./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-lit/qw2004-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-lit/qw2004-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3fb83c29fe591f537beeb8acce355ea986d79a29cfcecdcee0a9fb1725d601d1 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 22:23:15,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 22:23:15,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 22:23:15,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 22:23:15,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 22:23:15,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 22:23:15,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 22:23:15,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 22:23:15,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 22:23:15,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 22:23:15,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 22:23:15,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 22:23:15,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 22:23:15,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 22:23:15,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 22:23:15,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 22:23:15,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 22:23:15,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 22:23:15,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 22:23:15,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 22:23:15,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 22:23:15,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 22:23:15,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 22:23:15,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 22:23:15,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 22:23:15,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 22:23:15,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 22:23:15,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 22:23:15,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 22:23:15,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 22:23:15,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 22:23:15,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 22:23:15,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 22:23:15,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 22:23:15,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 22:23:15,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 22:23:15,467 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 22:23:15,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 22:23:15,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 22:23:15,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 22:23:15,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 22:23:15,473 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 22:23:15,500 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 22:23:15,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 22:23:15,502 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 22:23:15,502 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 22:23:15,503 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 22:23:15,503 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 22:23:15,504 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 22:23:15,504 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 22:23:15,504 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 22:23:15,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 22:23:15,505 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 22:23:15,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 22:23:15,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 22:23:15,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 22:23:15,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 22:23:15,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 22:23:15,506 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 22:23:15,506 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 22:23:15,506 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 22:23:15,506 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 22:23:15,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 22:23:15,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 22:23:15,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 22:23:15,507 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 22:23:15,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:23:15,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 22:23:15,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 22:23:15,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 22:23:15,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 22:23:15,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 22:23:15,508 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 22:23:15,508 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 22:23:15,508 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 22:23:15,508 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 22:23:15,508 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3fb83c29fe591f537beeb8acce355ea986d79a29cfcecdcee0a9fb1725d601d1 [2021-12-17 22:23:15,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 22:23:15,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 22:23:15,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 22:23:15,725 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 22:23:15,725 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 22:23:15,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-lit/qw2004-1.i [2021-12-17 22:23:15,769 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f25f3f97c/3f4e543044144833849a1989115f72f2/FLAG109e2fb68 [2021-12-17 22:23:16,197 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 22:23:16,198 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/qw2004-1.i [2021-12-17 22:23:16,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f25f3f97c/3f4e543044144833849a1989115f72f2/FLAG109e2fb68 [2021-12-17 22:23:16,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f25f3f97c/3f4e543044144833849a1989115f72f2 [2021-12-17 22:23:16,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 22:23:16,223 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 22:23:16,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 22:23:16,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 22:23:16,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 22:23:16,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:23:16" (1/1) ... [2021-12-17 22:23:16,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50037ae1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:23:16, skipping insertion in model container [2021-12-17 22:23:16,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:23:16" (1/1) ... [2021-12-17 22:23:16,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 22:23:16,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 22:23:16,558 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/qw2004-1.i[30003,30016] [2021-12-17 22:23:16,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:23:16,582 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 22:23:16,614 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-lit/qw2004-1.i[30003,30016] [2021-12-17 22:23:16,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:23:16,650 INFO L208 MainTranslator]: Completed translation [2021-12-17 22:23:16,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:23:16 WrapperNode [2021-12-17 22:23:16,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 22:23:16,652 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 22:23:16,652 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 22:23:16,652 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 22:23:16,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:23:16" (1/1) ... [2021-12-17 22:23:16,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:23:16" (1/1) ... [2021-12-17 22:23:16,703 INFO L137 Inliner]: procedures = 175, calls = 23, calls flagged for inlining = 9, calls inlined = 10, statements flattened = 98 [2021-12-17 22:23:16,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 22:23:16,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 22:23:16,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 22:23:16,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 22:23:16,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:23:16" (1/1) ... [2021-12-17 22:23:16,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:23:16" (1/1) ... [2021-12-17 22:23:16,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:23:16" (1/1) ... [2021-12-17 22:23:16,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:23:16" (1/1) ... [2021-12-17 22:23:16,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:23:16" (1/1) ... [2021-12-17 22:23:16,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:23:16" (1/1) ... [2021-12-17 22:23:16,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:23:16" (1/1) ... [2021-12-17 22:23:16,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 22:23:16,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 22:23:16,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 22:23:16,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 22:23:16,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:23:16" (1/1) ... [2021-12-17 22:23:16,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:23:16,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:23:16,760 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) [2021-12-17 22:23:16,762 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 [2021-12-17 22:23:16,790 INFO L130 BoogieDeclarations]: Found specification of procedure BCSP_PnpStop [2021-12-17 22:23:16,790 INFO L138 BoogieDeclarations]: Found implementation of procedure BCSP_PnpStop [2021-12-17 22:23:16,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 22:23:16,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-17 22:23:16,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 22:23:16,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 22:23:16,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 22:23:16,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 22:23:16,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-17 22:23:16,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 22:23:16,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 22:23:16,793 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-17 22:23:16,885 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 22:23:16,886 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 22:23:17,076 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 22:23:17,094 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 22:23:17,095 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-17 22:23:17,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:23:17 BoogieIcfgContainer [2021-12-17 22:23:17,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 22:23:17,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 22:23:17,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 22:23:17,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 22:23:17,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 10:23:16" (1/3) ... [2021-12-17 22:23:17,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b9aaaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:23:17, skipping insertion in model container [2021-12-17 22:23:17,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:23:16" (2/3) ... [2021-12-17 22:23:17,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b9aaaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:23:17, skipping insertion in model container [2021-12-17 22:23:17,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:23:17" (3/3) ... [2021-12-17 22:23:17,102 INFO L111 eAbstractionObserver]: Analyzing ICFG qw2004-1.i [2021-12-17 22:23:17,105 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-17 22:23:17,105 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 22:23:17,106 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 22:23:17,106 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-17 22:23:17,124 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,124 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,125 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,125 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,125 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#in~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,125 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#in~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,125 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,125 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,126 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,126 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,126 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,126 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,126 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,126 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,127 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,127 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,127 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_~tmp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,127 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,127 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_~tmp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,127 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,127 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_~tmp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,128 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,128 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_~tmp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,128 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,128 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_~tmp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,128 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,128 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_~tmp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,129 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,129 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,129 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,129 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,129 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,129 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,129 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,130 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,130 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,130 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,130 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,130 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,130 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,131 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,131 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,131 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,131 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,131 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,131 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,132 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,132 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,132 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,132 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,132 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,132 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,133 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,133 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,133 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,133 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,133 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,133 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,134 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,134 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,136 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_~arg#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,136 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,136 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,136 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,137 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_#t~ret4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,137 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_~arg#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,137 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_~tmp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,137 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,137 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_BCSP_IoDecrement_~pending~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,137 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,138 WARN L322 ript$VariableManager]: TermVariabe |BCSP_PnpStopThread1of1ForFork0_dec_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:23:17,138 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-12-17 22:23:17,178 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 22:23:17,184 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 [2021-12-17 22:23:17,184 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 22:23:17,197 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 112 places, 114 transitions, 233 flow [2021-12-17 22:23:17,251 INFO L129 PetriNetUnfolder]: 6/113 cut-off events. [2021-12-17 22:23:17,251 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-17 22:23:17,255 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 113 events. 6/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 112 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2021-12-17 22:23:17,255 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 114 transitions, 233 flow [2021-12-17 22:23:17,259 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 113 transitions, 229 flow [2021-12-17 22:23:17,279 INFO L129 PetriNetUnfolder]: 5/89 cut-off events. [2021-12-17 22:23:17,280 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-17 22:23:17,281 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:23:17,283 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] [2021-12-17 22:23:17,299 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:23:17,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:23:17,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1022990879, now seen corresponding path program 1 times [2021-12-17 22:23:17,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:23:17,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052890726] [2021-12-17 22:23:17,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:23:17,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:23:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:23:17,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:23:17,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:23:17,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052890726] [2021-12-17 22:23:17,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052890726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:23:17,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:23:17,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 22:23:17,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633772395] [2021-12-17 22:23:17,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:23:17,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 22:23:17,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:23:17,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 22:23:17,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 22:23:17,569 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 114 [2021-12-17 22:23:17,573 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 113 transitions, 229 flow. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:17,574 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:23:17,574 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 114 [2021-12-17 22:23:17,575 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:23:17,667 INFO L129 PetriNetUnfolder]: 19/317 cut-off events. [2021-12-17 22:23:17,667 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-12-17 22:23:17,670 INFO L84 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 317 events. 19/317 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1304 event pairs, 2 based on Foata normal form. 11/303 useless extension candidates. Maximal degree in co-relation 313. Up to 14 conditions per place. [2021-12-17 22:23:17,672 INFO L132 encePairwiseOnDemand]: 108/114 looper letters, 8 selfloop transitions, 3 changer transitions 0/113 dead transitions. [2021-12-17 22:23:17,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 113 transitions, 251 flow [2021-12-17 22:23:17,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 22:23:17,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-17 22:23:17,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 325 transitions. [2021-12-17 22:23:17,681 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9502923976608187 [2021-12-17 22:23:17,682 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 325 transitions. [2021-12-17 22:23:17,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 325 transitions. [2021-12-17 22:23:17,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:23:17,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 325 transitions. [2021-12-17 22:23:17,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:17,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:17,698 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:17,699 INFO L186 Difference]: Start difference. First operand has 111 places, 113 transitions, 229 flow. Second operand 3 states and 325 transitions. [2021-12-17 22:23:17,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 113 transitions, 251 flow [2021-12-17 22:23:17,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 113 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-17 22:23:17,705 INFO L242 Difference]: Finished difference. Result has 113 places, 111 transitions, 240 flow [2021-12-17 22:23:17,707 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=113, PETRI_TRANSITIONS=111} [2021-12-17 22:23:17,710 INFO L334 CegarLoopForPetriNet]: 111 programPoint places, 2 predicate places. [2021-12-17 22:23:17,710 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 111 transitions, 240 flow [2021-12-17 22:23:17,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:17,710 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:23:17,710 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] [2021-12-17 22:23:17,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 22:23:17,711 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:23:17,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:23:17,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1274572337, now seen corresponding path program 1 times [2021-12-17 22:23:17,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:23:17,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865016057] [2021-12-17 22:23:17,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:23:17,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:23:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:23:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:23:17,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:23:17,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865016057] [2021-12-17 22:23:17,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865016057] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:23:17,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:23:17,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 22:23:17,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173901947] [2021-12-17 22:23:17,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:23:17,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 22:23:17,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:23:17,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 22:23:17,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 22:23:17,839 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 114 [2021-12-17 22:23:17,839 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 111 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:17,839 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:23:17,839 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 114 [2021-12-17 22:23:17,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:23:17,990 INFO L129 PetriNetUnfolder]: 49/558 cut-off events. [2021-12-17 22:23:17,990 INFO L130 PetriNetUnfolder]: For 13/15 co-relation queries the response was YES. [2021-12-17 22:23:17,994 INFO L84 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 558 events. 49/558 cut-off events. For 13/15 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3114 event pairs, 3 based on Foata normal form. 0/523 useless extension candidates. Maximal degree in co-relation 641. Up to 24 conditions per place. [2021-12-17 22:23:17,996 INFO L132 encePairwiseOnDemand]: 108/114 looper letters, 19 selfloop transitions, 7 changer transitions 3/127 dead transitions. [2021-12-17 22:23:17,996 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 127 transitions, 334 flow [2021-12-17 22:23:17,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 22:23:17,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-17 22:23:18,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 822 transitions. [2021-12-17 22:23:18,001 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9013157894736842 [2021-12-17 22:23:18,002 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 822 transitions. [2021-12-17 22:23:18,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 822 transitions. [2021-12-17 22:23:18,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:23:18,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 822 transitions. [2021-12-17 22:23:18,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 102.75) internal successors, (822), 8 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:18,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 114.0) internal successors, (1026), 9 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) [2021-12-17 22:23:18,008 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 114.0) internal successors, (1026), 9 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) [2021-12-17 22:23:18,008 INFO L186 Difference]: Start difference. First operand has 113 places, 111 transitions, 240 flow. Second operand 8 states and 822 transitions. [2021-12-17 22:23:18,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 127 transitions, 334 flow [2021-12-17 22:23:18,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 127 transitions, 326 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-17 22:23:18,013 INFO L242 Difference]: Finished difference. Result has 122 places, 116 transitions, 277 flow [2021-12-17 22:23:18,013 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=277, PETRI_PLACES=122, PETRI_TRANSITIONS=116} [2021-12-17 22:23:18,014 INFO L334 CegarLoopForPetriNet]: 111 programPoint places, 11 predicate places. [2021-12-17 22:23:18,014 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 116 transitions, 277 flow [2021-12-17 22:23:18,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:18,015 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:23:18,015 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:23:18,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 22:23:18,015 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:23:18,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:23:18,016 INFO L85 PathProgramCache]: Analyzing trace with hash -2085581213, now seen corresponding path program 1 times [2021-12-17 22:23:18,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:23:18,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782069746] [2021-12-17 22:23:18,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:23:18,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:23:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:23:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:23:18,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:23:18,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782069746] [2021-12-17 22:23:18,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782069746] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:23:18,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:23:18,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 22:23:18,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537662849] [2021-12-17 22:23:18,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:23:18,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 22:23:18,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:23:18,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 22:23:18,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 22:23:18,121 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 114 [2021-12-17 22:23:18,123 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 116 transitions, 277 flow. Second operand has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:18,125 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:23:18,126 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 114 [2021-12-17 22:23:18,126 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:23:18,281 INFO L129 PetriNetUnfolder]: 130/988 cut-off events. [2021-12-17 22:23:18,281 INFO L130 PetriNetUnfolder]: For 35/48 co-relation queries the response was YES. [2021-12-17 22:23:18,283 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1333 conditions, 988 events. 130/988 cut-off events. For 35/48 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 7623 event pairs, 5 based on Foata normal form. 0/925 useless extension candidates. Maximal degree in co-relation 1293. Up to 131 conditions per place. [2021-12-17 22:23:18,284 INFO L132 encePairwiseOnDemand]: 107/114 looper letters, 10 selfloop transitions, 2 changer transitions 56/137 dead transitions. [2021-12-17 22:23:18,284 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 137 transitions, 397 flow [2021-12-17 22:23:18,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 22:23:18,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-17 22:23:18,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 820 transitions. [2021-12-17 22:23:18,288 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8991228070175439 [2021-12-17 22:23:18,288 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 820 transitions. [2021-12-17 22:23:18,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 820 transitions. [2021-12-17 22:23:18,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:23:18,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 820 transitions. [2021-12-17 22:23:18,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 102.5) internal successors, (820), 8 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:18,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 114.0) internal successors, (1026), 9 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) [2021-12-17 22:23:18,292 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 114.0) internal successors, (1026), 9 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) [2021-12-17 22:23:18,292 INFO L186 Difference]: Start difference. First operand has 122 places, 116 transitions, 277 flow. Second operand 8 states and 820 transitions. [2021-12-17 22:23:18,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 137 transitions, 397 flow [2021-12-17 22:23:18,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 137 transitions, 397 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 22:23:18,298 INFO L242 Difference]: Finished difference. Result has 133 places, 80 transitions, 204 flow [2021-12-17 22:23:18,298 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=204, PETRI_PLACES=133, PETRI_TRANSITIONS=80} [2021-12-17 22:23:18,300 INFO L334 CegarLoopForPetriNet]: 111 programPoint places, 22 predicate places. [2021-12-17 22:23:18,300 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 80 transitions, 204 flow [2021-12-17 22:23:18,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 99.8) internal successors, (499), 5 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:18,300 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:23:18,301 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:23:18,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 22:23:18,301 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:23:18,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:23:18,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1537175088, now seen corresponding path program 1 times [2021-12-17 22:23:18,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:23:18,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380481530] [2021-12-17 22:23:18,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:23:18,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:23:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:23:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:23:18,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:23:18,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380481530] [2021-12-17 22:23:18,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380481530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:23:18,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:23:18,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 22:23:18,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585896281] [2021-12-17 22:23:18,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:23:18,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 22:23:18,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:23:18,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 22:23:18,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 22:23:18,415 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 114 [2021-12-17 22:23:18,416 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 80 transitions, 204 flow. Second operand has 8 states, 8 states have (on average 95.875) internal successors, (767), 8 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:18,416 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:23:18,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 114 [2021-12-17 22:23:18,416 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:23:18,500 INFO L129 PetriNetUnfolder]: 11/206 cut-off events. [2021-12-17 22:23:18,501 INFO L130 PetriNetUnfolder]: For 24/34 co-relation queries the response was YES. [2021-12-17 22:23:18,501 INFO L84 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 206 events. 11/206 cut-off events. For 24/34 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 910 event pairs, 7 based on Foata normal form. 1/201 useless extension candidates. Maximal degree in co-relation 305. Up to 25 conditions per place. [2021-12-17 22:23:18,502 INFO L132 encePairwiseOnDemand]: 106/114 looper letters, 13 selfloop transitions, 2 changer transitions 14/92 dead transitions. [2021-12-17 22:23:18,502 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 92 transitions, 288 flow [2021-12-17 22:23:18,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 22:23:18,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-17 22:23:18,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 875 transitions. [2021-12-17 22:23:18,504 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8528265107212476 [2021-12-17 22:23:18,504 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 875 transitions. [2021-12-17 22:23:18,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 875 transitions. [2021-12-17 22:23:18,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:23:18,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 875 transitions. [2021-12-17 22:23:18,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 97.22222222222223) internal successors, (875), 9 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:18,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:18,508 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:18,508 INFO L186 Difference]: Start difference. First operand has 133 places, 80 transitions, 204 flow. Second operand 9 states and 875 transitions. [2021-12-17 22:23:18,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 92 transitions, 288 flow [2021-12-17 22:23:18,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 92 transitions, 264 flow, removed 7 selfloop flow, removed 11 redundant places. [2021-12-17 22:23:18,510 INFO L242 Difference]: Finished difference. Result has 98 places, 78 transitions, 192 flow [2021-12-17 22:23:18,510 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=192, PETRI_PLACES=98, PETRI_TRANSITIONS=78} [2021-12-17 22:23:18,511 INFO L334 CegarLoopForPetriNet]: 111 programPoint places, -13 predicate places. [2021-12-17 22:23:18,511 INFO L470 AbstractCegarLoop]: Abstraction has has 98 places, 78 transitions, 192 flow [2021-12-17 22:23:18,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.875) internal successors, (767), 8 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:18,512 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:23:18,512 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:23:18,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 22:23:18,512 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:23:18,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:23:18,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1734247432, now seen corresponding path program 1 times [2021-12-17 22:23:18,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:23:18,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672431549] [2021-12-17 22:23:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:23:18,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:23:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:23:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:23:18,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:23:18,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672431549] [2021-12-17 22:23:18,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672431549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:23:18,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:23:18,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 22:23:18,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126546925] [2021-12-17 22:23:18,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:23:18,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 22:23:18,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:23:18,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 22:23:18,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 22:23:18,547 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 114 [2021-12-17 22:23:18,548 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 78 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:18,548 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:23:18,548 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 114 [2021-12-17 22:23:18,548 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:23:18,587 INFO L129 PetriNetUnfolder]: 8/103 cut-off events. [2021-12-17 22:23:18,587 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-12-17 22:23:18,587 INFO L84 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 103 events. 8/103 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 218 event pairs, 3 based on Foata normal form. 2/103 useless extension candidates. Maximal degree in co-relation 150. Up to 19 conditions per place. [2021-12-17 22:23:18,588 INFO L132 encePairwiseOnDemand]: 109/114 looper letters, 12 selfloop transitions, 0 changer transitions 9/86 dead transitions. [2021-12-17 22:23:18,588 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 86 transitions, 262 flow [2021-12-17 22:23:18,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 22:23:18,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-17 22:23:18,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 598 transitions. [2021-12-17 22:23:18,589 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8742690058479532 [2021-12-17 22:23:18,589 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 598 transitions. [2021-12-17 22:23:18,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 598 transitions. [2021-12-17 22:23:18,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:23:18,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 598 transitions. [2021-12-17 22:23:18,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 99.66666666666667) internal successors, (598), 6 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:18,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:18,592 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 114.0) internal successors, (798), 7 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:18,592 INFO L186 Difference]: Start difference. First operand has 98 places, 78 transitions, 192 flow. Second operand 6 states and 598 transitions. [2021-12-17 22:23:18,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 86 transitions, 262 flow [2021-12-17 22:23:18,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 86 transitions, 233 flow, removed 6 selfloop flow, removed 9 redundant places. [2021-12-17 22:23:18,594 INFO L242 Difference]: Finished difference. Result has 92 places, 77 transitions, 177 flow [2021-12-17 22:23:18,594 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=177, PETRI_PLACES=92, PETRI_TRANSITIONS=77} [2021-12-17 22:23:18,595 INFO L334 CegarLoopForPetriNet]: 111 programPoint places, -19 predicate places. [2021-12-17 22:23:18,595 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 77 transitions, 177 flow [2021-12-17 22:23:18,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.2) internal successors, (491), 5 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:18,595 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:23:18,596 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:23:18,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 22:23:18,596 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-17 22:23:18,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:23:18,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2127319924, now seen corresponding path program 2 times [2021-12-17 22:23:18,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:23:18,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123158501] [2021-12-17 22:23:18,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:23:18,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:23:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:23:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:23:18,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:23:18,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123158501] [2021-12-17 22:23:18,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123158501] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:23:18,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:23:18,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 22:23:18,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684079430] [2021-12-17 22:23:18,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:23:18,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 22:23:18,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:23:18,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 22:23:18,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 22:23:18,621 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 114 [2021-12-17 22:23:18,622 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 77 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:18,622 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:23:18,622 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 114 [2021-12-17 22:23:18,622 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:23:18,629 INFO L129 PetriNetUnfolder]: 1/83 cut-off events. [2021-12-17 22:23:18,630 INFO L130 PetriNetUnfolder]: For 6/9 co-relation queries the response was YES. [2021-12-17 22:23:18,630 INFO L84 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 83 events. 1/83 cut-off events. For 6/9 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 1 based on Foata normal form. 3/85 useless extension candidates. Maximal degree in co-relation 100. Up to 5 conditions per place. [2021-12-17 22:23:18,630 INFO L132 encePairwiseOnDemand]: 112/114 looper letters, 0 selfloop transitions, 0 changer transitions 63/63 dead transitions. [2021-12-17 22:23:18,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 63 transitions, 148 flow [2021-12-17 22:23:18,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 22:23:18,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-17 22:23:18,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 316 transitions. [2021-12-17 22:23:18,631 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9239766081871345 [2021-12-17 22:23:18,631 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 316 transitions. [2021-12-17 22:23:18,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 316 transitions. [2021-12-17 22:23:18,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:23:18,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 316 transitions. [2021-12-17 22:23:18,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:18,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:18,633 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:18,633 INFO L186 Difference]: Start difference. First operand has 92 places, 77 transitions, 177 flow. Second operand 3 states and 316 transitions. [2021-12-17 22:23:18,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 63 transitions, 148 flow [2021-12-17 22:23:18,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 63 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-17 22:23:18,635 INFO L242 Difference]: Finished difference. Result has 74 places, 0 transitions, 0 flow [2021-12-17 22:23:18,635 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=74, PETRI_TRANSITIONS=0} [2021-12-17 22:23:18,641 INFO L334 CegarLoopForPetriNet]: 111 programPoint places, -37 predicate places. [2021-12-17 22:23:18,641 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 0 transitions, 0 flow [2021-12-17 22:23:18,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:23:18,643 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-17 22:23:18,644 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (0 of 2 remaining) [2021-12-17 22:23:18,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 22:23:18,646 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2021-12-17 22:23:18,648 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-17 22:23:18,648 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 22:23:18,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 10:23:18 BasicIcfg [2021-12-17 22:23:18,651 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 22:23:18,651 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 22:23:18,651 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 22:23:18,651 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 22:23:18,652 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:23:17" (3/4) ... [2021-12-17 22:23:18,653 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-17 22:23:18,657 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure BCSP_PnpStop [2021-12-17 22:23:18,660 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2021-12-17 22:23:18,661 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-17 22:23:18,661 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-17 22:23:18,661 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-17 22:23:18,681 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 22:23:18,681 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 22:23:18,682 INFO L158 Benchmark]: Toolchain (without parser) took 2458.49ms. Allocated memory was 123.7MB in the beginning and 159.4MB in the end (delta: 35.7MB). Free memory was 91.8MB in the beginning and 128.9MB in the end (delta: -37.1MB). Peak memory consumption was 396.0kB. Max. memory is 16.1GB. [2021-12-17 22:23:18,682 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 88.1MB. Free memory was 45.8MB in the beginning and 45.7MB in the end (delta: 39.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 22:23:18,682 INFO L158 Benchmark]: CACSL2BoogieTranslator took 426.89ms. Allocated memory is still 123.7MB. Free memory was 91.6MB in the beginning and 88.6MB in the end (delta: 3.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 22:23:18,682 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.97ms. Allocated memory is still 123.7MB. Free memory was 88.6MB in the beginning and 86.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 22:23:18,683 INFO L158 Benchmark]: Boogie Preprocessor took 28.20ms. Allocated memory is still 123.7MB. Free memory was 86.5MB in the beginning and 85.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 22:23:18,683 INFO L158 Benchmark]: RCFGBuilder took 362.17ms. Allocated memory is still 123.7MB. Free memory was 85.2MB in the beginning and 71.8MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-17 22:23:18,683 INFO L158 Benchmark]: TraceAbstraction took 1553.28ms. Allocated memory was 123.7MB in the beginning and 159.4MB in the end (delta: 35.7MB). Free memory was 71.4MB in the beginning and 132.1MB in the end (delta: -60.7MB). Peak memory consumption was 48.9MB. Max. memory is 16.1GB. [2021-12-17 22:23:18,683 INFO L158 Benchmark]: Witness Printer took 30.34ms. Allocated memory is still 159.4MB. Free memory was 131.0MB in the beginning and 128.9MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-17 22:23:18,685 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 88.1MB. Free memory was 45.8MB in the beginning and 45.7MB in the end (delta: 39.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 426.89ms. Allocated memory is still 123.7MB. Free memory was 91.6MB in the beginning and 88.6MB in the end (delta: 3.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.97ms. Allocated memory is still 123.7MB. Free memory was 88.6MB in the beginning and 86.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.20ms. Allocated memory is still 123.7MB. Free memory was 86.5MB in the beginning and 85.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 362.17ms. Allocated memory is still 123.7MB. Free memory was 85.2MB in the beginning and 71.8MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1553.28ms. Allocated memory was 123.7MB in the beginning and 159.4MB in the end (delta: 35.7MB). Free memory was 71.4MB in the beginning and 132.1MB in the end (delta: -60.7MB). Peak memory consumption was 48.9MB. Max. memory is 16.1GB. * Witness Printer took 30.34ms. Allocated memory is still 159.4MB. Free memory was 131.0MB in the beginning and 128.9MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 690]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 139 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.5s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 69 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 69 mSDsluCounter, 163 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 161 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 198 IncrementalHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 46 mSDtfsCounter, 198 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=277occurred in iteration=2, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 393 NumberOfCodeBlocks, 393 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 387 ConstructedInterpolants, 0 QuantifiedInterpolants, 714 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-17 22:23:18,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE