./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/clever.wvr.c --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/weaver/clever.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 93a2fdd4bcf1d0c2ab8b4e49feeb28ec4b1782148939310f1cb0ffe97948195e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:02:43,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:02:43,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:02:43,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:02:43,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:02:43,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:02:43,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:02:43,427 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:02:43,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:02:43,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:02:43,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:02:43,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:02:43,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:02:43,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:02:43,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:02:43,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:02:43,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:02:43,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:02:43,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:02:43,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:02:43,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:02:43,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:02:43,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:02:43,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:02:43,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:02:43,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:02:43,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:02:43,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:02:43,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:02:43,448 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:02:43,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:02:43,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:02:43,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:02:43,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:02:43,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:02:43,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:02:43,452 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:02:43,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:02:43,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:02:43,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:02:43,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:02:43,455 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 03:02:43,481 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:02:43,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:02:43,484 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:02:43,484 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:02:43,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:02:43,485 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:02:43,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:02:43,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:02:43,486 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:02:43,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:02:43,487 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 03:02:43,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:02:43,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 03:02:43,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:02:43,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:02:43,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:02:43,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:02:43,488 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 03:02:43,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:02:43,489 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:02:43,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:02:43,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:02:43,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:02:43,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:02:43,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:02:43,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:02:43,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:02:43,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:02:43,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:02:43,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:02:43,491 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:02:43,491 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:02:43,492 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:02:43,492 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:02:43,492 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93a2fdd4bcf1d0c2ab8b4e49feeb28ec4b1782148939310f1cb0ffe97948195e [2021-12-16 03:02:43,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:02:43,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:02:43,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:02:43,771 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:02:43,772 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:02:43,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/clever.wvr.c [2021-12-16 03:02:43,833 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccc5d8624/f4c7967f2cfe406dbde75c6d1f391a56/FLAG94d7ee242 [2021-12-16 03:02:44,286 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:02:44,287 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c [2021-12-16 03:02:44,296 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccc5d8624/f4c7967f2cfe406dbde75c6d1f391a56/FLAG94d7ee242 [2021-12-16 03:02:44,315 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccc5d8624/f4c7967f2cfe406dbde75c6d1f391a56 [2021-12-16 03:02:44,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:02:44,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:02:44,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:02:44,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:02:44,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:02:44,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:02:44" (1/1) ... [2021-12-16 03:02:44,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f704c49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:44, skipping insertion in model container [2021-12-16 03:02:44,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:02:44" (1/1) ... [2021-12-16 03:02:44,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:02:44,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:02:44,541 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c[2133,2146] [2021-12-16 03:02:44,545 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:02:44,553 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:02:44,586 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c[2133,2146] [2021-12-16 03:02:44,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:02:44,601 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:02:44,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:44 WrapperNode [2021-12-16 03:02:44,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:02:44,602 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:02:44,603 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:02:44,603 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:02:44,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:44" (1/1) ... [2021-12-16 03:02:44,619 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:44" (1/1) ... [2021-12-16 03:02:44,642 INFO L137 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 78 [2021-12-16 03:02:44,642 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:02:44,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:02:44,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:02:44,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:02:44,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:44" (1/1) ... [2021-12-16 03:02:44,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:44" (1/1) ... [2021-12-16 03:02:44,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:44" (1/1) ... [2021-12-16 03:02:44,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:44" (1/1) ... [2021-12-16 03:02:44,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:44" (1/1) ... [2021-12-16 03:02:44,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:44" (1/1) ... [2021-12-16 03:02:44,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:44" (1/1) ... [2021-12-16 03:02:44,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:02:44,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:02:44,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:02:44,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:02:44,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:44" (1/1) ... [2021-12-16 03:02:44,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:02:44,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:02:44,717 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 03:02:44,743 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 03:02:44,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:02:44,758 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-16 03:02:44,758 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-16 03:02:44,759 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-16 03:02:44,759 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-16 03:02:44,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:02:44,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:02:44,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 03:02:44,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:02:44,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:02:44,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 03:02:44,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:02:44,761 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 03:02:44,852 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:02:44,853 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:02:45,063 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:02:45,074 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:02:45,075 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-16 03:02:45,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:02:45 BoogieIcfgContainer [2021-12-16 03:02:45,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:02:45,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:02:45,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:02:45,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:02:45,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:02:44" (1/3) ... [2021-12-16 03:02:45,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be1f16c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:02:45, skipping insertion in model container [2021-12-16 03:02:45,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:02:44" (2/3) ... [2021-12-16 03:02:45,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be1f16c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:02:45, skipping insertion in model container [2021-12-16 03:02:45,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:02:45" (3/3) ... [2021-12-16 03:02:45,087 INFO L111 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2021-12-16 03:02:45,091 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-16 03:02:45,091 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:02:45,091 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:02:45,092 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-16 03:02:45,137 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,138 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,138 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,138 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,139 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,139 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,139 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,139 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,140 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,140 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,140 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,141 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,141 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,141 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,142 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,142 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,142 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,142 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,143 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,143 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,144 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,144 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,145 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,145 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,145 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,146 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,146 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,146 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,146 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,147 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,147 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,147 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,151 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,151 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,151 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,151 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,152 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,155 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,155 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,156 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:02:45,158 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-16 03:02:45,205 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:02:45,213 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 03:02:45,214 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-16 03:02:45,229 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 119 places, 121 transitions, 258 flow [2021-12-16 03:02:45,294 INFO L129 PetriNetUnfolder]: 9/119 cut-off events. [2021-12-16 03:02:45,297 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-16 03:02:45,301 INFO L84 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 119 events. 9/119 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2021-12-16 03:02:45,303 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 121 transitions, 258 flow [2021-12-16 03:02:45,307 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 110 transitions, 232 flow [2021-12-16 03:02:45,376 INFO L129 PetriNetUnfolder]: 9/109 cut-off events. [2021-12-16 03:02:45,376 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-16 03:02:45,377 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:45,377 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:02:45,378 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:45,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:45,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1012186015, now seen corresponding path program 1 times [2021-12-16 03:02:45,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:45,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510906838] [2021-12-16 03:02:45,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:45,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:45,612 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 03:02:45,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:45,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510906838] [2021-12-16 03:02:45,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510906838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:45,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:45,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 03:02:45,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495317632] [2021-12-16 03:02:45,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:45,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 03:02:45,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:45,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 03:02:45,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 03:02:45,664 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 121 [2021-12-16 03:02:45,669 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 110 transitions, 232 flow. Second operand has 2 states, 2 states have (on average 112.5) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states 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 03:02:45,669 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:45,669 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 121 [2021-12-16 03:02:45,671 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:45,720 INFO L129 PetriNetUnfolder]: 3/104 cut-off events. [2021-12-16 03:02:45,721 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-16 03:02:45,723 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 104 events. 3/104 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 9/107 useless extension candidates. Maximal degree in co-relation 82. Up to 5 conditions per place. [2021-12-16 03:02:45,725 INFO L132 encePairwiseOnDemand]: 115/121 looper letters, 4 selfloop transitions, 0 changer transitions 3/104 dead transitions. [2021-12-16 03:02:45,727 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 104 transitions, 228 flow [2021-12-16 03:02:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 03:02:45,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-16 03:02:45,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 230 transitions. [2021-12-16 03:02:45,740 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9504132231404959 [2021-12-16 03:02:45,740 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 230 transitions. [2021-12-16 03:02:45,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 230 transitions. [2021-12-16 03:02:45,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:45,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 230 transitions. [2021-12-16 03:02:45,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 115.0) internal successors, (230), 2 states have internal predecessors, (230), 0 states have call successors, (0), 0 states 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 03:02:45,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states 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 03:02:45,760 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states 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 03:02:45,761 INFO L186 Difference]: Start difference. First operand has 108 places, 110 transitions, 232 flow. Second operand 2 states and 230 transitions. [2021-12-16 03:02:45,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 104 transitions, 228 flow [2021-12-16 03:02:45,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 104 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-16 03:02:45,769 INFO L242 Difference]: Finished difference. Result has 105 places, 101 transitions, 206 flow [2021-12-16 03:02:45,771 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=206, PETRI_PLACES=105, PETRI_TRANSITIONS=101} [2021-12-16 03:02:45,774 INFO L334 CegarLoopForPetriNet]: 108 programPoint places, -3 predicate places. [2021-12-16 03:02:45,774 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 101 transitions, 206 flow [2021-12-16 03:02:45,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 112.5) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states 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 03:02:45,775 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:45,775 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:02:45,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:02:45,776 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:45,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:45,777 INFO L85 PathProgramCache]: Analyzing trace with hash -741860448, now seen corresponding path program 1 times [2021-12-16 03:02:45,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:45,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688722827] [2021-12-16 03:02:45,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:45,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:46,232 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 03:02:46,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:46,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688722827] [2021-12-16 03:02:46,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688722827] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:46,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:46,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 03:02:46,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677954424] [2021-12-16 03:02:46,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:46,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 03:02:46,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:46,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 03:02:46,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:02:46,237 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 121 [2021-12-16 03:02:46,238 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 101 transitions, 206 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states 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 03:02:46,238 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:46,238 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 121 [2021-12-16 03:02:46,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:46,402 INFO L129 PetriNetUnfolder]: 16/165 cut-off events. [2021-12-16 03:02:46,403 INFO L130 PetriNetUnfolder]: For 4/5 co-relation queries the response was YES. [2021-12-16 03:02:46,403 INFO L84 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 165 events. 16/165 cut-off events. For 4/5 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 341 event pairs, 1 based on Foata normal form. 2/156 useless extension candidates. Maximal degree in co-relation 215. Up to 28 conditions per place. [2021-12-16 03:02:46,404 INFO L132 encePairwiseOnDemand]: 113/121 looper letters, 23 selfloop transitions, 5 changer transitions 4/110 dead transitions. [2021-12-16 03:02:46,404 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 110 transitions, 291 flow [2021-12-16 03:02:46,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:02:46,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:02:46,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 649 transitions. [2021-12-16 03:02:46,409 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7662337662337663 [2021-12-16 03:02:46,409 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 649 transitions. [2021-12-16 03:02:46,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 649 transitions. [2021-12-16 03:02:46,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:46,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 649 transitions. [2021-12-16 03:02:46,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.71428571428571) internal successors, (649), 7 states have internal predecessors, (649), 0 states have call successors, (0), 0 states 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 03:02:46,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 121.0) internal successors, (968), 8 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 03:02:46,415 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 121.0) internal successors, (968), 8 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 03:02:46,415 INFO L186 Difference]: Start difference. First operand has 105 places, 101 transitions, 206 flow. Second operand 7 states and 649 transitions. [2021-12-16 03:02:46,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 110 transitions, 291 flow [2021-12-16 03:02:46,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 110 transitions, 291 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-16 03:02:46,418 INFO L242 Difference]: Finished difference. Result has 111 places, 103 transitions, 233 flow [2021-12-16 03:02:46,419 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=233, PETRI_PLACES=111, PETRI_TRANSITIONS=103} [2021-12-16 03:02:46,419 INFO L334 CegarLoopForPetriNet]: 108 programPoint places, 3 predicate places. [2021-12-16 03:02:46,419 INFO L470 AbstractCegarLoop]: Abstraction has has 111 places, 103 transitions, 233 flow [2021-12-16 03:02:46,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states 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 03:02:46,420 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:46,420 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:02:46,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 03:02:46,421 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:46,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:46,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1275531432, now seen corresponding path program 1 times [2021-12-16 03:02:46,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:46,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216975294] [2021-12-16 03:02:46,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:46,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:46,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:46,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216975294] [2021-12-16 03:02:46,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216975294] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:46,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:46,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:02:46,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841439476] [2021-12-16 03:02:46,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:46,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:02:46,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:46,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:02:46,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:02:46,532 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 121 [2021-12-16 03:02:46,533 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 103 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 85.5) internal successors, (513), 6 states have internal predecessors, (513), 0 states have call successors, (0), 0 states 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 03:02:46,533 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:46,533 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 121 [2021-12-16 03:02:46,533 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:46,687 INFO L129 PetriNetUnfolder]: 102/422 cut-off events. [2021-12-16 03:02:46,687 INFO L130 PetriNetUnfolder]: For 22/29 co-relation queries the response was YES. [2021-12-16 03:02:46,690 INFO L84 FinitePrefix]: Finished finitePrefix Result has 698 conditions, 422 events. 102/422 cut-off events. For 22/29 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2053 event pairs, 12 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 691. Up to 72 conditions per place. [2021-12-16 03:02:46,692 INFO L132 encePairwiseOnDemand]: 112/121 looper letters, 47 selfloop transitions, 10 changer transitions 1/131 dead transitions. [2021-12-16 03:02:46,692 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 131 transitions, 419 flow [2021-12-16 03:02:46,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:02:46,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:02:46,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 627 transitions. [2021-12-16 03:02:46,695 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7402597402597403 [2021-12-16 03:02:46,695 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 627 transitions. [2021-12-16 03:02:46,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 627 transitions. [2021-12-16 03:02:46,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:46,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 627 transitions. [2021-12-16 03:02:46,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.57142857142857) internal successors, (627), 7 states have internal predecessors, (627), 0 states have call successors, (0), 0 states 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 03:02:46,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 121.0) internal successors, (968), 8 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 03:02:46,700 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 121.0) internal successors, (968), 8 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 03:02:46,700 INFO L186 Difference]: Start difference. First operand has 111 places, 103 transitions, 233 flow. Second operand 7 states and 627 transitions. [2021-12-16 03:02:46,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 131 transitions, 419 flow [2021-12-16 03:02:46,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 131 transitions, 404 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-12-16 03:02:46,707 INFO L242 Difference]: Finished difference. Result has 114 places, 109 transitions, 284 flow [2021-12-16 03:02:46,708 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=284, PETRI_PLACES=114, PETRI_TRANSITIONS=109} [2021-12-16 03:02:46,710 INFO L334 CegarLoopForPetriNet]: 108 programPoint places, 6 predicate places. [2021-12-16 03:02:46,710 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 109 transitions, 284 flow [2021-12-16 03:02:46,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.5) internal successors, (513), 6 states have internal predecessors, (513), 0 states have call successors, (0), 0 states 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 03:02:46,711 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:46,711 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:02:46,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 03:02:46,714 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:46,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:46,720 INFO L85 PathProgramCache]: Analyzing trace with hash 4800180, now seen corresponding path program 2 times [2021-12-16 03:02:46,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:46,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250416612] [2021-12-16 03:02:46,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:46,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:46,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:46,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250416612] [2021-12-16 03:02:46,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250416612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:02:46,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:02:46,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:02:46,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179945783] [2021-12-16 03:02:46,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:02:46,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:02:46,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:46,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:02:46,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:02:46,853 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 121 [2021-12-16 03:02:46,854 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 109 transitions, 284 flow. Second operand has 6 states, 6 states have (on average 85.5) internal successors, (513), 6 states have internal predecessors, (513), 0 states have call successors, (0), 0 states 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 03:02:46,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:46,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 121 [2021-12-16 03:02:46,854 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:46,983 INFO L129 PetriNetUnfolder]: 94/396 cut-off events. [2021-12-16 03:02:46,983 INFO L130 PetriNetUnfolder]: For 166/173 co-relation queries the response was YES. [2021-12-16 03:02:46,985 INFO L84 FinitePrefix]: Finished finitePrefix Result has 789 conditions, 396 events. 94/396 cut-off events. For 166/173 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1859 event pairs, 12 based on Foata normal form. 3/380 useless extension candidates. Maximal degree in co-relation 781. Up to 96 conditions per place. [2021-12-16 03:02:46,988 INFO L132 encePairwiseOnDemand]: 112/121 looper letters, 40 selfloop transitions, 12 changer transitions 6/131 dead transitions. [2021-12-16 03:02:46,989 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 131 transitions, 495 flow [2021-12-16 03:02:46,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:02:46,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:02:46,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 620 transitions. [2021-12-16 03:02:46,991 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.731995277449823 [2021-12-16 03:02:46,991 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 620 transitions. [2021-12-16 03:02:46,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 620 transitions. [2021-12-16 03:02:46,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:46,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 620 transitions. [2021-12-16 03:02:46,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.57142857142857) internal successors, (620), 7 states have internal predecessors, (620), 0 states have call successors, (0), 0 states 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 03:02:46,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 121.0) internal successors, (968), 8 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 03:02:46,996 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 121.0) internal successors, (968), 8 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 03:02:46,997 INFO L186 Difference]: Start difference. First operand has 114 places, 109 transitions, 284 flow. Second operand 7 states and 620 transitions. [2021-12-16 03:02:46,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 131 transitions, 495 flow [2021-12-16 03:02:47,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 131 transitions, 491 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-16 03:02:47,005 INFO L242 Difference]: Finished difference. Result has 121 places, 115 transitions, 365 flow [2021-12-16 03:02:47,006 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=365, PETRI_PLACES=121, PETRI_TRANSITIONS=115} [2021-12-16 03:02:47,007 INFO L334 CegarLoopForPetriNet]: 108 programPoint places, 13 predicate places. [2021-12-16 03:02:47,007 INFO L470 AbstractCegarLoop]: Abstraction has has 121 places, 115 transitions, 365 flow [2021-12-16 03:02:47,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.5) internal successors, (513), 6 states have internal predecessors, (513), 0 states have call successors, (0), 0 states 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 03:02:47,008 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:47,008 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:02:47,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 03:02:47,008 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:47,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:47,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1191680844, now seen corresponding path program 1 times [2021-12-16 03:02:47,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:47,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285281904] [2021-12-16 03:02:47,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:47,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:47,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:47,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285281904] [2021-12-16 03:02:47,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285281904] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:02:47,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762161853] [2021-12-16 03:02:47,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:47,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:47,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:02:47,651 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 03:02:47,674 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 03:02:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:47,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 03:02:47,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:02:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:48,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:02:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:49,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762161853] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:02:49,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:02:49,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2021-12-16 03:02:49,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990594062] [2021-12-16 03:02:49,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:02:49,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-16 03:02:49,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:02:49,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-16 03:02:49,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-12-16 03:02:49,254 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 121 [2021-12-16 03:02:49,256 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 115 transitions, 365 flow. Second operand has 28 states, 28 states have (on average 75.42857142857143) internal successors, (2112), 28 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states 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 03:02:49,256 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:02:49,256 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 121 [2021-12-16 03:02:49,256 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:02:50,482 INFO L129 PetriNetUnfolder]: 186/776 cut-off events. [2021-12-16 03:02:50,482 INFO L130 PetriNetUnfolder]: For 790/815 co-relation queries the response was YES. [2021-12-16 03:02:50,485 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1822 conditions, 776 events. 186/776 cut-off events. For 790/815 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4989 event pairs, 37 based on Foata normal form. 7/742 useless extension candidates. Maximal degree in co-relation 1810. Up to 165 conditions per place. [2021-12-16 03:02:50,488 INFO L132 encePairwiseOnDemand]: 104/121 looper letters, 97 selfloop transitions, 33 changer transitions 13/210 dead transitions. [2021-12-16 03:02:50,488 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 210 transitions, 1084 flow [2021-12-16 03:02:50,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 03:02:50,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-12-16 03:02:50,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1798 transitions. [2021-12-16 03:02:50,494 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6460653970535394 [2021-12-16 03:02:50,494 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1798 transitions. [2021-12-16 03:02:50,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1798 transitions. [2021-12-16 03:02:50,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:02:50,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1798 transitions. [2021-12-16 03:02:50,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 78.17391304347827) internal successors, (1798), 23 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states 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 03:02:50,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 121.0) internal successors, (2904), 24 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states 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 03:02:50,505 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 121.0) internal successors, (2904), 24 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states 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 03:02:50,505 INFO L186 Difference]: Start difference. First operand has 121 places, 115 transitions, 365 flow. Second operand 23 states and 1798 transitions. [2021-12-16 03:02:50,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 210 transitions, 1084 flow [2021-12-16 03:02:50,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 210 transitions, 1074 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-12-16 03:02:50,514 INFO L242 Difference]: Finished difference. Result has 154 places, 142 transitions, 628 flow [2021-12-16 03:02:50,514 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=628, PETRI_PLACES=154, PETRI_TRANSITIONS=142} [2021-12-16 03:02:50,515 INFO L334 CegarLoopForPetriNet]: 108 programPoint places, 46 predicate places. [2021-12-16 03:02:50,515 INFO L470 AbstractCegarLoop]: Abstraction has has 154 places, 142 transitions, 628 flow [2021-12-16 03:02:50,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 75.42857142857143) internal successors, (2112), 28 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states 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 03:02:50,516 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:02:50,516 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:02:50,546 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 03:02:50,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:50,744 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:02:50,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:02:50,744 INFO L85 PathProgramCache]: Analyzing trace with hash 852197858, now seen corresponding path program 2 times [2021-12-16 03:02:50,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:02:50,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262968247] [2021-12-16 03:02:50,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:02:50,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:02:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:02:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:02:51,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:02:51,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262968247] [2021-12-16 03:02:51,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262968247] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:02:51,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198942984] [2021-12-16 03:02:51,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:02:51,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:02:51,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:02:51,216 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 03:02:51,234 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 03:02:51,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:02:51,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:02:51,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 03:02:51,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:03:01,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:01,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:03:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:02,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198942984] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:03:02,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:03:02,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 29 [2021-12-16 03:03:02,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063860954] [2021-12-16 03:03:02,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:03:02,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 03:03:02,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:03:02,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 03:03:02,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=640, Unknown=4, NotChecked=0, Total=812 [2021-12-16 03:03:02,587 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 121 [2021-12-16 03:03:02,589 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 142 transitions, 628 flow. Second operand has 29 states, 29 states have (on average 75.3103448275862) internal successors, (2184), 29 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states 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 03:03:02,590 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:03:02,590 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 121 [2021-12-16 03:03:02,590 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:03:18,848 INFO L129 PetriNetUnfolder]: 355/1470 cut-off events. [2021-12-16 03:03:18,848 INFO L130 PetriNetUnfolder]: For 2900/3054 co-relation queries the response was YES. [2021-12-16 03:03:18,854 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4171 conditions, 1470 events. 355/1470 cut-off events. For 2900/3054 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 10978 event pairs, 46 based on Foata normal form. 44/1466 useless extension candidates. Maximal degree in co-relation 4146. Up to 243 conditions per place. [2021-12-16 03:03:18,862 INFO L132 encePairwiseOnDemand]: 105/121 looper letters, 167 selfloop transitions, 68 changer transitions 20/322 dead transitions. [2021-12-16 03:03:18,862 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 322 transitions, 2277 flow [2021-12-16 03:03:18,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-16 03:03:18,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-16 03:03:18,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2228 transitions. [2021-12-16 03:03:18,868 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6576151121605667 [2021-12-16 03:03:18,868 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2228 transitions. [2021-12-16 03:03:18,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2228 transitions. [2021-12-16 03:03:18,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:03:18,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2228 transitions. [2021-12-16 03:03:18,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 79.57142857142857) internal successors, (2228), 28 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states 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 03:03:18,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 121.0) internal successors, (3509), 29 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states 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 03:03:18,883 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 121.0) internal successors, (3509), 29 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states 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 03:03:18,883 INFO L186 Difference]: Start difference. First operand has 154 places, 142 transitions, 628 flow. Second operand 28 states and 2228 transitions. [2021-12-16 03:03:18,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 322 transitions, 2277 flow [2021-12-16 03:03:18,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 322 transitions, 2139 flow, removed 63 selfloop flow, removed 11 redundant places. [2021-12-16 03:03:18,901 INFO L242 Difference]: Finished difference. Result has 181 places, 186 transitions, 1136 flow [2021-12-16 03:03:18,902 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1136, PETRI_PLACES=181, PETRI_TRANSITIONS=186} [2021-12-16 03:03:18,904 INFO L334 CegarLoopForPetriNet]: 108 programPoint places, 73 predicate places. [2021-12-16 03:03:18,904 INFO L470 AbstractCegarLoop]: Abstraction has has 181 places, 186 transitions, 1136 flow [2021-12-16 03:03:18,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 75.3103448275862) internal successors, (2184), 29 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states 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 03:03:18,905 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:03:18,906 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:03:18,933 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 03:03:19,128 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,SelfDestructingSolverStorable5 [2021-12-16 03:03:19,128 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:03:19,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:03:19,129 INFO L85 PathProgramCache]: Analyzing trace with hash -267840008, now seen corresponding path program 3 times [2021-12-16 03:03:19,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:03:19,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804904407] [2021-12-16 03:03:19,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:19,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:03:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:19,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:03:19,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804904407] [2021-12-16 03:03:19,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804904407] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:03:19,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694161234] [2021-12-16 03:03:19,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 03:03:19,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:03:19,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:03:19,704 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 03:03:19,713 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 03:03:19,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-16 03:03:19,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:03:19,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 03:03:19,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:03:30,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:30,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:03:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:31,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694161234] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:03:31,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:03:31,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 29 [2021-12-16 03:03:31,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101417694] [2021-12-16 03:03:31,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:03:31,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 03:03:31,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:03:31,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 03:03:31,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=648, Unknown=4, NotChecked=0, Total=812 [2021-12-16 03:03:31,285 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 121 [2021-12-16 03:03:31,287 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 186 transitions, 1136 flow. Second operand has 29 states, 29 states have (on average 75.3103448275862) internal successors, (2184), 29 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states 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 03:03:31,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:03:31,288 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 121 [2021-12-16 03:03:31,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:03:49,827 INFO L129 PetriNetUnfolder]: 452/1862 cut-off events. [2021-12-16 03:03:49,828 INFO L130 PetriNetUnfolder]: For 5729/5999 co-relation queries the response was YES. [2021-12-16 03:03:49,840 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6066 conditions, 1862 events. 452/1862 cut-off events. For 5729/5999 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 15141 event pairs, 89 based on Foata normal form. 58/1862 useless extension candidates. Maximal degree in co-relation 6030. Up to 269 conditions per place. [2021-12-16 03:03:49,874 INFO L132 encePairwiseOnDemand]: 105/121 looper letters, 147 selfloop transitions, 82 changer transitions 16/312 dead transitions. [2021-12-16 03:03:49,874 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 312 transitions, 2618 flow [2021-12-16 03:03:49,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 03:03:49,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-12-16 03:03:49,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1812 transitions. [2021-12-16 03:03:49,882 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.651095939633489 [2021-12-16 03:03:49,882 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1812 transitions. [2021-12-16 03:03:49,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1812 transitions. [2021-12-16 03:03:49,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:03:49,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1812 transitions. [2021-12-16 03:03:49,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 78.78260869565217) internal successors, (1812), 23 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states 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 03:03:49,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 121.0) internal successors, (2904), 24 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states 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 03:03:49,894 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 121.0) internal successors, (2904), 24 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states 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 03:03:49,894 INFO L186 Difference]: Start difference. First operand has 181 places, 186 transitions, 1136 flow. Second operand 23 states and 1812 transitions. [2021-12-16 03:03:49,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 312 transitions, 2618 flow [2021-12-16 03:03:49,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 312 transitions, 2493 flow, removed 46 selfloop flow, removed 17 redundant places. [2021-12-16 03:03:49,920 INFO L242 Difference]: Finished difference. Result has 189 places, 221 transitions, 1700 flow [2021-12-16 03:03:49,920 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1700, PETRI_PLACES=189, PETRI_TRANSITIONS=221} [2021-12-16 03:03:49,921 INFO L334 CegarLoopForPetriNet]: 108 programPoint places, 81 predicate places. [2021-12-16 03:03:49,921 INFO L470 AbstractCegarLoop]: Abstraction has has 189 places, 221 transitions, 1700 flow [2021-12-16 03:03:49,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 75.3103448275862) internal successors, (2184), 29 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states 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 03:03:49,922 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:03:49,922 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:03:49,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-16 03:03:50,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:03:50,148 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:03:50,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:03:50,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2028189439, now seen corresponding path program 1 times [2021-12-16 03:03:50,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:03:50,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965002444] [2021-12-16 03:03:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:50,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:03:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:50,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:03:50,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965002444] [2021-12-16 03:03:50,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965002444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:03:50,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:03:50,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:03:50,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273205997] [2021-12-16 03:03:50,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:03:50,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:03:50,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:03:50,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:03:50,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:03:50,233 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 121 [2021-12-16 03:03:50,233 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 221 transitions, 1700 flow. Second operand has 6 states, 6 states have (on average 85.5) internal successors, (513), 6 states have internal predecessors, (513), 0 states have call successors, (0), 0 states 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 03:03:50,234 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:03:50,234 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 121 [2021-12-16 03:03:50,234 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:03:50,726 INFO L129 PetriNetUnfolder]: 680/2491 cut-off events. [2021-12-16 03:03:50,726 INFO L130 PetriNetUnfolder]: For 7702/7778 co-relation queries the response was YES. [2021-12-16 03:03:50,740 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7878 conditions, 2491 events. 680/2491 cut-off events. For 7702/7778 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 21681 event pairs, 147 based on Foata normal form. 35/2488 useless extension candidates. Maximal degree in co-relation 7839. Up to 583 conditions per place. [2021-12-16 03:03:50,750 INFO L132 encePairwiseOnDemand]: 112/121 looper letters, 56 selfloop transitions, 14 changer transitions 3/248 dead transitions. [2021-12-16 03:03:50,750 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 248 transitions, 2013 flow [2021-12-16 03:03:50,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:03:50,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:03:50,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 625 transitions. [2021-12-16 03:03:50,754 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7378984651711924 [2021-12-16 03:03:50,754 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 625 transitions. [2021-12-16 03:03:50,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 625 transitions. [2021-12-16 03:03:50,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:03:50,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 625 transitions. [2021-12-16 03:03:50,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.28571428571429) internal successors, (625), 7 states have internal predecessors, (625), 0 states have call successors, (0), 0 states 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 03:03:50,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 121.0) internal successors, (968), 8 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 03:03:50,759 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 121.0) internal successors, (968), 8 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 03:03:50,759 INFO L186 Difference]: Start difference. First operand has 189 places, 221 transitions, 1700 flow. Second operand 7 states and 625 transitions. [2021-12-16 03:03:50,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 248 transitions, 2013 flow [2021-12-16 03:03:50,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 248 transitions, 1903 flow, removed 30 selfloop flow, removed 17 redundant places. [2021-12-16 03:03:50,787 INFO L242 Difference]: Finished difference. Result has 177 places, 225 transitions, 1693 flow [2021-12-16 03:03:50,787 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=1602, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1693, PETRI_PLACES=177, PETRI_TRANSITIONS=225} [2021-12-16 03:03:50,790 INFO L334 CegarLoopForPetriNet]: 108 programPoint places, 69 predicate places. [2021-12-16 03:03:50,790 INFO L470 AbstractCegarLoop]: Abstraction has has 177 places, 225 transitions, 1693 flow [2021-12-16 03:03:50,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.5) internal successors, (513), 6 states have internal predecessors, (513), 0 states have call successors, (0), 0 states 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 03:03:50,790 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:03:50,791 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:03:50,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 03:03:50,791 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:03:50,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:03:50,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1747601671, now seen corresponding path program 2 times [2021-12-16 03:03:50,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:03:50,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140986961] [2021-12-16 03:03:50,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:50,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:03:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:03:50,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:03:50,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140986961] [2021-12-16 03:03:50,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140986961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:03:50,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:03:50,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:03:50,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19644150] [2021-12-16 03:03:50,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:03:50,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:03:50,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:03:50,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:03:50,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:03:50,885 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 121 [2021-12-16 03:03:50,885 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 225 transitions, 1693 flow. Second operand has 6 states, 6 states have (on average 85.5) internal successors, (513), 6 states have internal predecessors, (513), 0 states have call successors, (0), 0 states 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 03:03:50,885 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:03:50,885 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 121 [2021-12-16 03:03:50,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:03:51,418 INFO L129 PetriNetUnfolder]: 684/2602 cut-off events. [2021-12-16 03:03:51,435 INFO L130 PetriNetUnfolder]: For 9878/9958 co-relation queries the response was YES. [2021-12-16 03:03:51,459 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8822 conditions, 2602 events. 684/2602 cut-off events. For 9878/9958 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 22867 event pairs, 207 based on Foata normal form. 22/2569 useless extension candidates. Maximal degree in co-relation 8785. Up to 751 conditions per place. [2021-12-16 03:03:51,500 INFO L132 encePairwiseOnDemand]: 112/121 looper letters, 49 selfloop transitions, 12 changer transitions 3/239 dead transitions. [2021-12-16 03:03:51,501 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 239 transitions, 1872 flow [2021-12-16 03:03:51,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:03:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:03:51,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 616 transitions. [2021-12-16 03:03:51,502 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7272727272727273 [2021-12-16 03:03:51,503 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 616 transitions. [2021-12-16 03:03:51,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 616 transitions. [2021-12-16 03:03:51,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:03:51,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 616 transitions. [2021-12-16 03:03:51,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 0 states have call successors, (0), 0 states 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 03:03:51,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 121.0) internal successors, (968), 8 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 03:03:51,507 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 121.0) internal successors, (968), 8 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 03:03:51,507 INFO L186 Difference]: Start difference. First operand has 177 places, 225 transitions, 1693 flow. Second operand 7 states and 616 transitions. [2021-12-16 03:03:51,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 239 transitions, 1872 flow [2021-12-16 03:03:51,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 239 transitions, 1851 flow, removed 7 selfloop flow, removed 3 redundant places. [2021-12-16 03:03:51,558 INFO L242 Difference]: Finished difference. Result has 182 places, 226 transitions, 1704 flow [2021-12-16 03:03:51,558 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=1640, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1704, PETRI_PLACES=182, PETRI_TRANSITIONS=226} [2021-12-16 03:03:51,559 INFO L334 CegarLoopForPetriNet]: 108 programPoint places, 74 predicate places. [2021-12-16 03:03:51,559 INFO L470 AbstractCegarLoop]: Abstraction has has 182 places, 226 transitions, 1704 flow [2021-12-16 03:03:51,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.5) internal successors, (513), 6 states have internal predecessors, (513), 0 states have call successors, (0), 0 states 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 03:03:51,559 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:03:51,560 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:03:51,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 03:03:51,560 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:03:51,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:03:51,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2081332391, now seen corresponding path program 1 times [2021-12-16 03:03:51,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:03:51,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794036230] [2021-12-16 03:03:51,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:51,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:03:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:52,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:03:52,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794036230] [2021-12-16 03:03:52,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794036230] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:03:52,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534760233] [2021-12-16 03:03:52,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:52,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:03:52,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:03:52,288 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 03:03:52,289 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 03:03:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:52,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 03:03:52,470 INFO L286 TraceCheckSpWp]: Computing forward predicates...