstractCegarLoop]: Abstraction has has 292 places, 411 transitions, 4483 flow [2021-12-14 16:54:36,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 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 16:54:36,610 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:54:36,610 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:54:36,629 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 16:54:36,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:54:36,811 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:54:36,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:54:36,812 INFO L85 PathProgramCache]: Analyzing trace with hash 284311289, now seen corresponding path program 4 times [2021-12-14 16:54:36,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:54:36,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892308208] [2021-12-14 16:54:36,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:54:36,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:54:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:54:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:36,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:54:36,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892308208] [2021-12-14 16:54:36,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892308208] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:54:36,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868725232] [2021-12-14 16:54:36,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 16:54:36,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:54:36,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:54:36,999 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 16:54:37,004 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 16:54:37,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 16:54:37,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:54:37,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:54:37,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:54:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:37,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:54:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:37,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868725232] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:54:37,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:54:37,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-14 16:54:37,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501008717] [2021-12-14 16:54:37,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:54:37,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 16:54:37,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:54:37,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 16:54:37,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 16:54:37,862 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-14 16:54:37,864 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 411 transitions, 4483 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 16:54:37,864 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:54:37,864 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-14 16:54:37,864 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:54:40,923 INFO L129 PetriNetUnfolder]: 599/2030 cut-off events. [2021-12-14 16:54:40,924 INFO L130 PetriNetUnfolder]: For 11567/11577 co-relation queries the response was YES. [2021-12-14 16:54:40,934 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9921 conditions, 2030 events. 599/2030 cut-off events. For 11567/11577 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16343 event pairs, 23 based on Foata normal form. 5/2030 useless extension candidates. Maximal degree in co-relation 9853. Up to 387 conditions per place. [2021-12-14 16:54:40,943 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 254 selfloop transitions, 390 changer transitions 33/718 dead transitions. [2021-12-14 16:54:40,944 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 718 transitions, 9166 flow [2021-12-14 16:54:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-14 16:54:40,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-12-14 16:54:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 4263 transitions. [2021-12-14 16:54:40,956 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6437632135306554 [2021-12-14 16:54:40,956 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 4263 transitions. [2021-12-14 16:54:40,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 4263 transitions. [2021-12-14 16:54:40,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:54:40,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 4263 transitions. [2021-12-14 16:54:40,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 55.36363636363637) internal successors, (4263), 77 states have internal predecessors, (4263), 0 states have call successors, (0), 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 16:54:40,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 86.0) internal successors, (6708), 78 states have internal predecessors, (6708), 0 states have call successors, (0), 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 16:54:40,988 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 86.0) internal successors, (6708), 78 states have internal predecessors, (6708), 0 states have call successors, (0), 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 16:54:40,988 INFO L186 Difference]: Start difference. First operand has 292 places, 411 transitions, 4483 flow. Second operand 77 states and 4263 transitions. [2021-12-14 16:54:40,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 718 transitions, 9166 flow [2021-12-14 16:54:41,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 718 transitions, 8323 flow, removed 220 selfloop flow, removed 39 redundant places. [2021-12-14 16:54:41,060 INFO L242 Difference]: Finished difference. Result has 345 places, 545 transitions, 6643 flow [2021-12-14 16:54:41,061 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=3955, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=6643, PETRI_PLACES=345, PETRI_TRANSITIONS=545} [2021-12-14 16:54:41,062 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 269 predicate places. [2021-12-14 16:54:41,062 INFO L470 AbstractCegarLoop]: Abstraction has has 345 places, 545 transitions, 6643 flow [2021-12-14 16:54:41,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 16:54:41,063 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:54:41,063 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:54:41,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-14 16:54:41,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:54:41,265 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:54:41,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:54:41,275 INFO L85 PathProgramCache]: Analyzing trace with hash -720158959, now seen corresponding path program 5 times [2021-12-14 16:54:41,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:54:41,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108012040] [2021-12-14 16:54:41,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:54:41,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:54:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:54:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:41,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:54:41,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108012040] [2021-12-14 16:54:41,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108012040] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:54:41,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135670544] [2021-12-14 16:54:41,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 16:54:41,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:54:41,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:54:41,529 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 16:54:41,563 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 16:54:41,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 16:54:41,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:54:41,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:54:41,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:54:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:42,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:54:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:42,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135670544] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:54:42,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:54:42,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-14 16:54:42,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886366812] [2021-12-14 16:54:42,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:54:42,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 16:54:42,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:54:42,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 16:54:42,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 16:54:42,564 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-14 16:54:42,565 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 545 transitions, 6643 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 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 16:54:42,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:54:42,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-14 16:54:42,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:54:46,137 INFO L129 PetriNetUnfolder]: 599/1933 cut-off events. [2021-12-14 16:54:46,137 INFO L130 PetriNetUnfolder]: For 16372/16379 co-relation queries the response was YES. [2021-12-14 16:54:46,150 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10714 conditions, 1933 events. 599/1933 cut-off events. For 16372/16379 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15107 event pairs, 32 based on Foata normal form. 6/1933 useless extension candidates. Maximal degree in co-relation 10630. Up to 374 conditions per place. [2021-12-14 16:54:46,161 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 164 selfloop transitions, 406 changer transitions 48/659 dead transitions. [2021-12-14 16:54:46,161 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 659 transitions, 9086 flow [2021-12-14 16:54:46,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-14 16:54:46,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-12-14 16:54:46,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 4388 transitions. [2021-12-14 16:54:46,180 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6377906976744186 [2021-12-14 16:54:46,180 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 4388 transitions. [2021-12-14 16:54:46,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 4388 transitions. [2021-12-14 16:54:46,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:54:46,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 4388 transitions. [2021-12-14 16:54:46,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 54.85) internal successors, (4388), 80 states have internal predecessors, (4388), 0 states have call successors, (0), 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 16:54:46,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 86.0) internal successors, (6966), 81 states have internal predecessors, (6966), 0 states have call successors, (0), 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 16:54:46,210 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 86.0) internal successors, (6966), 81 states have internal predecessors, (6966), 0 states have call successors, (0), 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 16:54:46,210 INFO L186 Difference]: Start difference. First operand has 345 places, 545 transitions, 6643 flow. Second operand 80 states and 4388 transitions. [2021-12-14 16:54:46,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 659 transitions, 9086 flow [2021-12-14 16:54:46,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 659 transitions, 8546 flow, removed 154 selfloop flow, removed 34 redundant places. [2021-12-14 16:54:46,352 INFO L242 Difference]: Finished difference. Result has 391 places, 537 transitions, 7007 flow [2021-12-14 16:54:46,353 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=6256, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=7007, PETRI_PLACES=391, PETRI_TRANSITIONS=537} [2021-12-14 16:54:46,353 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 315 predicate places. [2021-12-14 16:54:46,353 INFO L470 AbstractCegarLoop]: Abstraction has has 391 places, 537 transitions, 7007 flow [2021-12-14 16:54:46,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 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 16:54:46,354 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:54:46,354 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:54:46,372 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 16:54:46,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:54:46,568 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:54:46,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:54:46,568 INFO L85 PathProgramCache]: Analyzing trace with hash -870442055, now seen corresponding path program 6 times [2021-12-14 16:54:46,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:54:46,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699182908] [2021-12-14 16:54:46,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:54:46,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:54:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:54:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:46,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:54:46,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699182908] [2021-12-14 16:54:46,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699182908] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:54:46,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538233556] [2021-12-14 16:54:46,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 16:54:46,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:54:46,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:54:46,774 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 16:54:46,775 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 16:54:46,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-14 16:54:46,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:54:46,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:54:46,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:54:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:47,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:54:47,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:47,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538233556] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:54:47,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:54:47,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-14 16:54:47,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861070244] [2021-12-14 16:54:47,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:54:47,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 16:54:47,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:54:47,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 16:54:47,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 16:54:47,709 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-14 16:54:47,710 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 537 transitions, 7007 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 16:54:47,710 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:54:47,710 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-14 16:54:47,710 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:54:49,883 INFO L129 PetriNetUnfolder]: 768/2357 cut-off events. [2021-12-14 16:54:49,883 INFO L130 PetriNetUnfolder]: For 22235/22241 co-relation queries the response was YES. [2021-12-14 16:54:49,903 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14134 conditions, 2357 events. 768/2357 cut-off events. For 22235/22241 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 19153 event pairs, 51 based on Foata normal form. 2/2351 useless extension candidates. Maximal degree in co-relation 14052. Up to 790 conditions per place. [2021-12-14 16:54:49,920 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 251 selfloop transitions, 547 changer transitions 23/862 dead transitions. [2021-12-14 16:54:49,921 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 862 transitions, 13171 flow [2021-12-14 16:54:49,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-14 16:54:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-12-14 16:54:49,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3184 transitions. [2021-12-14 16:54:49,925 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6383319967923016 [2021-12-14 16:54:49,925 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3184 transitions. [2021-12-14 16:54:49,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3184 transitions. [2021-12-14 16:54:49,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:54:49,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3184 transitions. [2021-12-14 16:54:49,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 54.89655172413793) internal successors, (3184), 58 states have internal predecessors, (3184), 0 states have call successors, (0), 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 16:54:49,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 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 16:54:49,968 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 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 16:54:49,968 INFO L186 Difference]: Start difference. First operand has 391 places, 537 transitions, 7007 flow. Second operand 58 states and 3184 transitions. [2021-12-14 16:54:49,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 862 transitions, 13171 flow [2021-12-14 16:54:50,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 862 transitions, 11850 flow, removed 62 selfloop flow, removed 73 redundant places. [2021-12-14 16:54:50,099 INFO L242 Difference]: Finished difference. Result has 376 places, 770 transitions, 11246 flow [2021-12-14 16:54:50,100 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=6156, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=11246, PETRI_PLACES=376, PETRI_TRANSITIONS=770} [2021-12-14 16:54:50,100 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 300 predicate places. [2021-12-14 16:54:50,101 INFO L470 AbstractCegarLoop]: Abstraction has has 376 places, 770 transitions, 11246 flow [2021-12-14 16:54:50,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 16:54:50,101 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:54:50,101 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:54:50,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-14 16:54:50,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:54:50,323 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:54:50,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:54:50,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1120347653, now seen corresponding path program 7 times [2021-12-14 16:54:50,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:54:50,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323775996] [2021-12-14 16:54:50,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:54:50,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:54:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:54:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:50,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:54:50,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323775996] [2021-12-14 16:54:50,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323775996] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:54:50,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771148279] [2021-12-14 16:54:50,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 16:54:50,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:54:50,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:54:50,560 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 16:54:50,596 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 16:54:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:54:50,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:54:50,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:54:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:51,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:54:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:51,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771148279] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:54:51,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:54:51,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-14 16:54:51,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354555400] [2021-12-14 16:54:51,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:54:51,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 16:54:51,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:54:51,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 16:54:51,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 16:54:51,498 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-14 16:54:51,499 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 770 transitions, 11246 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 16:54:51,499 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:54:51,499 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-14 16:54:51,499 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:54:54,007 INFO L129 PetriNetUnfolder]: 854/2681 cut-off events. [2021-12-14 16:54:54,007 INFO L130 PetriNetUnfolder]: For 32245/32251 co-relation queries the response was YES. [2021-12-14 16:54:54,037 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16902 conditions, 2681 events. 854/2681 cut-off events. For 32245/32251 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 22814 event pairs, 52 based on Foata normal form. 2/2676 useless extension candidates. Maximal degree in co-relation 16813. Up to 785 conditions per place. [2021-12-14 16:54:54,078 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 261 selfloop transitions, 653 changer transitions 41/996 dead transitions. [2021-12-14 16:54:54,079 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 996 transitions, 16389 flow [2021-12-14 16:54:54,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-14 16:54:54,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-12-14 16:54:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3647 transitions. [2021-12-14 16:54:54,082 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6425299506694856 [2021-12-14 16:54:54,082 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 3647 transitions. [2021-12-14 16:54:54,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 3647 transitions. [2021-12-14 16:54:54,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:54:54,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 3647 transitions. [2021-12-14 16:54:54,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 55.25757575757576) internal successors, (3647), 66 states have internal predecessors, (3647), 0 states have call successors, (0), 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 16:54:54,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 86.0) internal successors, (5762), 67 states have internal predecessors, (5762), 0 states have call successors, (0), 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 16:54:54,105 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 86.0) internal successors, (5762), 67 states have internal predecessors, (5762), 0 states have call successors, (0), 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 16:54:54,105 INFO L186 Difference]: Start difference. First operand has 376 places, 770 transitions, 11246 flow. Second operand 66 states and 3647 transitions. [2021-12-14 16:54:54,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 996 transitions, 16389 flow [2021-12-14 16:54:54,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 996 transitions, 15684 flow, removed 229 selfloop flow, removed 27 redundant places. [2021-12-14 16:54:54,449 INFO L242 Difference]: Finished difference. Result has 430 places, 871 transitions, 14249 flow [2021-12-14 16:54:54,450 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=10669, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=559, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=14249, PETRI_PLACES=430, PETRI_TRANSITIONS=871} [2021-12-14 16:54:54,450 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 354 predicate places. [2021-12-14 16:54:54,451 INFO L470 AbstractCegarLoop]: Abstraction has has 430 places, 871 transitions, 14249 flow [2021-12-14 16:54:54,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 16:54:54,451 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:54:54,451 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:54:54,470 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 16:54:54,667 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,SelfDestructingSolverStorable9 [2021-12-14 16:54:54,668 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:54:54,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:54:54,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1699932231, now seen corresponding path program 8 times [2021-12-14 16:54:54,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:54:54,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949969740] [2021-12-14 16:54:54,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:54:54,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:54:54,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:54:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:54,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:54:54,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949969740] [2021-12-14 16:54:54,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949969740] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:54:54,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108312082] [2021-12-14 16:54:54,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 16:54:54,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:54:54,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:54:54,914 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 16:54:54,915 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 16:54:54,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 16:54:54,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:54:54,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:54:54,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:54:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:55,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:54:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:55,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108312082] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:54:55,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:54:55,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-14 16:54:55,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063243429] [2021-12-14 16:54:55,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:54:55,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 16:54:55,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:54:55,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 16:54:55,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 16:54:55,777 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-14 16:54:55,778 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 871 transitions, 14249 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 16:54:55,778 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:54:55,778 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-14 16:54:55,778 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:54:58,146 INFO L129 PetriNetUnfolder]: 826/2525 cut-off events. [2021-12-14 16:54:58,146 INFO L130 PetriNetUnfolder]: For 39703/39717 co-relation queries the response was YES. [2021-12-14 16:54:58,165 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17477 conditions, 2525 events. 826/2525 cut-off events. For 39703/39717 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20766 event pairs, 58 based on Foata normal form. 5/2523 useless extension candidates. Maximal degree in co-relation 17379. Up to 743 conditions per place. [2021-12-14 16:54:58,178 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 308 selfloop transitions, 587 changer transitions 25/961 dead transitions. [2021-12-14 16:54:58,178 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 961 transitions, 17258 flow [2021-12-14 16:54:58,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-14 16:54:58,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-12-14 16:54:58,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3196 transitions. [2021-12-14 16:54:58,181 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.640737770649559 [2021-12-14 16:54:58,182 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3196 transitions. [2021-12-14 16:54:58,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3196 transitions. [2021-12-14 16:54:58,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:54:58,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3196 transitions. [2021-12-14 16:54:58,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 55.10344827586207) internal successors, (3196), 58 states have internal predecessors, (3196), 0 states have call successors, (0), 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 16:54:58,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 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 16:54:58,189 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 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 16:54:58,190 INFO L186 Difference]: Start difference. First operand has 430 places, 871 transitions, 14249 flow. Second operand 58 states and 3196 transitions. [2021-12-14 16:54:58,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 961 transitions, 17258 flow [2021-12-14 16:54:58,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 961 transitions, 16485 flow, removed 156 selfloop flow, removed 40 redundant places. [2021-12-14 16:54:58,501 INFO L242 Difference]: Finished difference. Result has 450 places, 879 transitions, 15005 flow [2021-12-14 16:54:58,502 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=13553, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=577, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=15005, PETRI_PLACES=450, PETRI_TRANSITIONS=879} [2021-12-14 16:54:58,502 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 374 predicate places. [2021-12-14 16:54:58,502 INFO L470 AbstractCegarLoop]: Abstraction has has 450 places, 879 transitions, 15005 flow [2021-12-14 16:54:58,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 16:54:58,503 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:54:58,503 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:54:58,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-14 16:54:58,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:54:58,719 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:54:58,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:54:58,720 INFO L85 PathProgramCache]: Analyzing trace with hash -306787371, now seen corresponding path program 9 times [2021-12-14 16:54:58,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:54:58,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484072800] [2021-12-14 16:54:58,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:54:58,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:54:58,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:54:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:58,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:54:58,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484072800] [2021-12-14 16:54:58,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484072800] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:54:58,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672406582] [2021-12-14 16:54:58,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 16:54:58,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:54:58,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:54:58,971 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 16:54:58,988 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 16:54:59,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-14 16:54:59,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:54:59,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:54:59,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:54:59,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:59,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:54:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:59,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672406582] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:54:59,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:54:59,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-14 16:54:59,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699389188] [2021-12-14 16:54:59,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:54:59,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 16:54:59,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:54:59,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 16:54:59,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 16:54:59,849 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-14 16:54:59,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 879 transitions, 15005 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 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 16:54:59,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:54:59,850 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-14 16:54:59,850 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:01,327 INFO L129 PetriNetUnfolder]: 859/2598 cut-off events. [2021-12-14 16:55:01,328 INFO L130 PetriNetUnfolder]: For 41933/41939 co-relation queries the response was YES. [2021-12-14 16:55:01,351 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19038 conditions, 2598 events. 859/2598 cut-off events. For 41933/41939 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21481 event pairs, 57 based on Foata normal form. 1/2592 useless extension candidates. Maximal degree in co-relation 18935. Up to 1110 conditions per place. [2021-12-14 16:55:01,367 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 421 selfloop transitions, 567 changer transitions 17/1046 dead transitions. [2021-12-14 16:55:01,367 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 1046 transitions, 19704 flow [2021-12-14 16:55:01,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 16:55:01,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-14 16:55:01,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1729 transitions. [2021-12-14 16:55:01,369 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6485371342835708 [2021-12-14 16:55:01,369 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1729 transitions. [2021-12-14 16:55:01,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1729 transitions. [2021-12-14 16:55:01,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:01,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1729 transitions. [2021-12-14 16:55:01,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.774193548387096) internal successors, (1729), 31 states have internal predecessors, (1729), 0 states have call successors, (0), 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 16:55:01,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 86.0) internal successors, (2752), 32 states have internal predecessors, (2752), 0 states have call successors, (0), 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 16:55:01,374 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 86.0) internal successors, (2752), 32 states have internal predecessors, (2752), 0 states have call successors, (0), 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 16:55:01,374 INFO L186 Difference]: Start difference. First operand has 450 places, 879 transitions, 15005 flow. Second operand 31 states and 1729 transitions. [2021-12-14 16:55:01,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 1046 transitions, 19704 flow [2021-12-14 16:55:01,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1046 transitions, 19140 flow, removed 50 selfloop flow, removed 39 redundant places. [2021-12-14 16:55:01,716 INFO L242 Difference]: Finished difference. Result has 449 places, 960 transitions, 18260 flow [2021-12-14 16:55:01,717 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=14520, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=879, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=490, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=18260, PETRI_PLACES=449, PETRI_TRANSITIONS=960} [2021-12-14 16:55:01,717 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 373 predicate places. [2021-12-14 16:55:01,717 INFO L470 AbstractCegarLoop]: Abstraction has has 449 places, 960 transitions, 18260 flow [2021-12-14 16:55:01,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 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 16:55:01,718 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:01,718 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:55:01,735 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 16:55:01,926 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,SelfDestructingSolverStorable11 [2021-12-14 16:55:01,926 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:01,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:01,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1921340575, now seen corresponding path program 10 times [2021-12-14 16:55:01,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:01,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188032668] [2021-12-14 16:55:01,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:01,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:01,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:02,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:02,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188032668] [2021-12-14 16:55:02,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188032668] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:55:02,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026533470] [2021-12-14 16:55:02,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 16:55:02,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:55:02,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:55:02,158 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 16:55:02,159 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 16:55:02,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 16:55:02,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:55:02,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:55:02,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:55:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:02,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:55:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:02,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026533470] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:55:02,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:55:02,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-14 16:55:02,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173900176] [2021-12-14 16:55:02,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:55:02,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 16:55:02,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:02,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 16:55:02,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 16:55:02,870 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-14 16:55:02,871 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 960 transitions, 18260 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 16:55:02,871 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:02,871 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-14 16:55:02,872 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:04,465 INFO L129 PetriNetUnfolder]: 880/2656 cut-off events. [2021-12-14 16:55:04,466 INFO L130 PetriNetUnfolder]: For 48450/48459 co-relation queries the response was YES. [2021-12-14 16:55:04,487 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20838 conditions, 2656 events. 880/2656 cut-off events. For 48450/48459 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 22052 event pairs, 59 based on Foata normal form. 1/2647 useless extension candidates. Maximal degree in co-relation 20730. Up to 1121 conditions per place. [2021-12-14 16:55:04,499 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 422 selfloop transitions, 588 changer transitions 14/1065 dead transitions. [2021-12-14 16:55:04,500 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 1065 transitions, 22003 flow [2021-12-14 16:55:04,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-14 16:55:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-12-14 16:55:04,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2211 transitions. [2021-12-14 16:55:04,508 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6427325581395349 [2021-12-14 16:55:04,508 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2211 transitions. [2021-12-14 16:55:04,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2211 transitions. [2021-12-14 16:55:04,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:04,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2211 transitions. [2021-12-14 16:55:04,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.275) internal successors, (2211), 40 states have internal predecessors, (2211), 0 states have call successors, (0), 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 16:55:04,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 86.0) internal successors, (3526), 41 states have internal predecessors, (3526), 0 states have call successors, (0), 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 16:55:04,513 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 86.0) internal successors, (3526), 41 states have internal predecessors, (3526), 0 states have call successors, (0), 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 16:55:04,514 INFO L186 Difference]: Start difference. First operand has 449 places, 960 transitions, 18260 flow. Second operand 40 states and 2211 transitions. [2021-12-14 16:55:04,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 1065 transitions, 22003 flow [2021-12-14 16:55:04,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 1065 transitions, 21825 flow, removed 43 selfloop flow, removed 11 redundant places. [2021-12-14 16:55:04,847 INFO L242 Difference]: Finished difference. Result has 484 places, 1000 transitions, 20318 flow [2021-12-14 16:55:04,848 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=18104, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=960, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=553, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=20318, PETRI_PLACES=484, PETRI_TRANSITIONS=1000} [2021-12-14 16:55:04,848 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 408 predicate places. [2021-12-14 16:55:04,849 INFO L470 AbstractCegarLoop]: Abstraction has has 484 places, 1000 transitions, 20318 flow [2021-12-14 16:55:04,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 16:55:04,849 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:04,849 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:55:04,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-14 16:55:05,066 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,SelfDestructingSolverStorable12 [2021-12-14 16:55:05,066 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:05,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:05,066 INFO L85 PathProgramCache]: Analyzing trace with hash 84064215, now seen corresponding path program 11 times [2021-12-14 16:55:05,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:05,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961272923] [2021-12-14 16:55:05,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:05,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:05,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:05,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961272923] [2021-12-14 16:55:05,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961272923] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:55:05,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064718259] [2021-12-14 16:55:05,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 16:55:05,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:55:05,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:55:05,300 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 16:55:05,301 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 16:55:05,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-14 16:55:05,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:55:05,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:55:05,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:55:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:05,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:55:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:06,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064718259] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:55:06,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:55:06,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-14 16:55:06,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387337954] [2021-12-14 16:55:06,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:55:06,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 16:55:06,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:06,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 16:55:06,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 16:55:06,297 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-14 16:55:06,298 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 1000 transitions, 20318 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 16:55:06,298 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:06,298 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-14 16:55:06,298 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:08,450 INFO L129 PetriNetUnfolder]: 931/2824 cut-off events. [2021-12-14 16:55:08,451 INFO L130 PetriNetUnfolder]: For 57895/57901 co-relation queries the response was YES. [2021-12-14 16:55:08,474 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23536 conditions, 2824 events. 931/2824 cut-off events. For 57895/57901 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 24016 event pairs, 56 based on Foata normal form. 1/2816 useless extension candidates. Maximal degree in co-relation 23419. Up to 1062 conditions per place. [2021-12-14 16:55:08,489 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 385 selfloop transitions, 714 changer transitions 21/1161 dead transitions. [2021-12-14 16:55:08,489 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 1161 transitions, 25716 flow [2021-12-14 16:55:08,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-14 16:55:08,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-12-14 16:55:08,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2608 transitions. [2021-12-14 16:55:08,501 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6452251360712519 [2021-12-14 16:55:08,501 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2608 transitions. [2021-12-14 16:55:08,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2608 transitions. [2021-12-14 16:55:08,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:08,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2608 transitions. [2021-12-14 16:55:08,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 55.48936170212766) internal successors, (2608), 47 states have internal predecessors, (2608), 0 states have call successors, (0), 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 16:55:08,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 86.0) internal successors, (4128), 48 states have internal predecessors, (4128), 0 states have call successors, (0), 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 16:55:08,507 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 86.0) internal successors, (4128), 48 states have internal predecessors, (4128), 0 states have call successors, (0), 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 16:55:08,507 INFO L186 Difference]: Start difference. First operand has 484 places, 1000 transitions, 20318 flow. Second operand 47 states and 2608 transitions. [2021-12-14 16:55:08,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 1161 transitions, 25716 flow [2021-12-14 16:55:08,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 1161 transitions, 25587 flow, removed 55 selfloop flow, removed 7 redundant places. [2021-12-14 16:55:08,960 INFO L242 Difference]: Finished difference. Result has 532 places, 1061 transitions, 23398 flow [2021-12-14 16:55:08,961 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=20217, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1000, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=654, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=23398, PETRI_PLACES=532, PETRI_TRANSITIONS=1061} [2021-12-14 16:55:08,962 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 456 predicate places. [2021-12-14 16:55:08,962 INFO L470 AbstractCegarLoop]: Abstraction has has 532 places, 1061 transitions, 23398 flow [2021-12-14 16:55:08,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 16:55:08,962 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:08,963 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:55:08,979 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 16:55:09,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-14 16:55:09,175 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:09,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:09,176 INFO L85 PathProgramCache]: Analyzing trace with hash -641223733, now seen corresponding path program 12 times [2021-12-14 16:55:09,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:09,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819092280] [2021-12-14 16:55:09,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:09,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:09,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:09,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819092280] [2021-12-14 16:55:09,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819092280] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:55:09,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332270051] [2021-12-14 16:55:09,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 16:55:09,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:55:09,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:55:09,360 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 16:55:09,361 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 16:55:09,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-14 16:55:09,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:55:09,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:55:09,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:55:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:09,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:55:10,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:10,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332270051] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:55:10,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:55:10,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-14 16:55:10,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757710791] [2021-12-14 16:55:10,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:55:10,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 16:55:10,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:10,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 16:55:10,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 16:55:10,291 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-14 16:55:10,292 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 1061 transitions, 23398 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 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 16:55:10,292 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:10,292 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-14 16:55:10,292 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:12,550 INFO L129 PetriNetUnfolder]: 968/2913 cut-off events. [2021-12-14 16:55:12,551 INFO L130 PetriNetUnfolder]: For 70264/70277 co-relation queries the response was YES. [2021-12-14 16:55:12,580 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26027 conditions, 2913 events. 968/2913 cut-off events. For 70264/70277 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24936 event pairs, 64 based on Foata normal form. 4/2910 useless extension candidates. Maximal degree in co-relation 25900. Up to 1009 conditions per place. [2021-12-14 16:55:12,596 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 481 selfloop transitions, 649 changer transitions 24/1195 dead transitions. [2021-12-14 16:55:12,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 1195 transitions, 28196 flow [2021-12-14 16:55:12,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-14 16:55:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-12-14 16:55:12,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2593 transitions. [2021-12-14 16:55:12,599 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6415141019297378 [2021-12-14 16:55:12,599 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2593 transitions. [2021-12-14 16:55:12,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2593 transitions. [2021-12-14 16:55:12,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:12,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2593 transitions. [2021-12-14 16:55:12,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 55.170212765957444) internal successors, (2593), 47 states have internal predecessors, (2593), 0 states have call successors, (0), 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 16:55:12,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 86.0) internal successors, (4128), 48 states have internal predecessors, (4128), 0 states have call successors, (0), 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 16:55:12,605 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 86.0) internal successors, (4128), 48 states have internal predecessors, (4128), 0 states have call successors, (0), 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 16:55:12,606 INFO L186 Difference]: Start difference. First operand has 532 places, 1061 transitions, 23398 flow. Second operand 47 states and 2593 transitions. [2021-12-14 16:55:12,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 1195 transitions, 28196 flow [2021-12-14 16:55:13,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 1195 transitions, 27306 flow, removed 102 selfloop flow, removed 29 redundant places. [2021-12-14 16:55:13,420 INFO L242 Difference]: Finished difference. Result has 555 places, 1095 transitions, 24653 flow [2021-12-14 16:55:13,421 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=22524, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1061, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=615, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=24653, PETRI_PLACES=555, PETRI_TRANSITIONS=1095} [2021-12-14 16:55:13,422 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 479 predicate places. [2021-12-14 16:55:13,422 INFO L470 AbstractCegarLoop]: Abstraction has has 555 places, 1095 transitions, 24653 flow [2021-12-14 16:55:13,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 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 16:55:13,423 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:13,423 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:55:13,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-14 16:55:13,639 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,SelfDestructingSolverStorable14 [2021-12-14 16:55:13,640 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:13,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:13,640 INFO L85 PathProgramCache]: Analyzing trace with hash 453043923, now seen corresponding path program 13 times [2021-12-14 16:55:13,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:13,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581257818] [2021-12-14 16:55:13,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:13,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:13,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:13,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581257818] [2021-12-14 16:55:13,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581257818] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:55:13,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384423786] [2021-12-14 16:55:13,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 16:55:13,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:55:13,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:55:13,845 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 16:55:13,891 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 16:55:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:13,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:55:13,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:55:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:14,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:55:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:14,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384423786] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:55:14,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:55:14,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-14 16:55:14,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333225123] [2021-12-14 16:55:14,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:55:14,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 16:55:14,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:14,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 16:55:14,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 16:55:14,786 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-14 16:55:14,787 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 1095 transitions, 24653 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 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 16:55:14,787 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:14,787 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-14 16:55:14,787 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:17,212 INFO L129 PetriNetUnfolder]: 969/2947 cut-off events. [2021-12-14 16:55:17,212 INFO L130 PetriNetUnfolder]: For 73593/73599 co-relation queries the response was YES. [2021-12-14 16:55:17,246 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26854 conditions, 2947 events. 969/2947 cut-off events. For 73593/73599 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 25442 event pairs, 53 based on Foata normal form. 1/2939 useless extension candidates. Maximal degree in co-relation 26722. Up to 1153 conditions per place. [2021-12-14 16:55:17,263 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 418 selfloop transitions, 767 changer transitions 19/1245 dead transitions. [2021-12-14 16:55:17,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 1245 transitions, 29921 flow [2021-12-14 16:55:17,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-14 16:55:17,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-12-14 16:55:17,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2593 transitions. [2021-12-14 16:55:17,266 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6415141019297378 [2021-12-14 16:55:17,267 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2593 transitions. [2021-12-14 16:55:17,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2593 transitions. [2021-12-14 16:55:17,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:17,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2593 transitions. [2021-12-14 16:55:17,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 55.170212765957444) internal successors, (2593), 47 states have internal predecessors, (2593), 0 states have call successors, (0), 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 16:55:17,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 86.0) internal successors, (4128), 48 states have internal predecessors, (4128), 0 states have call successors, (0), 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 16:55:17,272 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 86.0) internal successors, (4128), 48 states have internal predecessors, (4128), 0 states have call successors, (0), 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 16:55:17,272 INFO L186 Difference]: Start difference. First operand has 555 places, 1095 transitions, 24653 flow. Second operand 47 states and 2593 transitions. [2021-12-14 16:55:17,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 1245 transitions, 29921 flow [2021-12-14 16:55:17,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 1245 transitions, 29532 flow, removed 68 selfloop flow, removed 28 redundant places. [2021-12-14 16:55:17,962 INFO L242 Difference]: Finished difference. Result has 580 places, 1162 transitions, 27614 flow [2021-12-14 16:55:17,963 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=24350, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1095, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=706, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=27614, PETRI_PLACES=580, PETRI_TRANSITIONS=1162} [2021-12-14 16:55:17,963 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 504 predicate places. [2021-12-14 16:55:17,963 INFO L470 AbstractCegarLoop]: Abstraction has has 580 places, 1162 transitions, 27614 flow [2021-12-14 16:55:17,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 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 16:55:17,964 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:17,964 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:55:17,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-14 16:55:18,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:55:18,180 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:18,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:18,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1579985151, now seen corresponding path program 14 times [2021-12-14 16:55:18,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:18,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563596027] [2021-12-14 16:55:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:18,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:18,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:18,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563596027] [2021-12-14 16:55:18,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563596027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:55:18,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338599501] [2021-12-14 16:55:18,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 16:55:18,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:55:18,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:55:18,402 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 16:55:18,404 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 16:55:18,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 16:55:18,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:55:18,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:55:18,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:55:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:18,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:55:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:19,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338599501] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:55:19,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:55:19,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-14 16:55:19,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698729699] [2021-12-14 16:55:19,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:55:19,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 16:55:19,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:19,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 16:55:19,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 16:55:19,263 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-14 16:55:19,263 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 1162 transitions, 27614 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 16:55:19,264 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:19,264 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-14 16:55:19,264 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:21,098 INFO L129 PetriNetUnfolder]: 982/2981 cut-off events. [2021-12-14 16:55:21,099 INFO L130 PetriNetUnfolder]: For 77846/77852 co-relation queries the response was YES. [2021-12-14 16:55:21,143 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28521 conditions, 2981 events. 982/2981 cut-off events. For 77846/77852 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 25812 event pairs, 52 based on Foata normal form. 1/2974 useless extension candidates. Maximal degree in co-relation 28383. Up to 1213 conditions per place. [2021-12-14 16:55:21,158 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 497 selfloop transitions, 732 changer transitions 16/1286 dead transitions. [2021-12-14 16:55:21,159 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 1286 transitions, 32522 flow [2021-12-14 16:55:21,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-14 16:55:21,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-12-14 16:55:21,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2482 transitions. [2021-12-14 16:55:21,161 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.641343669250646 [2021-12-14 16:55:21,161 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2482 transitions. [2021-12-14 16:55:21,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2482 transitions. [2021-12-14 16:55:21,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:21,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2482 transitions. [2021-12-14 16:55:21,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 55.15555555555556) internal successors, (2482), 45 states have internal predecessors, (2482), 0 states have call successors, (0), 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 16:55:21,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 86.0) internal successors, (3956), 46 states have internal predecessors, (3956), 0 states have call successors, (0), 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 16:55:21,167 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 86.0) internal successors, (3956), 46 states have internal predecessors, (3956), 0 states have call successors, (0), 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 16:55:21,167 INFO L186 Difference]: Start difference. First operand has 580 places, 1162 transitions, 27614 flow. Second operand 45 states and 2482 transitions. [2021-12-14 16:55:21,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 1286 transitions, 32522 flow [2021-12-14 16:55:21,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 1286 transitions, 31506 flow, removed 131 selfloop flow, removed 22 redundant places. [2021-12-14 16:55:21,930 INFO L242 Difference]: Finished difference. Result has 612 places, 1206 transitions, 30227 flow [2021-12-14 16:55:21,931 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=26690, PETRI_DIFFERENCE_MINUEND_PLACES=554, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=689, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=30227, PETRI_PLACES=612, PETRI_TRANSITIONS=1206} [2021-12-14 16:55:21,931 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 536 predicate places. [2021-12-14 16:55:21,931 INFO L470 AbstractCegarLoop]: Abstraction has has 612 places, 1206 transitions, 30227 flow [2021-12-14 16:55:21,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 16:55:21,932 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:21,932 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:55:21,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-14 16:55:22,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-14 16:55:22,146 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:22,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:22,147 INFO L85 PathProgramCache]: Analyzing trace with hash 2104963723, now seen corresponding path program 15 times [2021-12-14 16:55:22,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:22,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755527687] [2021-12-14 16:55:22,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:22,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:22,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:22,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755527687] [2021-12-14 16:55:22,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755527687] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:55:22,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926523775] [2021-12-14 16:55:22,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 16:55:22,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:55:22,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:55:22,309 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:55:22,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-14 16:55:22,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-14 16:55:22,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:55:22,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:55:22,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:55:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:22,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:55:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:23,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926523775] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:55:23,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:55:23,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-14 16:55:23,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023215067] [2021-12-14 16:55:23,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:55:23,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 16:55:23,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:23,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 16:55:23,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 16:55:23,276 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-14 16:55:23,277 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 1206 transitions, 30227 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 16:55:23,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:23,277 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-14 16:55:23,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:25,893 INFO L129 PetriNetUnfolder]: 1011/3088 cut-off events. [2021-12-14 16:55:25,894 INFO L130 PetriNetUnfolder]: For 87981/87988 co-relation queries the response was YES. [2021-12-14 16:55:25,938 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30930 conditions, 3088 events. 1011/3088 cut-off events. For 87981/87988 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 27075 event pairs, 53 based on Foata normal form. 1/3081 useless extension candidates. Maximal degree in co-relation 30782. Up to 1123 conditions per place. [2021-12-14 16:55:25,956 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 432 selfloop transitions, 855 changer transitions 27/1355 dead transitions. [2021-12-14 16:55:25,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 1355 transitions, 36038 flow [2021-12-14 16:55:25,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-14 16:55:25,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-12-14 16:55:25,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3150 transitions. [2021-12-14 16:55:25,959 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.642594859241126 [2021-12-14 16:55:25,959 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3150 transitions. [2021-12-14 16:55:25,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3150 transitions. [2021-12-14 16:55:25,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:25,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3150 transitions. [2021-12-14 16:55:25,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 55.26315789473684) internal successors, (3150), 57 states have internal predecessors, (3150), 0 states have call successors, (0), 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 16:55:25,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 86.0) internal successors, (4988), 58 states have internal predecessors, (4988), 0 states have call successors, (0), 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 16:55:25,966 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 86.0) internal successors, (4988), 58 states have internal predecessors, (4988), 0 states have call successors, (0), 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 16:55:25,966 INFO L186 Difference]: Start difference. First operand has 612 places, 1206 transitions, 30227 flow. Second operand 57 states and 3150 transitions. [2021-12-14 16:55:25,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 1355 transitions, 36038 flow [2021-12-14 16:55:26,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 1355 transitions, 35692 flow, removed 55 selfloop flow, removed 23 redundant places. [2021-12-14 16:55:26,940 INFO L242 Difference]: Finished difference. Result has 658 places, 1248 transitions, 33266 flow [2021-12-14 16:55:26,941 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=29915, PETRI_DIFFERENCE_MINUEND_PLACES=586, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=814, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=33266, PETRI_PLACES=658, PETRI_TRANSITIONS=1248} [2021-12-14 16:55:26,942 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 582 predicate places. [2021-12-14 16:55:26,942 INFO L470 AbstractCegarLoop]: Abstraction has has 658 places, 1248 transitions, 33266 flow [2021-12-14 16:55:26,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 16:55:26,942 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:26,942 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:55:26,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-14 16:55:27,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-14 16:55:27,180 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:27,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:27,180 INFO L85 PathProgramCache]: Analyzing trace with hash 782615355, now seen corresponding path program 16 times [2021-12-14 16:55:27,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:27,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163849878] [2021-12-14 16:55:27,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:27,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:27,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:27,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163849878] [2021-12-14 16:55:27,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163849878] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:55:27,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732686415] [2021-12-14 16:55:27,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 16:55:27,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:55:27,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:55:27,321 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:55:27,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-14 16:55:27,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 16:55:27,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:55:27,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:55:27,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:55:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:27,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:55:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:27,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732686415] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:55:27,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:55:27,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-14 16:55:27,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490584846] [2021-12-14 16:55:27,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:55:27,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 16:55:27,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:27,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 16:55:27,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 16:55:27,916 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-14 16:55:27,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 658 places, 1248 transitions, 33266 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 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 16:55:27,917 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:27,917 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-14 16:55:27,918 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:29,956 INFO L129 PetriNetUnfolder]: 999/3020 cut-off events. [2021-12-14 16:55:29,957 INFO L130 PetriNetUnfolder]: For 100520/100526 co-relation queries the response was YES. [2021-12-14 16:55:29,993 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32179 conditions, 3020 events. 999/3020 cut-off events. For 100520/100526 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 26218 event pairs, 60 based on Foata normal form. 1/3014 useless extension candidates. Maximal degree in co-relation 32019. Up to 1047 conditions per place. [2021-12-14 16:55:30,011 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 541 selfloop transitions, 727 changer transitions 16/1325 dead transitions. [2021-12-14 16:55:30,011 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 694 places, 1325 transitions, 37139 flow [2021-12-14 16:55:30,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-14 16:55:30,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-12-14 16:55:30,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2269 transitions. [2021-12-14 16:55:30,013 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6435053885422575 [2021-12-14 16:55:30,013 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2269 transitions. [2021-12-14 16:55:30,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2269 transitions. [2021-12-14 16:55:30,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:30,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2269 transitions. [2021-12-14 16:55:30,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 55.34146341463415) internal successors, (2269), 41 states have internal predecessors, (2269), 0 states have call successors, (0), 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 16:55:30,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 86.0) internal successors, (3612), 42 states have internal predecessors, (3612), 0 states have call successors, (0), 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 16:55:30,018 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 86.0) internal successors, (3612), 42 states have internal predecessors, (3612), 0 states have call successors, (0), 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 16:55:30,018 INFO L186 Difference]: Start difference. First operand has 658 places, 1248 transitions, 33266 flow. Second operand 41 states and 2269 transitions. [2021-12-14 16:55:30,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 694 places, 1325 transitions, 37139 flow [2021-12-14 16:55:31,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 662 places, 1325 transitions, 36192 flow, removed 148 selfloop flow, removed 32 redundant places. [2021-12-14 16:55:31,104 INFO L242 Difference]: Finished difference. Result has 666 places, 1251 transitions, 33917 flow [2021-12-14 16:55:31,105 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=32330, PETRI_DIFFERENCE_MINUEND_PLACES=622, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=723, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=33917, PETRI_PLACES=666, PETRI_TRANSITIONS=1251} [2021-12-14 16:55:31,106 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 590 predicate places. [2021-12-14 16:55:31,106 INFO L470 AbstractCegarLoop]: Abstraction has has 666 places, 1251 transitions, 33917 flow [2021-12-14 16:55:31,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 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 16:55:31,106 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:31,106 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:55:31,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-14 16:55:31,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:55:31,323 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:31,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:31,324 INFO L85 PathProgramCache]: Analyzing trace with hash -357427169, now seen corresponding path program 17 times [2021-12-14 16:55:31,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:31,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129923536] [2021-12-14 16:55:31,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:31,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:31,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:31,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:31,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129923536] [2021-12-14 16:55:31,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129923536] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:55:31,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755038266] [2021-12-14 16:55:31,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 16:55:31,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:55:31,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:55:31,511 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:55:31,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-14 16:55:31,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 16:55:31,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:55:31,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 16:55:31,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:55:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:31,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:55:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:55:32,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755038266] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:55:32,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:55:32,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2021-12-14 16:55:32,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865544047] [2021-12-14 16:55:32,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:55:32,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-14 16:55:32,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:32,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-14 16:55:32,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-12-14 16:55:32,309 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-14 16:55:32,310 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 1251 transitions, 33917 flow. Second operand has 31 states, 31 states have (on average 52.903225806451616) internal successors, (1640), 31 states have internal predecessors, (1640), 0 states have call successors, (0), 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 16:55:32,310 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:32,310 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-14 16:55:32,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand