./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/pthread-C-DAC/pthread-demo-datarace-2.i -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 8dedc3ea8e96f333d418860556906c8618bbf50be75cff10b45de6d34fe23444 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 02:54:32,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 02:54:32,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 02:54:32,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 02:54:32,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 02:54:32,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 02:54:32,938 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 02:54:32,940 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 02:54:32,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 02:54:32,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 02:54:32,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 02:54:32,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 02:54:32,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 02:54:32,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 02:54:32,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 02:54:32,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 02:54:32,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 02:54:32,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 02:54:32,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 02:54:32,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 02:54:32,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 02:54:32,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 02:54:32,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 02:54:32,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 02:54:32,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 02:54:32,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 02:54:32,973 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 02:54:32,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 02:54:32,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 02:54:32,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 02:54:32,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 02:54:32,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 02:54:32,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 02:54:32,978 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 02:54:32,979 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 02:54:32,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 02:54:32,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 02:54:32,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 02:54:32,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 02:54:32,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 02:54:32,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 02:54:32,982 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 02:54:32,998 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 02:54:33,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 02:54:33,000 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 02:54:33,001 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 02:54:33,001 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 02:54:33,001 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 02:54:33,002 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 02:54:33,002 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 02:54:33,002 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 02:54:33,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 02:54:33,003 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 02:54:33,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 02:54:33,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 02:54:33,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 02:54:33,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 02:54:33,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 02:54:33,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 02:54:33,004 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 02:54:33,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 02:54:33,004 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 02:54:33,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 02:54:33,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 02:54:33,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 02:54:33,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 02:54:33,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:54:33,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 02:54:33,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 02:54:33,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 02:54:33,007 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 02:54:33,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 02:54:33,007 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 02:54:33,007 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 02:54:33,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 02:54:33,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 02:54:33,007 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dedc3ea8e96f333d418860556906c8618bbf50be75cff10b45de6d34fe23444 [2021-12-16 02:54:33,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 02:54:33,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 02:54:33,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 02:54:33,248 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 02:54:33,249 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 02:54:33,250 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-2.i [2021-12-16 02:54:33,299 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f1f689e2/0cb7fa4c0bb7484290076969fa7b8d50/FLAGbe1519a02 [2021-12-16 02:54:33,697 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 02:54:33,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-2.i [2021-12-16 02:54:33,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f1f689e2/0cb7fa4c0bb7484290076969fa7b8d50/FLAGbe1519a02 [2021-12-16 02:54:33,734 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f1f689e2/0cb7fa4c0bb7484290076969fa7b8d50 [2021-12-16 02:54:33,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 02:54:33,737 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 02:54:33,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 02:54:33,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 02:54:33,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 02:54:33,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:54:33" (1/1) ... [2021-12-16 02:54:33,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45339ff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:54:33, skipping insertion in model container [2021-12-16 02:54:33,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:54:33" (1/1) ... [2021-12-16 02:54:33,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 02:54:33,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 02:54:33,944 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/pthread-C-DAC/pthread-demo-datarace-2.i[818,831] [2021-12-16 02:54:34,150 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:54:34,159 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 02:54:34,170 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/pthread-C-DAC/pthread-demo-datarace-2.i[818,831] [2021-12-16 02:54:34,218 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:54:34,278 INFO L208 MainTranslator]: Completed translation [2021-12-16 02:54:34,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:54:34 WrapperNode [2021-12-16 02:54:34,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 02:54:34,280 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 02:54:34,280 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 02:54:34,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 02:54:34,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:54:34" (1/1) ... [2021-12-16 02:54:34,310 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:54:34" (1/1) ... [2021-12-16 02:54:34,334 INFO L137 Inliner]: procedures = 363, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2021-12-16 02:54:34,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 02:54:34,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 02:54:34,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 02:54:34,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 02:54:34,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:54:34" (1/1) ... [2021-12-16 02:54:34,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:54:34" (1/1) ... [2021-12-16 02:54:34,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:54:34" (1/1) ... [2021-12-16 02:54:34,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:54:34" (1/1) ... [2021-12-16 02:54:34,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:54:34" (1/1) ... [2021-12-16 02:54:34,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:54:34" (1/1) ... [2021-12-16 02:54:34,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:54:34" (1/1) ... [2021-12-16 02:54:34,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 02:54:34,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 02:54:34,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 02:54:34,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 02:54:34,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:54:34" (1/1) ... [2021-12-16 02:54:34,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:54:34,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:54:34,408 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) [2021-12-16 02:54:34,423 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 [2021-12-16 02:54:34,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 02:54:34,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 02:54:34,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 02:54:34,439 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2021-12-16 02:54:34,439 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2021-12-16 02:54:34,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 02:54:34,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 02:54:34,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 02:54:34,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 02:54:34,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 02:54:34,440 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-16 02:54:34,549 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 02:54:34,550 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 02:54:34,679 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 02:54:34,684 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 02:54:34,684 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 02:54:34,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:54:34 BoogieIcfgContainer [2021-12-16 02:54:34,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 02:54:34,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 02:54:34,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 02:54:34,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 02:54:34,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 02:54:33" (1/3) ... [2021-12-16 02:54:34,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b67a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:54:34, skipping insertion in model container [2021-12-16 02:54:34,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:54:34" (2/3) ... [2021-12-16 02:54:34,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b67a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:54:34, skipping insertion in model container [2021-12-16 02:54:34,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:54:34" (3/3) ... [2021-12-16 02:54:34,692 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2021-12-16 02:54:34,696 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-16 02:54:34,696 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 02:54:34,696 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 02:54:34,697 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-16 02:54:34,713 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,714 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,714 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,714 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,714 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,714 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,714 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,714 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,715 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,715 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,715 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,715 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,715 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,716 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,716 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,716 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,716 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,716 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,716 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,717 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,717 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,717 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,717 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,717 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,717 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,718 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,718 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,718 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,718 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,718 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,718 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,718 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,719 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,719 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,719 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,719 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,719 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,719 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,720 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,720 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,720 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,720 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,722 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,723 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,723 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,723 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,723 WARN L322 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,724 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,724 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,724 WARN L322 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:54:34,727 INFO L148 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-12-16 02:54:34,768 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 02:54:34,773 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 [2021-12-16 02:54:34,774 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-16 02:54:34,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 97 places, 100 transitions, 208 flow [2021-12-16 02:54:34,827 INFO L129 PetriNetUnfolder]: 7/99 cut-off events. [2021-12-16 02:54:34,827 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-12-16 02:54:34,829 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 99 events. 7/99 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2021-12-16 02:54:34,830 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 100 transitions, 208 flow [2021-12-16 02:54:34,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 87 transitions, 180 flow [2021-12-16 02:54:34,846 INFO L129 PetriNetUnfolder]: 6/86 cut-off events. [2021-12-16 02:54:34,847 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-12-16 02:54:34,847 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:54:34,848 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] [2021-12-16 02:54:34,848 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-16 02:54:34,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:54:34,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1260448811, now seen corresponding path program 1 times [2021-12-16 02:54:34,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:54:34,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997557226] [2021-12-16 02:54:34,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:54:34,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:54:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:54:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:54:35,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:54:35,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997557226] [2021-12-16 02:54:35,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997557226] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:54:35,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:54:35,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 02:54:35,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832120833] [2021-12-16 02:54:35,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:54:35,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 02:54:35,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:54:35,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 02:54:35,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 02:54:35,087 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 100 [2021-12-16 02:54:35,091 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 180 flow. Second operand has 2 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:35,091 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:54:35,091 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 100 [2021-12-16 02:54:35,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:54:35,139 INFO L129 PetriNetUnfolder]: 2/81 cut-off events. [2021-12-16 02:54:35,143 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-16 02:54:35,144 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 81 events. 2/81 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 4/82 useless extension candidates. Maximal degree in co-relation 35. Up to 3 conditions per place. [2021-12-16 02:54:35,145 INFO L132 encePairwiseOnDemand]: 96/100 looper letters, 2 selfloop transitions, 0 changer transitions 0/81 dead transitions. [2021-12-16 02:54:35,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 172 flow [2021-12-16 02:54:35,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 02:54:35,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-16 02:54:35,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 186 transitions. [2021-12-16 02:54:35,158 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.93 [2021-12-16 02:54:35,158 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 186 transitions. [2021-12-16 02:54:35,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 186 transitions. [2021-12-16 02:54:35,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:54:35,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 186 transitions. [2021-12-16 02:54:35,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 93.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:35,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:35,173 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:35,174 INFO L186 Difference]: Start difference. First operand has 85 places, 87 transitions, 180 flow. Second operand 2 states and 186 transitions. [2021-12-16 02:54:35,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 172 flow [2021-12-16 02:54:35,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 81 transitions, 168 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-16 02:54:35,180 INFO L242 Difference]: Finished difference. Result has 82 places, 81 transitions, 164 flow [2021-12-16 02:54:35,181 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=164, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2021-12-16 02:54:35,187 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, -3 predicate places. [2021-12-16 02:54:35,187 INFO L470 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 164 flow [2021-12-16 02:54:35,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:35,188 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:54:35,188 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] [2021-12-16 02:54:35,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 02:54:35,189 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-16 02:54:35,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:54:35,190 INFO L85 PathProgramCache]: Analyzing trace with hash -2128438445, now seen corresponding path program 1 times [2021-12-16 02:54:35,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:54:35,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686416770] [2021-12-16 02:54:35,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:54:35,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:54:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:54:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:54:35,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:54:35,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686416770] [2021-12-16 02:54:35,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686416770] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:54:35,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:54:35,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:54:35,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396156838] [2021-12-16 02:54:35,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:54:35,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:54:35,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:54:35,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:54:35,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:54:35,259 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 100 [2021-12-16 02:54:35,260 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:35,260 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:54:35,260 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 100 [2021-12-16 02:54:35,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:54:35,280 INFO L129 PetriNetUnfolder]: 2/85 cut-off events. [2021-12-16 02:54:35,281 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-12-16 02:54:35,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 85 events. 2/85 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 98. Up to 10 conditions per place. [2021-12-16 02:54:35,282 INFO L132 encePairwiseOnDemand]: 97/100 looper letters, 10 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2021-12-16 02:54:35,282 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 84 transitions, 194 flow [2021-12-16 02:54:35,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:54:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-16 02:54:35,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 262 transitions. [2021-12-16 02:54:35,284 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8733333333333333 [2021-12-16 02:54:35,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 262 transitions. [2021-12-16 02:54:35,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 262 transitions. [2021-12-16 02:54:35,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:54:35,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 262 transitions. [2021-12-16 02:54:35,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:35,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:35,287 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:35,287 INFO L186 Difference]: Start difference. First operand has 82 places, 81 transitions, 164 flow. Second operand 3 states and 262 transitions. [2021-12-16 02:54:35,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 84 transitions, 194 flow [2021-12-16 02:54:35,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 84 transitions, 194 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-16 02:54:35,290 INFO L242 Difference]: Finished difference. Result has 85 places, 82 transitions, 176 flow [2021-12-16 02:54:35,290 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2021-12-16 02:54:35,291 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 0 predicate places. [2021-12-16 02:54:35,291 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 176 flow [2021-12-16 02:54:35,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:35,292 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:54:35,292 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] [2021-12-16 02:54:35,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 02:54:35,293 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-16 02:54:35,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:54:35,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1554204240, now seen corresponding path program 1 times [2021-12-16 02:54:35,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:54:35,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952906362] [2021-12-16 02:54:35,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:54:35,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:54:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:54:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:54:35,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:54:35,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952906362] [2021-12-16 02:54:35,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952906362] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:54:35,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056875926] [2021-12-16 02:54:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:54:35,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:54:35,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:54:35,394 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) [2021-12-16 02:54:35,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 02:54:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:54:35,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 02:54:35,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:54:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 02:54:35,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:54:35,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056875926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:54:35,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:54:35,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-16 02:54:35,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833359270] [2021-12-16 02:54:35,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:54:35,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:54:35,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:54:35,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:54:35,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:54:35,641 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 100 [2021-12-16 02:54:35,641 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 82 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:35,642 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:54:35,642 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 100 [2021-12-16 02:54:35,642 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:54:35,659 INFO L129 PetriNetUnfolder]: 2/92 cut-off events. [2021-12-16 02:54:35,659 INFO L130 PetriNetUnfolder]: For 2/9 co-relation queries the response was YES. [2021-12-16 02:54:35,660 INFO L84 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 92 events. 2/92 cut-off events. For 2/9 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 1/91 useless extension candidates. Maximal degree in co-relation 109. Up to 9 conditions per place. [2021-12-16 02:54:35,660 INFO L132 encePairwiseOnDemand]: 97/100 looper letters, 9 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2021-12-16 02:54:35,661 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 85 transitions, 204 flow [2021-12-16 02:54:35,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:54:35,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-16 02:54:35,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 264 transitions. [2021-12-16 02:54:35,662 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.88 [2021-12-16 02:54:35,662 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 264 transitions. [2021-12-16 02:54:35,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 264 transitions. [2021-12-16 02:54:35,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:54:35,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 264 transitions. [2021-12-16 02:54:35,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:35,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:35,665 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:35,665 INFO L186 Difference]: Start difference. First operand has 85 places, 82 transitions, 176 flow. Second operand 3 states and 264 transitions. [2021-12-16 02:54:35,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 85 transitions, 204 flow [2021-12-16 02:54:35,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 85 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-16 02:54:35,667 INFO L242 Difference]: Finished difference. Result has 87 places, 83 transitions, 186 flow [2021-12-16 02:54:35,667 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=87, PETRI_TRANSITIONS=83} [2021-12-16 02:54:35,667 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 2 predicate places. [2021-12-16 02:54:35,668 INFO L470 AbstractCegarLoop]: Abstraction has has 87 places, 83 transitions, 186 flow [2021-12-16 02:54:35,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:35,668 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:54:35,668 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] [2021-12-16 02:54:35,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 02:54:35,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:54:35,886 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-16 02:54:35,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:54:35,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1764280257, now seen corresponding path program 1 times [2021-12-16 02:54:35,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:54:35,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402867930] [2021-12-16 02:54:35,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:54:35,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:54:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:54:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 02:54:35,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:54:35,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402867930] [2021-12-16 02:54:35,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402867930] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:54:35,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161183424] [2021-12-16 02:54:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:54:35,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:54:35,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:54:35,957 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:54:35,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 02:54:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:54:36,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 02:54:36,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:54:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 02:54:36,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:54:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 02:54:36,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161183424] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:54:36,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:54:36,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-16 02:54:36,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253903420] [2021-12-16 02:54:36,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:54:36,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 02:54:36,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:54:36,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 02:54:36,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-16 02:54:36,287 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 100 [2021-12-16 02:54:36,288 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 83 transitions, 186 flow. Second operand has 10 states, 10 states have (on average 84.9) internal successors, (849), 10 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:36,288 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:54:36,289 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 100 [2021-12-16 02:54:36,289 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:54:36,340 INFO L129 PetriNetUnfolder]: 2/102 cut-off events. [2021-12-16 02:54:36,340 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-16 02:54:36,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 102 events. 2/102 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 2/103 useless extension candidates. Maximal degree in co-relation 131. Up to 7 conditions per place. [2021-12-16 02:54:36,342 INFO L132 encePairwiseOnDemand]: 94/100 looper letters, 9 selfloop transitions, 9 changer transitions 0/91 dead transitions. [2021-12-16 02:54:36,342 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 91 transitions, 240 flow [2021-12-16 02:54:36,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 02:54:36,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-16 02:54:36,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 767 transitions. [2021-12-16 02:54:36,344 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8522222222222222 [2021-12-16 02:54:36,344 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 767 transitions. [2021-12-16 02:54:36,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 767 transitions. [2021-12-16 02:54:36,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:54:36,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 767 transitions. [2021-12-16 02:54:36,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 85.22222222222223) internal successors, (767), 9 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:36,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:36,357 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:36,357 INFO L186 Difference]: Start difference. First operand has 87 places, 83 transitions, 186 flow. Second operand 9 states and 767 transitions. [2021-12-16 02:54:36,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 91 transitions, 240 flow [2021-12-16 02:54:36,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 91 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-16 02:54:36,359 INFO L242 Difference]: Finished difference. Result has 97 places, 89 transitions, 234 flow [2021-12-16 02:54:36,360 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=234, PETRI_PLACES=97, PETRI_TRANSITIONS=89} [2021-12-16 02:54:36,360 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 12 predicate places. [2021-12-16 02:54:36,360 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 89 transitions, 234 flow [2021-12-16 02:54:36,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 84.9) internal successors, (849), 10 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:36,361 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:54:36,361 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:54:36,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 02:54:36,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-16 02:54:36,582 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-16 02:54:36,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:54:36,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1547231883, now seen corresponding path program 2 times [2021-12-16 02:54:36,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:54:36,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258911966] [2021-12-16 02:54:36,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:54:36,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:54:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:54:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-16 02:54:36,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:54:36,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258911966] [2021-12-16 02:54:36,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258911966] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:54:36,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139711778] [2021-12-16 02:54:36,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 02:54:36,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:54:36,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:54:36,656 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:54:36,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 02:54:36,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 02:54:36,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:54:36,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 02:54:36,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:54:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-16 02:54:36,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:54:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-16 02:54:36,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139711778] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:54:36,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:54:36,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-16 02:54:36,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382326918] [2021-12-16 02:54:36,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:54:36,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 02:54:36,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:54:36,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 02:54:36,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-16 02:54:36,950 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 100 [2021-12-16 02:54:36,951 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 89 transitions, 234 flow. Second operand has 10 states, 10 states have (on average 84.0) internal successors, (840), 10 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:36,951 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:54:36,951 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 100 [2021-12-16 02:54:36,951 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:54:37,007 INFO L129 PetriNetUnfolder]: 2/109 cut-off events. [2021-12-16 02:54:37,008 INFO L130 PetriNetUnfolder]: For 7/21 co-relation queries the response was YES. [2021-12-16 02:54:37,009 INFO L84 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 109 events. 2/109 cut-off events. For 7/21 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 66 event pairs, 0 based on Foata normal form. 9/117 useless extension candidates. Maximal degree in co-relation 159. Up to 8 conditions per place. [2021-12-16 02:54:37,009 INFO L132 encePairwiseOnDemand]: 94/100 looper letters, 10 selfloop transitions, 9 changer transitions 0/97 dead transitions. [2021-12-16 02:54:37,009 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 97 transitions, 290 flow [2021-12-16 02:54:37,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 02:54:37,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-16 02:54:37,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 759 transitions. [2021-12-16 02:54:37,011 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8433333333333334 [2021-12-16 02:54:37,012 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 759 transitions. [2021-12-16 02:54:37,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 759 transitions. [2021-12-16 02:54:37,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:54:37,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 759 transitions. [2021-12-16 02:54:37,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 84.33333333333333) internal successors, (759), 9 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:37,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:37,015 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:37,015 INFO L186 Difference]: Start difference. First operand has 97 places, 89 transitions, 234 flow. Second operand 9 states and 759 transitions. [2021-12-16 02:54:37,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 97 transitions, 290 flow [2021-12-16 02:54:37,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 97 transitions, 284 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-12-16 02:54:37,018 INFO L242 Difference]: Finished difference. Result has 107 places, 95 transitions, 278 flow [2021-12-16 02:54:37,018 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=278, PETRI_PLACES=107, PETRI_TRANSITIONS=95} [2021-12-16 02:54:37,019 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 22 predicate places. [2021-12-16 02:54:37,019 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 95 transitions, 278 flow [2021-12-16 02:54:37,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 84.0) internal successors, (840), 10 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:37,020 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:54:37,020 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:54:37,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 02:54:37,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:54:37,236 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-16 02:54:37,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:54:37,236 INFO L85 PathProgramCache]: Analyzing trace with hash 885541253, now seen corresponding path program 3 times [2021-12-16 02:54:37,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:54:37,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121321633] [2021-12-16 02:54:37,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:54:37,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:54:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:54:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-16 02:54:37,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:54:37,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121321633] [2021-12-16 02:54:37,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121321633] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:54:37,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571620181] [2021-12-16 02:54:37,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 02:54:37,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:54:37,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:54:37,313 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:54:37,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 02:54:37,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 02:54:37,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:54:37,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 02:54:37,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:54:37,567 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 02:54:37,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:54:37,765 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 02:54:37,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571620181] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:54:37,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:54:37,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2021-12-16 02:54:37,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525120670] [2021-12-16 02:54:37,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:54:37,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 02:54:37,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:54:37,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 02:54:37,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-12-16 02:54:37,769 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 100 [2021-12-16 02:54:37,771 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 95 transitions, 278 flow. Second operand has 23 states, 23 states have (on average 77.6086956521739) internal successors, (1785), 23 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:37,771 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:54:37,771 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 100 [2021-12-16 02:54:37,771 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:54:41,917 INFO L129 PetriNetUnfolder]: 673/1895 cut-off events. [2021-12-16 02:54:41,917 INFO L130 PetriNetUnfolder]: For 2216/2216 co-relation queries the response was YES. [2021-12-16 02:54:41,923 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5373 conditions, 1895 events. 673/1895 cut-off events. For 2216/2216 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 10425 event pairs, 20 based on Foata normal form. 116/2008 useless extension candidates. Maximal degree in co-relation 5362. Up to 231 conditions per place. [2021-12-16 02:54:41,936 INFO L132 encePairwiseOnDemand]: 89/100 looper letters, 325 selfloop transitions, 451 changer transitions 0/840 dead transitions. [2021-12-16 02:54:41,936 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 840 transitions, 5686 flow [2021-12-16 02:54:41,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2021-12-16 02:54:41,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2021-12-16 02:54:41,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 17415 transitions. [2021-12-16 02:54:41,961 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7880090497737556 [2021-12-16 02:54:41,962 INFO L72 ComplementDD]: Start complementDD. Operand 221 states and 17415 transitions. [2021-12-16 02:54:41,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 221 states and 17415 transitions. [2021-12-16 02:54:42,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:54:42,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 221 states and 17415 transitions. [2021-12-16 02:54:42,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 222 states, 221 states have (on average 78.80090497737557) internal successors, (17415), 221 states have internal predecessors, (17415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:42,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 222 states, 222 states have (on average 100.0) internal successors, (22200), 222 states have internal predecessors, (22200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:42,104 INFO L81 ComplementDD]: Finished complementDD. Result has 222 states, 222 states have (on average 100.0) internal successors, (22200), 222 states have internal predecessors, (22200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:42,104 INFO L186 Difference]: Start difference. First operand has 107 places, 95 transitions, 278 flow. Second operand 221 states and 17415 transitions. [2021-12-16 02:54:42,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 840 transitions, 5686 flow [2021-12-16 02:54:42,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 840 transitions, 5486 flow, removed 80 selfloop flow, removed 1 redundant places. [2021-12-16 02:54:42,138 INFO L242 Difference]: Finished difference. Result has 426 places, 570 transitions, 4232 flow [2021-12-16 02:54:42,138 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=221, PETRI_FLOW=4232, PETRI_PLACES=426, PETRI_TRANSITIONS=570} [2021-12-16 02:54:42,141 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 341 predicate places. [2021-12-16 02:54:42,141 INFO L470 AbstractCegarLoop]: Abstraction has has 426 places, 570 transitions, 4232 flow [2021-12-16 02:54:42,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 77.6086956521739) internal successors, (1785), 23 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:42,142 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:54:42,142 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:54:42,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 02:54:42,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:54:42,360 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-16 02:54:42,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:54:42,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1162091128, now seen corresponding path program 4 times [2021-12-16 02:54:42,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:54:42,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087276761] [2021-12-16 02:54:42,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:54:42,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:54:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:54:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-16 02:54:42,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:54:42,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087276761] [2021-12-16 02:54:42,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087276761] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:54:42,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300611412] [2021-12-16 02:54:42,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 02:54:42,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:54:42,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:54:42,482 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:54:42,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 02:54:42,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 02:54:42,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:54:42,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 02:54:42,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:54:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-16 02:54:42,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:54:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-16 02:54:43,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300611412] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:54:43,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:54:43,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2021-12-16 02:54:43,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828491629] [2021-12-16 02:54:43,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:54:43,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 02:54:43,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:54:43,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 02:54:43,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2021-12-16 02:54:43,059 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 100 [2021-12-16 02:54:43,060 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 570 transitions, 4232 flow. Second operand has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:43,060 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:54:43,060 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 100 [2021-12-16 02:54:43,060 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:54:43,818 INFO L129 PetriNetUnfolder]: 471/1649 cut-off events. [2021-12-16 02:54:43,819 INFO L130 PetriNetUnfolder]: For 65295/66199 co-relation queries the response was YES. [2021-12-16 02:54:43,845 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9626 conditions, 1649 events. 471/1649 cut-off events. For 65295/66199 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 10226 event pairs, 75 based on Foata normal form. 228/1812 useless extension candidates. Maximal degree in co-relation 9515. Up to 261 conditions per place. [2021-12-16 02:54:43,859 INFO L132 encePairwiseOnDemand]: 94/100 looper letters, 16 selfloop transitions, 331 changer transitions 0/668 dead transitions. [2021-12-16 02:54:43,860 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 668 transitions, 6050 flow [2021-12-16 02:54:43,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-16 02:54:43,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-16 02:54:43,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2262 transitions. [2021-12-16 02:54:43,873 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8377777777777777 [2021-12-16 02:54:43,873 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2262 transitions. [2021-12-16 02:54:43,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2262 transitions. [2021-12-16 02:54:43,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:54:43,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2262 transitions. [2021-12-16 02:54:43,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 83.77777777777777) internal successors, (2262), 27 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:43,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 100.0) internal successors, (2800), 28 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:43,893 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 100.0) internal successors, (2800), 28 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:43,894 INFO L186 Difference]: Start difference. First operand has 426 places, 570 transitions, 4232 flow. Second operand 27 states and 2262 transitions. [2021-12-16 02:54:43,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 668 transitions, 6050 flow [2021-12-16 02:54:44,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 668 transitions, 5466 flow, removed 106 selfloop flow, removed 12 redundant places. [2021-12-16 02:54:44,207 INFO L242 Difference]: Finished difference. Result has 446 places, 661 transitions, 5483 flow [2021-12-16 02:54:44,209 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3648, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5483, PETRI_PLACES=446, PETRI_TRANSITIONS=661} [2021-12-16 02:54:44,209 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 361 predicate places. [2021-12-16 02:54:44,209 INFO L470 AbstractCegarLoop]: Abstraction has has 446 places, 661 transitions, 5483 flow [2021-12-16 02:54:44,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:44,210 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:54:44,210 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:54:44,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 02:54:44,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:54:44,423 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-16 02:54:44,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:54:44,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1778070953, now seen corresponding path program 5 times [2021-12-16 02:54:44,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:54:44,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959721263] [2021-12-16 02:54:44,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:54:44,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:54:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:54:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 102 proven. 175 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-16 02:54:44,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:54:44,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959721263] [2021-12-16 02:54:44,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959721263] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:54:44,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841724516] [2021-12-16 02:54:44,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 02:54:44,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:54:44,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:54:44,633 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:54:44,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 02:54:44,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-16 02:54:44,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:54:44,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 02:54:44,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:54:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 102 proven. 175 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-16 02:54:44,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:54:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 102 proven. 175 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-16 02:54:45,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841724516] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:54:45,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:54:45,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2021-12-16 02:54:45,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855079512] [2021-12-16 02:54:45,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:54:45,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-16 02:54:45,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:54:45,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-16 02:54:45,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 02:54:45,498 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 100 [2021-12-16 02:54:45,499 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 661 transitions, 5483 flow. Second operand has 34 states, 34 states have (on average 84.97058823529412) internal successors, (2889), 34 states have internal predecessors, (2889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:45,499 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:54:45,499 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 100 [2021-12-16 02:54:45,499 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:54:46,915 INFO L129 PetriNetUnfolder]: 983/3364 cut-off events. [2021-12-16 02:54:46,915 INFO L130 PetriNetUnfolder]: For 251035/252527 co-relation queries the response was YES. [2021-12-16 02:54:46,985 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16107 conditions, 3364 events. 983/3364 cut-off events. For 251035/252527 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 23534 event pairs, 155 based on Foata normal form. 98/3392 useless extension candidates. Maximal degree in co-relation 15990. Up to 524 conditions per place. [2021-12-16 02:54:47,017 INFO L132 encePairwiseOnDemand]: 94/100 looper letters, 121 selfloop transitions, 495 changer transitions 0/1018 dead transitions. [2021-12-16 02:54:47,017 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 1018 transitions, 9447 flow [2021-12-16 02:54:47,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-16 02:54:47,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-12-16 02:54:47,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3809 transitions. [2021-12-16 02:54:47,020 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8464444444444444 [2021-12-16 02:54:47,020 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3809 transitions. [2021-12-16 02:54:47,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3809 transitions. [2021-12-16 02:54:47,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:54:47,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3809 transitions. [2021-12-16 02:54:47,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 84.64444444444445) internal successors, (3809), 45 states have internal predecessors, (3809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:47,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 100.0) internal successors, (4600), 46 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:47,028 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 100.0) internal successors, (4600), 46 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:47,028 INFO L186 Difference]: Start difference. First operand has 446 places, 661 transitions, 5483 flow. Second operand 45 states and 3809 transitions. [2021-12-16 02:54:47,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 1018 transitions, 9447 flow [2021-12-16 02:54:47,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1018 transitions, 8595 flow, removed 186 selfloop flow, removed 39 redundant places. [2021-12-16 02:54:47,530 INFO L242 Difference]: Finished difference. Result has 460 places, 936 transitions, 7793 flow [2021-12-16 02:54:47,530 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=4631, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=7793, PETRI_PLACES=460, PETRI_TRANSITIONS=936} [2021-12-16 02:54:47,531 INFO L334 CegarLoopForPetriNet]: 85 programPoint places, 375 predicate places. [2021-12-16 02:54:47,531 INFO L470 AbstractCegarLoop]: Abstraction has has 460 places, 936 transitions, 7793 flow [2021-12-16 02:54:47,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 84.97058823529412) internal successors, (2889), 34 states have internal predecessors, (2889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:47,532 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:54:47,532 INFO L254 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:54:47,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 02:54:47,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:54:47,747 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-16 02:54:47,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:54:47,748 INFO L85 PathProgramCache]: Analyzing trace with hash 816486975, now seen corresponding path program 6 times [2021-12-16 02:54:47,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:54:47,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216266748] [2021-12-16 02:54:47,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:54:47,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:54:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:54:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 102 proven. 855 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-16 02:54:48,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:54:48,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216266748] [2021-12-16 02:54:48,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216266748] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:54:48,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267097199] [2021-12-16 02:54:48,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 02:54:48,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:54:48,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:54:48,198 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:54:48,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 02:54:48,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-16 02:54:48,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:54:48,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 02:54:48,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:54:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2021-12-16 02:54:48,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:54:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2021-12-16 02:54:49,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267097199] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:54:49,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:54:49,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 21, 21] total 71 [2021-12-16 02:54:49,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432081930] [2021-12-16 02:54:49,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:54:49,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-16 02:54:49,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:54:49,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-16 02:54:49,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=4263, Unknown=0, NotChecked=0, Total=4970 [2021-12-16 02:54:49,424 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 100 [2021-12-16 02:54:49,429 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 936 transitions, 7793 flow. Second operand has 71 states, 71 states have (on average 77.30985915492958) internal successors, (5489), 71 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:54:49,429 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:54:49,429 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 100 [2021-12-16 02:54:49,429 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand