./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/mult-comm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/mult-comm.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 a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:43:10,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:43:10,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:43:10,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:43:10,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:43:10,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:43:10,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:43:10,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:43:10,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:43:10,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:43:10,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:43:10,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:43:10,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:43:10,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:43:10,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:43:10,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:43:10,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:43:10,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:43:10,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:43:10,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:43:10,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:43:10,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:43:10,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:43:10,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:43:10,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:43:10,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:43:10,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:43:10,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:43:10,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:43:10,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:43:10,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:43:10,437 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:43:10,438 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:43:10,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:43:10,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:43:10,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:43:10,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:43:10,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:43:10,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:43:10,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:43:10,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:43:10,444 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:43:10,462 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:43:10,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:43:10,463 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:43:10,463 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:43:10,463 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:43:10,464 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:43:10,464 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:43:10,464 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:43:10,464 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:43:10,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:43:10,465 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:43:10,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:43:10,465 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:43:10,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:43:10,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:43:10,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:43:10,466 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:43:10,466 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:43:10,466 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:43:10,466 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:43:10,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:43:10,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:43:10,467 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:43:10,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:43:10,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:43:10,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:43:10,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:43:10,467 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:43:10,468 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:43:10,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:43:10,468 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:43:10,468 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:43:10,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:43:10,468 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:43:10,468 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e [2021-12-22 13:43:10,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:43:10,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:43:10,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:43:10,665 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:43:10,665 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:43:10,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/mult-comm.wvr.c [2021-12-22 13:43:10,729 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6437d2ec5/45484beddc344b47976c8272d684ff38/FLAG0247bfa0e [2021-12-22 13:43:11,079 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:43:11,080 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-comm.wvr.c [2021-12-22 13:43:11,084 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6437d2ec5/45484beddc344b47976c8272d684ff38/FLAG0247bfa0e [2021-12-22 13:43:11,507 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6437d2ec5/45484beddc344b47976c8272d684ff38 [2021-12-22 13:43:11,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:43:11,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:43:11,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:43:11,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:43:11,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:43:11,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:43:11" (1/1) ... [2021-12-22 13:43:11,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3440046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:11, skipping insertion in model container [2021-12-22 13:43:11,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:43:11" (1/1) ... [2021-12-22 13:43:11,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:43:11,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:43:11,662 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/mult-comm.wvr.c[1910,1923] [2021-12-22 13:43:11,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:43:11,671 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:43:11,694 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/mult-comm.wvr.c[1910,1923] [2021-12-22 13:43:11,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:43:11,709 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:43:11,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:11 WrapperNode [2021-12-22 13:43:11,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:43:11,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:43:11,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:43:11,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:43:11,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:11" (1/1) ... [2021-12-22 13:43:11,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:11" (1/1) ... [2021-12-22 13:43:11,740 INFO L137 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2021-12-22 13:43:11,740 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:43:11,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:43:11,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:43:11,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:43:11,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:11" (1/1) ... [2021-12-22 13:43:11,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:11" (1/1) ... [2021-12-22 13:43:11,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:11" (1/1) ... [2021-12-22 13:43:11,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:11" (1/1) ... [2021-12-22 13:43:11,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:11" (1/1) ... [2021-12-22 13:43:11,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:11" (1/1) ... [2021-12-22 13:43:11,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:11" (1/1) ... [2021-12-22 13:43:11,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:43:11,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:43:11,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:43:11,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:43:11,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:11" (1/1) ... [2021-12-22 13:43:11,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:43:11,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:43:11,808 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 13:43:11,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 13:43:11,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:43:11,836 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-22 13:43:11,836 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-22 13:43:11,836 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-22 13:43:11,836 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-22 13:43:11,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:43:11,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:43:11,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:43:11,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:43:11,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:43:11,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:43:11,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:43:11,838 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-22 13:43:11,901 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:43:11,902 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:43:12,022 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:43:12,038 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:43:12,039 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 13:43:12,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:43:12 BoogieIcfgContainer [2021-12-22 13:43:12,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:43:12,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:43:12,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:43:12,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:43:12,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:43:11" (1/3) ... [2021-12-22 13:43:12,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@411a1257 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:43:12, skipping insertion in model container [2021-12-22 13:43:12,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:43:11" (2/3) ... [2021-12-22 13:43:12,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@411a1257 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:43:12, skipping insertion in model container [2021-12-22 13:43:12,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:43:12" (3/3) ... [2021-12-22 13:43:12,047 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2021-12-22 13:43:12,050 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:43:12,050 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:43:12,050 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:43:12,050 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:43:12,072 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,073 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,073 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,074 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,079 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,080 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,080 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,080 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,080 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,081 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,081 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,081 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,081 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,081 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,081 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,082 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,082 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,082 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,082 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,082 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,082 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,082 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,083 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,083 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,083 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,084 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,084 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,085 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,085 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,085 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,085 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,085 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,086 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,086 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,088 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,088 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,088 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,088 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,090 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,090 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,090 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,090 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:43:12,093 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-22 13:43:12,135 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:43:12,144 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 13:43:12,145 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-22 13:43:12,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 80 transitions, 176 flow [2021-12-22 13:43:12,207 INFO L129 PetriNetUnfolder]: 5/78 cut-off events. [2021-12-22 13:43:12,209 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:43:12,213 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 78 events. 5/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2021-12-22 13:43:12,213 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 80 transitions, 176 flow [2021-12-22 13:43:12,217 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 69 transitions, 150 flow [2021-12-22 13:43:12,250 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2021-12-22 13:43:12,250 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:43:12,251 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:12,252 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] [2021-12-22 13:43:12,252 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:12,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:12,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1776550383, now seen corresponding path program 1 times [2021-12-22 13:43:12,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:12,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011437610] [2021-12-22 13:43:12,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:12,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:12,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:12,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011437610] [2021-12-22 13:43:12,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011437610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:12,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:12,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:43:12,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290264512] [2021-12-22 13:43:12,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:12,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 13:43:12,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:12,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 13:43:12,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:43:12,475 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 80 [2021-12-22 13:43:12,482 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 150 flow. Second operand has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:12,482 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:12,482 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 80 [2021-12-22 13:43:12,483 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:12,512 INFO L129 PetriNetUnfolder]: 2/66 cut-off events. [2021-12-22 13:43:12,513 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-22 13:43:12,513 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 66 events. 2/66 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 5/68 useless extension candidates. Maximal degree in co-relation 43. Up to 5 conditions per place. [2021-12-22 13:43:12,514 INFO L132 encePairwiseOnDemand]: 77/80 looper letters, 4 selfloop transitions, 0 changer transitions 1/66 dead transitions. [2021-12-22 13:43:12,515 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 66 transitions, 152 flow [2021-12-22 13:43:12,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 13:43:12,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-22 13:43:12,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 151 transitions. [2021-12-22 13:43:12,527 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.94375 [2021-12-22 13:43:12,528 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 151 transitions. [2021-12-22 13:43:12,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 151 transitions. [2021-12-22 13:43:12,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:12,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 151 transitions. [2021-12-22 13:43:12,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:12,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:12,541 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:12,542 INFO L186 Difference]: Start difference. First operand has 71 places, 69 transitions, 150 flow. Second operand 2 states and 151 transitions. [2021-12-22 13:43:12,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 66 transitions, 152 flow [2021-12-22 13:43:12,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 144 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-22 13:43:12,549 INFO L242 Difference]: Finished difference. Result has 68 places, 65 transitions, 134 flow [2021-12-22 13:43:12,551 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2021-12-22 13:43:12,554 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2021-12-22 13:43:12,554 INFO L470 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 134 flow [2021-12-22 13:43:12,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:12,555 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:12,555 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] [2021-12-22 13:43:12,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:43:12,555 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:12,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:12,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1061161231, now seen corresponding path program 1 times [2021-12-22 13:43:12,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:12,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052165934] [2021-12-22 13:43:12,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:12,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:12,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:12,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:12,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052165934] [2021-12-22 13:43:12,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052165934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:12,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:12,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:43:12,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915169561] [2021-12-22 13:43:12,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:12,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:43:12,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:12,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:43:12,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:43:12,755 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 80 [2021-12-22 13:43:12,755 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:12,756 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:12,756 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 80 [2021-12-22 13:43:12,756 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:12,855 INFO L129 PetriNetUnfolder]: 12/126 cut-off events. [2021-12-22 13:43:12,856 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-22 13:43:12,857 INFO L84 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 126 events. 12/126 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 298 event pairs, 1 based on Foata normal form. 1/120 useless extension candidates. Maximal degree in co-relation 166. Up to 19 conditions per place. [2021-12-22 13:43:12,858 INFO L132 encePairwiseOnDemand]: 73/80 looper letters, 19 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2021-12-22 13:43:12,858 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 227 flow [2021-12-22 13:43:12,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:43:12,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:43:12,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 407 transitions. [2021-12-22 13:43:12,863 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8479166666666667 [2021-12-22 13:43:12,864 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 407 transitions. [2021-12-22 13:43:12,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 407 transitions. [2021-12-22 13:43:12,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:12,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 407 transitions. [2021-12-22 13:43:12,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 67.83333333333333) internal successors, (407), 6 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:12,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:12,869 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:12,869 INFO L186 Difference]: Start difference. First operand has 68 places, 65 transitions, 134 flow. Second operand 6 states and 407 transitions. [2021-12-22 13:43:12,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 227 flow [2021-12-22 13:43:12,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 227 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:43:12,872 INFO L242 Difference]: Finished difference. Result has 75 places, 68 transitions, 163 flow [2021-12-22 13:43:12,872 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2021-12-22 13:43:12,872 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2021-12-22 13:43:12,873 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 163 flow [2021-12-22 13:43:12,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:12,873 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:12,873 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] [2021-12-22 13:43:12,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:43:12,874 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:12,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:12,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1738455513, now seen corresponding path program 1 times [2021-12-22 13:43:12,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:12,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686238341] [2021-12-22 13:43:12,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:12,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:13,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:13,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686238341] [2021-12-22 13:43:13,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686238341] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:43:13,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467667798] [2021-12-22 13:43:13,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:13,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:43:13,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:43:13,196 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:43:13,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:43:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:13,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 13:43:13,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:43:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:13,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:43:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:14,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467667798] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:43:14,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:43:14,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 17 [2021-12-22 13:43:14,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612154280] [2021-12-22 13:43:14,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:43:14,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-22 13:43:14,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:14,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-22 13:43:14,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:43:14,060 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2021-12-22 13:43:14,061 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 163 flow. Second operand has 17 states, 17 states have (on average 53.76470588235294) internal successors, (914), 17 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:14,061 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:14,061 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2021-12-22 13:43:14,061 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:14,448 INFO L129 PetriNetUnfolder]: 174/573 cut-off events. [2021-12-22 13:43:14,448 INFO L130 PetriNetUnfolder]: For 74/83 co-relation queries the response was YES. [2021-12-22 13:43:14,449 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1087 conditions, 573 events. 174/573 cut-off events. For 74/83 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3194 event pairs, 15 based on Foata normal form. 4/499 useless extension candidates. Maximal degree in co-relation 1080. Up to 82 conditions per place. [2021-12-22 13:43:14,451 INFO L132 encePairwiseOnDemand]: 67/80 looper letters, 93 selfloop transitions, 31 changer transitions 19/184 dead transitions. [2021-12-22 13:43:14,451 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 184 transitions, 763 flow [2021-12-22 13:43:14,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 13:43:14,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-22 13:43:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1217 transitions. [2021-12-22 13:43:14,454 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7244047619047619 [2021-12-22 13:43:14,454 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1217 transitions. [2021-12-22 13:43:14,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1217 transitions. [2021-12-22 13:43:14,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:14,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1217 transitions. [2021-12-22 13:43:14,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 57.95238095238095) internal successors, (1217), 21 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:14,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 80.0) internal successors, (1760), 22 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:14,459 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 80.0) internal successors, (1760), 22 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:14,459 INFO L186 Difference]: Start difference. First operand has 75 places, 68 transitions, 163 flow. Second operand 21 states and 1217 transitions. [2021-12-22 13:43:14,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 184 transitions, 763 flow [2021-12-22 13:43:14,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 184 transitions, 741 flow, removed 11 selfloop flow, removed 2 redundant places. [2021-12-22 13:43:14,463 INFO L242 Difference]: Finished difference. Result has 107 places, 92 transitions, 391 flow [2021-12-22 13:43:14,463 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=391, PETRI_PLACES=107, PETRI_TRANSITIONS=92} [2021-12-22 13:43:14,464 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 36 predicate places. [2021-12-22 13:43:14,464 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 92 transitions, 391 flow [2021-12-22 13:43:14,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 53.76470588235294) internal successors, (914), 17 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:14,464 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:14,464 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] [2021-12-22 13:43:14,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 13:43:14,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:43:14,685 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:14,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:14,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1154719639, now seen corresponding path program 1 times [2021-12-22 13:43:14,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:14,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350777959] [2021-12-22 13:43:14,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:14,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:14,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:14,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350777959] [2021-12-22 13:43:14,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350777959] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:43:14,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147306623] [2021-12-22 13:43:14,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:14,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:43:14,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:43:14,829 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) [2021-12-22 13:43:14,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:43:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:14,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 13:43:14,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:43:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:15,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:43:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:15,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147306623] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:43:15,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:43:15,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 13 [2021-12-22 13:43:15,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54709207] [2021-12-22 13:43:15,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:43:15,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 13:43:15,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:15,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 13:43:15,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-12-22 13:43:15,740 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2021-12-22 13:43:15,741 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 92 transitions, 391 flow. Second operand has 13 states, 13 states have (on average 58.07692307692308) internal successors, (755), 13 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:15,741 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:15,741 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2021-12-22 13:43:15,741 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:16,073 INFO L129 PetriNetUnfolder]: 74/389 cut-off events. [2021-12-22 13:43:16,074 INFO L130 PetriNetUnfolder]: For 403/428 co-relation queries the response was YES. [2021-12-22 13:43:16,076 INFO L84 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 389 events. 74/389 cut-off events. For 403/428 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2086 event pairs, 5 based on Foata normal form. 17/382 useless extension candidates. Maximal degree in co-relation 914. Up to 142 conditions per place. [2021-12-22 13:43:16,078 INFO L132 encePairwiseOnDemand]: 69/80 looper letters, 39 selfloop transitions, 10 changer transitions 11/114 dead transitions. [2021-12-22 13:43:16,078 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 114 transitions, 609 flow [2021-12-22 13:43:16,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:43:16,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:43:16,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 608 transitions. [2021-12-22 13:43:16,080 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.76 [2021-12-22 13:43:16,080 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 608 transitions. [2021-12-22 13:43:16,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 608 transitions. [2021-12-22 13:43:16,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:16,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 608 transitions. [2021-12-22 13:43:16,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 60.8) internal successors, (608), 10 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:16,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:16,084 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:16,084 INFO L186 Difference]: Start difference. First operand has 107 places, 92 transitions, 391 flow. Second operand 10 states and 608 transitions. [2021-12-22 13:43:16,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 114 transitions, 609 flow [2021-12-22 13:43:16,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 114 transitions, 533 flow, removed 29 selfloop flow, removed 10 redundant places. [2021-12-22 13:43:16,093 INFO L242 Difference]: Finished difference. Result has 104 places, 92 transitions, 368 flow [2021-12-22 13:43:16,094 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=368, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2021-12-22 13:43:16,095 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 33 predicate places. [2021-12-22 13:43:16,095 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 368 flow [2021-12-22 13:43:16,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 58.07692307692308) internal successors, (755), 13 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:16,095 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:16,096 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] [2021-12-22 13:43:16,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:43:16,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-22 13:43:16,308 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:16,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:16,308 INFO L85 PathProgramCache]: Analyzing trace with hash -837475069, now seen corresponding path program 2 times [2021-12-22 13:43:16,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:16,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31415529] [2021-12-22 13:43:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:16,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:16,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:16,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31415529] [2021-12-22 13:43:16,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31415529] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:43:16,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825652935] [2021-12-22 13:43:16,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:43:16,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:43:16,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:43:16,447 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) [2021-12-22 13:43:16,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:43:16,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:43:16,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:43:16,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 13:43:16,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:43:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:16,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:43:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:16,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825652935] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 13:43:16,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 13:43:16,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 10] total 16 [2021-12-22 13:43:16,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655271250] [2021-12-22 13:43:16,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:16,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:43:16,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:16,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:43:16,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:43:16,918 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2021-12-22 13:43:16,918 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 92 transitions, 368 flow. Second operand has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:16,918 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:16,918 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2021-12-22 13:43:16,918 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:17,107 INFO L129 PetriNetUnfolder]: 171/584 cut-off events. [2021-12-22 13:43:17,107 INFO L130 PetriNetUnfolder]: For 527/527 co-relation queries the response was YES. [2021-12-22 13:43:17,109 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 584 events. 171/584 cut-off events. For 527/527 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3358 event pairs, 62 based on Foata normal form. 1/579 useless extension candidates. Maximal degree in co-relation 1454. Up to 222 conditions per place. [2021-12-22 13:43:17,111 INFO L132 encePairwiseOnDemand]: 70/80 looper letters, 68 selfloop transitions, 24 changer transitions 6/139 dead transitions. [2021-12-22 13:43:17,111 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 139 transitions, 769 flow [2021-12-22 13:43:17,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:43:17,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-22 13:43:17,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 589 transitions. [2021-12-22 13:43:17,113 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.73625 [2021-12-22 13:43:17,113 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 589 transitions. [2021-12-22 13:43:17,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 589 transitions. [2021-12-22 13:43:17,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:17,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 589 transitions. [2021-12-22 13:43:17,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.9) internal successors, (589), 10 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:17,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:17,116 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:17,116 INFO L186 Difference]: Start difference. First operand has 104 places, 92 transitions, 368 flow. Second operand 10 states and 589 transitions. [2021-12-22 13:43:17,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 139 transitions, 769 flow [2021-12-22 13:43:17,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 139 transitions, 721 flow, removed 15 selfloop flow, removed 7 redundant places. [2021-12-22 13:43:17,120 INFO L242 Difference]: Finished difference. Result has 107 places, 100 transitions, 495 flow [2021-12-22 13:43:17,121 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=495, PETRI_PLACES=107, PETRI_TRANSITIONS=100} [2021-12-22 13:43:17,121 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 36 predicate places. [2021-12-22 13:43:17,121 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 100 transitions, 495 flow [2021-12-22 13:43:17,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:17,122 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:17,122 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] [2021-12-22 13:43:17,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 13:43:17,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:43:17,339 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:17,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:17,339 INFO L85 PathProgramCache]: Analyzing trace with hash 852200369, now seen corresponding path program 3 times [2021-12-22 13:43:17,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:17,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002402493] [2021-12-22 13:43:17,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:17,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:17,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:17,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002402493] [2021-12-22 13:43:17,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002402493] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:43:17,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305934668] [2021-12-22 13:43:17,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:43:17,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:43:17,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:43:17,444 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) [2021-12-22 13:43:17,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:43:17,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 13:43:17,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:43:17,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 13:43:17,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:43:17,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:17,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:43:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:17,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305934668] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 13:43:17,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 13:43:17,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 10] total 15 [2021-12-22 13:43:17,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621951049] [2021-12-22 13:43:17,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:17,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:43:17,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:17,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:43:17,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:43:17,923 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2021-12-22 13:43:17,924 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 100 transitions, 495 flow. Second operand has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:17,924 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:17,924 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2021-12-22 13:43:17,924 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:18,229 INFO L129 PetriNetUnfolder]: 171/587 cut-off events. [2021-12-22 13:43:18,229 INFO L130 PetriNetUnfolder]: For 907/907 co-relation queries the response was YES. [2021-12-22 13:43:18,231 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1644 conditions, 587 events. 171/587 cut-off events. For 907/907 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3422 event pairs, 70 based on Foata normal form. 2/581 useless extension candidates. Maximal degree in co-relation 1624. Up to 290 conditions per place. [2021-12-22 13:43:18,233 INFO L132 encePairwiseOnDemand]: 69/80 looper letters, 63 selfloop transitions, 11 changer transitions 14/129 dead transitions. [2021-12-22 13:43:18,233 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 129 transitions, 800 flow [2021-12-22 13:43:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:43:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:43:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 520 transitions. [2021-12-22 13:43:18,235 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2021-12-22 13:43:18,235 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 520 transitions. [2021-12-22 13:43:18,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 520 transitions. [2021-12-22 13:43:18,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:18,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 520 transitions. [2021-12-22 13:43:18,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.77777777777778) internal successors, (520), 9 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:18,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:18,238 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:18,238 INFO L186 Difference]: Start difference. First operand has 107 places, 100 transitions, 495 flow. Second operand 9 states and 520 transitions. [2021-12-22 13:43:18,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 129 transitions, 800 flow [2021-12-22 13:43:18,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 129 transitions, 762 flow, removed 11 selfloop flow, removed 5 redundant places. [2021-12-22 13:43:18,244 INFO L242 Difference]: Finished difference. Result has 112 places, 100 transitions, 498 flow [2021-12-22 13:43:18,244 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=498, PETRI_PLACES=112, PETRI_TRANSITIONS=100} [2021-12-22 13:43:18,244 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 41 predicate places. [2021-12-22 13:43:18,244 INFO L470 AbstractCegarLoop]: Abstraction has has 112 places, 100 transitions, 498 flow [2021-12-22 13:43:18,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:18,245 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:18,245 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] [2021-12-22 13:43:18,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 13:43:18,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:43:18,459 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:18,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:18,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1402773219, now seen corresponding path program 2 times [2021-12-22 13:43:18,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:18,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741002861] [2021-12-22 13:43:18,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:18,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:18,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:18,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741002861] [2021-12-22 13:43:18,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741002861] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:43:18,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134874279] [2021-12-22 13:43:18,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:43:18,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:43:18,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:43:18,591 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:43:18,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 13:43:18,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:43:18,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:43:18,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 13:43:18,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:43:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:18,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:43:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:19,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134874279] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:43:19,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:43:19,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2021-12-22 13:43:19,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757948118] [2021-12-22 13:43:19,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:43:19,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:43:19,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:19,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:43:19,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:43:19,128 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2021-12-22 13:43:19,129 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 100 transitions, 498 flow. Second operand has 14 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:19,129 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:19,129 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2021-12-22 13:43:19,129 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:19,490 INFO L129 PetriNetUnfolder]: 86/442 cut-off events. [2021-12-22 13:43:19,490 INFO L130 PetriNetUnfolder]: For 721/755 co-relation queries the response was YES. [2021-12-22 13:43:19,491 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1130 conditions, 442 events. 86/442 cut-off events. For 721/755 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2395 event pairs, 11 based on Foata normal form. 21/453 useless extension candidates. Maximal degree in co-relation 1108. Up to 138 conditions per place. [2021-12-22 13:43:19,492 INFO L132 encePairwiseOnDemand]: 70/80 looper letters, 45 selfloop transitions, 41 changer transitions 12/154 dead transitions. [2021-12-22 13:43:19,492 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 154 transitions, 981 flow [2021-12-22 13:43:19,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 13:43:19,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-22 13:43:19,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1026 transitions. [2021-12-22 13:43:19,495 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7544117647058823 [2021-12-22 13:43:19,495 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1026 transitions. [2021-12-22 13:43:19,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1026 transitions. [2021-12-22 13:43:19,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:19,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1026 transitions. [2021-12-22 13:43:19,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 60.35294117647059) internal successors, (1026), 17 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:19,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:19,499 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:19,500 INFO L186 Difference]: Start difference. First operand has 112 places, 100 transitions, 498 flow. Second operand 17 states and 1026 transitions. [2021-12-22 13:43:19,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 154 transitions, 981 flow [2021-12-22 13:43:19,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 154 transitions, 921 flow, removed 16 selfloop flow, removed 8 redundant places. [2021-12-22 13:43:19,505 INFO L242 Difference]: Finished difference. Result has 131 places, 121 transitions, 805 flow [2021-12-22 13:43:19,505 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=805, PETRI_PLACES=131, PETRI_TRANSITIONS=121} [2021-12-22 13:43:19,506 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 60 predicate places. [2021-12-22 13:43:19,506 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 121 transitions, 805 flow [2021-12-22 13:43:19,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:19,507 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:19,507 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:19,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-22 13:43:19,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:43:19,723 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:19,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:19,724 INFO L85 PathProgramCache]: Analyzing trace with hash -725373525, now seen corresponding path program 3 times [2021-12-22 13:43:19,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:19,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52682896] [2021-12-22 13:43:19,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:19,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:19,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:19,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52682896] [2021-12-22 13:43:19,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52682896] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:43:19,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54884598] [2021-12-22 13:43:19,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:43:19,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:43:19,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:43:19,852 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:43:19,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 13:43:19,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 13:43:19,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:43:19,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 13:43:19,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:43:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:20,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:43:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:20,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54884598] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:43:20,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:43:20,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2021-12-22 13:43:20,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504397610] [2021-12-22 13:43:20,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:43:20,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 13:43:20,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:20,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 13:43:20,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:43:20,303 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2021-12-22 13:43:20,304 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 121 transitions, 805 flow. Second operand has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:20,304 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:20,304 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2021-12-22 13:43:20,304 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:20,525 INFO L129 PetriNetUnfolder]: 101/536 cut-off events. [2021-12-22 13:43:20,526 INFO L130 PetriNetUnfolder]: For 1320/1372 co-relation queries the response was YES. [2021-12-22 13:43:20,528 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1596 conditions, 536 events. 101/536 cut-off events. For 1320/1372 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3179 event pairs, 14 based on Foata normal form. 25/552 useless extension candidates. Maximal degree in co-relation 1564. Up to 139 conditions per place. [2021-12-22 13:43:20,529 INFO L132 encePairwiseOnDemand]: 68/80 looper letters, 40 selfloop transitions, 61 changer transitions 9/166 dead transitions. [2021-12-22 13:43:20,530 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 166 transitions, 1359 flow [2021-12-22 13:43:20,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:43:20,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:43:20,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1077 transitions. [2021-12-22 13:43:20,532 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7479166666666667 [2021-12-22 13:43:20,532 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1077 transitions. [2021-12-22 13:43:20,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1077 transitions. [2021-12-22 13:43:20,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:20,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1077 transitions. [2021-12-22 13:43:20,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 59.833333333333336) internal successors, (1077), 18 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:20,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 80.0) internal successors, (1520), 19 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:20,537 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 80.0) internal successors, (1520), 19 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:20,537 INFO L186 Difference]: Start difference. First operand has 131 places, 121 transitions, 805 flow. Second operand 18 states and 1077 transitions. [2021-12-22 13:43:20,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 166 transitions, 1359 flow [2021-12-22 13:43:20,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 166 transitions, 1312 flow, removed 20 selfloop flow, removed 8 redundant places. [2021-12-22 13:43:20,544 INFO L242 Difference]: Finished difference. Result has 143 places, 143 transitions, 1157 flow [2021-12-22 13:43:20,544 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1157, PETRI_PLACES=143, PETRI_TRANSITIONS=143} [2021-12-22 13:43:20,545 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 72 predicate places. [2021-12-22 13:43:20,545 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 143 transitions, 1157 flow [2021-12-22 13:43:20,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:20,545 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:20,546 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:20,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 13:43:20,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:43:20,759 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:20,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:20,760 INFO L85 PathProgramCache]: Analyzing trace with hash -378455913, now seen corresponding path program 1 times [2021-12-22 13:43:20,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:20,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113295271] [2021-12-22 13:43:20,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:20,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:21,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:21,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113295271] [2021-12-22 13:43:21,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113295271] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:43:21,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462991602] [2021-12-22 13:43:21,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:21,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:43:21,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:43:21,462 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:43:21,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 13:43:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:21,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-22 13:43:21,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:43:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:22,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:44:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:44:11,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462991602] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:44:11,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:44:11,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 39 [2021-12-22 13:44:11,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405860483] [2021-12-22 13:44:11,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:44:11,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-22 13:44:11,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:44:11,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-22 13:44:11,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2021-12-22 13:44:11,012 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 80 [2021-12-22 13:44:11,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 143 transitions, 1157 flow. Second operand has 39 states, 39 states have (on average 48.666666666666664) internal successors, (1898), 39 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:11,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:44:11,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 80 [2021-12-22 13:44:11,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:44:16,001 INFO L129 PetriNetUnfolder]: 431/1402 cut-off events. [2021-12-22 13:44:16,001 INFO L130 PetriNetUnfolder]: For 4330/4330 co-relation queries the response was YES. [2021-12-22 13:44:16,005 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4854 conditions, 1402 events. 431/1402 cut-off events. For 4330/4330 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10650 event pairs, 44 based on Foata normal form. 1/1399 useless extension candidates. Maximal degree in co-relation 4818. Up to 329 conditions per place. [2021-12-22 13:44:16,011 INFO L132 encePairwiseOnDemand]: 57/80 looper letters, 129 selfloop transitions, 198 changer transitions 24/388 dead transitions. [2021-12-22 13:44:16,011 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 388 transitions, 3572 flow [2021-12-22 13:44:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-22 13:44:16,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-12-22 13:44:16,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2632 transitions. [2021-12-22 13:44:16,016 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6450980392156863 [2021-12-22 13:44:16,016 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2632 transitions. [2021-12-22 13:44:16,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2632 transitions. [2021-12-22 13:44:16,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:44:16,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2632 transitions. [2021-12-22 13:44:16,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 51.6078431372549) internal successors, (2632), 51 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:16,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 80.0) internal successors, (4160), 52 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:16,029 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 80.0) internal successors, (4160), 52 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:16,029 INFO L186 Difference]: Start difference. First operand has 143 places, 143 transitions, 1157 flow. Second operand 51 states and 2632 transitions. [2021-12-22 13:44:16,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 388 transitions, 3572 flow [2021-12-22 13:44:16,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 388 transitions, 3245 flow, removed 47 selfloop flow, removed 10 redundant places. [2021-12-22 13:44:16,046 INFO L242 Difference]: Finished difference. Result has 199 places, 278 transitions, 2731 flow [2021-12-22 13:44:16,047 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=2731, PETRI_PLACES=199, PETRI_TRANSITIONS=278} [2021-12-22 13:44:16,048 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 128 predicate places. [2021-12-22 13:44:16,048 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 278 transitions, 2731 flow [2021-12-22 13:44:16,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 48.666666666666664) internal successors, (1898), 39 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:16,049 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:44:16,049 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:44:16,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 13:44:16,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:44:16,263 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:44:16,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:44:16,264 INFO L85 PathProgramCache]: Analyzing trace with hash 904298003, now seen corresponding path program 2 times [2021-12-22 13:44:16,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:44:16,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192436788] [2021-12-22 13:44:16,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:44:16,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:44:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:44:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:44:16,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:44:16,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192436788] [2021-12-22 13:44:16,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192436788] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:44:16,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328032324] [2021-12-22 13:44:16,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:44:16,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:44:16,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:44:16,777 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:44:16,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 13:44:16,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:44:16,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:44:16,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-22 13:44:16,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:44:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:44:20,111 INFO L328 TraceCheckSpWp]: Computing backward predicates...