./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel/misc-4.wvr.c --full-output -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-NewStatesSleepPersistentFixedOrder-NoLbe-Lockstep.epf --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c2bbc92 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/parallel/misc-4.wvr.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 1f1369e2bde83a34ff738947d42bd6409176c4c8 -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-NewStatesSleepPersistentFixedOrder-NoLbe-Lockstep.epf ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-05 22:35:14,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-05 22:35:14,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-05 22:35:14,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-05 22:35:14,444 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-05 22:35:14,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-05 22:35:14,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-05 22:35:14,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-05 22:35:14,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-05 22:35:14,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-05 22:35:14,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-05 22:35:14,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-05 22:35:14,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-05 22:35:14,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-05 22:35:14,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-05 22:35:14,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-05 22:35:14,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-05 22:35:14,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-05 22:35:14,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-05 22:35:14,503 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-05 22:35:14,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-05 22:35:14,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-05 22:35:14,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-05 22:35:14,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-05 22:35:14,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-05 22:35:14,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-05 22:35:14,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-05 22:35:14,518 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-05 22:35:14,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-05 22:35:14,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-05 22:35:14,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-05 22:35:14,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-05 22:35:14,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-05 22:35:14,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-05 22:35:14,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-05 22:35:14,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-05 22:35:14,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-05 22:35:14,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-05 22:35:14,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-05 22:35:14,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-05 22:35:14,528 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-05 22:35:14,529 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-05 22:35:14,556 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-05 22:35:14,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-05 22:35:14,557 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-05 22:35:14,558 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-05 22:35:14,559 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-05 22:35:14,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-05 22:35:14,560 INFO L138 SettingsManager]: * Use SBE=true [2021-10-05 22:35:14,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-05 22:35:14,560 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-05 22:35:14,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-05 22:35:14,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-05 22:35:14,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-05 22:35:14,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-05 22:35:14,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-05 22:35:14,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-05 22:35:14,562 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-05 22:35:14,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-05 22:35:14,563 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-05 22:35:14,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-05 22:35:14,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-05 22:35:14,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-05 22:35:14,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-05 22:35:14,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 22:35:14,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-05 22:35:14,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-05 22:35:14,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-05 22:35:14,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-05 22:35:14,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-05 22:35:14,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-05 22:35:14,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-05 22:35:14,566 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f1369e2bde83a34ff738947d42bd6409176c4c8 [2021-10-05 22:35:14,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-05 22:35:15,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-05 22:35:15,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-05 22:35:15,029 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-05 22:35:15,030 INFO L275 PluginConnector]: CDTParser initialized [2021-10-05 22:35:15,030 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel/misc-4.wvr.c [2021-10-05 22:35:15,116 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ee53f49f/ac2bc61f988d4460aa52f1f2d6f68c79/FLAG9f6ffb8ad [2021-10-05 22:35:15,782 INFO L306 CDTParser]: Found 1 translation units. [2021-10-05 22:35:15,783 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel/misc-4.wvr.c [2021-10-05 22:35:15,796 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ee53f49f/ac2bc61f988d4460aa52f1f2d6f68c79/FLAG9f6ffb8ad [2021-10-05 22:35:16,134 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ee53f49f/ac2bc61f988d4460aa52f1f2d6f68c79 [2021-10-05 22:35:16,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-05 22:35:16,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-05 22:35:16,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-05 22:35:16,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-05 22:35:16,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-05 22:35:16,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 10:35:16" (1/1) ... [2021-10-05 22:35:16,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1253eaed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:16, skipping insertion in model container [2021-10-05 22:35:16,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 10:35:16" (1/1) ... [2021-10-05 22:35:16,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-05 22:35:16,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-05 22:35:16,364 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel/misc-4.wvr.c[2400,2413] [2021-10-05 22:35:16,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 22:35:16,378 INFO L203 MainTranslator]: Completed pre-run [2021-10-05 22:35:16,402 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel/misc-4.wvr.c[2400,2413] [2021-10-05 22:35:16,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 22:35:16,420 INFO L208 MainTranslator]: Completed translation [2021-10-05 22:35:16,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:16 WrapperNode [2021-10-05 22:35:16,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-05 22:35:16,422 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-05 22:35:16,422 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-05 22:35:16,422 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-05 22:35:16,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:16" (1/1) ... [2021-10-05 22:35:16,439 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:16" (1/1) ... [2021-10-05 22:35:16,461 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-05 22:35:16,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-05 22:35:16,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-05 22:35:16,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-05 22:35:16,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:16" (1/1) ... [2021-10-05 22:35:16,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:16" (1/1) ... [2021-10-05 22:35:16,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:16" (1/1) ... [2021-10-05 22:35:16,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:16" (1/1) ... [2021-10-05 22:35:16,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:16" (1/1) ... [2021-10-05 22:35:16,487 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:16" (1/1) ... [2021-10-05 22:35:16,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:16" (1/1) ... [2021-10-05 22:35:16,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-05 22:35:16,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-05 22:35:16,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-05 22:35:16,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-05 22:35:16,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:16" (1/1) ... [2021-10-05 22:35:16,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 22:35:16,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:35:16,534 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-05 22:35:16,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-05 22:35:16,607 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-05 22:35:16,607 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-05 22:35:16,608 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-05 22:35:16,608 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-05 22:35:16,608 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-05 22:35:16,608 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-05 22:35:16,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-05 22:35:16,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-05 22:35:16,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-05 22:35:16,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-05 22:35:16,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-05 22:35:16,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-05 22:35:16,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-05 22:35:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-05 22:35:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-05 22:35:16,612 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-05 22:35:17,033 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-05 22:35:17,034 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-05 22:35:17,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 10:35:17 BoogieIcfgContainer [2021-10-05 22:35:17,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-05 22:35:17,038 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-05 22:35:17,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-05 22:35:17,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-05 22:35:17,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 10:35:16" (1/3) ... [2021-10-05 22:35:17,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217a4b3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 10:35:17, skipping insertion in model container [2021-10-05 22:35:17,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:35:16" (2/3) ... [2021-10-05 22:35:17,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217a4b3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 10:35:17, skipping insertion in model container [2021-10-05 22:35:17,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 10:35:17" (3/3) ... [2021-10-05 22:35:17,056 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-4.wvr.c [2021-10-05 22:35:17,072 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-05 22:35:17,073 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-05 22:35:17,076 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-05 22:35:17,076 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-05 22:35:17,185 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,186 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,187 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,187 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,188 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,188 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,189 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,189 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,191 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,191 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,192 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,192 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,193 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,194 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,194 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,195 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,199 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,200 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,204 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,205 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,205 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,205 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,208 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,209 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 22:35:17,222 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-05 22:35:17,321 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-05 22:35:17,352 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-10-05 22:35:17,353 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-05 22:35:17,383 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-05 22:35:17,397 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 92 transitions, 208 flow [2021-10-05 22:35:17,402 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 92 transitions, 208 flow [2021-10-05 22:35:17,404 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 95 places, 92 transitions, 208 flow [2021-10-05 22:35:17,514 INFO L129 PetriNetUnfolder]: 7/89 cut-off events. [2021-10-05 22:35:17,514 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-05 22:35:17,524 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 89 events. 7/89 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2021-10-05 22:35:17,529 INFO L116 LiptonReduction]: Number of co-enabled transitions 914 [2021-10-05 22:35:21,546 INFO L131 LiptonReduction]: Checked pairs total: 2112 [2021-10-05 22:35:21,547 INFO L133 LiptonReduction]: Total number of compositions: 75 [2021-10-05 22:35:21,559 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 28 transitions, 80 flow [2021-10-05 22:35:21,583 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 128 states, 127 states have (on average 3.2125984251968505) internal successors, (408), 127 states have internal predecessors, (408), 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) [2021-10-05 22:35:21,587 INFO L276 IsEmpty]: Start isEmpty. Operand has 128 states, 127 states have (on average 3.2125984251968505) internal successors, (408), 127 states have internal predecessors, (408), 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) [2021-10-05 22:35:21,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 22:35:21,598 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:21,599 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:21,600 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 22:35:21,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:21,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1815278862, now seen corresponding path program 1 times [2021-10-05 22:35:21,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:21,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192398770] [2021-10-05 22:35:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:21,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:21,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:21,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:21,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192398770] [2021-10-05 22:35:21,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192398770] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:35:21,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:35:21,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-05 22:35:21,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980837595] [2021-10-05 22:35:21,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-05 22:35:21,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:22,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-05 22:35:22,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 22:35:22,009 INFO L87 Difference]: Start difference. First operand has 128 states, 127 states have (on average 3.2125984251968505) internal successors, (408), 127 states have internal predecessors, (408), 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) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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) [2021-10-05 22:35:22,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:22,054 INFO L93 Difference]: Finished difference Result 124 states and 368 transitions. [2021-10-05 22:35:22,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-05 22:35:22,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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) Word has length 16 [2021-10-05 22:35:22,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:22,069 INFO L225 Difference]: With dead ends: 124 [2021-10-05 22:35:22,070 INFO L226 Difference]: Without dead ends: 88 [2021-10-05 22:35:22,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 22:35:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-05 22:35:22,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-10-05 22:35:22,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.7471264367816093) internal successors, (239), 87 states have internal predecessors, (239), 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) [2021-10-05 22:35:22,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 239 transitions. [2021-10-05 22:35:22,123 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 239 transitions. Word has length 16 [2021-10-05 22:35:22,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:22,124 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 239 transitions. [2021-10-05 22:35:22,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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) [2021-10-05 22:35:22,125 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 239 transitions. [2021-10-05 22:35:22,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 22:35:22,127 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:22,127 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:22,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-05 22:35:22,128 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 22:35:22,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:22,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2136854276, now seen corresponding path program 2 times [2021-10-05 22:35:22,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:22,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655979130] [2021-10-05 22:35:22,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:22,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:22,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:22,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655979130] [2021-10-05 22:35:22,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655979130] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:35:22,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:35:22,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-05 22:35:22,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277769985] [2021-10-05 22:35:22,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 22:35:22,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:22,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 22:35:22,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-05 22:35:22,267 INFO L87 Difference]: Start difference. First operand 88 states and 239 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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) [2021-10-05 22:35:22,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:22,357 INFO L93 Difference]: Finished difference Result 158 states and 440 transitions. [2021-10-05 22:35:22,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-05 22:35:22,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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) Word has length 16 [2021-10-05 22:35:22,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:22,365 INFO L225 Difference]: With dead ends: 158 [2021-10-05 22:35:22,366 INFO L226 Difference]: Without dead ends: 130 [2021-10-05 22:35:22,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-05 22:35:22,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-05 22:35:22,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-10-05 22:35:22,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.9147286821705425) internal successors, (376), 129 states have internal predecessors, (376), 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) [2021-10-05 22:35:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 376 transitions. [2021-10-05 22:35:22,407 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 376 transitions. Word has length 16 [2021-10-05 22:35:22,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:22,407 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 376 transitions. [2021-10-05 22:35:22,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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) [2021-10-05 22:35:22,408 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 376 transitions. [2021-10-05 22:35:22,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-05 22:35:22,412 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:22,412 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:22,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-05 22:35:22,413 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 22:35:22,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:22,414 INFO L82 PathProgramCache]: Analyzing trace with hash 5314461, now seen corresponding path program 1 times [2021-10-05 22:35:22,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:22,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732340617] [2021-10-05 22:35:22,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:22,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:22,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:22,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:22,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732340617] [2021-10-05 22:35:22,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732340617] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:35:22,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:35:22,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-05 22:35:22,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34834377] [2021-10-05 22:35:22,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-05 22:35:22,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:22,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-05 22:35:22,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 22:35:22,560 INFO L87 Difference]: Start difference. First operand 130 states and 376 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2021-10-05 22:35:22,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:22,573 INFO L93 Difference]: Finished difference Result 156 states and 410 transitions. [2021-10-05 22:35:22,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-05 22:35:22,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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) Word has length 18 [2021-10-05 22:35:22,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:22,576 INFO L225 Difference]: With dead ends: 156 [2021-10-05 22:35:22,576 INFO L226 Difference]: Without dead ends: 156 [2021-10-05 22:35:22,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 22:35:22,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-05 22:35:22,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 128. [2021-10-05 22:35:22,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.8661417322834644) internal successors, (364), 127 states have internal predecessors, (364), 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) [2021-10-05 22:35:22,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 364 transitions. [2021-10-05 22:35:22,589 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 364 transitions. Word has length 18 [2021-10-05 22:35:22,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:22,590 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 364 transitions. [2021-10-05 22:35:22,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2021-10-05 22:35:22,591 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 364 transitions. [2021-10-05 22:35:22,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-05 22:35:22,593 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:22,593 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:22,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-05 22:35:22,593 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 22:35:22,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:22,594 INFO L82 PathProgramCache]: Analyzing trace with hash -701733221, now seen corresponding path program 1 times [2021-10-05 22:35:22,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:22,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601302655] [2021-10-05 22:35:22,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:22,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:22,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:22,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:22,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601302655] [2021-10-05 22:35:22,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601302655] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:35:22,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:35:22,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-05 22:35:22,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887323594] [2021-10-05 22:35:22,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 22:35:22,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:22,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 22:35:22,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-05 22:35:22,696 INFO L87 Difference]: Start difference. First operand 128 states and 364 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-10-05 22:35:22,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:22,785 INFO L93 Difference]: Finished difference Result 210 states and 608 transitions. [2021-10-05 22:35:22,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-05 22:35:22,786 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) Word has length 18 [2021-10-05 22:35:22,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:22,789 INFO L225 Difference]: With dead ends: 210 [2021-10-05 22:35:22,790 INFO L226 Difference]: Without dead ends: 182 [2021-10-05 22:35:22,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-05 22:35:22,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-05 22:35:22,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 156. [2021-10-05 22:35:22,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.967741935483871) internal successors, (460), 155 states have internal predecessors, (460), 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) [2021-10-05 22:35:22,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 460 transitions. [2021-10-05 22:35:22,832 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 460 transitions. Word has length 18 [2021-10-05 22:35:22,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:22,833 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 460 transitions. [2021-10-05 22:35:22,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-10-05 22:35:22,834 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 460 transitions. [2021-10-05 22:35:22,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-05 22:35:22,838 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:22,839 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:22,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-05 22:35:22,839 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 22:35:22,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:22,840 INFO L82 PathProgramCache]: Analyzing trace with hash 748023641, now seen corresponding path program 1 times [2021-10-05 22:35:22,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:22,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253962599] [2021-10-05 22:35:22,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:22,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:22,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:22,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253962599] [2021-10-05 22:35:22,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253962599] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:35:22,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:35:22,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-05 22:35:22,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580967797] [2021-10-05 22:35:22,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-05 22:35:22,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:22,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-05 22:35:22,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 22:35:22,908 INFO L87 Difference]: Start difference. First operand 156 states and 460 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2021-10-05 22:35:22,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:22,919 INFO L93 Difference]: Finished difference Result 208 states and 589 transitions. [2021-10-05 22:35:22,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-05 22:35:22,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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) Word has length 18 [2021-10-05 22:35:22,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:22,922 INFO L225 Difference]: With dead ends: 208 [2021-10-05 22:35:22,923 INFO L226 Difference]: Without dead ends: 208 [2021-10-05 22:35:22,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 22:35:22,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-10-05 22:35:22,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 184. [2021-10-05 22:35:22,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 3.010928961748634) internal successors, (551), 183 states have internal predecessors, (551), 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) [2021-10-05 22:35:22,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 551 transitions. [2021-10-05 22:35:22,935 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 551 transitions. Word has length 18 [2021-10-05 22:35:22,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:22,937 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 551 transitions. [2021-10-05 22:35:22,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2021-10-05 22:35:22,938 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 551 transitions. [2021-10-05 22:35:22,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-05 22:35:22,941 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:22,941 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:22,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-05 22:35:22,942 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 22:35:22,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:22,943 INFO L82 PathProgramCache]: Analyzing trace with hash 2097330078, now seen corresponding path program 1 times [2021-10-05 22:35:22,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:22,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531202579] [2021-10-05 22:35:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:22,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:23,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:23,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:23,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531202579] [2021-10-05 22:35:23,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531202579] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:23,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884256015] [2021-10-05 22:35:23,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:23,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:23,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:35:23,094 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:35:23,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-05 22:35:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:23,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-05 22:35:23,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:35:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:23,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884256015] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:23,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:35:23,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-05 22:35:23,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772930938] [2021-10-05 22:35:23,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 22:35:23,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:23,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 22:35:23,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-05 22:35:23,328 INFO L87 Difference]: Start difference. First operand 184 states and 551 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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) [2021-10-05 22:35:23,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:23,439 INFO L93 Difference]: Finished difference Result 352 states and 1063 transitions. [2021-10-05 22:35:23,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-05 22:35:23,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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) Word has length 20 [2021-10-05 22:35:23,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:23,443 INFO L225 Difference]: With dead ends: 352 [2021-10-05 22:35:23,443 INFO L226 Difference]: Without dead ends: 306 [2021-10-05 22:35:23,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-05 22:35:23,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-10-05 22:35:23,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 220. [2021-10-05 22:35:23,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 3.0730593607305936) internal successors, (673), 219 states have internal predecessors, (673), 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) [2021-10-05 22:35:23,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 673 transitions. [2021-10-05 22:35:23,456 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 673 transitions. Word has length 20 [2021-10-05 22:35:23,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:23,457 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 673 transitions. [2021-10-05 22:35:23,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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) [2021-10-05 22:35:23,458 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 673 transitions. [2021-10-05 22:35:23,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-05 22:35:23,459 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:23,459 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:23,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-05 22:35:23,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:23,673 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 22:35:23,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:23,675 INFO L82 PathProgramCache]: Analyzing trace with hash 739242062, now seen corresponding path program 1 times [2021-10-05 22:35:23,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:23,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517473260] [2021-10-05 22:35:23,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:23,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:23,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:23,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517473260] [2021-10-05 22:35:23,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517473260] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:23,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531591041] [2021-10-05 22:35:23,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:23,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:23,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:35:23,775 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:35:23,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-05 22:35:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:23,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-05 22:35:23,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:35:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:23,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531591041] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:23,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:35:23,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-05 22:35:23,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537019989] [2021-10-05 22:35:23,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 22:35:23,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:23,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 22:35:23,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-05 22:35:23,999 INFO L87 Difference]: Start difference. First operand 220 states and 673 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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) [2021-10-05 22:35:24,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:24,107 INFO L93 Difference]: Finished difference Result 490 states and 1540 transitions. [2021-10-05 22:35:24,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-05 22:35:24,108 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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) Word has length 20 [2021-10-05 22:35:24,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:24,113 INFO L225 Difference]: With dead ends: 490 [2021-10-05 22:35:24,113 INFO L226 Difference]: Without dead ends: 444 [2021-10-05 22:35:24,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-05 22:35:24,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-10-05 22:35:24,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 410. [2021-10-05 22:35:24,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 3.2102689486552567) internal successors, (1313), 409 states have internal predecessors, (1313), 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) [2021-10-05 22:35:24,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1313 transitions. [2021-10-05 22:35:24,133 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1313 transitions. Word has length 20 [2021-10-05 22:35:24,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:24,133 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1313 transitions. [2021-10-05 22:35:24,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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) [2021-10-05 22:35:24,134 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1313 transitions. [2021-10-05 22:35:24,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-05 22:35:24,136 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:24,136 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:24,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-05 22:35:24,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-05 22:35:24,350 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 22:35:24,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:24,351 INFO L82 PathProgramCache]: Analyzing trace with hash -947334175, now seen corresponding path program 2 times [2021-10-05 22:35:24,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:24,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874302903] [2021-10-05 22:35:24,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:24,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:24,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 22:35:24,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:24,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874302903] [2021-10-05 22:35:24,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874302903] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:35:24,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:35:24,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-05 22:35:24,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939162323] [2021-10-05 22:35:24,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 22:35:24,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:24,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 22:35:24,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-05 22:35:24,412 INFO L87 Difference]: Start difference. First operand 410 states and 1313 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-10-05 22:35:24,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:24,443 INFO L93 Difference]: Finished difference Result 598 states and 1772 transitions. [2021-10-05 22:35:24,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 22:35:24,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) Word has length 22 [2021-10-05 22:35:24,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:24,449 INFO L225 Difference]: With dead ends: 598 [2021-10-05 22:35:24,449 INFO L226 Difference]: Without dead ends: 598 [2021-10-05 22:35:24,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-05 22:35:24,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-10-05 22:35:24,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 522. [2021-10-05 22:35:24,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.1190019193857967) internal successors, (1625), 521 states have internal predecessors, (1625), 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) [2021-10-05 22:35:24,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1625 transitions. [2021-10-05 22:35:24,481 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1625 transitions. Word has length 22 [2021-10-05 22:35:24,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:24,482 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 1625 transitions. [2021-10-05 22:35:24,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-10-05 22:35:24,482 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1625 transitions. [2021-10-05 22:35:24,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-05 22:35:24,484 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:24,485 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 22:35:24,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-05 22:35:24,485 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 22:35:24,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:24,486 INFO L82 PathProgramCache]: Analyzing trace with hash 467593509, now seen corresponding path program 2 times [2021-10-05 22:35:24,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:24,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244728192] [2021-10-05 22:35:24,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:24,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 22:35:24,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:24,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244728192] [2021-10-05 22:35:24,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244728192] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 22:35:24,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 22:35:24,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-05 22:35:24,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905492148] [2021-10-05 22:35:24,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 22:35:24,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:24,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 22:35:24,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-05 22:35:24,550 INFO L87 Difference]: Start difference. First operand 522 states and 1625 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-10-05 22:35:24,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:24,575 INFO L93 Difference]: Finished difference Result 502 states and 1428 transitions. [2021-10-05 22:35:24,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 22:35:24,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) Word has length 22 [2021-10-05 22:35:24,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:24,581 INFO L225 Difference]: With dead ends: 502 [2021-10-05 22:35:24,581 INFO L226 Difference]: Without dead ends: 502 [2021-10-05 22:35:24,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-05 22:35:24,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-10-05 22:35:24,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 478. [2021-10-05 22:35:24,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.9140461215932913) internal successors, (1390), 477 states have internal predecessors, (1390), 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) [2021-10-05 22:35:24,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1390 transitions. [2021-10-05 22:35:24,602 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1390 transitions. Word has length 22 [2021-10-05 22:35:24,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:24,602 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1390 transitions. [2021-10-05 22:35:24,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-10-05 22:35:24,602 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1390 transitions. [2021-10-05 22:35:24,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-05 22:35:24,604 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:24,605 INFO L512 BasicCegarLoop]: 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] [2021-10-05 22:35:24,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-05 22:35:24,605 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 22:35:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:24,606 INFO L82 PathProgramCache]: Analyzing trace with hash -310444334, now seen corresponding path program 1 times [2021-10-05 22:35:24,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:24,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579689944] [2021-10-05 22:35:24,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:24,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:24,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:24,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579689944] [2021-10-05 22:35:24,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579689944] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:24,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495043113] [2021-10-05 22:35:24,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:24,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:24,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:35:24,720 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:35:24,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-05 22:35:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:24,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-05 22:35:24,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:35:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:24,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495043113] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:24,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:35:24,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-10-05 22:35:24,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448230715] [2021-10-05 22:35:24,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-05 22:35:24,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:24,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-05 22:35:24,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-05 22:35:24,919 INFO L87 Difference]: Start difference. First operand 478 states and 1390 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 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) [2021-10-05 22:35:25,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:25,049 INFO L93 Difference]: Finished difference Result 816 states and 2351 transitions. [2021-10-05 22:35:25,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-05 22:35:25,050 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 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) Word has length 24 [2021-10-05 22:35:25,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:25,056 INFO L225 Difference]: With dead ends: 816 [2021-10-05 22:35:25,057 INFO L226 Difference]: Without dead ends: 766 [2021-10-05 22:35:25,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-05 22:35:25,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-10-05 22:35:25,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 368. [2021-10-05 22:35:25,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.9019073569482288) internal successors, (1065), 367 states have internal predecessors, (1065), 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) [2021-10-05 22:35:25,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1065 transitions. [2021-10-05 22:35:25,078 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1065 transitions. Word has length 24 [2021-10-05 22:35:25,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:25,079 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1065 transitions. [2021-10-05 22:35:25,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 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) [2021-10-05 22:35:25,079 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1065 transitions. [2021-10-05 22:35:25,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-05 22:35:25,081 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 22:35:25,081 INFO L512 BasicCegarLoop]: 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] [2021-10-05 22:35:25,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-05 22:35:25,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:25,296 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 22:35:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 22:35:25,297 INFO L82 PathProgramCache]: Analyzing trace with hash 109367566, now seen corresponding path program 2 times [2021-10-05 22:35:25,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 22:35:25,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684249344] [2021-10-05 22:35:25,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 22:35:25,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 22:35:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 22:35:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:25,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 22:35:25,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684249344] [2021-10-05 22:35:25,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684249344] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:25,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357903611] [2021-10-05 22:35:25,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 22:35:25,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 22:35:25,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 22:35:25,409 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 22:35:25,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-05 22:35:25,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 22:35:25,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 22:35:25,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-05 22:35:25,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 22:35:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 22:35:25,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357903611] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 22:35:25,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 22:35:25,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-05 22:35:25,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167230746] [2021-10-05 22:35:25,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-05 22:35:25,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 22:35:25,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-05 22:35:25,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-05 22:35:25,635 INFO L87 Difference]: Start difference. First operand 368 states and 1065 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 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) [2021-10-05 22:35:25,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 22:35:25,859 INFO L93 Difference]: Finished difference Result 662 states and 1905 transitions. [2021-10-05 22:35:25,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-05 22:35:25,860 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 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) Word has length 24 [2021-10-05 22:35:25,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 22:35:25,860 INFO L225 Difference]: With dead ends: 662 [2021-10-05 22:35:25,860 INFO L226 Difference]: Without dead ends: 0 [2021-10-05 22:35:25,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-10-05 22:35:25,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-05 22:35:25,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-05 22:35:25,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-10-05 22:35:25,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-05 22:35:25,862 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-10-05 22:35:25,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 22:35:25,862 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-05 22:35:25,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 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) [2021-10-05 22:35:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-05 22:35:25,862 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-05 22:35:25,865 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-05 22:35:25,866 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-05 22:35:25,866 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-05 22:35:25,866 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-05 22:35:25,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-05 22:35:26,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-05 22:35:26,081 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-05 22:35:26,081 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-05 22:35:26,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 10:35:26 BasicIcfg [2021-10-05 22:35:26,083 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-05 22:35:26,084 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-05 22:35:26,084 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-05 22:35:26,085 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-05 22:35:26,085 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 10:35:17" (3/4) ... [2021-10-05 22:35:26,088 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-05 22:35:26,095 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-05 22:35:26,095 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-05 22:35:26,095 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-10-05 22:35:26,100 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-10-05 22:35:26,100 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-05 22:35:26,101 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-05 22:35:26,101 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-05 22:35:26,151 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-05 22:35:26,151 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-05 22:35:26,153 INFO L168 Benchmark]: Toolchain (without parser) took 10013.45 ms. Allocated memory was 48.2 MB in the beginning and 86.0 MB in the end (delta: 37.7 MB). Free memory was 25.0 MB in the beginning and 42.0 MB in the end (delta: -17.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-05 22:35:26,153 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 37.7 MB. Free memory is still 17.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-05 22:35:26,154 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.16 ms. Allocated memory is still 48.2 MB. Free memory was 24.7 MB in the beginning and 25.7 MB in the end (delta: -1.0 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2021-10-05 22:35:26,154 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.94 ms. Allocated memory is still 48.2 MB. Free memory was 25.7 MB in the beginning and 24.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 22:35:26,155 INFO L168 Benchmark]: Boogie Preprocessor took 30.79 ms. Allocated memory is still 48.2 MB. Free memory was 24.1 MB in the beginning and 22.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 22:35:26,155 INFO L168 Benchmark]: RCFGBuilder took 542.60 ms. Allocated memory is still 48.2 MB. Free memory was 22.8 MB in the beginning and 21.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. [2021-10-05 22:35:26,156 INFO L168 Benchmark]: TraceAbstraction took 9045.15 ms. Allocated memory was 48.2 MB in the beginning and 86.0 MB in the end (delta: 37.7 MB). Free memory was 21.3 MB in the beginning and 44.8 MB in the end (delta: -23.5 MB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. [2021-10-05 22:35:26,159 INFO L168 Benchmark]: Witness Printer took 67.19 ms. Allocated memory is still 86.0 MB. Free memory was 44.8 MB in the beginning and 42.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 22:35:26,162 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 37.7 MB. Free memory is still 17.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 275.16 ms. Allocated memory is still 48.2 MB. Free memory was 24.7 MB in the beginning and 25.7 MB in the end (delta: -1.0 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.94 ms. Allocated memory is still 48.2 MB. Free memory was 25.7 MB in the beginning and 24.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.79 ms. Allocated memory is still 48.2 MB. Free memory was 24.1 MB in the beginning and 22.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 542.60 ms. Allocated memory is still 48.2 MB. Free memory was 22.8 MB in the beginning and 21.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9045.15 ms. Allocated memory was 48.2 MB in the beginning and 86.0 MB in the end (delta: 37.7 MB). Free memory was 21.3 MB in the beginning and 44.8 MB in the end (delta: -23.5 MB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. * Witness Printer took 67.19 ms. Allocated memory is still 86.0 MB. Free memory was 44.8 MB in the beginning and 42.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4145.4ms, 95 PlacesBefore, 34 PlacesAfterwards, 92 TransitionsBefore, 28 TransitionsAfterwards, 914 CoEnabledTransitionPairs, 6 FixpointIterations, 40 TrivialSequentialCompositions, 20 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 8 ConcurrentYvCompositions, 3 ChoiceCompositions, 75 TotalNumberOfCompositions, 2112 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1752, positive: 1676, positive conditional: 0, positive unconditional: 1676, negative: 76, negative conditional: 0, negative unconditional: 76, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 748, positive: 718, positive conditional: 0, positive unconditional: 718, negative: 30, negative conditional: 0, negative unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 748, positive: 702, positive conditional: 0, positive unconditional: 702, negative: 46, negative conditional: 0, negative unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 46, positive: 16, positive conditional: 0, positive unconditional: 16, negative: 30, negative conditional: 0, negative unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 119, positive: 48, positive conditional: 0, positive unconditional: 48, negative: 71, negative conditional: 0, negative unconditional: 71, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1752, positive: 958, positive conditional: 0, positive unconditional: 958, negative: 46, negative conditional: 0, negative unconditional: 46, unknown: 748, unknown conditional: 0, unknown unconditional: 748] , Statistics on independence cache: Total cache size (in pairs): 115, Positive cache size: 104, Positive conditional cache size: 0, Positive unconditional cache size: 104, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 100]: 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 7 procedures, 109 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 8762.2ms, OverallIterations: 11, TraceHistogramMax: 2, EmptinessCheckTime: 39.2ms, AutomataDifference: 985.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 4230.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 353 SDtfs, 332 SDslu, 610 SDs, 0 SdLazy, 533 SolverSat, 107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 517.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 150 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 259.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=522occurred in iteration=8, InterpolantAutomatonStates: 65, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 242.4ms AutomataMinimizationTime, 11 MinimizatonAttempts, 696 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 71.0ms SsaConstructionTime, 523.7ms SatisfiabilityAnalysisTime, 1276.8ms InterpolantComputationTime, 306 NumberOfCodeBlocks, 306 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 291 ConstructedInterpolants, 0 QuantifiedInterpolants, 1331 SizeOfPredicates, 28 NumberOfNonLiveVariables, 554 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 15 InterpolantComputations, 7 PerfectInterpolantSequences, 27/53 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! [2021-10-05 22:35:26,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...