./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/bench-exp2x9.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/bench-exp2x9.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 d6a1dd92aa2998cfb1326128fd549d301e029b328accb048c4d2ec692e416e63 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:40:19,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:40:19,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:40:19,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:40:19,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:40:20,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:40:20,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:40:20,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:40:20,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:40:20,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:40:20,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:40:20,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:40:20,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:40:20,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:40:20,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:40:20,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:40:20,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:40:20,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:40:20,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:40:20,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:40:20,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:40:20,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:40:20,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:40:20,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:40:20,032 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:40:20,033 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:40:20,033 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:40:20,034 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:40:20,035 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:40:20,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:40:20,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:40:20,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:40:20,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:40:20,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:40:20,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:40:20,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:40:20,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:40:20,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:40:20,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:40:20,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:40:20,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:40:20,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:40:20,066 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:40:20,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:40:20,067 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:40:20,067 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:40:20,067 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:40:20,068 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:40:20,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:40:20,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:40:20,068 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:40:20,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:40:20,069 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:40:20,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:40:20,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:40:20,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:40:20,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:40:20,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:40:20,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:40:20,070 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:40:20,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:40:20,070 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:40:20,070 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:40:20,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:40:20,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:40:20,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:40:20,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:40:20,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:40:20,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:40:20,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:40:20,072 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:40:20,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:40:20,073 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:40:20,073 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:40:20,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:40:20,073 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:40:20,073 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6a1dd92aa2998cfb1326128fd549d301e029b328accb048c4d2ec692e416e63 [2021-12-22 13:40:20,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:40:20,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:40:20,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:40:20,294 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:40:20,295 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:40:20,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp2x9.wvr.c [2021-12-22 13:40:20,347 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b97806756/75fa2985df0f42748e9494099efb9506/FLAGf9002bf30 [2021-12-22 13:40:20,711 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:40:20,712 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp2x9.wvr.c [2021-12-22 13:40:20,719 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b97806756/75fa2985df0f42748e9494099efb9506/FLAGf9002bf30 [2021-12-22 13:40:20,727 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b97806756/75fa2985df0f42748e9494099efb9506 [2021-12-22 13:40:20,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:40:20,730 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:40:20,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:40:20,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:40:20,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:40:20,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:40:20" (1/1) ... [2021-12-22 13:40:20,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37937a75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:20, skipping insertion in model container [2021-12-22 13:40:20,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:40:20" (1/1) ... [2021-12-22 13:40:20,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:40:20,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:40:20,925 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/bench-exp2x9.wvr.c[2669,2682] [2021-12-22 13:40:20,932 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:40:20,938 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:40:20,957 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/bench-exp2x9.wvr.c[2669,2682] [2021-12-22 13:40:20,958 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:40:20,967 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:40:20,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:20 WrapperNode [2021-12-22 13:40:20,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:40:20,969 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:40:20,969 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:40:20,969 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:40:20,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:20" (1/1) ... [2021-12-22 13:40:20,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:20" (1/1) ... [2021-12-22 13:40:20,993 INFO L137 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2021-12-22 13:40:20,993 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:40:20,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:40:20,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:40:20,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:40:21,000 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:20" (1/1) ... [2021-12-22 13:40:21,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:20" (1/1) ... [2021-12-22 13:40:21,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:20" (1/1) ... [2021-12-22 13:40:21,002 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:20" (1/1) ... [2021-12-22 13:40:21,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:20" (1/1) ... [2021-12-22 13:40:21,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:20" (1/1) ... [2021-12-22 13:40:21,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:20" (1/1) ... [2021-12-22 13:40:21,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:40:21,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:40:21,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:40:21,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:40:21,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:20" (1/1) ... [2021-12-22 13:40:21,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:40:21,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:40:21,077 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 13:40:21,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 13:40:21,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:40:21,117 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-22 13:40:21,117 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-22 13:40:21,118 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-22 13:40:21,118 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-22 13:40:21,118 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-22 13:40:21,118 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-22 13:40:21,121 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-12-22 13:40:21,121 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-12-22 13:40:21,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:40:21,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:40:21,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:40:21,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:40:21,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:40:21,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:40:21,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:40:21,123 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-22 13:40:21,202 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:40:21,204 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:40:21,400 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:40:21,415 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:40:21,415 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-22 13:40:21,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:40:21 BoogieIcfgContainer [2021-12-22 13:40:21,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:40:21,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:40:21,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:40:21,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:40:21,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:40:20" (1/3) ... [2021-12-22 13:40:21,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51460e35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:40:21, skipping insertion in model container [2021-12-22 13:40:21,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:40:20" (2/3) ... [2021-12-22 13:40:21,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51460e35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:40:21, skipping insertion in model container [2021-12-22 13:40:21,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:40:21" (3/3) ... [2021-12-22 13:40:21,431 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp2x9.wvr.c [2021-12-22 13:40:21,436 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:40:21,436 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:40:21,437 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:40:21,437 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:40:21,490 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,490 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,491 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,491 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,492 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,493 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,493 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,493 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,494 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,494 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,495 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,495 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,496 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,497 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,497 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,497 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,500 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,502 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,504 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,504 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,504 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,505 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,505 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,505 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:40:21,514 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-12-22 13:40:21,547 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:40:21,553 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 13:40:21,553 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-12-22 13:40:21,562 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 152 places, 149 transitions, 330 flow [2021-12-22 13:40:21,604 INFO L129 PetriNetUnfolder]: 10/145 cut-off events. [2021-12-22 13:40:21,605 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-22 13:40:21,616 INFO L84 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 145 events. 10/145 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 131 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2021-12-22 13:40:21,617 INFO L82 GeneralOperation]: Start removeDead. Operand has 152 places, 149 transitions, 330 flow [2021-12-22 13:40:21,621 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 132 transitions, 288 flow [2021-12-22 13:40:21,659 INFO L129 PetriNetUnfolder]: 10/131 cut-off events. [2021-12-22 13:40:21,659 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-22 13:40:21,659 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:40:21,660 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:40:21,660 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-22 13:40:21,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:40:21,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1414166451, now seen corresponding path program 1 times [2021-12-22 13:40:21,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:40:21,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654526276] [2021-12-22 13:40:21,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:21,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:40:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:40:21,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:40:21,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654526276] [2021-12-22 13:40:21,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654526276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:40:21,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:40:21,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:40:21,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391709650] [2021-12-22 13:40:21,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:40:21,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 13:40:21,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:40:21,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 13:40:21,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:40:21,942 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 149 [2021-12-22 13:40:21,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 132 transitions, 288 flow. Second operand has 2 states, 2 states have (on average 139.0) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:21,948 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:40:21,948 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 149 [2021-12-22 13:40:21,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:40:22,011 INFO L129 PetriNetUnfolder]: 4/126 cut-off events. [2021-12-22 13:40:22,011 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-12-22 13:40:22,013 INFO L84 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 126 events. 4/126 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 117 event pairs, 0 based on Foata normal form. 18/138 useless extension candidates. Maximal degree in co-relation 101. Up to 9 conditions per place. [2021-12-22 13:40:22,015 INFO L132 encePairwiseOnDemand]: 143/149 looper letters, 8 selfloop transitions, 0 changer transitions 2/126 dead transitions. [2021-12-22 13:40:22,016 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 126 transitions, 292 flow [2021-12-22 13:40:22,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 13:40:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-22 13:40:22,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 282 transitions. [2021-12-22 13:40:22,030 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9463087248322147 [2021-12-22 13:40:22,030 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 282 transitions. [2021-12-22 13:40:22,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 282 transitions. [2021-12-22 13:40:22,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:40:22,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 282 transitions. [2021-12-22 13:40:22,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 141.0) internal successors, (282), 2 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:22,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:22,047 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:22,051 INFO L186 Difference]: Start difference. First operand has 135 places, 132 transitions, 288 flow. Second operand 2 states and 282 transitions. [2021-12-22 13:40:22,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 126 transitions, 292 flow [2021-12-22 13:40:22,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 126 transitions, 276 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-12-22 13:40:22,059 INFO L242 Difference]: Finished difference. Result has 128 places, 124 transitions, 256 flow [2021-12-22 13:40:22,061 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=256, PETRI_PLACES=128, PETRI_TRANSITIONS=124} [2021-12-22 13:40:22,065 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, -7 predicate places. [2021-12-22 13:40:22,066 INFO L470 AbstractCegarLoop]: Abstraction has has 128 places, 124 transitions, 256 flow [2021-12-22 13:40:22,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 139.0) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:22,066 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:40:22,067 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:40:22,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:40:22,067 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-22 13:40:22,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:40:22,068 INFO L85 PathProgramCache]: Analyzing trace with hash 735830245, now seen corresponding path program 1 times [2021-12-22 13:40:22,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:40:22,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472163472] [2021-12-22 13:40:22,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:22,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:40:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:40:22,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:40:22,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472163472] [2021-12-22 13:40:22,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472163472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:40:22,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:40:22,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:40:22,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370240478] [2021-12-22 13:40:22,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:40:22,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:40:22,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:40:22,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:40:22,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:40:22,545 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 149 [2021-12-22 13:40:22,545 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 124 transitions, 256 flow. Second operand has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:22,545 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:40:22,546 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 149 [2021-12-22 13:40:22,546 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:40:25,043 INFO L129 PetriNetUnfolder]: 24847/33594 cut-off events. [2021-12-22 13:40:25,044 INFO L130 PetriNetUnfolder]: For 860/935 co-relation queries the response was YES. [2021-12-22 13:40:25,120 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67682 conditions, 33594 events. 24847/33594 cut-off events. For 860/935 co-relation queries the response was YES. Maximal size of possible extension queue 1124. Compared 189881 event pairs, 11708 based on Foata normal form. 1/29807 useless extension candidates. Maximal degree in co-relation 67679. Up to 32788 conditions per place. [2021-12-22 13:40:25,284 INFO L132 encePairwiseOnDemand]: 139/149 looper letters, 71 selfloop transitions, 7 changer transitions 4/146 dead transitions. [2021-12-22 13:40:25,284 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 146 transitions, 471 flow [2021-12-22 13:40:25,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:40:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:40:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 643 transitions. [2021-12-22 13:40:25,286 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6164908916586769 [2021-12-22 13:40:25,286 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 643 transitions. [2021-12-22 13:40:25,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 643 transitions. [2021-12-22 13:40:25,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:40:25,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 643 transitions. [2021-12-22 13:40:25,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 91.85714285714286) internal successors, (643), 7 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:25,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:25,291 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:25,291 INFO L186 Difference]: Start difference. First operand has 128 places, 124 transitions, 256 flow. Second operand 7 states and 643 transitions. [2021-12-22 13:40:25,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 146 transitions, 471 flow [2021-12-22 13:40:25,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 146 transitions, 471 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:40:25,294 INFO L242 Difference]: Finished difference. Result has 135 places, 128 transitions, 297 flow [2021-12-22 13:40:25,294 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=297, PETRI_PLACES=135, PETRI_TRANSITIONS=128} [2021-12-22 13:40:25,295 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 0 predicate places. [2021-12-22 13:40:25,295 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 128 transitions, 297 flow [2021-12-22 13:40:25,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:25,295 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:40:25,295 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:40:25,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:40:25,296 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-22 13:40:25,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:40:25,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1435785726, now seen corresponding path program 1 times [2021-12-22 13:40:25,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:40:25,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542286960] [2021-12-22 13:40:25,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:25,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:40:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:40:25,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:40:25,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542286960] [2021-12-22 13:40:25,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542286960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:40:25,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:40:25,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:40:25,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220106413] [2021-12-22 13:40:25,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:40:25,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:40:25,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:40:25,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:40:25,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:40:25,512 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 149 [2021-12-22 13:40:25,513 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 128 transitions, 297 flow. Second operand has 6 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:25,513 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:40:25,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 149 [2021-12-22 13:40:25,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:40:27,744 INFO L129 PetriNetUnfolder]: 24821/33501 cut-off events. [2021-12-22 13:40:27,744 INFO L130 PetriNetUnfolder]: For 3786/3861 co-relation queries the response was YES. [2021-12-22 13:40:27,880 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71364 conditions, 33501 events. 24821/33501 cut-off events. For 3786/3861 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 189180 event pairs, 11557 based on Foata normal form. 0/29743 useless extension candidates. Maximal degree in co-relation 71357. Up to 32790 conditions per place. [2021-12-22 13:40:27,998 INFO L132 encePairwiseOnDemand]: 138/149 looper letters, 81 selfloop transitions, 11 changer transitions 1/155 dead transitions. [2021-12-22 13:40:27,999 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 155 transitions, 554 flow [2021-12-22 13:40:27,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:40:27,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:40:28,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 563 transitions. [2021-12-22 13:40:28,001 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6297539149888143 [2021-12-22 13:40:28,001 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 563 transitions. [2021-12-22 13:40:28,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 563 transitions. [2021-12-22 13:40:28,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:40:28,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 563 transitions. [2021-12-22 13:40:28,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.83333333333333) internal successors, (563), 6 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:28,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:28,004 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:28,004 INFO L186 Difference]: Start difference. First operand has 135 places, 128 transitions, 297 flow. Second operand 6 states and 563 transitions. [2021-12-22 13:40:28,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 155 transitions, 554 flow [2021-12-22 13:40:28,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 155 transitions, 539 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-12-22 13:40:28,011 INFO L242 Difference]: Finished difference. Result has 135 places, 132 transitions, 337 flow [2021-12-22 13:40:28,011 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=337, PETRI_PLACES=135, PETRI_TRANSITIONS=132} [2021-12-22 13:40:28,013 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 0 predicate places. [2021-12-22 13:40:28,013 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 132 transitions, 337 flow [2021-12-22 13:40:28,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:28,013 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:40:28,014 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:40:28,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:40:28,014 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-22 13:40:28,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:40:28,016 INFO L85 PathProgramCache]: Analyzing trace with hash -678323914, now seen corresponding path program 2 times [2021-12-22 13:40:28,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:40:28,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000419101] [2021-12-22 13:40:28,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:28,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:40:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:40:28,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:40:28,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000419101] [2021-12-22 13:40:28,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000419101] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:40:28,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:40:28,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:40:28,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599505424] [2021-12-22 13:40:28,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:40:28,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:40:28,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:40:28,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:40:28,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:40:28,195 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 149 [2021-12-22 13:40:28,195 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 132 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:28,196 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:40:28,196 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 149 [2021-12-22 13:40:28,196 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:40:30,147 INFO L129 PetriNetUnfolder]: 24709/33724 cut-off events. [2021-12-22 13:40:30,148 INFO L130 PetriNetUnfolder]: For 7516/7601 co-relation queries the response was YES. [2021-12-22 13:40:30,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75024 conditions, 33724 events. 24709/33724 cut-off events. For 7516/7601 co-relation queries the response was YES. Maximal size of possible extension queue 1143. Compared 194599 event pairs, 12405 based on Foata normal form. 37/31819 useless extension candidates. Maximal degree in co-relation 75017. Up to 32735 conditions per place. [2021-12-22 13:40:30,482 INFO L132 encePairwiseOnDemand]: 138/149 looper letters, 82 selfloop transitions, 13 changer transitions 1/158 dead transitions. [2021-12-22 13:40:30,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 158 transitions, 613 flow [2021-12-22 13:40:30,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:40:30,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:40:30,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 562 transitions. [2021-12-22 13:40:30,485 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6286353467561522 [2021-12-22 13:40:30,485 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 562 transitions. [2021-12-22 13:40:30,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 562 transitions. [2021-12-22 13:40:30,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:40:30,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 562 transitions. [2021-12-22 13:40:30,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.66666666666667) internal successors, (562), 6 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) [2021-12-22 13:40:30,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:30,489 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:30,489 INFO L186 Difference]: Start difference. First operand has 135 places, 132 transitions, 337 flow. Second operand 6 states and 562 transitions. [2021-12-22 13:40:30,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 158 transitions, 613 flow [2021-12-22 13:40:30,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 158 transitions, 591 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-22 13:40:30,494 INFO L242 Difference]: Finished difference. Result has 138 places, 136 transitions, 384 flow [2021-12-22 13:40:30,495 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=384, PETRI_PLACES=138, PETRI_TRANSITIONS=136} [2021-12-22 13:40:30,496 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 3 predicate places. [2021-12-22 13:40:30,496 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 136 transitions, 384 flow [2021-12-22 13:40:30,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:30,496 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:40:30,497 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:40:30,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:40:30,497 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-22 13:40:30,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:40:30,498 INFO L85 PathProgramCache]: Analyzing trace with hash 34940876, now seen corresponding path program 3 times [2021-12-22 13:40:30,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:40:30,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067403495] [2021-12-22 13:40:30,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:30,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:40:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:40:30,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:40:30,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067403495] [2021-12-22 13:40:30,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067403495] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:40:30,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:40:30,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:40:30,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594854722] [2021-12-22 13:40:30,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:40:30,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:40:30,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:40:30,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:40:30,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:40:30,730 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 149 [2021-12-22 13:40:30,730 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 136 transitions, 384 flow. Second operand has 7 states, 7 states have (on average 83.42857142857143) internal successors, (584), 7 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:30,731 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:40:30,731 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 149 [2021-12-22 13:40:30,731 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:40:32,964 INFO L129 PetriNetUnfolder]: 27400/37091 cut-off events. [2021-12-22 13:40:32,965 INFO L130 PetriNetUnfolder]: For 14775/14847 co-relation queries the response was YES. [2021-12-22 13:40:33,072 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85484 conditions, 37091 events. 27400/37091 cut-off events. For 14775/14847 co-relation queries the response was YES. Maximal size of possible extension queue 1301. Compared 215849 event pairs, 8744 based on Foata normal form. 902/35852 useless extension candidates. Maximal degree in co-relation 85475. Up to 29078 conditions per place. [2021-12-22 13:40:33,211 INFO L132 encePairwiseOnDemand]: 139/149 looper letters, 111 selfloop transitions, 15 changer transitions 1/189 dead transitions. [2021-12-22 13:40:33,211 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 189 transitions, 783 flow [2021-12-22 13:40:33,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:40:33,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:40:33,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 670 transitions. [2021-12-22 13:40:33,213 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6423777564717162 [2021-12-22 13:40:33,213 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 670 transitions. [2021-12-22 13:40:33,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 670 transitions. [2021-12-22 13:40:33,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:40:33,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 670 transitions. [2021-12-22 13:40:33,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 95.71428571428571) internal successors, (670), 7 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:33,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:33,220 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:33,220 INFO L186 Difference]: Start difference. First operand has 138 places, 136 transitions, 384 flow. Second operand 7 states and 670 transitions. [2021-12-22 13:40:33,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 189 transitions, 783 flow [2021-12-22 13:40:33,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 189 transitions, 760 flow, removed 5 selfloop flow, removed 3 redundant places. [2021-12-22 13:40:33,230 INFO L242 Difference]: Finished difference. Result has 143 places, 137 transitions, 418 flow [2021-12-22 13:40:33,231 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=418, PETRI_PLACES=143, PETRI_TRANSITIONS=137} [2021-12-22 13:40:33,233 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 8 predicate places. [2021-12-22 13:40:33,233 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 137 transitions, 418 flow [2021-12-22 13:40:33,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.42857142857143) internal successors, (584), 7 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:33,233 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:40:33,233 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:40:33,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:40:33,234 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-22 13:40:33,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:40:33,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1082751602, now seen corresponding path program 1 times [2021-12-22 13:40:33,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:40:33,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675362776] [2021-12-22 13:40:33,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:33,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:40:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:40:33,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:40:33,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675362776] [2021-12-22 13:40:33,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675362776] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:40:33,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:40:33,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:40:33,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225361175] [2021-12-22 13:40:33,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:40:33,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:40:33,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:40:33,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:40:33,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:40:33,439 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 149 [2021-12-22 13:40:33,440 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 137 transitions, 418 flow. Second operand has 6 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:33,440 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:40:33,440 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 149 [2021-12-22 13:40:33,440 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:40:35,973 INFO L129 PetriNetUnfolder]: 27379/39351 cut-off events. [2021-12-22 13:40:35,974 INFO L130 PetriNetUnfolder]: For 21988/22051 co-relation queries the response was YES. [2021-12-22 13:40:36,098 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91342 conditions, 39351 events. 27379/39351 cut-off events. For 21988/22051 co-relation queries the response was YES. Maximal size of possible extension queue 1523. Compared 259709 event pairs, 14648 based on Foata normal form. 0/37227 useless extension candidates. Maximal degree in co-relation 91332. Up to 36326 conditions per place. [2021-12-22 13:40:36,226 INFO L132 encePairwiseOnDemand]: 138/149 looper letters, 89 selfloop transitions, 21 changer transitions 1/173 dead transitions. [2021-12-22 13:40:36,226 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 173 transitions, 838 flow [2021-12-22 13:40:36,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:40:36,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:40:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 564 transitions. [2021-12-22 13:40:36,228 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6308724832214765 [2021-12-22 13:40:36,228 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 564 transitions. [2021-12-22 13:40:36,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 564 transitions. [2021-12-22 13:40:36,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:40:36,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 564 transitions. [2021-12-22 13:40:36,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 94.0) internal successors, (564), 6 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:36,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:36,236 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:36,237 INFO L186 Difference]: Start difference. First operand has 143 places, 137 transitions, 418 flow. Second operand 6 states and 564 transitions. [2021-12-22 13:40:36,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 173 transitions, 838 flow [2021-12-22 13:40:36,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 173 transitions, 809 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-22 13:40:36,247 INFO L242 Difference]: Finished difference. Result has 146 places, 147 transitions, 548 flow [2021-12-22 13:40:36,247 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=548, PETRI_PLACES=146, PETRI_TRANSITIONS=147} [2021-12-22 13:40:36,248 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 11 predicate places. [2021-12-22 13:40:36,248 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 147 transitions, 548 flow [2021-12-22 13:40:36,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:36,248 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:40:36,248 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:40:36,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:40:36,249 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-22 13:40:36,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:40:36,249 INFO L85 PathProgramCache]: Analyzing trace with hash 267422604, now seen corresponding path program 2 times [2021-12-22 13:40:36,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:40:36,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266797227] [2021-12-22 13:40:36,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:36,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:40:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:36,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:40:36,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:40:36,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266797227] [2021-12-22 13:40:36,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266797227] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:40:36,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:40:36,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:40:36,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455506867] [2021-12-22 13:40:36,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:40:36,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:40:36,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:40:36,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:40:36,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:40:36,378 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 149 [2021-12-22 13:40:36,379 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 147 transitions, 548 flow. Second operand has 6 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:36,379 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:40:36,379 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 149 [2021-12-22 13:40:36,379 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:40:38,848 INFO L129 PetriNetUnfolder]: 27326/39130 cut-off events. [2021-12-22 13:40:38,848 INFO L130 PetriNetUnfolder]: For 24540/24603 co-relation queries the response was YES. [2021-12-22 13:40:38,997 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94991 conditions, 39130 events. 27326/39130 cut-off events. For 24540/24603 co-relation queries the response was YES. Maximal size of possible extension queue 1511. Compared 253803 event pairs, 17526 based on Foata normal form. 20/38872 useless extension candidates. Maximal degree in co-relation 94978. Up to 36297 conditions per place. [2021-12-22 13:40:39,151 INFO L132 encePairwiseOnDemand]: 138/149 looper letters, 90 selfloop transitions, 17 changer transitions 2/171 dead transitions. [2021-12-22 13:40:39,151 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 171 transitions, 844 flow [2021-12-22 13:40:39,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:40:39,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:40:39,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 562 transitions. [2021-12-22 13:40:39,153 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6286353467561522 [2021-12-22 13:40:39,153 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 562 transitions. [2021-12-22 13:40:39,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 562 transitions. [2021-12-22 13:40:39,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:40:39,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 562 transitions. [2021-12-22 13:40:39,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.66666666666667) internal successors, (562), 6 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) [2021-12-22 13:40:39,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:39,156 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:39,157 INFO L186 Difference]: Start difference. First operand has 146 places, 147 transitions, 548 flow. Second operand 6 states and 562 transitions. [2021-12-22 13:40:39,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 171 transitions, 844 flow [2021-12-22 13:40:39,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 171 transitions, 827 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-22 13:40:39,168 INFO L242 Difference]: Finished difference. Result has 150 places, 145 transitions, 550 flow [2021-12-22 13:40:39,168 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=550, PETRI_PLACES=150, PETRI_TRANSITIONS=145} [2021-12-22 13:40:39,169 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 15 predicate places. [2021-12-22 13:40:39,169 INFO L470 AbstractCegarLoop]: Abstraction has has 150 places, 145 transitions, 550 flow [2021-12-22 13:40:39,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.33333333333333) internal successors, (506), 6 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:39,170 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:40:39,170 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:40:39,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:40:39,170 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-22 13:40:39,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:40:39,170 INFO L85 PathProgramCache]: Analyzing trace with hash 620717378, now seen corresponding path program 1 times [2021-12-22 13:40:39,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:40:39,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686135184] [2021-12-22 13:40:39,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:39,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:40:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:39,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:40:39,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:40:39,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686135184] [2021-12-22 13:40:39,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686135184] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:40:39,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993268648] [2021-12-22 13:40:39,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:39,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:40:39,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:40:39,337 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:40:39,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:40:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:39,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 13:40:39,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:40:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:40:39,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:40:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:40:40,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993268648] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:40:40,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:40:40,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-12-22 13:40:40,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839137356] [2021-12-22 13:40:40,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:40:40,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:40:40,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:40:40,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:40:40,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:40:40,341 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 149 [2021-12-22 13:40:40,342 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 145 transitions, 550 flow. Second operand has 14 states, 14 states have (on average 83.35714285714286) internal successors, (1167), 14 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:40,342 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:40:40,342 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 149 [2021-12-22 13:40:40,342 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:40:44,325 INFO L129 PetriNetUnfolder]: 38104/55867 cut-off events. [2021-12-22 13:40:44,325 INFO L130 PetriNetUnfolder]: For 40938/40979 co-relation queries the response was YES. [2021-12-22 13:40:44,581 INFO L84 FinitePrefix]: Finished finitePrefix Result has 140707 conditions, 55867 events. 38104/55867 cut-off events. For 40938/40979 co-relation queries the response was YES. Maximal size of possible extension queue 1883. Compared 389838 event pairs, 2933 based on Foata normal form. 1114/56792 useless extension candidates. Maximal degree in co-relation 140692. Up to 30380 conditions per place. [2021-12-22 13:40:45,006 INFO L132 encePairwiseOnDemand]: 134/149 looper letters, 250 selfloop transitions, 32 changer transitions 2/346 dead transitions. [2021-12-22 13:40:45,006 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 346 transitions, 1826 flow [2021-12-22 13:40:45,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:40:45,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-22 13:40:45,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1357 transitions. [2021-12-22 13:40:45,010 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6505273250239694 [2021-12-22 13:40:45,010 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1357 transitions. [2021-12-22 13:40:45,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1357 transitions. [2021-12-22 13:40:45,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:40:45,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1357 transitions. [2021-12-22 13:40:45,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 96.92857142857143) internal successors, (1357), 14 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:45,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 149.0) internal successors, (2235), 15 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:45,016 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 149.0) internal successors, (2235), 15 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:45,016 INFO L186 Difference]: Start difference. First operand has 150 places, 145 transitions, 550 flow. Second operand 14 states and 1357 transitions. [2021-12-22 13:40:45,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 346 transitions, 1826 flow [2021-12-22 13:40:45,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 346 transitions, 1785 flow, removed 12 selfloop flow, removed 3 redundant places. [2021-12-22 13:40:45,051 INFO L242 Difference]: Finished difference. Result has 167 places, 157 transitions, 700 flow [2021-12-22 13:40:45,052 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=700, PETRI_PLACES=167, PETRI_TRANSITIONS=157} [2021-12-22 13:40:45,052 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 32 predicate places. [2021-12-22 13:40:45,053 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 157 transitions, 700 flow [2021-12-22 13:40:45,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 83.35714285714286) internal successors, (1167), 14 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:45,053 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:40:45,053 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:40:45,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 13:40:45,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:40:45,256 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-22 13:40:45,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:40:45,256 INFO L85 PathProgramCache]: Analyzing trace with hash 440214246, now seen corresponding path program 3 times [2021-12-22 13:40:45,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:40:45,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280505865] [2021-12-22 13:40:45,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:45,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:40:45,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:45,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:40:45,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:40:45,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280505865] [2021-12-22 13:40:45,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280505865] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:40:45,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:40:45,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:40:45,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814566266] [2021-12-22 13:40:45,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:40:45,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:40:45,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:40:45,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:40:45,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:40:45,433 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 149 [2021-12-22 13:40:45,433 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 157 transitions, 700 flow. Second operand has 7 states, 7 states have (on average 83.42857142857143) internal successors, (584), 7 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:45,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:40:45,433 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 149 [2021-12-22 13:40:45,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:40:50,247 INFO L129 PetriNetUnfolder]: 41124/59664 cut-off events. [2021-12-22 13:40:50,248 INFO L130 PetriNetUnfolder]: For 79828/79903 co-relation queries the response was YES. [2021-12-22 13:40:50,558 INFO L84 FinitePrefix]: Finished finitePrefix Result has 169767 conditions, 59664 events. 41124/59664 cut-off events. For 79828/79903 co-relation queries the response was YES. Maximal size of possible extension queue 1978. Compared 410802 event pairs, 23951 based on Foata normal form. 909/60284 useless extension candidates. Maximal degree in co-relation 169746. Up to 44500 conditions per place. [2021-12-22 13:40:50,782 INFO L132 encePairwiseOnDemand]: 139/149 looper letters, 133 selfloop transitions, 21 changer transitions 2/218 dead transitions. [2021-12-22 13:40:50,782 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 218 transitions, 1289 flow [2021-12-22 13:40:50,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:40:50,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:40:50,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 670 transitions. [2021-12-22 13:40:50,784 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6423777564717162 [2021-12-22 13:40:50,784 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 670 transitions. [2021-12-22 13:40:50,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 670 transitions. [2021-12-22 13:40:50,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:40:50,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 670 transitions. [2021-12-22 13:40:50,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 95.71428571428571) internal successors, (670), 7 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:50,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:50,788 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:50,788 INFO L186 Difference]: Start difference. First operand has 167 places, 157 transitions, 700 flow. Second operand 7 states and 670 transitions. [2021-12-22 13:40:50,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 218 transitions, 1289 flow [2021-12-22 13:40:51,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 218 transitions, 1258 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-12-22 13:40:51,313 INFO L242 Difference]: Finished difference. Result has 170 places, 158 transitions, 744 flow [2021-12-22 13:40:51,314 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=744, PETRI_PLACES=170, PETRI_TRANSITIONS=158} [2021-12-22 13:40:51,314 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 35 predicate places. [2021-12-22 13:40:51,315 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 158 transitions, 744 flow [2021-12-22 13:40:51,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.42857142857143) internal successors, (584), 7 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:51,315 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:40:51,315 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:40:51,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:40:51,316 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-22 13:40:51,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:40:51,316 INFO L85 PathProgramCache]: Analyzing trace with hash -387427532, now seen corresponding path program 1 times [2021-12-22 13:40:51,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:40:51,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963194572] [2021-12-22 13:40:51,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:51,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:40:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:40:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:40:51,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:40:51,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963194572] [2021-12-22 13:40:51,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963194572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:40:51,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:40:51,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:40:51,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306183051] [2021-12-22 13:40:51,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:40:51,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:40:51,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:40:51,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:40:51,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:40:51,450 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 149 [2021-12-22 13:40:51,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 158 transitions, 744 flow. Second operand has 7 states, 7 states have (on average 83.42857142857143) internal successors, (584), 7 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:51,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:40:51,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 149 [2021-12-22 13:40:51,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:40:56,785 INFO L129 PetriNetUnfolder]: 44814/64695 cut-off events. [2021-12-22 13:40:56,785 INFO L130 PetriNetUnfolder]: For 108788/108853 co-relation queries the response was YES. [2021-12-22 13:40:57,167 INFO L84 FinitePrefix]: Finished finitePrefix Result has 194158 conditions, 64695 events. 44814/64695 cut-off events. For 108788/108853 co-relation queries the response was YES. Maximal size of possible extension queue 2003. Compared 446321 event pairs, 24472 based on Foata normal form. 1271/65805 useless extension candidates. Maximal degree in co-relation 194135. Up to 49580 conditions per place. [2021-12-22 13:40:57,423 INFO L132 encePairwiseOnDemand]: 139/149 looper letters, 144 selfloop transitions, 19 changer transitions 2/227 dead transitions. [2021-12-22 13:40:57,423 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 227 transitions, 1459 flow [2021-12-22 13:40:57,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:40:57,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:40:57,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 670 transitions. [2021-12-22 13:40:57,425 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6423777564717162 [2021-12-22 13:40:57,425 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 670 transitions. [2021-12-22 13:40:57,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 670 transitions. [2021-12-22 13:40:57,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:40:57,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 670 transitions. [2021-12-22 13:40:57,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 95.71428571428571) internal successors, (670), 7 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:57,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:57,429 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:57,429 INFO L186 Difference]: Start difference. First operand has 170 places, 158 transitions, 744 flow. Second operand 7 states and 670 transitions. [2021-12-22 13:40:57,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 227 transitions, 1459 flow [2021-12-22 13:40:57,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 227 transitions, 1434 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-22 13:40:57,966 INFO L242 Difference]: Finished difference. Result has 174 places, 159 transitions, 786 flow [2021-12-22 13:40:57,967 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=786, PETRI_PLACES=174, PETRI_TRANSITIONS=159} [2021-12-22 13:40:57,969 INFO L334 CegarLoopForPetriNet]: 135 programPoint places, 39 predicate places. [2021-12-22 13:40:57,969 INFO L470 AbstractCegarLoop]: Abstraction has has 174 places, 159 transitions, 786 flow [2021-12-22 13:40:57,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.42857142857143) internal successors, (584), 7 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:40:57,971 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:40:57,971 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:40:57,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 13:40:57,971 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-12-22 13:40:57,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:40:57,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1745629947, now seen corresponding path program 1 times [2021-12-22 13:40:57,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:40:57,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932042439] [2021-12-22 13:40:57,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:40:57,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:40:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat