./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/security.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/security.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 417dec4be084b2867b601c43d125afd61f7d3912bd17641ca10c0f094ab6abe0 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:55:45,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:55:45,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:55:45,682 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:55:45,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:55:45,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:55:45,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:55:45,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:55:45,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:55:45,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:55:45,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:55:45,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:55:45,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:55:45,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:55:45,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:55:45,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:55:45,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:55:45,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:55:45,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:55:45,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:55:45,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:55:45,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:55:45,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:55:45,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:55:45,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:55:45,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:55:45,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:55:45,702 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:55:45,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:55:45,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:55:45,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:55:45,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:55:45,704 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:55:45,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:55:45,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:55:45,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:55:45,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:55:45,707 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:55:45,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:55:45,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:55:45,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:55:45,709 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:55:45,723 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:55:45,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:55:45,724 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:55:45,724 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:55:45,724 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:55:45,724 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:55:45,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:55:45,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:55:45,725 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:55:45,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:55:45,725 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:55:45,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:55:45,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:55:45,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:55:45,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:55:45,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:55:45,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:55:45,726 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:55:45,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:55:45,727 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:55:45,727 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:55:45,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:55:45,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:55:45,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:55:45,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:55:45,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:55:45,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:55:45,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:55:45,729 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:55:45,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:55:45,729 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:55:45,729 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:55:45,729 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:55:45,729 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:55:45,729 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 417dec4be084b2867b601c43d125afd61f7d3912bd17641ca10c0f094ab6abe0 [2021-12-14 16:55:45,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:55:45,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:55:45,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:55:45,942 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:55:45,942 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:55:45,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/security.wvr.c [2021-12-14 16:55:45,983 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adf2fd2ca/1ac4e6c782e941c79d32b4d8e6c34c12/FLAG211fe8ff2 [2021-12-14 16:55:46,340 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:55:46,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/security.wvr.c [2021-12-14 16:55:46,350 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adf2fd2ca/1ac4e6c782e941c79d32b4d8e6c34c12/FLAG211fe8ff2 [2021-12-14 16:55:46,770 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adf2fd2ca/1ac4e6c782e941c79d32b4d8e6c34c12 [2021-12-14 16:55:46,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:55:46,776 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:55:46,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:55:46,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:55:46,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:55:46,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:55:46" (1/1) ... [2021-12-14 16:55:46,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6294ca80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:46, skipping insertion in model container [2021-12-14 16:55:46,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:55:46" (1/1) ... [2021-12-14 16:55:46,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:55:46,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:55:46,947 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/security.wvr.c[1931,1944] [2021-12-14 16:55:46,949 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:55:46,954 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:55:46,970 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/security.wvr.c[1931,1944] [2021-12-14 16:55:46,970 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:55:46,979 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:55:46,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:46 WrapperNode [2021-12-14 16:55:46,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:55:46,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:55:46,980 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:55:46,980 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:55:46,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:46" (1/1) ... [2021-12-14 16:55:46,989 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:46" (1/1) ... [2021-12-14 16:55:47,000 INFO L137 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2021-12-14 16:55:47,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:55:47,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:55:47,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:55:47,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:55:47,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:46" (1/1) ... [2021-12-14 16:55:47,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:46" (1/1) ... [2021-12-14 16:55:47,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:46" (1/1) ... [2021-12-14 16:55:47,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:46" (1/1) ... [2021-12-14 16:55:47,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:46" (1/1) ... [2021-12-14 16:55:47,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:46" (1/1) ... [2021-12-14 16:55:47,018 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:46" (1/1) ... [2021-12-14 16:55:47,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:55:47,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:55:47,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:55:47,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:55:47,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:46" (1/1) ... [2021-12-14 16:55:47,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:55:47,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:55:47,045 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 16:55:47,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 16:55:47,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:55:47,084 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-14 16:55:47,084 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-14 16:55:47,084 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-14 16:55:47,084 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-14 16:55:47,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:55:47,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 16:55:47,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 16:55:47,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:55:47,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:55:47,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 16:55:47,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 16:55:47,086 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 16:55:47,148 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:55:47,149 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:55:47,256 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:55:47,261 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:55:47,268 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 16:55:47,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:55:47 BoogieIcfgContainer [2021-12-14 16:55:47,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:55:47,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:55:47,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:55:47,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:55:47,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:55:46" (1/3) ... [2021-12-14 16:55:47,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3955c3e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:55:47, skipping insertion in model container [2021-12-14 16:55:47,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:55:46" (2/3) ... [2021-12-14 16:55:47,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3955c3e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:55:47, skipping insertion in model container [2021-12-14 16:55:47,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:55:47" (3/3) ... [2021-12-14 16:55:47,289 INFO L111 eAbstractionObserver]: Analyzing ICFG security.wvr.c [2021-12-14 16:55:47,292 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-14 16:55:47,292 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:55:47,292 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 16:55:47,292 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-14 16:55:47,326 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,326 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,326 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,326 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,326 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,327 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,327 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,327 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,327 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,327 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,327 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,327 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,328 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,328 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,332 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,332 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,332 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,332 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,333 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,333 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,333 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,333 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,334 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,334 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,336 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,336 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,336 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,348 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,348 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,349 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:55:47,353 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-14 16:55:47,389 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:55:47,397 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 16:55:47,397 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-14 16:55:47,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 81 transitions, 178 flow [2021-12-14 16:55:47,458 INFO L129 PetriNetUnfolder]: 3/79 cut-off events. [2021-12-14 16:55:47,459 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-14 16:55:47,461 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 3/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2021-12-14 16:55:47,461 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 81 transitions, 178 flow [2021-12-14 16:55:47,465 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 70 transitions, 152 flow [2021-12-14 16:55:47,507 INFO L129 PetriNetUnfolder]: 3/69 cut-off events. [2021-12-14 16:55:47,507 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-14 16:55:47,507 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:47,508 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 16:55:47,509 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:47,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:47,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1803071327, now seen corresponding path program 1 times [2021-12-14 16:55:47,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:47,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030175499] [2021-12-14 16:55:47,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:47,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:47,964 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 16:55:47,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:47,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030175499] [2021-12-14 16:55:47,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030175499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:47,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:47,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:55:47,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630250936] [2021-12-14 16:55:47,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:47,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:55:47,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:48,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:55:48,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:55:48,009 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-14 16:55:48,014 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 152 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:48,015 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:48,015 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-14 16:55:48,016 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:48,287 INFO L129 PetriNetUnfolder]: 32/219 cut-off events. [2021-12-14 16:55:48,288 INFO L130 PetriNetUnfolder]: For 57/60 co-relation queries the response was YES. [2021-12-14 16:55:48,288 INFO L84 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 219 events. 32/219 cut-off events. For 57/60 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 894 event pairs, 11 based on Foata normal form. 5/212 useless extension candidates. Maximal degree in co-relation 170. Up to 47 conditions per place. [2021-12-14 16:55:48,290 INFO L132 encePairwiseOnDemand]: 70/81 looper letters, 34 selfloop transitions, 2 changer transitions 24/106 dead transitions. [2021-12-14 16:55:48,290 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 106 transitions, 377 flow [2021-12-14 16:55:48,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:55:48,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-14 16:55:48,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 906 transitions. [2021-12-14 16:55:48,302 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.745679012345679 [2021-12-14 16:55:48,303 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 906 transitions. [2021-12-14 16:55:48,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 906 transitions. [2021-12-14 16:55:48,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:48,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 906 transitions. [2021-12-14 16:55:48,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 60.4) internal successors, (906), 15 states have internal predecessors, (906), 0 states have call successors, (0), 0 states 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 16:55:48,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 81.0) internal successors, (1296), 16 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states 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 16:55:48,317 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 81.0) internal successors, (1296), 16 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states 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 16:55:48,319 INFO L186 Difference]: Start difference. First operand has 74 places, 70 transitions, 152 flow. Second operand 15 states and 906 transitions. [2021-12-14 16:55:48,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 106 transitions, 377 flow [2021-12-14 16:55:48,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 106 transitions, 347 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-14 16:55:48,324 INFO L242 Difference]: Finished difference. Result has 95 places, 69 transitions, 175 flow [2021-12-14 16:55:48,325 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=175, PETRI_PLACES=95, PETRI_TRANSITIONS=69} [2021-12-14 16:55:48,327 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 21 predicate places. [2021-12-14 16:55:48,328 INFO L470 AbstractCegarLoop]: Abstraction has has 95 places, 69 transitions, 175 flow [2021-12-14 16:55:48,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:48,328 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:48,328 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 16:55:48,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:55:48,329 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:48,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:48,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1262948190, now seen corresponding path program 1 times [2021-12-14 16:55:48,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:48,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477573543] [2021-12-14 16:55:48,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:48,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:48,484 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 16:55:48,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:48,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477573543] [2021-12-14 16:55:48,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477573543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:48,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:48,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:55:48,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362303909] [2021-12-14 16:55:48,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:48,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:55:48,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:48,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:55:48,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:55:48,489 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 81 [2021-12-14 16:55:48,490 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 69 transitions, 175 flow. Second operand has 8 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 16:55:48,490 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:48,490 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 81 [2021-12-14 16:55:48,490 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:48,634 INFO L129 PetriNetUnfolder]: 21/184 cut-off events. [2021-12-14 16:55:48,635 INFO L130 PetriNetUnfolder]: For 99/103 co-relation queries the response was YES. [2021-12-14 16:55:48,635 INFO L84 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 184 events. 21/184 cut-off events. For 99/103 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 647 event pairs, 8 based on Foata normal form. 1/178 useless extension candidates. Maximal degree in co-relation 336. Up to 39 conditions per place. [2021-12-14 16:55:48,636 INFO L132 encePairwiseOnDemand]: 74/81 looper letters, 37 selfloop transitions, 3 changer transitions 6/94 dead transitions. [2021-12-14 16:55:48,636 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 94 transitions, 379 flow [2021-12-14 16:55:48,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:55:48,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-14 16:55:48,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 511 transitions. [2021-12-14 16:55:48,638 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7885802469135802 [2021-12-14 16:55:48,638 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 511 transitions. [2021-12-14 16:55:48,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 511 transitions. [2021-12-14 16:55:48,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:48,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 511 transitions. [2021-12-14 16:55:48,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 63.875) internal successors, (511), 8 states have internal predecessors, (511), 0 states have call successors, (0), 0 states 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 16:55:48,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 81.0) internal successors, (729), 9 states have internal predecessors, (729), 0 states have call successors, (0), 0 states 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 16:55:48,641 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 81.0) internal successors, (729), 9 states have internal predecessors, (729), 0 states have call successors, (0), 0 states 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 16:55:48,641 INFO L186 Difference]: Start difference. First operand has 95 places, 69 transitions, 175 flow. Second operand 8 states and 511 transitions. [2021-12-14 16:55:48,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 94 transitions, 379 flow [2021-12-14 16:55:48,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 94 transitions, 314 flow, removed 32 selfloop flow, removed 10 redundant places. [2021-12-14 16:55:48,644 INFO L242 Difference]: Finished difference. Result has 86 places, 71 transitions, 183 flow [2021-12-14 16:55:48,644 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=183, PETRI_PLACES=86, PETRI_TRANSITIONS=71} [2021-12-14 16:55:48,645 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 12 predicate places. [2021-12-14 16:55:48,645 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 71 transitions, 183 flow [2021-12-14 16:55:48,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 16:55:48,645 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:48,646 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 16:55:48,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:55:48,646 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:48,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:48,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1033469356, now seen corresponding path program 2 times [2021-12-14 16:55:48,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:48,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526531132] [2021-12-14 16:55:48,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:48,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:48,762 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 16:55:48,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:48,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526531132] [2021-12-14 16:55:48,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526531132] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:48,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:48,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:55:48,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134894513] [2021-12-14 16:55:48,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:48,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:55:48,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:48,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:55:48,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:55:48,765 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 81 [2021-12-14 16:55:48,766 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 71 transitions, 183 flow. Second operand has 8 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 16:55:48,766 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:48,766 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 81 [2021-12-14 16:55:48,766 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:48,873 INFO L129 PetriNetUnfolder]: 25/241 cut-off events. [2021-12-14 16:55:48,873 INFO L130 PetriNetUnfolder]: For 111/115 co-relation queries the response was YES. [2021-12-14 16:55:48,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 241 events. 25/241 cut-off events. For 111/115 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1129 event pairs, 16 based on Foata normal form. 1/233 useless extension candidates. Maximal degree in co-relation 427. Up to 61 conditions per place. [2021-12-14 16:55:48,875 INFO L132 encePairwiseOnDemand]: 74/81 looper letters, 34 selfloop transitions, 4 changer transitions 7/93 dead transitions. [2021-12-14 16:55:48,875 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 93 transitions, 366 flow [2021-12-14 16:55:48,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:55:48,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-14 16:55:48,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 505 transitions. [2021-12-14 16:55:48,876 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.779320987654321 [2021-12-14 16:55:48,876 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 505 transitions. [2021-12-14 16:55:48,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 505 transitions. [2021-12-14 16:55:48,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:48,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 505 transitions. [2021-12-14 16:55:48,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states 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 16:55:48,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 81.0) internal successors, (729), 9 states have internal predecessors, (729), 0 states have call successors, (0), 0 states 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 16:55:48,879 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 81.0) internal successors, (729), 9 states have internal predecessors, (729), 0 states have call successors, (0), 0 states 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 16:55:48,879 INFO L186 Difference]: Start difference. First operand has 86 places, 71 transitions, 183 flow. Second operand 8 states and 505 transitions. [2021-12-14 16:55:48,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 93 transitions, 366 flow [2021-12-14 16:55:48,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 93 transitions, 347 flow, removed 8 selfloop flow, removed 4 redundant places. [2021-12-14 16:55:48,882 INFO L242 Difference]: Finished difference. Result has 92 places, 72 transitions, 206 flow [2021-12-14 16:55:48,882 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=206, PETRI_PLACES=92, PETRI_TRANSITIONS=72} [2021-12-14 16:55:48,882 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 18 predicate places. [2021-12-14 16:55:48,883 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 72 transitions, 206 flow [2021-12-14 16:55:48,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 16:55:48,883 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:48,883 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:55:48,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:55:48,884 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:48,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:48,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1244957747, now seen corresponding path program 2 times [2021-12-14 16:55:48,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:48,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435844994] [2021-12-14 16:55:48,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:48,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:48,988 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 16:55:48,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:48,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435844994] [2021-12-14 16:55:48,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435844994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:48,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:48,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:55:48,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237779944] [2021-12-14 16:55:48,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:48,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:55:48,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:48,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:55:48,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:55:48,992 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-14 16:55:48,992 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 72 transitions, 206 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:48,992 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:48,992 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-14 16:55:48,992 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:49,116 INFO L129 PetriNetUnfolder]: 28/290 cut-off events. [2021-12-14 16:55:49,116 INFO L130 PetriNetUnfolder]: For 250/251 co-relation queries the response was YES. [2021-12-14 16:55:49,117 INFO L84 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 290 events. 28/290 cut-off events. For 250/251 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1530 event pairs, 5 based on Foata normal form. 2/280 useless extension candidates. Maximal degree in co-relation 563. Up to 65 conditions per place. [2021-12-14 16:55:49,118 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 38 selfloop transitions, 6 changer transitions 8/98 dead transitions. [2021-12-14 16:55:49,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 98 transitions, 438 flow [2021-12-14 16:55:49,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:55:49,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:55:49,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 549 transitions. [2021-12-14 16:55:49,120 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7530864197530864 [2021-12-14 16:55:49,120 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 549 transitions. [2021-12-14 16:55:49,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 549 transitions. [2021-12-14 16:55:49,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:49,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 549 transitions. [2021-12-14 16:55:49,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 61.0) internal successors, (549), 9 states have internal predecessors, (549), 0 states have call successors, (0), 0 states 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 16:55:49,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:49,122 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:49,123 INFO L186 Difference]: Start difference. First operand has 92 places, 72 transitions, 206 flow. Second operand 9 states and 549 transitions. [2021-12-14 16:55:49,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 98 transitions, 438 flow [2021-12-14 16:55:49,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 98 transitions, 406 flow, removed 15 selfloop flow, removed 5 redundant places. [2021-12-14 16:55:49,126 INFO L242 Difference]: Finished difference. Result has 97 places, 74 transitions, 243 flow [2021-12-14 16:55:49,126 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=243, PETRI_PLACES=97, PETRI_TRANSITIONS=74} [2021-12-14 16:55:49,126 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 23 predicate places. [2021-12-14 16:55:49,127 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 74 transitions, 243 flow [2021-12-14 16:55:49,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:49,127 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:49,127 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 16:55:49,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:55:49,127 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:49,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:49,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1661894565, now seen corresponding path program 3 times [2021-12-14 16:55:49,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:49,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602763812] [2021-12-14 16:55:49,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:49,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:49,228 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 16:55:49,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:49,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602763812] [2021-12-14 16:55:49,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602763812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:49,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:49,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:55:49,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306405217] [2021-12-14 16:55:49,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:49,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:55:49,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:49,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:55:49,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:55:49,231 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-14 16:55:49,232 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 74 transitions, 243 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:49,232 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:49,232 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-14 16:55:49,232 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:49,386 INFO L129 PetriNetUnfolder]: 30/343 cut-off events. [2021-12-14 16:55:49,386 INFO L130 PetriNetUnfolder]: For 415/416 co-relation queries the response was YES. [2021-12-14 16:55:49,387 INFO L84 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 343 events. 30/343 cut-off events. For 415/416 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2027 event pairs, 23 based on Foata normal form. 2/332 useless extension candidates. Maximal degree in co-relation 704. Up to 62 conditions per place. [2021-12-14 16:55:49,387 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 47 selfloop transitions, 4 changer transitions 9/106 dead transitions. [2021-12-14 16:55:49,388 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 106 transitions, 523 flow [2021-12-14 16:55:49,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:55:49,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:55:49,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 558 transitions. [2021-12-14 16:55:49,389 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7654320987654321 [2021-12-14 16:55:49,389 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 558 transitions. [2021-12-14 16:55:49,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 558 transitions. [2021-12-14 16:55:49,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:49,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 558 transitions. [2021-12-14 16:55:49,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.0) internal successors, (558), 9 states have internal predecessors, (558), 0 states have call successors, (0), 0 states 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 16:55:49,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:49,392 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:49,392 INFO L186 Difference]: Start difference. First operand has 97 places, 74 transitions, 243 flow. Second operand 9 states and 558 transitions. [2021-12-14 16:55:49,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 106 transitions, 523 flow [2021-12-14 16:55:49,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 106 transitions, 488 flow, removed 12 selfloop flow, removed 5 redundant places. [2021-12-14 16:55:49,396 INFO L242 Difference]: Finished difference. Result has 104 places, 76 transitions, 272 flow [2021-12-14 16:55:49,396 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=272, PETRI_PLACES=104, PETRI_TRANSITIONS=76} [2021-12-14 16:55:49,397 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 30 predicate places. [2021-12-14 16:55:49,397 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 76 transitions, 272 flow [2021-12-14 16:55:49,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:49,397 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:49,398 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 16:55:49,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:55:49,398 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:49,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:49,398 INFO L85 PathProgramCache]: Analyzing trace with hash 407443089, now seen corresponding path program 4 times [2021-12-14 16:55:49,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:49,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71319155] [2021-12-14 16:55:49,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:49,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:49,512 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 16:55:49,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:49,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71319155] [2021-12-14 16:55:49,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71319155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:49,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:49,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:55:49,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875670775] [2021-12-14 16:55:49,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:49,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:55:49,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:49,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:55:49,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:55:49,515 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-14 16:55:49,516 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 76 transitions, 272 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:49,516 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:49,516 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-14 16:55:49,516 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:49,652 INFO L129 PetriNetUnfolder]: 27/352 cut-off events. [2021-12-14 16:55:49,652 INFO L130 PetriNetUnfolder]: For 511/513 co-relation queries the response was YES. [2021-12-14 16:55:49,653 INFO L84 FinitePrefix]: Finished finitePrefix Result has 814 conditions, 352 events. 27/352 cut-off events. For 511/513 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2126 event pairs, 7 based on Foata normal form. 2/343 useless extension candidates. Maximal degree in co-relation 754. Up to 73 conditions per place. [2021-12-14 16:55:49,654 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 51 selfloop transitions, 6 changer transitions 10/113 dead transitions. [2021-12-14 16:55:49,654 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 113 transitions, 600 flow [2021-12-14 16:55:49,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:55:49,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:55:49,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 561 transitions. [2021-12-14 16:55:49,655 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7695473251028807 [2021-12-14 16:55:49,655 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 561 transitions. [2021-12-14 16:55:49,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 561 transitions. [2021-12-14 16:55:49,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:49,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 561 transitions. [2021-12-14 16:55:49,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.333333333333336) internal successors, (561), 9 states have internal predecessors, (561), 0 states have call successors, (0), 0 states 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 16:55:49,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:49,658 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:49,658 INFO L186 Difference]: Start difference. First operand has 104 places, 76 transitions, 272 flow. Second operand 9 states and 561 transitions. [2021-12-14 16:55:49,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 113 transitions, 600 flow [2021-12-14 16:55:49,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 113 transitions, 559 flow, removed 19 selfloop flow, removed 5 redundant places. [2021-12-14 16:55:49,662 INFO L242 Difference]: Finished difference. Result has 110 places, 79 transitions, 330 flow [2021-12-14 16:55:49,662 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=330, PETRI_PLACES=110, PETRI_TRANSITIONS=79} [2021-12-14 16:55:49,662 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 36 predicate places. [2021-12-14 16:55:49,663 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 79 transitions, 330 flow [2021-12-14 16:55:49,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:49,663 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:49,663 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 16:55:49,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:55:49,664 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:49,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:49,664 INFO L85 PathProgramCache]: Analyzing trace with hash 741952778, now seen corresponding path program 3 times [2021-12-14 16:55:49,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:49,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809086839] [2021-12-14 16:55:49,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:49,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:49,792 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 16:55:49,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:49,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809086839] [2021-12-14 16:55:49,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809086839] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:49,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:49,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:55:49,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986990967] [2021-12-14 16:55:49,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:49,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:55:49,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:49,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:55:49,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:55:49,798 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 81 [2021-12-14 16:55:49,798 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 79 transitions, 330 flow. Second operand has 8 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 16:55:49,798 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:49,798 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 81 [2021-12-14 16:55:49,798 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:49,909 INFO L129 PetriNetUnfolder]: 22/306 cut-off events. [2021-12-14 16:55:49,909 INFO L130 PetriNetUnfolder]: For 582/589 co-relation queries the response was YES. [2021-12-14 16:55:49,910 INFO L84 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 306 events. 22/306 cut-off events. For 582/589 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1676 event pairs, 19 based on Foata normal form. 1/298 useless extension candidates. Maximal degree in co-relation 675. Up to 70 conditions per place. [2021-12-14 16:55:49,911 INFO L132 encePairwiseOnDemand]: 74/81 looper letters, 35 selfloop transitions, 3 changer transitions 10/97 dead transitions. [2021-12-14 16:55:49,911 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 97 transitions, 518 flow [2021-12-14 16:55:49,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:55:49,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-14 16:55:49,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 505 transitions. [2021-12-14 16:55:49,912 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.779320987654321 [2021-12-14 16:55:49,913 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 505 transitions. [2021-12-14 16:55:49,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 505 transitions. [2021-12-14 16:55:49,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:49,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 505 transitions. [2021-12-14 16:55:49,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states 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 16:55:49,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 81.0) internal successors, (729), 9 states have internal predecessors, (729), 0 states have call successors, (0), 0 states 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 16:55:49,915 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 81.0) internal successors, (729), 9 states have internal predecessors, (729), 0 states have call successors, (0), 0 states 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 16:55:49,915 INFO L186 Difference]: Start difference. First operand has 110 places, 79 transitions, 330 flow. Second operand 8 states and 505 transitions. [2021-12-14 16:55:49,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 97 transitions, 518 flow [2021-12-14 16:55:49,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 97 transitions, 488 flow, removed 14 selfloop flow, removed 4 redundant places. [2021-12-14 16:55:49,919 INFO L242 Difference]: Finished difference. Result has 114 places, 77 transitions, 302 flow [2021-12-14 16:55:49,919 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=302, PETRI_PLACES=114, PETRI_TRANSITIONS=77} [2021-12-14 16:55:49,920 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 40 predicate places. [2021-12-14 16:55:49,920 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 77 transitions, 302 flow [2021-12-14 16:55:49,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 16:55:49,920 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:49,920 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 16:55:49,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:55:49,921 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:49,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:49,921 INFO L85 PathProgramCache]: Analyzing trace with hash -848346999, now seen corresponding path program 5 times [2021-12-14 16:55:49,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:49,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217251520] [2021-12-14 16:55:49,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:49,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:50,038 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 16:55:50,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:50,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217251520] [2021-12-14 16:55:50,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217251520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:50,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:50,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:55:50,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220827313] [2021-12-14 16:55:50,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:50,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:55:50,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:50,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:55:50,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:55:50,041 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-14 16:55:50,041 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 77 transitions, 302 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:50,041 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:50,041 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-14 16:55:50,041 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:50,167 INFO L129 PetriNetUnfolder]: 23/301 cut-off events. [2021-12-14 16:55:50,167 INFO L130 PetriNetUnfolder]: For 481/482 co-relation queries the response was YES. [2021-12-14 16:55:50,168 INFO L84 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 301 events. 23/301 cut-off events. For 481/482 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1659 event pairs, 19 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 657. Up to 62 conditions per place. [2021-12-14 16:55:50,169 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 42 selfloop transitions, 6 changer transitions 8/102 dead transitions. [2021-12-14 16:55:50,169 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 102 transitions, 532 flow [2021-12-14 16:55:50,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:55:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:55:50,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 555 transitions. [2021-12-14 16:55:50,170 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7613168724279835 [2021-12-14 16:55:50,170 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 555 transitions. [2021-12-14 16:55:50,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 555 transitions. [2021-12-14 16:55:50,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:50,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 555 transitions. [2021-12-14 16:55:50,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 61.666666666666664) internal successors, (555), 9 states have internal predecessors, (555), 0 states have call successors, (0), 0 states 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 16:55:50,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:50,173 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:50,173 INFO L186 Difference]: Start difference. First operand has 114 places, 77 transitions, 302 flow. Second operand 9 states and 555 transitions. [2021-12-14 16:55:50,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 102 transitions, 532 flow [2021-12-14 16:55:50,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 102 transitions, 493 flow, removed 18 selfloop flow, removed 7 redundant places. [2021-12-14 16:55:50,176 INFO L242 Difference]: Finished difference. Result has 113 places, 78 transitions, 318 flow [2021-12-14 16:55:50,177 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=318, PETRI_PLACES=113, PETRI_TRANSITIONS=78} [2021-12-14 16:55:50,178 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 39 predicate places. [2021-12-14 16:55:50,179 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 78 transitions, 318 flow [2021-12-14 16:55:50,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:50,179 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:50,179 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 16:55:50,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:55:50,179 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:50,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:50,180 INFO L85 PathProgramCache]: Analyzing trace with hash -252513187, now seen corresponding path program 6 times [2021-12-14 16:55:50,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:50,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138010305] [2021-12-14 16:55:50,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:50,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:50,267 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 16:55:50,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:50,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138010305] [2021-12-14 16:55:50,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138010305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:50,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:50,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:55:50,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940821888] [2021-12-14 16:55:50,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:50,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:55:50,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:50,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:55:50,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:55:50,270 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-14 16:55:50,270 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 78 transitions, 318 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:50,270 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:50,270 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-14 16:55:50,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:50,410 INFO L129 PetriNetUnfolder]: 22/282 cut-off events. [2021-12-14 16:55:50,410 INFO L130 PetriNetUnfolder]: For 489/491 co-relation queries the response was YES. [2021-12-14 16:55:50,411 INFO L84 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 282 events. 22/282 cut-off events. For 489/491 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1501 event pairs, 20 based on Foata normal form. 2/274 useless extension candidates. Maximal degree in co-relation 630. Up to 62 conditions per place. [2021-12-14 16:55:50,411 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 34 selfloop transitions, 2 changer transitions 13/95 dead transitions. [2021-12-14 16:55:50,411 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 95 transitions, 499 flow [2021-12-14 16:55:50,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:55:50,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:55:50,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 548 transitions. [2021-12-14 16:55:50,413 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7517146776406035 [2021-12-14 16:55:50,413 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 548 transitions. [2021-12-14 16:55:50,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 548 transitions. [2021-12-14 16:55:50,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:50,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 548 transitions. [2021-12-14 16:55:50,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.888888888888886) internal successors, (548), 9 states have internal predecessors, (548), 0 states have call successors, (0), 0 states 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 16:55:50,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:50,416 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:50,416 INFO L186 Difference]: Start difference. First operand has 113 places, 78 transitions, 318 flow. Second operand 9 states and 548 transitions. [2021-12-14 16:55:50,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 95 transitions, 499 flow [2021-12-14 16:55:50,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 95 transitions, 465 flow, removed 11 selfloop flow, removed 7 redundant places. [2021-12-14 16:55:50,419 INFO L242 Difference]: Finished difference. Result has 115 places, 74 transitions, 264 flow [2021-12-14 16:55:50,419 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=264, PETRI_PLACES=115, PETRI_TRANSITIONS=74} [2021-12-14 16:55:50,419 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 41 predicate places. [2021-12-14 16:55:50,420 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 74 transitions, 264 flow [2021-12-14 16:55:50,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:50,420 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:50,420 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 16:55:50,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:55:50,420 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:50,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:50,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1111681351, now seen corresponding path program 7 times [2021-12-14 16:55:50,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:50,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134528220] [2021-12-14 16:55:50,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:50,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:50,505 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 16:55:50,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:50,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134528220] [2021-12-14 16:55:50,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134528220] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:50,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:50,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:55:50,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730805403] [2021-12-14 16:55:50,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:50,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:55:50,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:50,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:55:50,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:55:50,507 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-14 16:55:50,508 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 74 transitions, 264 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:50,508 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:50,508 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-14 16:55:50,508 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:50,636 INFO L129 PetriNetUnfolder]: 20/236 cut-off events. [2021-12-14 16:55:50,637 INFO L130 PetriNetUnfolder]: For 368/368 co-relation queries the response was YES. [2021-12-14 16:55:50,637 INFO L84 FinitePrefix]: Finished finitePrefix Result has 567 conditions, 236 events. 20/236 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1112 event pairs, 2 based on Foata normal form. 1/230 useless extension candidates. Maximal degree in co-relation 519. Up to 45 conditions per place. [2021-12-14 16:55:50,638 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 33 selfloop transitions, 5 changer transitions 9/93 dead transitions. [2021-12-14 16:55:50,638 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 93 transitions, 446 flow [2021-12-14 16:55:50,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:55:50,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:55:50,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 547 transitions. [2021-12-14 16:55:50,640 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7503429355281207 [2021-12-14 16:55:50,640 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 547 transitions. [2021-12-14 16:55:50,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 547 transitions. [2021-12-14 16:55:50,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:50,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 547 transitions. [2021-12-14 16:55:50,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.77777777777778) internal successors, (547), 9 states have internal predecessors, (547), 0 states have call successors, (0), 0 states 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 16:55:50,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:50,642 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:50,642 INFO L186 Difference]: Start difference. First operand has 115 places, 74 transitions, 264 flow. Second operand 9 states and 547 transitions. [2021-12-14 16:55:50,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 93 transitions, 446 flow [2021-12-14 16:55:50,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 93 transitions, 403 flow, removed 18 selfloop flow, removed 10 redundant places. [2021-12-14 16:55:50,645 INFO L242 Difference]: Finished difference. Result has 108 places, 73 transitions, 251 flow [2021-12-14 16:55:50,646 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=251, PETRI_PLACES=108, PETRI_TRANSITIONS=73} [2021-12-14 16:55:50,646 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 34 predicate places. [2021-12-14 16:55:50,646 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 73 transitions, 251 flow [2021-12-14 16:55:50,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:50,647 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:50,647 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 16:55:50,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:55:50,647 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:50,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:50,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1364185607, now seen corresponding path program 8 times [2021-12-14 16:55:50,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:50,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114570331] [2021-12-14 16:55:50,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:50,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:50,744 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 16:55:50,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:50,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114570331] [2021-12-14 16:55:50,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114570331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:50,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:50,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:55:50,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152592938] [2021-12-14 16:55:50,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:50,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:55:50,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:50,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:55:50,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:55:50,746 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-14 16:55:50,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 73 transitions, 251 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:50,747 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:50,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-14 16:55:50,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:50,892 INFO L129 PetriNetUnfolder]: 18/211 cut-off events. [2021-12-14 16:55:50,892 INFO L130 PetriNetUnfolder]: For 274/274 co-relation queries the response was YES. [2021-12-14 16:55:50,892 INFO L84 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 211 events. 18/211 cut-off events. For 274/274 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 870 event pairs, 2 based on Foata normal form. 1/205 useless extension candidates. Maximal degree in co-relation 455. Up to 45 conditions per place. [2021-12-14 16:55:50,893 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 33 selfloop transitions, 2 changer transitions 11/92 dead transitions. [2021-12-14 16:55:50,893 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 92 transitions, 432 flow [2021-12-14 16:55:50,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:55:50,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:55:50,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 548 transitions. [2021-12-14 16:55:50,895 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7517146776406035 [2021-12-14 16:55:50,895 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 548 transitions. [2021-12-14 16:55:50,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 548 transitions. [2021-12-14 16:55:50,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:50,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 548 transitions. [2021-12-14 16:55:50,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.888888888888886) internal successors, (548), 9 states have internal predecessors, (548), 0 states have call successors, (0), 0 states 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 16:55:50,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:50,897 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:50,898 INFO L186 Difference]: Start difference. First operand has 108 places, 73 transitions, 251 flow. Second operand 9 states and 548 transitions. [2021-12-14 16:55:50,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 92 transitions, 432 flow [2021-12-14 16:55:50,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 92 transitions, 381 flow, removed 13 selfloop flow, removed 12 redundant places. [2021-12-14 16:55:50,900 INFO L242 Difference]: Finished difference. Result has 104 places, 70 transitions, 201 flow [2021-12-14 16:55:50,900 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=201, PETRI_PLACES=104, PETRI_TRANSITIONS=70} [2021-12-14 16:55:50,901 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 30 predicate places. [2021-12-14 16:55:50,901 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 70 transitions, 201 flow [2021-12-14 16:55:50,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:50,901 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:50,901 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 16:55:50,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:55:50,902 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:50,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:50,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1784837601, now seen corresponding path program 9 times [2021-12-14 16:55:50,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:50,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157919258] [2021-12-14 16:55:50,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:50,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:50,980 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 16:55:50,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:50,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157919258] [2021-12-14 16:55:50,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157919258] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:50,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:50,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:55:50,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768535296] [2021-12-14 16:55:50,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:50,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:55:50,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:50,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:55:50,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:55:50,982 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-14 16:55:50,983 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 70 transitions, 201 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:50,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:50,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-14 16:55:50,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:51,105 INFO L129 PetriNetUnfolder]: 17/200 cut-off events. [2021-12-14 16:55:51,105 INFO L130 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2021-12-14 16:55:51,106 INFO L84 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 200 events. 17/200 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 789 event pairs, 2 based on Foata normal form. 1/195 useless extension candidates. Maximal degree in co-relation 405. Up to 40 conditions per place. [2021-12-14 16:55:51,106 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 28 selfloop transitions, 5 changer transitions 8/87 dead transitions. [2021-12-14 16:55:51,106 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 87 transitions, 360 flow [2021-12-14 16:55:51,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:55:51,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:55:51,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 543 transitions. [2021-12-14 16:55:51,108 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7448559670781894 [2021-12-14 16:55:51,108 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 543 transitions. [2021-12-14 16:55:51,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 543 transitions. [2021-12-14 16:55:51,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:51,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 543 transitions. [2021-12-14 16:55:51,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.333333333333336) internal successors, (543), 9 states have internal predecessors, (543), 0 states have call successors, (0), 0 states 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 16:55:51,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:51,110 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:51,110 INFO L186 Difference]: Start difference. First operand has 104 places, 70 transitions, 201 flow. Second operand 9 states and 543 transitions. [2021-12-14 16:55:51,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 87 transitions, 360 flow [2021-12-14 16:55:51,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 87 transitions, 327 flow, removed 9 selfloop flow, removed 11 redundant places. [2021-12-14 16:55:51,112 INFO L242 Difference]: Finished difference. Result has 99 places, 70 transitions, 199 flow [2021-12-14 16:55:51,112 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=199, PETRI_PLACES=99, PETRI_TRANSITIONS=70} [2021-12-14 16:55:51,113 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 25 predicate places. [2021-12-14 16:55:51,113 INFO L470 AbstractCegarLoop]: Abstraction has has 99 places, 70 transitions, 199 flow [2021-12-14 16:55:51,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:51,113 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:51,113 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 16:55:51,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:55:51,114 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:51,114 INFO L85 PathProgramCache]: Analyzing trace with hash -322699621, now seen corresponding path program 10 times [2021-12-14 16:55:51,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:51,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373057989] [2021-12-14 16:55:51,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:51,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:51,194 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 16:55:51,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:51,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373057989] [2021-12-14 16:55:51,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373057989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:51,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:51,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:55:51,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970775136] [2021-12-14 16:55:51,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:51,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:55:51,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:51,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:55:51,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:55:51,196 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-14 16:55:51,196 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 70 transitions, 199 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:51,197 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:51,197 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-14 16:55:51,197 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:51,317 INFO L129 PetriNetUnfolder]: 17/183 cut-off events. [2021-12-14 16:55:51,318 INFO L130 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2021-12-14 16:55:51,318 INFO L84 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 183 events. 17/183 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 679 event pairs, 2 based on Foata normal form. 2/178 useless extension candidates. Maximal degree in co-relation 372. Up to 38 conditions per place. [2021-12-14 16:55:51,319 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 25 selfloop transitions, 3 changer transitions 13/85 dead transitions. [2021-12-14 16:55:51,319 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 85 transitions, 344 flow [2021-12-14 16:55:51,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:55:51,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:55:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 542 transitions. [2021-12-14 16:55:51,320 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7434842249657064 [2021-12-14 16:55:51,320 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 542 transitions. [2021-12-14 16:55:51,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 542 transitions. [2021-12-14 16:55:51,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:51,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 542 transitions. [2021-12-14 16:55:51,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.22222222222222) internal successors, (542), 9 states have internal predecessors, (542), 0 states have call successors, (0), 0 states 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 16:55:51,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:51,322 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:51,322 INFO L186 Difference]: Start difference. First operand has 99 places, 70 transitions, 199 flow. Second operand 9 states and 542 transitions. [2021-12-14 16:55:51,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 85 transitions, 344 flow [2021-12-14 16:55:51,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 85 transitions, 316 flow, removed 8 selfloop flow, removed 8 redundant places. [2021-12-14 16:55:51,324 INFO L242 Difference]: Finished difference. Result has 99 places, 66 transitions, 171 flow [2021-12-14 16:55:51,324 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=171, PETRI_PLACES=99, PETRI_TRANSITIONS=66} [2021-12-14 16:55:51,325 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 25 predicate places. [2021-12-14 16:55:51,325 INFO L470 AbstractCegarLoop]: Abstraction has has 99 places, 66 transitions, 171 flow [2021-12-14 16:55:51,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:51,325 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:51,325 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 16:55:51,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:55:51,326 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:51,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:51,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1253106300, now seen corresponding path program 1 times [2021-12-14 16:55:51,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:51,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570507969] [2021-12-14 16:55:51,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:51,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:51,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:51,436 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 16:55:51,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:51,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570507969] [2021-12-14 16:55:51,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570507969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:51,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:51,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:55:51,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338969442] [2021-12-14 16:55:51,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:51,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:55:51,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:51,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:55:51,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:55:51,438 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-14 16:55:51,439 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 66 transitions, 171 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:51,439 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:51,439 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-14 16:55:51,439 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:51,635 INFO L129 PetriNetUnfolder]: 26/209 cut-off events. [2021-12-14 16:55:51,635 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2021-12-14 16:55:51,636 INFO L84 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 209 events. 26/209 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 812 event pairs, 0 based on Foata normal form. 3/209 useless extension candidates. Maximal degree in co-relation 440. Up to 30 conditions per place. [2021-12-14 16:55:51,636 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 36 selfloop transitions, 3 changer transitions 21/102 dead transitions. [2021-12-14 16:55:51,636 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 102 transitions, 496 flow [2021-12-14 16:55:51,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:55:51,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-14 16:55:51,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 813 transitions. [2021-12-14 16:55:51,637 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.716931216931217 [2021-12-14 16:55:51,638 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 813 transitions. [2021-12-14 16:55:51,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 813 transitions. [2021-12-14 16:55:51,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:51,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 813 transitions. [2021-12-14 16:55:51,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 states 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 16:55:51,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 81.0) internal successors, (1215), 15 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states 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 16:55:51,640 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 81.0) internal successors, (1215), 15 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states 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 16:55:51,640 INFO L186 Difference]: Start difference. First operand has 99 places, 66 transitions, 171 flow. Second operand 14 states and 813 transitions. [2021-12-14 16:55:51,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 102 transitions, 496 flow [2021-12-14 16:55:51,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 102 transitions, 407 flow, removed 30 selfloop flow, removed 9 redundant places. [2021-12-14 16:55:51,642 INFO L242 Difference]: Finished difference. Result has 96 places, 66 transitions, 182 flow [2021-12-14 16:55:51,642 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=182, PETRI_PLACES=96, PETRI_TRANSITIONS=66} [2021-12-14 16:55:51,643 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 22 predicate places. [2021-12-14 16:55:51,643 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 66 transitions, 182 flow [2021-12-14 16:55:51,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:51,643 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:51,643 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 16:55:51,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:55:51,643 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:51,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:51,643 INFO L85 PathProgramCache]: Analyzing trace with hash 706603769, now seen corresponding path program 1 times [2021-12-14 16:55:51,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:51,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974515927] [2021-12-14 16:55:51,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:51,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:51,753 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 16:55:51,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:51,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974515927] [2021-12-14 16:55:51,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974515927] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:51,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:51,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:55:51,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647406360] [2021-12-14 16:55:51,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:51,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:55:51,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:51,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:55:51,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:55:51,755 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-14 16:55:51,755 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 66 transitions, 182 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:51,755 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:51,755 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-14 16:55:51,755 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:51,869 INFO L129 PetriNetUnfolder]: 18/196 cut-off events. [2021-12-14 16:55:51,869 INFO L130 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2021-12-14 16:55:51,869 INFO L84 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 196 events. 18/196 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 745 event pairs, 8 based on Foata normal form. 1/190 useless extension candidates. Maximal degree in co-relation 407. Up to 50 conditions per place. [2021-12-14 16:55:51,870 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 35 selfloop transitions, 3 changer transitions 7/89 dead transitions. [2021-12-14 16:55:51,870 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 89 transitions, 390 flow [2021-12-14 16:55:51,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:55:51,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:55:51,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 548 transitions. [2021-12-14 16:55:51,871 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7517146776406035 [2021-12-14 16:55:51,871 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 548 transitions. [2021-12-14 16:55:51,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 548 transitions. [2021-12-14 16:55:51,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:51,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 548 transitions. [2021-12-14 16:55:51,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.888888888888886) internal successors, (548), 9 states have internal predecessors, (548), 0 states have call successors, (0), 0 states 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 16:55:51,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:51,873 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:51,873 INFO L186 Difference]: Start difference. First operand has 96 places, 66 transitions, 182 flow. Second operand 9 states and 548 transitions. [2021-12-14 16:55:51,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 89 transitions, 390 flow [2021-12-14 16:55:51,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 89 transitions, 322 flow, removed 28 selfloop flow, removed 12 redundant places. [2021-12-14 16:55:51,874 INFO L242 Difference]: Finished difference. Result has 90 places, 68 transitions, 194 flow [2021-12-14 16:55:51,875 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=194, PETRI_PLACES=90, PETRI_TRANSITIONS=68} [2021-12-14 16:55:51,875 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 16 predicate places. [2021-12-14 16:55:51,875 INFO L470 AbstractCegarLoop]: Abstraction has has 90 places, 68 transitions, 194 flow [2021-12-14 16:55:51,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:51,875 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:51,875 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 16:55:51,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:55:51,875 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:51,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:51,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1352411004, now seen corresponding path program 2 times [2021-12-14 16:55:51,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:51,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890510524] [2021-12-14 16:55:51,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:51,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:51,981 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 16:55:51,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:51,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890510524] [2021-12-14 16:55:51,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890510524] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:51,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:51,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:55:51,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907825807] [2021-12-14 16:55:51,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:51,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:55:51,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:51,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:55:51,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:55:51,982 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-14 16:55:51,983 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 68 transitions, 194 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:51,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:51,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-14 16:55:51,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:52,248 INFO L129 PetriNetUnfolder]: 28/370 cut-off events. [2021-12-14 16:55:52,248 INFO L130 PetriNetUnfolder]: For 233/236 co-relation queries the response was YES. [2021-12-14 16:55:52,249 INFO L84 FinitePrefix]: Finished finitePrefix Result has 814 conditions, 370 events. 28/370 cut-off events. For 233/236 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2217 event pairs, 4 based on Foata normal form. 5/369 useless extension candidates. Maximal degree in co-relation 762. Up to 52 conditions per place. [2021-12-14 16:55:52,250 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 62 selfloop transitions, 9 changer transitions 13/126 dead transitions. [2021-12-14 16:55:52,250 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 126 transitions, 624 flow [2021-12-14 16:55:52,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 16:55:52,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-14 16:55:52,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 945 transitions. [2021-12-14 16:55:52,251 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7291666666666666 [2021-12-14 16:55:52,251 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 945 transitions. [2021-12-14 16:55:52,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 945 transitions. [2021-12-14 16:55:52,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:52,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 945 transitions. [2021-12-14 16:55:52,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 59.0625) internal successors, (945), 16 states have internal predecessors, (945), 0 states have call successors, (0), 0 states 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 16:55:52,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 81.0) internal successors, (1377), 17 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states 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 16:55:52,255 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 81.0) internal successors, (1377), 17 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states 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 16:55:52,256 INFO L186 Difference]: Start difference. First operand has 90 places, 68 transitions, 194 flow. Second operand 16 states and 945 transitions. [2021-12-14 16:55:52,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 126 transitions, 624 flow [2021-12-14 16:55:52,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 126 transitions, 573 flow, removed 25 selfloop flow, removed 5 redundant places. [2021-12-14 16:55:52,258 INFO L242 Difference]: Finished difference. Result has 110 places, 75 transitions, 286 flow [2021-12-14 16:55:52,259 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=286, PETRI_PLACES=110, PETRI_TRANSITIONS=75} [2021-12-14 16:55:52,259 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 36 predicate places. [2021-12-14 16:55:52,259 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 75 transitions, 286 flow [2021-12-14 16:55:52,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:52,260 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:52,260 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 16:55:52,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:55:52,260 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:52,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:52,261 INFO L85 PathProgramCache]: Analyzing trace with hash -631538826, now seen corresponding path program 3 times [2021-12-14 16:55:52,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:52,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404160339] [2021-12-14 16:55:52,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:52,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:52,341 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 16:55:52,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:52,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404160339] [2021-12-14 16:55:52,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404160339] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:52,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:52,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:55:52,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725272008] [2021-12-14 16:55:52,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:52,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:55:52,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:52,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:55:52,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:55:52,343 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-14 16:55:52,344 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 75 transitions, 286 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:52,344 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:52,344 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-14 16:55:52,344 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:52,495 INFO L129 PetriNetUnfolder]: 23/361 cut-off events. [2021-12-14 16:55:52,496 INFO L130 PetriNetUnfolder]: For 507/510 co-relation queries the response was YES. [2021-12-14 16:55:52,496 INFO L84 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 361 events. 23/361 cut-off events. For 507/510 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2202 event pairs, 3 based on Foata normal form. 2/355 useless extension candidates. Maximal degree in co-relation 859. Up to 84 conditions per place. [2021-12-14 16:55:52,497 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 33 selfloop transitions, 10 changer transitions 12/97 dead transitions. [2021-12-14 16:55:52,497 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 97 transitions, 534 flow [2021-12-14 16:55:52,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:55:52,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:55:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 583 transitions. [2021-12-14 16:55:52,498 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7197530864197531 [2021-12-14 16:55:52,499 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 583 transitions. [2021-12-14 16:55:52,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 583 transitions. [2021-12-14 16:55:52,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:52,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 583 transitions. [2021-12-14 16:55:52,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.3) internal successors, (583), 10 states have internal predecessors, (583), 0 states have call successors, (0), 0 states 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 16:55:52,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:52,501 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:52,501 INFO L186 Difference]: Start difference. First operand has 110 places, 75 transitions, 286 flow. Second operand 10 states and 583 transitions. [2021-12-14 16:55:52,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 97 transitions, 534 flow [2021-12-14 16:55:52,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 97 transitions, 504 flow, removed 10 selfloop flow, removed 8 redundant places. [2021-12-14 16:55:52,505 INFO L242 Difference]: Finished difference. Result has 111 places, 75 transitions, 305 flow [2021-12-14 16:55:52,506 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=305, PETRI_PLACES=111, PETRI_TRANSITIONS=75} [2021-12-14 16:55:52,506 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 37 predicate places. [2021-12-14 16:55:52,506 INFO L470 AbstractCegarLoop]: Abstraction has has 111 places, 75 transitions, 305 flow [2021-12-14 16:55:52,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:52,506 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:52,507 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 16:55:52,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:55:52,507 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:52,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:52,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1379330042, now seen corresponding path program 4 times [2021-12-14 16:55:52,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:52,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809924424] [2021-12-14 16:55:52,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:52,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:52,592 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 16:55:52,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:52,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809924424] [2021-12-14 16:55:52,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809924424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:52,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:52,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:55:52,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367506241] [2021-12-14 16:55:52,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:52,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:55:52,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:52,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:55:52,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:55:52,594 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-14 16:55:52,595 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 75 transitions, 305 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:52,595 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:52,595 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-14 16:55:52,595 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:52,763 INFO L129 PetriNetUnfolder]: 28/408 cut-off events. [2021-12-14 16:55:52,764 INFO L130 PetriNetUnfolder]: For 887/890 co-relation queries the response was YES. [2021-12-14 16:55:52,765 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1110 conditions, 408 events. 28/408 cut-off events. For 887/890 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2623 event pairs, 8 based on Foata normal form. 4/405 useless extension candidates. Maximal degree in co-relation 1038. Up to 119 conditions per place. [2021-12-14 16:55:52,766 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 50 selfloop transitions, 6 changer transitions 11/109 dead transitions. [2021-12-14 16:55:52,766 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 109 transitions, 724 flow [2021-12-14 16:55:52,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:55:52,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:55:52,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 593 transitions. [2021-12-14 16:55:52,767 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7320987654320987 [2021-12-14 16:55:52,767 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 593 transitions. [2021-12-14 16:55:52,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 593 transitions. [2021-12-14 16:55:52,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:52,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 593 transitions. [2021-12-14 16:55:52,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.3) internal successors, (593), 10 states have internal predecessors, (593), 0 states have call successors, (0), 0 states 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 16:55:52,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:52,769 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:52,769 INFO L186 Difference]: Start difference. First operand has 111 places, 75 transitions, 305 flow. Second operand 10 states and 593 transitions. [2021-12-14 16:55:52,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 109 transitions, 724 flow [2021-12-14 16:55:52,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 109 transitions, 657 flow, removed 11 selfloop flow, removed 8 redundant places. [2021-12-14 16:55:52,772 INFO L242 Difference]: Finished difference. Result has 114 places, 77 transitions, 327 flow [2021-12-14 16:55:52,773 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=327, PETRI_PLACES=114, PETRI_TRANSITIONS=77} [2021-12-14 16:55:52,773 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 40 predicate places. [2021-12-14 16:55:52,773 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 77 transitions, 327 flow [2021-12-14 16:55:52,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:52,773 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:52,773 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 16:55:52,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:55:52,775 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:52,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:52,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1732848334, now seen corresponding path program 5 times [2021-12-14 16:55:52,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:52,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089534434] [2021-12-14 16:55:52,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:52,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:52,858 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 16:55:52,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:52,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089534434] [2021-12-14 16:55:52,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089534434] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:52,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:52,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:55:52,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634021653] [2021-12-14 16:55:52,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:52,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:55:52,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:52,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:55:52,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:55:52,862 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-14 16:55:52,862 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 77 transitions, 327 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:52,862 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:52,862 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-14 16:55:52,863 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:53,028 INFO L129 PetriNetUnfolder]: 24/436 cut-off events. [2021-12-14 16:55:53,028 INFO L130 PetriNetUnfolder]: For 894/900 co-relation queries the response was YES. [2021-12-14 16:55:53,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1162 conditions, 436 events. 24/436 cut-off events. For 894/900 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2975 event pairs, 12 based on Foata normal form. 4/429 useless extension candidates. Maximal degree in co-relation 1083. Up to 76 conditions per place. [2021-12-14 16:55:53,030 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 64 selfloop transitions, 8 changer transitions 9/123 dead transitions. [2021-12-14 16:55:53,030 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 123 transitions, 779 flow [2021-12-14 16:55:53,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:55:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:55:53,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 610 transitions. [2021-12-14 16:55:53,031 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7530864197530864 [2021-12-14 16:55:53,031 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 610 transitions. [2021-12-14 16:55:53,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 610 transitions. [2021-12-14 16:55:53,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:53,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 610 transitions. [2021-12-14 16:55:53,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.0) internal successors, (610), 10 states have internal predecessors, (610), 0 states have call successors, (0), 0 states 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 16:55:53,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:53,034 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:53,034 INFO L186 Difference]: Start difference. First operand has 114 places, 77 transitions, 327 flow. Second operand 10 states and 610 transitions. [2021-12-14 16:55:53,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 123 transitions, 779 flow [2021-12-14 16:55:53,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 123 transitions, 723 flow, removed 25 selfloop flow, removed 6 redundant places. [2021-12-14 16:55:53,037 INFO L242 Difference]: Finished difference. Result has 120 places, 81 transitions, 401 flow [2021-12-14 16:55:53,038 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=401, PETRI_PLACES=120, PETRI_TRANSITIONS=81} [2021-12-14 16:55:53,038 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 46 predicate places. [2021-12-14 16:55:53,038 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 81 transitions, 401 flow [2021-12-14 16:55:53,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:53,038 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:53,039 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 16:55:53,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:55:53,039 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:53,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:53,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1744902709, now seen corresponding path program 2 times [2021-12-14 16:55:53,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:53,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557858429] [2021-12-14 16:55:53,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:53,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:53,107 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 16:55:53,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:53,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557858429] [2021-12-14 16:55:53,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557858429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:53,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:53,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:55:53,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481780496] [2021-12-14 16:55:53,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:53,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:55:53,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:53,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:55:53,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:55:53,110 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-14 16:55:53,110 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 81 transitions, 401 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:53,110 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:53,110 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-14 16:55:53,111 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:53,233 INFO L129 PetriNetUnfolder]: 21/419 cut-off events. [2021-12-14 16:55:53,233 INFO L130 PetriNetUnfolder]: For 977/983 co-relation queries the response was YES. [2021-12-14 16:55:53,234 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1155 conditions, 419 events. 21/419 cut-off events. For 977/983 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2780 event pairs, 19 based on Foata normal form. 1/411 useless extension candidates. Maximal degree in co-relation 1073. Up to 100 conditions per place. [2021-12-14 16:55:53,234 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 49 selfloop transitions, 7 changer transitions 7/109 dead transitions. [2021-12-14 16:55:53,235 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 109 transitions, 702 flow [2021-12-14 16:55:53,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:55:53,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:55:53,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 552 transitions. [2021-12-14 16:55:53,236 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.757201646090535 [2021-12-14 16:55:53,236 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 552 transitions. [2021-12-14 16:55:53,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 552 transitions. [2021-12-14 16:55:53,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:53,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 552 transitions. [2021-12-14 16:55:53,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 61.333333333333336) internal successors, (552), 9 states have internal predecessors, (552), 0 states have call successors, (0), 0 states 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 16:55:53,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:53,243 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:53,243 INFO L186 Difference]: Start difference. First operand has 120 places, 81 transitions, 401 flow. Second operand 9 states and 552 transitions. [2021-12-14 16:55:53,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 109 transitions, 702 flow [2021-12-14 16:55:53,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 109 transitions, 658 flow, removed 19 selfloop flow, removed 5 redundant places. [2021-12-14 16:55:53,248 INFO L242 Difference]: Finished difference. Result has 127 places, 84 transitions, 450 flow [2021-12-14 16:55:53,248 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=450, PETRI_PLACES=127, PETRI_TRANSITIONS=84} [2021-12-14 16:55:53,248 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 53 predicate places. [2021-12-14 16:55:53,248 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 84 transitions, 450 flow [2021-12-14 16:55:53,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:53,249 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:53,249 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 16:55:53,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:55:53,249 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:53,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:53,249 INFO L85 PathProgramCache]: Analyzing trace with hash 307404330, now seen corresponding path program 6 times [2021-12-14 16:55:53,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:53,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996352284] [2021-12-14 16:55:53,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:53,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:53,323 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 16:55:53,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:53,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996352284] [2021-12-14 16:55:53,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996352284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:53,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:53,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:55:53,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285210005] [2021-12-14 16:55:53,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:53,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:55:53,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:53,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:55:53,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:55:53,325 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-14 16:55:53,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 84 transitions, 450 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:53,326 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:53,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-14 16:55:53,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:53,461 INFO L129 PetriNetUnfolder]: 21/442 cut-off events. [2021-12-14 16:55:53,462 INFO L130 PetriNetUnfolder]: For 1205/1217 co-relation queries the response was YES. [2021-12-14 16:55:53,463 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1251 conditions, 442 events. 21/442 cut-off events. For 1205/1217 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3004 event pairs, 10 based on Foata normal form. 3/437 useless extension candidates. Maximal degree in co-relation 1160. Up to 135 conditions per place. [2021-12-14 16:55:53,464 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 43 selfloop transitions, 16 changer transitions 10/111 dead transitions. [2021-12-14 16:55:53,464 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 111 transitions, 797 flow [2021-12-14 16:55:53,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:55:53,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:55:53,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 588 transitions. [2021-12-14 16:55:53,465 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.725925925925926 [2021-12-14 16:55:53,465 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 588 transitions. [2021-12-14 16:55:53,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 588 transitions. [2021-12-14 16:55:53,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:53,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 588 transitions. [2021-12-14 16:55:53,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.8) internal successors, (588), 10 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:55:53,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:53,467 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:53,468 INFO L186 Difference]: Start difference. First operand has 127 places, 84 transitions, 450 flow. Second operand 10 states and 588 transitions. [2021-12-14 16:55:53,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 111 transitions, 797 flow [2021-12-14 16:55:53,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 111 transitions, 761 flow, removed 16 selfloop flow, removed 4 redundant places. [2021-12-14 16:55:53,472 INFO L242 Difference]: Finished difference. Result has 136 places, 87 transitions, 526 flow [2021-12-14 16:55:53,472 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=526, PETRI_PLACES=136, PETRI_TRANSITIONS=87} [2021-12-14 16:55:53,473 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 62 predicate places. [2021-12-14 16:55:53,473 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 87 transitions, 526 flow [2021-12-14 16:55:53,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:53,473 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:53,473 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 16:55:53,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:55:53,473 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:53,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:53,474 INFO L85 PathProgramCache]: Analyzing trace with hash 260750753, now seen corresponding path program 3 times [2021-12-14 16:55:53,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:53,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816671641] [2021-12-14 16:55:53,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:53,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:53,543 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 16:55:53,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:53,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816671641] [2021-12-14 16:55:53,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816671641] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:53,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:53,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:55:53,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149577136] [2021-12-14 16:55:53,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:53,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:55:53,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:53,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:55:53,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:55:53,545 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-14 16:55:53,545 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 87 transitions, 526 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:53,546 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:53,546 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-14 16:55:53,546 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:53,676 INFO L129 PetriNetUnfolder]: 18/451 cut-off events. [2021-12-14 16:55:53,676 INFO L130 PetriNetUnfolder]: For 1490/1504 co-relation queries the response was YES. [2021-12-14 16:55:53,677 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1307 conditions, 451 events. 18/451 cut-off events. For 1490/1504 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3153 event pairs, 4 based on Foata normal form. 5/450 useless extension candidates. Maximal degree in co-relation 1217. Up to 125 conditions per place. [2021-12-14 16:55:53,678 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 47 selfloop transitions, 12 changer transitions 13/118 dead transitions. [2021-12-14 16:55:53,678 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 118 transitions, 940 flow [2021-12-14 16:55:53,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:55:53,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:55:53,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 549 transitions. [2021-12-14 16:55:53,679 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7530864197530864 [2021-12-14 16:55:53,679 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 549 transitions. [2021-12-14 16:55:53,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 549 transitions. [2021-12-14 16:55:53,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:53,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 549 transitions. [2021-12-14 16:55:53,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 61.0) internal successors, (549), 9 states have internal predecessors, (549), 0 states have call successors, (0), 0 states 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 16:55:53,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:53,681 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:53,681 INFO L186 Difference]: Start difference. First operand has 136 places, 87 transitions, 526 flow. Second operand 9 states and 549 transitions. [2021-12-14 16:55:53,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 118 transitions, 940 flow [2021-12-14 16:55:53,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 118 transitions, 880 flow, removed 21 selfloop flow, removed 5 redundant places. [2021-12-14 16:55:53,687 INFO L242 Difference]: Finished difference. Result has 142 places, 89 transitions, 574 flow [2021-12-14 16:55:53,687 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=574, PETRI_PLACES=142, PETRI_TRANSITIONS=89} [2021-12-14 16:55:53,687 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 68 predicate places. [2021-12-14 16:55:53,687 INFO L470 AbstractCegarLoop]: Abstraction has has 142 places, 89 transitions, 574 flow [2021-12-14 16:55:53,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:53,688 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:53,688 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 16:55:53,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 16:55:53,688 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:53,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:53,688 INFO L85 PathProgramCache]: Analyzing trace with hash -658061558, now seen corresponding path program 7 times [2021-12-14 16:55:53,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:53,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841132796] [2021-12-14 16:55:53,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:53,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:53,768 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 16:55:53,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:53,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841132796] [2021-12-14 16:55:53,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841132796] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:53,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:53,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:55:53,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390955366] [2021-12-14 16:55:53,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:53,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:55:53,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:53,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:55:53,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:55:53,770 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-14 16:55:53,771 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 89 transitions, 574 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:53,771 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:53,771 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-14 16:55:53,771 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:53,932 INFO L129 PetriNetUnfolder]: 17/418 cut-off events. [2021-12-14 16:55:53,932 INFO L130 PetriNetUnfolder]: For 1553/1567 co-relation queries the response was YES. [2021-12-14 16:55:53,934 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1251 conditions, 418 events. 17/418 cut-off events. For 1553/1567 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2820 event pairs, 11 based on Foata normal form. 5/415 useless extension candidates. Maximal degree in co-relation 1158. Up to 86 conditions per place. [2021-12-14 16:55:53,935 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 59 selfloop transitions, 12 changer transitions 11/124 dead transitions. [2021-12-14 16:55:53,935 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 124 transitions, 1038 flow [2021-12-14 16:55:53,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:55:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:55:53,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 597 transitions. [2021-12-14 16:55:53,936 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.737037037037037 [2021-12-14 16:55:53,936 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 597 transitions. [2021-12-14 16:55:53,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 597 transitions. [2021-12-14 16:55:53,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:53,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 597 transitions. [2021-12-14 16:55:53,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.7) internal successors, (597), 10 states have internal predecessors, (597), 0 states have call successors, (0), 0 states 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 16:55:53,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:53,938 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:53,938 INFO L186 Difference]: Start difference. First operand has 142 places, 89 transitions, 574 flow. Second operand 10 states and 597 transitions. [2021-12-14 16:55:53,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 124 transitions, 1038 flow [2021-12-14 16:55:53,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 124 transitions, 981 flow, removed 20 selfloop flow, removed 5 redundant places. [2021-12-14 16:55:53,944 INFO L242 Difference]: Finished difference. Result has 151 places, 94 transitions, 675 flow [2021-12-14 16:55:53,944 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=675, PETRI_PLACES=151, PETRI_TRANSITIONS=94} [2021-12-14 16:55:53,945 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 77 predicate places. [2021-12-14 16:55:53,945 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 94 transitions, 675 flow [2021-12-14 16:55:53,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:53,945 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:53,945 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 16:55:53,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-14 16:55:53,946 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:53,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:53,946 INFO L85 PathProgramCache]: Analyzing trace with hash 432307051, now seen corresponding path program 4 times [2021-12-14 16:55:53,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:53,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582439306] [2021-12-14 16:55:53,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:53,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:54,020 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 16:55:54,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:54,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582439306] [2021-12-14 16:55:54,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582439306] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:54,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:54,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:55:54,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39091362] [2021-12-14 16:55:54,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:54,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:55:54,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:54,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:55:54,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:55:54,022 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-14 16:55:54,023 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 94 transitions, 675 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:54,023 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:54,023 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-14 16:55:54,023 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:54,161 INFO L129 PetriNetUnfolder]: 17/403 cut-off events. [2021-12-14 16:55:54,161 INFO L130 PetriNetUnfolder]: For 1636/1652 co-relation queries the response was YES. [2021-12-14 16:55:54,162 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1250 conditions, 403 events. 17/403 cut-off events. For 1636/1652 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2658 event pairs, 7 based on Foata normal form. 6/401 useless extension candidates. Maximal degree in co-relation 1162. Up to 124 conditions per place. [2021-12-14 16:55:54,163 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 40 selfloop transitions, 10 changer transitions 19/115 dead transitions. [2021-12-14 16:55:54,163 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 115 transitions, 1043 flow [2021-12-14 16:55:54,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:55:54,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:55:54,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 543 transitions. [2021-12-14 16:55:54,165 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7448559670781894 [2021-12-14 16:55:54,165 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 543 transitions. [2021-12-14 16:55:54,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 543 transitions. [2021-12-14 16:55:54,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:54,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 543 transitions. [2021-12-14 16:55:54,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.333333333333336) internal successors, (543), 9 states have internal predecessors, (543), 0 states have call successors, (0), 0 states 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 16:55:54,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:54,167 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:54,167 INFO L186 Difference]: Start difference. First operand has 151 places, 94 transitions, 675 flow. Second operand 9 states and 543 transitions. [2021-12-14 16:55:54,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 115 transitions, 1043 flow [2021-12-14 16:55:54,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 115 transitions, 1006 flow, removed 17 selfloop flow, removed 5 redundant places. [2021-12-14 16:55:54,174 INFO L242 Difference]: Finished difference. Result has 154 places, 90 transitions, 594 flow [2021-12-14 16:55:54,174 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=594, PETRI_PLACES=154, PETRI_TRANSITIONS=90} [2021-12-14 16:55:54,175 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 80 predicate places. [2021-12-14 16:55:54,175 INFO L470 AbstractCegarLoop]: Abstraction has has 154 places, 90 transitions, 594 flow [2021-12-14 16:55:54,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:54,175 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:54,175 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 16:55:54,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-14 16:55:54,176 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:54,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:54,176 INFO L85 PathProgramCache]: Analyzing trace with hash -881258538, now seen corresponding path program 8 times [2021-12-14 16:55:54,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:54,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092786129] [2021-12-14 16:55:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:54,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:54,265 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 16:55:54,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:54,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092786129] [2021-12-14 16:55:54,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092786129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:54,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:54,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:55:54,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65104328] [2021-12-14 16:55:54,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:54,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:55:54,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:54,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:55:54,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:55:54,267 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-14 16:55:54,268 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 90 transitions, 594 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:54,268 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:54,268 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-14 16:55:54,268 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:54,414 INFO L129 PetriNetUnfolder]: 14/364 cut-off events. [2021-12-14 16:55:54,414 INFO L130 PetriNetUnfolder]: For 1374/1391 co-relation queries the response was YES. [2021-12-14 16:55:54,416 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1103 conditions, 364 events. 14/364 cut-off events. For 1374/1391 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2264 event pairs, 4 based on Foata normal form. 5/363 useless extension candidates. Maximal degree in co-relation 1015. Up to 109 conditions per place. [2021-12-14 16:55:54,417 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 48 selfloop transitions, 13 changer transitions 13/116 dead transitions. [2021-12-14 16:55:54,417 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 116 transitions, 958 flow [2021-12-14 16:55:54,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:55:54,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:55:54,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 590 transitions. [2021-12-14 16:55:54,419 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7283950617283951 [2021-12-14 16:55:54,419 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 590 transitions. [2021-12-14 16:55:54,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 590 transitions. [2021-12-14 16:55:54,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:54,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 590 transitions. [2021-12-14 16:55:54,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states 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 16:55:54,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:54,421 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:54,421 INFO L186 Difference]: Start difference. First operand has 154 places, 90 transitions, 594 flow. Second operand 10 states and 590 transitions. [2021-12-14 16:55:54,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 116 transitions, 958 flow [2021-12-14 16:55:54,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 116 transitions, 908 flow, removed 18 selfloop flow, removed 8 redundant places. [2021-12-14 16:55:54,433 INFO L242 Difference]: Finished difference. Result has 153 places, 91 transitions, 615 flow [2021-12-14 16:55:54,433 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=615, PETRI_PLACES=153, PETRI_TRANSITIONS=91} [2021-12-14 16:55:54,434 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 79 predicate places. [2021-12-14 16:55:54,434 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 91 transitions, 615 flow [2021-12-14 16:55:54,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:54,434 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:54,435 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 16:55:54,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-14 16:55:54,435 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:54,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:54,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2144980316, now seen corresponding path program 9 times [2021-12-14 16:55:54,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:54,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503573935] [2021-12-14 16:55:54,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:54,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:54,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:54,526 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 16:55:54,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:54,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503573935] [2021-12-14 16:55:54,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503573935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:54,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:54,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:55:54,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038447056] [2021-12-14 16:55:54,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:54,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:55:54,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:54,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:55:54,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:55:54,529 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-14 16:55:54,530 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 91 transitions, 615 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:54,530 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:54,530 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-14 16:55:54,530 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:54,654 INFO L129 PetriNetUnfolder]: 13/346 cut-off events. [2021-12-14 16:55:54,654 INFO L130 PetriNetUnfolder]: For 1285/1299 co-relation queries the response was YES. [2021-12-14 16:55:54,656 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1060 conditions, 346 events. 13/346 cut-off events. For 1285/1299 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2081 event pairs, 5 based on Foata normal form. 6/346 useless extension candidates. Maximal degree in co-relation 978. Up to 109 conditions per place. [2021-12-14 16:55:54,656 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 40 selfloop transitions, 10 changer transitions 17/109 dead transitions. [2021-12-14 16:55:54,656 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 109 transitions, 917 flow [2021-12-14 16:55:54,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:55:54,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:55:54,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 583 transitions. [2021-12-14 16:55:54,661 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7197530864197531 [2021-12-14 16:55:54,661 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 583 transitions. [2021-12-14 16:55:54,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 583 transitions. [2021-12-14 16:55:54,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:54,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 583 transitions. [2021-12-14 16:55:54,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.3) internal successors, (583), 10 states have internal predecessors, (583), 0 states have call successors, (0), 0 states 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 16:55:54,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:54,682 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:54,682 INFO L186 Difference]: Start difference. First operand has 153 places, 91 transitions, 615 flow. Second operand 10 states and 583 transitions. [2021-12-14 16:55:54,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 109 transitions, 917 flow [2021-12-14 16:55:54,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 109 transitions, 875 flow, removed 8 selfloop flow, removed 8 redundant places. [2021-12-14 16:55:54,689 INFO L242 Difference]: Finished difference. Result has 155 places, 88 transitions, 568 flow [2021-12-14 16:55:54,690 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=568, PETRI_PLACES=155, PETRI_TRANSITIONS=88} [2021-12-14 16:55:54,690 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 81 predicate places. [2021-12-14 16:55:54,690 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 88 transitions, 568 flow [2021-12-14 16:55:54,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:54,690 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:54,690 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 16:55:54,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-14 16:55:54,691 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:54,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:54,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1232039598, now seen corresponding path program 10 times [2021-12-14 16:55:54,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:54,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621535597] [2021-12-14 16:55:54,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:54,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:54,781 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 16:55:54,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:54,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621535597] [2021-12-14 16:55:54,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621535597] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:54,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:54,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:55:54,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40714169] [2021-12-14 16:55:54,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:54,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:55:54,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:54,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:55:54,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:55:54,784 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-14 16:55:54,785 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 88 transitions, 568 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:54,785 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:54,785 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-14 16:55:54,785 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:54,922 INFO L129 PetriNetUnfolder]: 13/312 cut-off events. [2021-12-14 16:55:54,922 INFO L130 PetriNetUnfolder]: For 1246/1262 co-relation queries the response was YES. [2021-12-14 16:55:54,923 INFO L84 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 312 events. 13/312 cut-off events. For 1246/1262 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1781 event pairs, 7 based on Foata normal form. 7/314 useless extension candidates. Maximal degree in co-relation 908. Up to 73 conditions per place. [2021-12-14 16:55:54,924 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 46 selfloop transitions, 9 changer transitions 12/109 dead transitions. [2021-12-14 16:55:54,924 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 109 transitions, 878 flow [2021-12-14 16:55:54,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:55:54,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:55:54,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 590 transitions. [2021-12-14 16:55:54,926 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7283950617283951 [2021-12-14 16:55:54,926 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 590 transitions. [2021-12-14 16:55:54,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 590 transitions. [2021-12-14 16:55:54,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:54,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 590 transitions. [2021-12-14 16:55:54,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states 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 16:55:54,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:54,929 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:54,929 INFO L186 Difference]: Start difference. First operand has 155 places, 88 transitions, 568 flow. Second operand 10 states and 590 transitions. [2021-12-14 16:55:54,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 109 transitions, 878 flow [2021-12-14 16:55:54,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 109 transitions, 822 flow, removed 21 selfloop flow, removed 9 redundant places. [2021-12-14 16:55:54,935 INFO L242 Difference]: Finished difference. Result has 151 places, 88 transitions, 576 flow [2021-12-14 16:55:54,935 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=576, PETRI_PLACES=151, PETRI_TRANSITIONS=88} [2021-12-14 16:55:54,935 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 77 predicate places. [2021-12-14 16:55:54,935 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 88 transitions, 576 flow [2021-12-14 16:55:54,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:54,936 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:54,936 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 16:55:54,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-14 16:55:54,936 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:54,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:54,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1022226839, now seen corresponding path program 5 times [2021-12-14 16:55:54,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:54,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126853951] [2021-12-14 16:55:54,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:54,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:55,023 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 16:55:55,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:55,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126853951] [2021-12-14 16:55:55,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126853951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:55,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:55,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:55:55,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644629313] [2021-12-14 16:55:55,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:55,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:55:55,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:55,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:55:55,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:55:55,027 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 81 [2021-12-14 16:55:55,028 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 88 transitions, 576 flow. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:55,028 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:55,028 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 81 [2021-12-14 16:55:55,028 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:55,143 INFO L129 PetriNetUnfolder]: 11/286 cut-off events. [2021-12-14 16:55:55,143 INFO L130 PetriNetUnfolder]: For 1098/1112 co-relation queries the response was YES. [2021-12-14 16:55:55,145 INFO L84 FinitePrefix]: Finished finitePrefix Result has 910 conditions, 286 events. 11/286 cut-off events. For 1098/1112 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1555 event pairs, 8 based on Foata normal form. 6/287 useless extension candidates. Maximal degree in co-relation 844. Up to 86 conditions per place. [2021-12-14 16:55:55,146 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 34 selfloop transitions, 4 changer transitions 20/103 dead transitions. [2021-12-14 16:55:55,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 103 transitions, 832 flow [2021-12-14 16:55:55,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:55:55,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:55:55,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 541 transitions. [2021-12-14 16:55:55,147 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7421124828532236 [2021-12-14 16:55:55,147 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 541 transitions. [2021-12-14 16:55:55,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 541 transitions. [2021-12-14 16:55:55,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:55,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 541 transitions. [2021-12-14 16:55:55,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 60.111111111111114) internal successors, (541), 9 states have internal predecessors, (541), 0 states have call successors, (0), 0 states 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 16:55:55,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:55,149 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 0 states have call successors, (0), 0 states 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 16:55:55,149 INFO L186 Difference]: Start difference. First operand has 151 places, 88 transitions, 576 flow. Second operand 9 states and 541 transitions. [2021-12-14 16:55:55,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 103 transitions, 832 flow [2021-12-14 16:55:55,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 103 transitions, 779 flow, removed 11 selfloop flow, removed 11 redundant places. [2021-12-14 16:55:55,155 INFO L242 Difference]: Finished difference. Result has 149 places, 82 transitions, 452 flow [2021-12-14 16:55:55,155 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=452, PETRI_PLACES=149, PETRI_TRANSITIONS=82} [2021-12-14 16:55:55,155 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 75 predicate places. [2021-12-14 16:55:55,156 INFO L470 AbstractCegarLoop]: Abstraction has has 149 places, 82 transitions, 452 flow [2021-12-14 16:55:55,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 16:55:55,156 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:55,156 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 16:55:55,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-14 16:55:55,156 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:55,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:55,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2140697048, now seen corresponding path program 11 times [2021-12-14 16:55:55,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:55,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964499720] [2021-12-14 16:55:55,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:55,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:55,240 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 16:55:55,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:55,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964499720] [2021-12-14 16:55:55,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964499720] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:55,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:55,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:55:55,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229520972] [2021-12-14 16:55:55,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:55,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:55:55,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:55,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:55:55,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:55:55,243 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-14 16:55:55,244 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 82 transitions, 452 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:55,244 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:55,244 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-14 16:55:55,244 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:55,410 INFO L129 PetriNetUnfolder]: 11/229 cut-off events. [2021-12-14 16:55:55,411 INFO L130 PetriNetUnfolder]: For 725/738 co-relation queries the response was YES. [2021-12-14 16:55:55,411 INFO L84 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 229 events. 11/229 cut-off events. For 725/738 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1031 event pairs, 7 based on Foata normal form. 6/229 useless extension candidates. Maximal degree in co-relation 670. Up to 60 conditions per place. [2021-12-14 16:55:55,412 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 40 selfloop transitions, 6 changer transitions 13/101 dead transitions. [2021-12-14 16:55:55,412 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 101 transitions, 693 flow [2021-12-14 16:55:55,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:55:55,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:55:55,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 589 transitions. [2021-12-14 16:55:55,413 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7271604938271605 [2021-12-14 16:55:55,413 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 589 transitions. [2021-12-14 16:55:55,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 589 transitions. [2021-12-14 16:55:55,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:55,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 589 transitions. [2021-12-14 16:55:55,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.9) internal successors, (589), 10 states have internal predecessors, (589), 0 states have call successors, (0), 0 states 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 16:55:55,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:55,418 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:55,418 INFO L186 Difference]: Start difference. First operand has 149 places, 82 transitions, 452 flow. Second operand 10 states and 589 transitions. [2021-12-14 16:55:55,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 101 transitions, 693 flow [2021-12-14 16:55:55,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 101 transitions, 648 flow, removed 18 selfloop flow, removed 11 redundant places. [2021-12-14 16:55:55,422 INFO L242 Difference]: Finished difference. Result has 140 places, 79 transitions, 403 flow [2021-12-14 16:55:55,423 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=403, PETRI_PLACES=140, PETRI_TRANSITIONS=79} [2021-12-14 16:55:55,424 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 66 predicate places. [2021-12-14 16:55:55,424 INFO L470 AbstractCegarLoop]: Abstraction has has 140 places, 79 transitions, 403 flow [2021-12-14 16:55:55,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:55,425 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:55,425 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 16:55:55,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-14 16:55:55,425 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:55,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:55,425 INFO L85 PathProgramCache]: Analyzing trace with hash 112076268, now seen corresponding path program 12 times [2021-12-14 16:55:55,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:55,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454748378] [2021-12-14 16:55:55,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:55,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:55,524 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 16:55:55,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:55,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454748378] [2021-12-14 16:55:55,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454748378] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:55,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:55,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:55:55,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360344521] [2021-12-14 16:55:55,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:55,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:55:55,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:55,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:55:55,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:55:55,527 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-14 16:55:55,527 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 79 transitions, 403 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:55,527 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:55,527 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-14 16:55:55,527 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:55,688 INFO L129 PetriNetUnfolder]: 10/220 cut-off events. [2021-12-14 16:55:55,688 INFO L130 PetriNetUnfolder]: For 534/545 co-relation queries the response was YES. [2021-12-14 16:55:55,689 INFO L84 FinitePrefix]: Finished finitePrefix Result has 650 conditions, 220 events. 10/220 cut-off events. For 534/545 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 951 event pairs, 7 based on Foata normal form. 5/220 useless extension candidates. Maximal degree in co-relation 617. Up to 60 conditions per place. [2021-12-14 16:55:55,689 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 38 selfloop transitions, 7 changer transitions 11/98 dead transitions. [2021-12-14 16:55:55,690 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 98 transitions, 636 flow [2021-12-14 16:55:55,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:55:55,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:55:55,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 587 transitions. [2021-12-14 16:55:55,691 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7246913580246913 [2021-12-14 16:55:55,691 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 587 transitions. [2021-12-14 16:55:55,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 587 transitions. [2021-12-14 16:55:55,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:55,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 587 transitions. [2021-12-14 16:55:55,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.7) internal successors, (587), 10 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:55:55,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:55,693 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:55,693 INFO L186 Difference]: Start difference. First operand has 140 places, 79 transitions, 403 flow. Second operand 10 states and 587 transitions. [2021-12-14 16:55:55,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 98 transitions, 636 flow [2021-12-14 16:55:55,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 98 transitions, 584 flow, removed 16 selfloop flow, removed 11 redundant places. [2021-12-14 16:55:55,696 INFO L242 Difference]: Finished difference. Result has 137 places, 80 transitions, 415 flow [2021-12-14 16:55:55,697 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=415, PETRI_PLACES=137, PETRI_TRANSITIONS=80} [2021-12-14 16:55:55,697 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 63 predicate places. [2021-12-14 16:55:55,697 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 80 transitions, 415 flow [2021-12-14 16:55:55,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:55,697 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:55,698 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 16:55:55,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-14 16:55:55,698 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:55,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:55,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1443359976, now seen corresponding path program 13 times [2021-12-14 16:55:55,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:55,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837493339] [2021-12-14 16:55:55,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:55,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:55,777 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 16:55:55,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:55,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837493339] [2021-12-14 16:55:55,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837493339] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:55,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:55,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:55:55,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581941795] [2021-12-14 16:55:55,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:55,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:55:55,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:55,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:55:55,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:55:55,779 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-14 16:55:55,780 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 80 transitions, 415 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:55,780 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:55,780 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-14 16:55:55,780 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:55,926 INFO L129 PetriNetUnfolder]: 10/204 cut-off events. [2021-12-14 16:55:55,927 INFO L130 PetriNetUnfolder]: For 458/469 co-relation queries the response was YES. [2021-12-14 16:55:55,927 INFO L84 FinitePrefix]: Finished finitePrefix Result has 603 conditions, 204 events. 10/204 cut-off events. For 458/469 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 837 event pairs, 7 based on Foata normal form. 5/203 useless extension candidates. Maximal degree in co-relation 571. Up to 60 conditions per place. [2021-12-14 16:55:55,928 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 29 selfloop transitions, 3 changer transitions 17/91 dead transitions. [2021-12-14 16:55:55,928 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 91 transitions, 588 flow [2021-12-14 16:55:55,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:55:55,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:55:55,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 580 transitions. [2021-12-14 16:55:55,929 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7160493827160493 [2021-12-14 16:55:55,929 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 580 transitions. [2021-12-14 16:55:55,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 580 transitions. [2021-12-14 16:55:55,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:55,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 580 transitions. [2021-12-14 16:55:55,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.0) internal successors, (580), 10 states have internal predecessors, (580), 0 states have call successors, (0), 0 states 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 16:55:55,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:55,931 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:55,932 INFO L186 Difference]: Start difference. First operand has 137 places, 80 transitions, 415 flow. Second operand 10 states and 580 transitions. [2021-12-14 16:55:55,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 91 transitions, 588 flow [2021-12-14 16:55:55,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 91 transitions, 551 flow, removed 13 selfloop flow, removed 7 redundant places. [2021-12-14 16:55:55,935 INFO L242 Difference]: Finished difference. Result has 138 places, 74 transitions, 331 flow [2021-12-14 16:55:55,935 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=331, PETRI_PLACES=138, PETRI_TRANSITIONS=74} [2021-12-14 16:55:55,936 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 64 predicate places. [2021-12-14 16:55:55,936 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 74 transitions, 331 flow [2021-12-14 16:55:55,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:55,936 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:55,936 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 16:55:55,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-14 16:55:55,937 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:55,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:55,937 INFO L85 PathProgramCache]: Analyzing trace with hash -2036479358, now seen corresponding path program 14 times [2021-12-14 16:55:55,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:55,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853486170] [2021-12-14 16:55:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:55,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:56,020 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 16:55:56,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:56,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853486170] [2021-12-14 16:55:56,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853486170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:56,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:56,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:55:56,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766368018] [2021-12-14 16:55:56,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:56,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:55:56,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:56,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:55:56,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:55:56,022 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-14 16:55:56,023 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 74 transitions, 331 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:56,023 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:56,023 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-14 16:55:56,023 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:56,172 INFO L129 PetriNetUnfolder]: 7/167 cut-off events. [2021-12-14 16:55:56,172 INFO L130 PetriNetUnfolder]: For 325/334 co-relation queries the response was YES. [2021-12-14 16:55:56,173 INFO L84 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 167 events. 7/167 cut-off events. For 325/334 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 567 event pairs, 0 based on Foata normal form. 4/168 useless extension candidates. Maximal degree in co-relation 445. Up to 31 conditions per place. [2021-12-14 16:55:56,173 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 26 selfloop transitions, 10 changer transitions 11/89 dead transitions. [2021-12-14 16:55:56,173 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 89 transitions, 541 flow [2021-12-14 16:55:56,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:55:56,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:55:56,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 577 transitions. [2021-12-14 16:55:56,175 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7123456790123457 [2021-12-14 16:55:56,175 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 577 transitions. [2021-12-14 16:55:56,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 577 transitions. [2021-12-14 16:55:56,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:56,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 577 transitions. [2021-12-14 16:55:56,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 57.7) internal successors, (577), 10 states have internal predecessors, (577), 0 states have call successors, (0), 0 states 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 16:55:56,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:56,177 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:56,178 INFO L186 Difference]: Start difference. First operand has 138 places, 74 transitions, 331 flow. Second operand 10 states and 577 transitions. [2021-12-14 16:55:56,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 89 transitions, 541 flow [2021-12-14 16:55:56,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 89 transitions, 492 flow, removed 16 selfloop flow, removed 13 redundant places. [2021-12-14 16:55:56,180 INFO L242 Difference]: Finished difference. Result has 123 places, 74 transitions, 327 flow [2021-12-14 16:55:56,180 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=327, PETRI_PLACES=123, PETRI_TRANSITIONS=74} [2021-12-14 16:55:56,180 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 49 predicate places. [2021-12-14 16:55:56,181 INFO L470 AbstractCegarLoop]: Abstraction has has 123 places, 74 transitions, 327 flow [2021-12-14 16:55:56,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:56,181 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:56,181 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 16:55:56,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-14 16:55:56,181 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:56,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:56,181 INFO L85 PathProgramCache]: Analyzing trace with hash 635828710, now seen corresponding path program 15 times [2021-12-14 16:55:56,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:56,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942429747] [2021-12-14 16:55:56,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:56,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:56,297 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 16:55:56,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:56,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942429747] [2021-12-14 16:55:56,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942429747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:56,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:56,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:55:56,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850651099] [2021-12-14 16:55:56,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:56,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:55:56,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:56,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:55:56,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:55:56,299 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-14 16:55:56,300 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 74 transitions, 327 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:56,300 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:56,300 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-14 16:55:56,300 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:56,500 INFO L129 PetriNetUnfolder]: 5/192 cut-off events. [2021-12-14 16:55:56,501 INFO L130 PetriNetUnfolder]: For 337/346 co-relation queries the response was YES. [2021-12-14 16:55:56,501 INFO L84 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 192 events. 5/192 cut-off events. For 337/346 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 773 event pairs, 4 based on Foata normal form. 4/193 useless extension candidates. Maximal degree in co-relation 488. Up to 32 conditions per place. [2021-12-14 16:55:56,502 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 41 selfloop transitions, 7 changer transitions 9/99 dead transitions. [2021-12-14 16:55:56,502 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 99 transitions, 571 flow [2021-12-14 16:55:56,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:55:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:55:56,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 590 transitions. [2021-12-14 16:55:56,503 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7283950617283951 [2021-12-14 16:55:56,503 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 590 transitions. [2021-12-14 16:55:56,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 590 transitions. [2021-12-14 16:55:56,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:56,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 590 transitions. [2021-12-14 16:55:56,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states 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 16:55:56,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:56,505 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:56,505 INFO L186 Difference]: Start difference. First operand has 123 places, 74 transitions, 327 flow. Second operand 10 states and 590 transitions. [2021-12-14 16:55:56,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 99 transitions, 571 flow [2021-12-14 16:55:56,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 99 transitions, 515 flow, removed 14 selfloop flow, removed 9 redundant places. [2021-12-14 16:55:56,509 INFO L242 Difference]: Finished difference. Result has 125 places, 76 transitions, 347 flow [2021-12-14 16:55:56,509 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=347, PETRI_PLACES=125, PETRI_TRANSITIONS=76} [2021-12-14 16:55:56,510 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 51 predicate places. [2021-12-14 16:55:56,510 INFO L470 AbstractCegarLoop]: Abstraction has has 125 places, 76 transitions, 347 flow [2021-12-14 16:55:56,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:56,510 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:56,510 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 16:55:56,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-14 16:55:56,510 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:56,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:56,511 INFO L85 PathProgramCache]: Analyzing trace with hash -625509532, now seen corresponding path program 16 times [2021-12-14 16:55:56,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:56,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281857558] [2021-12-14 16:55:56,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:56,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:56,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:56,606 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 16:55:56,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:56,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281857558] [2021-12-14 16:55:56,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281857558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:56,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:56,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:55:56,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252648431] [2021-12-14 16:55:56,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:56,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:55:56,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:56,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:55:56,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:55:56,609 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-14 16:55:56,609 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 76 transitions, 347 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:56,609 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:56,609 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-14 16:55:56,609 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:56,758 INFO L129 PetriNetUnfolder]: 4/187 cut-off events. [2021-12-14 16:55:56,759 INFO L130 PetriNetUnfolder]: For 272/280 co-relation queries the response was YES. [2021-12-14 16:55:56,759 INFO L84 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 187 events. 4/187 cut-off events. For 272/280 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 730 event pairs, 1 based on Foata normal form. 4/187 useless extension candidates. Maximal degree in co-relation 484. Up to 39 conditions per place. [2021-12-14 16:55:56,760 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 35 selfloop transitions, 10 changer transitions 9/96 dead transitions. [2021-12-14 16:55:56,760 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 96 transitions, 580 flow [2021-12-14 16:55:56,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:55:56,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:55:56,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 583 transitions. [2021-12-14 16:55:56,761 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7197530864197531 [2021-12-14 16:55:56,761 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 583 transitions. [2021-12-14 16:55:56,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 583 transitions. [2021-12-14 16:55:56,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:56,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 583 transitions. [2021-12-14 16:55:56,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.3) internal successors, (583), 10 states have internal predecessors, (583), 0 states have call successors, (0), 0 states 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 16:55:56,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:56,763 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:56,763 INFO L186 Difference]: Start difference. First operand has 125 places, 76 transitions, 347 flow. Second operand 10 states and 583 transitions. [2021-12-14 16:55:56,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 96 transitions, 580 flow [2021-12-14 16:55:56,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 96 transitions, 552 flow, removed 9 selfloop flow, removed 6 redundant places. [2021-12-14 16:55:56,766 INFO L242 Difference]: Finished difference. Result has 130 places, 77 transitions, 380 flow [2021-12-14 16:55:56,766 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=380, PETRI_PLACES=130, PETRI_TRANSITIONS=77} [2021-12-14 16:55:56,766 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 56 predicate places. [2021-12-14 16:55:56,766 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 77 transitions, 380 flow [2021-12-14 16:55:56,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:56,766 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:56,766 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 16:55:56,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-14 16:55:56,767 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:56,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:56,767 INFO L85 PathProgramCache]: Analyzing trace with hash 383792464, now seen corresponding path program 17 times [2021-12-14 16:55:56,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:56,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593987874] [2021-12-14 16:55:56,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:56,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:56,868 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 16:55:56,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:56,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593987874] [2021-12-14 16:55:56,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593987874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:56,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:56,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:55:56,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593892381] [2021-12-14 16:55:56,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:56,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:55:56,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:56,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:55:56,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:55:56,870 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-14 16:55:56,870 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 77 transitions, 380 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:56,870 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:56,870 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-14 16:55:56,870 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:56,990 INFO L129 PetriNetUnfolder]: 4/173 cut-off events. [2021-12-14 16:55:56,990 INFO L130 PetriNetUnfolder]: For 342/350 co-relation queries the response was YES. [2021-12-14 16:55:56,990 INFO L84 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 173 events. 4/173 cut-off events. For 342/350 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 629 event pairs, 3 based on Foata normal form. 4/173 useless extension candidates. Maximal degree in co-relation 464. Up to 32 conditions per place. [2021-12-14 16:55:56,991 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 33 selfloop transitions, 5 changer transitions 14/94 dead transitions. [2021-12-14 16:55:56,991 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 94 transitions, 579 flow [2021-12-14 16:55:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:55:56,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:55:56,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 584 transitions. [2021-12-14 16:55:56,992 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7209876543209877 [2021-12-14 16:55:56,992 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 584 transitions. [2021-12-14 16:55:56,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 584 transitions. [2021-12-14 16:55:56,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:56,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 584 transitions. [2021-12-14 16:55:56,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.4) internal successors, (584), 10 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:55:56,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:56,994 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:56,994 INFO L186 Difference]: Start difference. First operand has 130 places, 77 transitions, 380 flow. Second operand 10 states and 584 transitions. [2021-12-14 16:55:56,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 94 transitions, 579 flow [2021-12-14 16:55:56,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 94 transitions, 534 flow, removed 11 selfloop flow, removed 9 redundant places. [2021-12-14 16:55:56,996 INFO L242 Difference]: Finished difference. Result has 131 places, 74 transitions, 330 flow [2021-12-14 16:55:56,997 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=330, PETRI_PLACES=131, PETRI_TRANSITIONS=74} [2021-12-14 16:55:56,997 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 57 predicate places. [2021-12-14 16:55:56,997 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 74 transitions, 330 flow [2021-12-14 16:55:56,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:56,997 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:56,997 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 16:55:56,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-14 16:55:56,998 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:56,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:56,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1668405252, now seen corresponding path program 18 times [2021-12-14 16:55:56,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:56,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974765975] [2021-12-14 16:55:56,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:56,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:57,106 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 16:55:57,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:57,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974765975] [2021-12-14 16:55:57,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974765975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:57,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:57,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:55:57,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532385191] [2021-12-14 16:55:57,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:57,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:55:57,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:57,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:55:57,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:55:57,109 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-14 16:55:57,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 74 transitions, 330 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:57,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:57,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-14 16:55:57,110 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:57,230 INFO L129 PetriNetUnfolder]: 3/142 cut-off events. [2021-12-14 16:55:57,230 INFO L130 PetriNetUnfolder]: For 214/220 co-relation queries the response was YES. [2021-12-14 16:55:57,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 142 events. 3/142 cut-off events. For 214/220 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 399 event pairs, 0 based on Foata normal form. 3/142 useless extension candidates. Maximal degree in co-relation 376. Up to 27 conditions per place. [2021-12-14 16:55:57,231 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 24 selfloop transitions, 5 changer transitions 15/86 dead transitions. [2021-12-14 16:55:57,231 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 86 transitions, 502 flow [2021-12-14 16:55:57,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:55:57,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:55:57,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 576 transitions. [2021-12-14 16:55:57,232 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2021-12-14 16:55:57,232 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 576 transitions. [2021-12-14 16:55:57,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 576 transitions. [2021-12-14 16:55:57,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:57,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 576 transitions. [2021-12-14 16:55:57,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 57.6) internal successors, (576), 10 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:55:57,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:57,234 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:57,234 INFO L186 Difference]: Start difference. First operand has 131 places, 74 transitions, 330 flow. Second operand 10 states and 576 transitions. [2021-12-14 16:55:57,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 86 transitions, 502 flow [2021-12-14 16:55:57,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 86 transitions, 464 flow, removed 10 selfloop flow, removed 11 redundant places. [2021-12-14 16:55:57,236 INFO L242 Difference]: Finished difference. Result has 125 places, 69 transitions, 263 flow [2021-12-14 16:55:57,236 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=263, PETRI_PLACES=125, PETRI_TRANSITIONS=69} [2021-12-14 16:55:57,237 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 51 predicate places. [2021-12-14 16:55:57,237 INFO L470 AbstractCegarLoop]: Abstraction has has 125 places, 69 transitions, 263 flow [2021-12-14 16:55:57,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:57,237 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:57,237 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 16:55:57,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-14 16:55:57,238 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:57,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:57,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1607529690, now seen corresponding path program 19 times [2021-12-14 16:55:57,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:57,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176956550] [2021-12-14 16:55:57,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:57,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:57,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:57,323 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 16:55:57,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:57,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176956550] [2021-12-14 16:55:57,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176956550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:57,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:57,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:55:57,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018552916] [2021-12-14 16:55:57,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:57,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:55:57,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:57,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:55:57,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:55:57,326 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-14 16:55:57,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 69 transitions, 263 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:57,326 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:57,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-14 16:55:57,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:57,450 INFO L129 PetriNetUnfolder]: 0/137 cut-off events. [2021-12-14 16:55:57,450 INFO L130 PetriNetUnfolder]: For 167/167 co-relation queries the response was YES. [2021-12-14 16:55:57,451 INFO L84 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 137 events. 0/137 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 362 event pairs, 0 based on Foata normal form. 2/138 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-12-14 16:55:57,451 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 20 selfloop transitions, 7 changer transitions 14/83 dead transitions. [2021-12-14 16:55:57,451 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 83 transitions, 465 flow [2021-12-14 16:55:57,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:55:57,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:55:57,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 574 transitions. [2021-12-14 16:55:57,452 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7086419753086419 [2021-12-14 16:55:57,452 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 574 transitions. [2021-12-14 16:55:57,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 574 transitions. [2021-12-14 16:55:57,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:57,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 574 transitions. [2021-12-14 16:55:57,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 57.4) internal successors, (574), 10 states have internal predecessors, (574), 0 states have call successors, (0), 0 states 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 16:55:57,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:57,454 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:57,454 INFO L186 Difference]: Start difference. First operand has 125 places, 69 transitions, 263 flow. Second operand 10 states and 574 transitions. [2021-12-14 16:55:57,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 83 transitions, 465 flow [2021-12-14 16:55:57,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 83 transitions, 388 flow, removed 9 selfloop flow, removed 16 redundant places. [2021-12-14 16:55:57,456 INFO L242 Difference]: Finished difference. Result has 113 places, 69 transitions, 244 flow [2021-12-14 16:55:57,456 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=244, PETRI_PLACES=113, PETRI_TRANSITIONS=69} [2021-12-14 16:55:57,456 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 39 predicate places. [2021-12-14 16:55:57,456 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 69 transitions, 244 flow [2021-12-14 16:55:57,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:57,456 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:55:57,456 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 16:55:57,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-14 16:55:57,456 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:55:57,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:55:57,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1409584476, now seen corresponding path program 20 times [2021-12-14 16:55:57,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:55:57,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834299569] [2021-12-14 16:55:57,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:55:57,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:55:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:55:57,531 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 16:55:57,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:55:57,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834299569] [2021-12-14 16:55:57,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834299569] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:55:57,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:55:57,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:55:57,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733673080] [2021-12-14 16:55:57,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:55:57,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:55:57,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:55:57,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:55:57,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:55:57,533 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 81 [2021-12-14 16:55:57,533 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 69 transitions, 244 flow. Second operand has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:57,533 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:55:57,534 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 81 [2021-12-14 16:55:57,534 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:55:57,641 INFO L129 PetriNetUnfolder]: 0/99 cut-off events. [2021-12-14 16:55:57,641 INFO L130 PetriNetUnfolder]: For 73/75 co-relation queries the response was YES. [2021-12-14 16:55:57,641 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 99 events. 0/99 cut-off events. For 73/75 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 163 event pairs, 0 based on Foata normal form. 2/100 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2021-12-14 16:55:57,642 INFO L132 encePairwiseOnDemand]: 71/81 looper letters, 0 selfloop transitions, 0 changer transitions 71/71 dead transitions. [2021-12-14 16:55:57,642 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 71 transitions, 348 flow [2021-12-14 16:55:57,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:55:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-14 16:55:57,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 566 transitions. [2021-12-14 16:55:57,642 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6987654320987654 [2021-12-14 16:55:57,642 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 566 transitions. [2021-12-14 16:55:57,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 566 transitions. [2021-12-14 16:55:57,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:55:57,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 566 transitions. [2021-12-14 16:55:57,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.6) internal successors, (566), 10 states have internal predecessors, (566), 0 states have call successors, (0), 0 states 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 16:55:57,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:57,644 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 16:55:57,644 INFO L186 Difference]: Start difference. First operand has 113 places, 69 transitions, 244 flow. Second operand 10 states and 566 transitions. [2021-12-14 16:55:57,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 71 transitions, 348 flow [2021-12-14 16:55:57,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 71 transitions, 314 flow, removed 8 selfloop flow, removed 8 redundant places. [2021-12-14 16:55:57,645 INFO L242 Difference]: Finished difference. Result has 107 places, 0 transitions, 0 flow [2021-12-14 16:55:57,645 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=107, PETRI_TRANSITIONS=0} [2021-12-14 16:55:57,646 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 33 predicate places. [2021-12-14 16:55:57,646 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 0 transitions, 0 flow [2021-12-14 16:55:57,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 16:55:57,648 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-12-14 16:55:57,648 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2021-12-14 16:55:57,648 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2021-12-14 16:55:57,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-14 16:55:57,651 INFO L732 BasicCegarLoop]: Path program histogram: [20, 10, 5, 3] [2021-12-14 16:55:57,652 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-14 16:55:57,653 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-14 16:55:57,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 04:55:57 BasicIcfg [2021-12-14 16:55:57,654 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-14 16:55:57,655 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-14 16:55:57,655 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-14 16:55:57,655 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-14 16:55:57,655 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:55:47" (3/4) ... [2021-12-14 16:55:57,657 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-14 16:55:57,661 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-12-14 16:55:57,661 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-12-14 16:55:57,677 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-12-14 16:55:57,677 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-14 16:55:57,677 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-14 16:55:57,677 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-14 16:55:57,711 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-14 16:55:57,712 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-14 16:55:57,712 INFO L158 Benchmark]: Toolchain (without parser) took 10936.40ms. Allocated memory was 98.6MB in the beginning and 234.9MB in the end (delta: 136.3MB). Free memory was 71.0MB in the beginning and 81.4MB in the end (delta: -10.4MB). Peak memory consumption was 126.1MB. Max. memory is 16.1GB. [2021-12-14 16:55:57,712 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 98.6MB. Free memory was 58.1MB in the beginning and 58.0MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 16:55:57,712 INFO L158 Benchmark]: CACSL2BoogieTranslator took 202.95ms. Allocated memory is still 98.6MB. Free memory was 70.7MB in the beginning and 75.6MB in the end (delta: -4.9MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. [2021-12-14 16:55:57,713 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.15ms. Allocated memory is still 98.6MB. Free memory was 75.2MB in the beginning and 73.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 16:55:57,713 INFO L158 Benchmark]: Boogie Preprocessor took 17.70ms. Allocated memory is still 98.6MB. Free memory was 73.8MB in the beginning and 72.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 16:55:57,713 INFO L158 Benchmark]: RCFGBuilder took 249.61ms. Allocated memory is still 98.6MB. Free memory was 72.6MB in the beginning and 62.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-14 16:55:57,713 INFO L158 Benchmark]: TraceAbstraction took 10384.53ms. Allocated memory was 98.6MB in the beginning and 234.9MB in the end (delta: 136.3MB). Free memory was 61.3MB in the beginning and 84.5MB in the end (delta: -23.2MB). Peak memory consumption was 112.2MB. Max. memory is 16.1GB. [2021-12-14 16:55:57,713 INFO L158 Benchmark]: Witness Printer took 56.74ms. Allocated memory is still 234.9MB. Free memory was 84.5MB in the beginning and 81.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-14 16:55:57,715 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 98.6MB. Free memory was 58.1MB in the beginning and 58.0MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 202.95ms. Allocated memory is still 98.6MB. Free memory was 70.7MB in the beginning and 75.6MB in the end (delta: -4.9MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.15ms. Allocated memory is still 98.6MB. Free memory was 75.2MB in the beginning and 73.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.70ms. Allocated memory is still 98.6MB. Free memory was 73.8MB in the beginning and 72.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 249.61ms. Allocated memory is still 98.6MB. Free memory was 72.6MB in the beginning and 62.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 10384.53ms. Allocated memory was 98.6MB in the beginning and 234.9MB in the end (delta: 136.3MB). Free memory was 61.3MB in the beginning and 84.5MB in the end (delta: -23.2MB). Peak memory consumption was 112.2MB. Max. memory is 16.1GB. * Witness Printer took 56.74ms. Allocated memory is still 234.9MB. Free memory was 84.5MB in the beginning and 81.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 76]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 101 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 10.3s, OverallIterations: 38, TraceHistogramMax: 1, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1856 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1856 mSDsluCounter, 4618 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5342 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4719 IncrementalHoareTripleChecker+Invalid, 4734 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 852 mSDtfsCounter, 4719 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 599 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 519 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=675occurred in iteration=23, InterpolantAutomatonStates: 375, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 2356 NumberOfCodeBlocks, 2356 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 2318 ConstructedInterpolants, 0 QuantifiedInterpolants, 13380 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 38 InterpolantComputations, 38 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-14 16:55:57,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE