./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-7.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-7.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a938b9e3b803ef0b08d2618a78ac055be54a6e48f84c6853aab11e3467af8157 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:55:16,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:55:16,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:55:16,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:55:16,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:55:16,411 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:55:16,413 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:55:16,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:55:16,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:55:16,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:55:16,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:55:16,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:55:16,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:55:16,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:55:16,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:55:16,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:55:16,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:55:16,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:55:16,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:55:16,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:55:16,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:55:16,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:55:16,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:55:16,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:55:16,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:55:16,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:55:16,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:55:16,470 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:55:16,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:55:16,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:55:16,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:55:16,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:55:16,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:55:16,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:55:16,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:55:16,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:55:16,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:55:16,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:55:16,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:55:16,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:55:16,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:55:16,486 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:55:16,539 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:55:16,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:55:16,541 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:55:16,541 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:55:16,541 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:55:16,542 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:55:16,542 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:55:16,542 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:55:16,550 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:55:16,550 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:55:16,551 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:55:16,552 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:55:16,552 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:55:16,552 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:55:16,553 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:55:16,553 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:55:16,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:55:16,554 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:55:16,554 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:55:16,555 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:55:16,555 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:55:16,555 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:55:16,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:55:16,556 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:55:16,556 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:55:16,556 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:55:16,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:55:16,557 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:55:16,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:55:16,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:55:16,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:55:16,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:55:16,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:55:16,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:55:16,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:55:16,561 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:55:16,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:55:16,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:55:16,562 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:55:16,562 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:55:16,563 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a938b9e3b803ef0b08d2618a78ac055be54a6e48f84c6853aab11e3467af8157 [2021-11-19 14:55:16,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:55:16,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:55:16,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:55:16,929 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:55:16,930 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:55:16,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/pthread/fib_unsafe-7.i [2021-11-19 14:55:17,041 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/data/97c00c31e/95179fe13f29431b8f0e6d6c2c4d119d/FLAG70c5e667e [2021-11-19 14:55:17,728 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:55:17,736 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/sv-benchmarks/c/pthread/fib_unsafe-7.i [2021-11-19 14:55:17,750 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/data/97c00c31e/95179fe13f29431b8f0e6d6c2c4d119d/FLAG70c5e667e [2021-11-19 14:55:17,952 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/data/97c00c31e/95179fe13f29431b8f0e6d6c2c4d119d [2021-11-19 14:55:17,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:55:17,956 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:55:17,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:55:17,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:55:17,964 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:55:17,965 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:55:17" (1/1) ... [2021-11-19 14:55:17,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e587462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:17, skipping insertion in model container [2021-11-19 14:55:17,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:55:17" (1/1) ... [2021-11-19 14:55:17,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:55:18,031 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:55:18,466 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/sv-benchmarks/c/pthread/fib_unsafe-7.i[30811,30824] [2021-11-19 14:55:18,469 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:55:18,477 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:55:18,523 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/sv-benchmarks/c/pthread/fib_unsafe-7.i[30811,30824] [2021-11-19 14:55:18,528 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:55:18,571 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:55:18,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:18 WrapperNode [2021-11-19 14:55:18,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:55:18,572 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:55:18,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:55:18,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:55:18,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:18" (1/1) ... [2021-11-19 14:55:18,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:18" (1/1) ... [2021-11-19 14:55:18,643 INFO L137 Inliner]: procedures = 164, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2021-11-19 14:55:18,644 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:55:18,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:55:18,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:55:18,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:55:18,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:18" (1/1) ... [2021-11-19 14:55:18,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:18" (1/1) ... [2021-11-19 14:55:18,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:18" (1/1) ... [2021-11-19 14:55:18,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:18" (1/1) ... [2021-11-19 14:55:18,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:18" (1/1) ... [2021-11-19 14:55:18,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:18" (1/1) ... [2021-11-19 14:55:18,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:18" (1/1) ... [2021-11-19 14:55:18,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:55:18,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:55:18,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:55:18,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:55:18,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:18" (1/1) ... [2021-11-19 14:55:18,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:55:18,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:55:18,730 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:55:18,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:55:18,767 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-11-19 14:55:18,767 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-11-19 14:55:18,767 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-11-19 14:55:18,767 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-11-19 14:55:18,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 14:55:18,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-19 14:55:18,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:55:18,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:55:18,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:55:18,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:55:18,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-19 14:55:18,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:55:18,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:55:18,770 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-19 14:55:18,876 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:55:18,877 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:55:19,071 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:55:19,079 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:55:19,079 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-19 14:55:19,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:55:19 BoogieIcfgContainer [2021-11-19 14:55:19,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:55:19,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:55:19,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:55:19,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:55:19,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:55:17" (1/3) ... [2021-11-19 14:55:19,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd372cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:55:19, skipping insertion in model container [2021-11-19 14:55:19,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:18" (2/3) ... [2021-11-19 14:55:19,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd372cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:55:19, skipping insertion in model container [2021-11-19 14:55:19,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:55:19" (3/3) ... [2021-11-19 14:55:19,091 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_unsafe-7.i [2021-11-19 14:55:19,097 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-19 14:55:19,097 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:55:19,098 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:55:19,098 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-19 14:55:19,155 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,156 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,156 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,156 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,157 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,169 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,169 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,169 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,170 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,170 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,171 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,171 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,171 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,172 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,172 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,172 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,173 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,173 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,173 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,174 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,174 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,174 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,174 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,174 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,175 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,175 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,176 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,176 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,176 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,176 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,177 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,177 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,177 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,178 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,178 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,178 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,181 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,182 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,189 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,189 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,189 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,193 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,194 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,194 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,194 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,195 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:55:19,196 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-11-19 14:55:19,242 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:55:19,249 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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 [2021-11-19 14:55:19,249 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-19 14:55:19,264 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-19 14:55:19,279 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 96 transitions, 202 flow [2021-11-19 14:55:19,283 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 96 transitions, 202 flow [2021-11-19 14:55:19,285 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 96 places, 96 transitions, 202 flow [2021-11-19 14:55:19,341 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2021-11-19 14:55:19,341 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-19 14:55:19,347 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2021-11-19 14:55:19,352 INFO L116 LiptonReduction]: Number of co-enabled transitions 1870 [2021-11-19 14:55:23,009 INFO L131 LiptonReduction]: Checked pairs total: 1462 [2021-11-19 14:55:23,009 INFO L133 LiptonReduction]: Total number of compositions: 92 [2021-11-19 14:55:23,019 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2021-11-19 14:55:23,031 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 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) [2021-11-19 14:55:23,033 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 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) [2021-11-19 14:55:23,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-19 14:55:23,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:55:23,039 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-19 14:55:23,040 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 14:55:23,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:55:23,045 INFO L85 PathProgramCache]: Analyzing trace with hash -2083717598, now seen corresponding path program 1 times [2021-11-19 14:55:23,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:55:23,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986903021] [2021-11-19 14:55:23,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:55:23,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:55:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:55:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:55:23,258 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:55:23,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986903021] [2021-11-19 14:55:23,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986903021] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:55:23,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:55:23,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 14:55:23,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847005786] [2021-11-19 14:55:23,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:55:23,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:55:23,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:55:23,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:55:23,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:55:23,309 INFO L87 Difference]: Start difference. First operand has 35 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 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, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-19 14:55:23,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:55:23,371 INFO L93 Difference]: Finished difference Result 44 states and 122 transitions. [2021-11-19 14:55:23,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:55:23,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-11-19 14:55:23,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:55:23,387 INFO L225 Difference]: With dead ends: 44 [2021-11-19 14:55:23,387 INFO L226 Difference]: Without dead ends: 44 [2021-11-19 14:55:23,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:55:23,394 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:55:23,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:55:23,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-19 14:55:23,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-19 14:55:23,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 43 states have internal predecessors, (122), 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) [2021-11-19 14:55:23,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 122 transitions. [2021-11-19 14:55:23,441 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 122 transitions. Word has length 6 [2021-11-19 14:55:23,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:55:23,442 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 122 transitions. [2021-11-19 14:55:23,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-19 14:55:23,444 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 122 transitions. [2021-11-19 14:55:23,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 14:55:23,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:55:23,445 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:55:23,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:55:23,446 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 14:55:23,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:55:23,449 INFO L85 PathProgramCache]: Analyzing trace with hash -170735922, now seen corresponding path program 1 times [2021-11-19 14:55:23,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:55:23,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653744844] [2021-11-19 14:55:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:55:23,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:55:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:55:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:55:23,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:55:23,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653744844] [2021-11-19 14:55:23,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653744844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:55:23,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485429477] [2021-11-19 14:55:23,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:55:23,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:55:23,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:55:23,571 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:55:23,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 14:55:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:55:23,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:55:23,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:55:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:55:23,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:55:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:55:23,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485429477] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:55:23,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2033269300] [2021-11-19 14:55:23,799 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-19 14:55:23,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:55:23,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-19 14:55:23,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452855589] [2021-11-19 14:55:23,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:55:23,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:55:23,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:55:23,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:55:23,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:55:23,806 INFO L87 Difference]: Start difference. First operand 44 states and 122 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 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) [2021-11-19 14:55:23,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:55:23,923 INFO L93 Difference]: Finished difference Result 71 states and 203 transitions. [2021-11-19 14:55:23,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:55:23,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 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 7 [2021-11-19 14:55:23,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:55:23,927 INFO L225 Difference]: With dead ends: 71 [2021-11-19 14:55:23,927 INFO L226 Difference]: Without dead ends: 71 [2021-11-19 14:55:23,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:55:23,929 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:55:23,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:55:23,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-19 14:55:23,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-11-19 14:55:23,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.9) internal successors, (203), 70 states have internal predecessors, (203), 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) [2021-11-19 14:55:23,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 203 transitions. [2021-11-19 14:55:23,946 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 203 transitions. Word has length 7 [2021-11-19 14:55:23,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:55:23,962 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 203 transitions. [2021-11-19 14:55:23,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 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) [2021-11-19 14:55:23,962 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 203 transitions. [2021-11-19 14:55:23,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 14:55:23,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:55:23,964 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-11-19 14:55:24,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:55:24,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:55:24,180 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 14:55:24,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:55:24,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1152399070, now seen corresponding path program 2 times [2021-11-19 14:55:24,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:55:24,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71879762] [2021-11-19 14:55:24,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:55:24,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:55:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:55:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:55:24,273 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:55:24,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71879762] [2021-11-19 14:55:24,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71879762] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:55:24,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536781806] [2021-11-19 14:55:24,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:55:24,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:55:24,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:55:24,277 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:55:24,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 14:55:24,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 14:55:24,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:55:24,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:55:24,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:55:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:55:24,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:55:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:55:24,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536781806] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:55:24,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1400770349] [2021-11-19 14:55:24,579 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-19 14:55:24,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:55:24,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-19 14:55:24,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060298648] [2021-11-19 14:55:24,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:55:24,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:55:24,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:55:24,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:55:24,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:55:24,584 INFO L87 Difference]: Start difference. First operand 71 states and 203 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 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) [2021-11-19 14:55:24,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:55:24,798 INFO L93 Difference]: Finished difference Result 125 states and 365 transitions. [2021-11-19 14:55:24,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:55:24,799 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 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 10 [2021-11-19 14:55:24,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:55:24,803 INFO L225 Difference]: With dead ends: 125 [2021-11-19 14:55:24,803 INFO L226 Difference]: Without dead ends: 125 [2021-11-19 14:55:24,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:55:24,806 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 123 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:55:24,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:55:24,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-19 14:55:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-19 14:55:24,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.943548387096774) internal successors, (365), 124 states have internal predecessors, (365), 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) [2021-11-19 14:55:24,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 365 transitions. [2021-11-19 14:55:24,832 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 365 transitions. Word has length 10 [2021-11-19 14:55:24,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:55:24,832 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 365 transitions. [2021-11-19 14:55:24,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 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) [2021-11-19 14:55:24,833 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 365 transitions. [2021-11-19 14:55:24,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-19 14:55:24,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:55:24,836 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2021-11-19 14:55:24,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:55:25,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:55:25,058 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 14:55:25,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:55:25,058 INFO L85 PathProgramCache]: Analyzing trace with hash -981423710, now seen corresponding path program 3 times [2021-11-19 14:55:25,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:55:25,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244602530] [2021-11-19 14:55:25,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:55:25,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:55:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:55:25,276 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:55:25,276 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:55:25,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244602530] [2021-11-19 14:55:25,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244602530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:55:25,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338788298] [2021-11-19 14:55:25,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:55:25,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:55:25,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:55:25,282 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:55:25,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 14:55:25,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:55:25,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:55:25,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:55:25,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:55:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:55:25,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:55:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:55:25,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338788298] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:55:25,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [217064557] [2021-11-19 14:55:25,611 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-19 14:55:25,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:55:25,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 18 [2021-11-19 14:55:25,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454419477] [2021-11-19 14:55:25,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:55:25,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 14:55:25,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:55:25,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 14:55:25,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:55:25,617 INFO L87 Difference]: Start difference. First operand 125 states and 365 transitions. Second operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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) [2021-11-19 14:55:25,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:55:25,844 INFO L93 Difference]: Finished difference Result 179 states and 527 transitions. [2021-11-19 14:55:25,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 14:55:25,845 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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 [2021-11-19 14:55:25,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:55:25,854 INFO L225 Difference]: With dead ends: 179 [2021-11-19 14:55:25,854 INFO L226 Difference]: Without dead ends: 179 [2021-11-19 14:55:25,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:55:25,863 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 207 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:55:25,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 0 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:55:25,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-19 14:55:25,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-11-19 14:55:25,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.960674157303371) internal successors, (527), 178 states have internal predecessors, (527), 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) [2021-11-19 14:55:25,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 527 transitions. [2021-11-19 14:55:25,905 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 527 transitions. Word has length 16 [2021-11-19 14:55:25,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:55:25,906 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 527 transitions. [2021-11-19 14:55:25,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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) [2021-11-19 14:55:25,906 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 527 transitions. [2021-11-19 14:55:25,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 14:55:25,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:55:25,908 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1] [2021-11-19 14:55:25,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:55:26,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:55:26,131 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 14:55:26,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:55:26,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1386687010, now seen corresponding path program 4 times [2021-11-19 14:55:26,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:55:26,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141187875] [2021-11-19 14:55:26,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:55:26,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:55:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:55:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:55:26,808 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:55:26,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141187875] [2021-11-19 14:55:26,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141187875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:55:26,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691720717] [2021-11-19 14:55:26,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:55:26,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:55:26,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:55:26,810 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:55:26,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 14:55:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:55:26,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-19 14:55:26,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:55:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:55:27,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:56:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:56:57,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691720717] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:56:57,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [896119922] [2021-11-19 14:56:57,774 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-19 14:56:57,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:56:57,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2021-11-19 14:56:57,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271968890] [2021-11-19 14:56:57,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:56:57,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-19 14:56:57,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:56:57,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-19 14:56:57,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=2254, Unknown=26, NotChecked=0, Total=2756 [2021-11-19 14:56:57,794 INFO L87 Difference]: Start difference. First operand 179 states and 527 transitions. Second operand has 53 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 52 states have internal predecessors, (66), 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) [2021-11-19 14:57:02,679 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse7 (* 2 c_~cur~0))) (let ((.cse1 (+ c_~prev~0 c_~cur~0 1)) (.cse4 (+ .cse7 c_~prev~0)) (.cse5 (+ (* 987 c_~cur~0) (* 610 c_~prev~0))) (.cse0 (* c_~j~0 (- 1))) (.cse6 (+ (* 2 c_~prev~0) 2 (* 4 c_~cur~0))) (.cse2 (* c_~i~0 (- 1))) (.cse3 (+ .cse7 c_~prev~0 1))) (and (forall ((aux_div_v_~cur~0_66_50 Int) (v_~cur~0_71 Int) (v_~cur~0_73 Int) (aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~cur~0_66_50 Int) (v_~cur~0_69 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (< v_~cur~0_69 (+ c_~prev~0 c_~cur~0 (* 2 v_~cur~0_71) v_~cur~0_73)) (< v_~cur~0_73 (+ (* 2 c_~cur~0) c_~prev~0)) (< (+ 5 c_~i~0 aux_mod_v_~prev~0_79_49) (+ c_~prev~0 c_~cur~0 (* 2 v_~cur~0_69) (* 2 aux_div_v_~prev~0_79_49) v_~cur~0_73 v_~cur~0_71)) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 4 v_~cur~0_69) (* 2 aux_mod_v_~prev~0_79_49) 8 (* 2 c_~i~0) (* 8 aux_div_v_~cur~0_66_50))) (< aux_mod_v_~cur~0_66_50 0) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49) (< aux_div_v_~cur~0_66_50 (+ c_~prev~0 c_~cur~0 v_~cur~0_69 v_~cur~0_73 v_~cur~0_71 1)) (< v_~cur~0_71 (+ (* 2 v_~cur~0_73) c_~prev~0 c_~cur~0)))) (forall ((v_~cur~0_66 Int)) (or (< v_~cur~0_66 (+ c_~prev~0 c_~cur~0)) (and (forall ((aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= (* 5 aux_div_v_~prev~0_79_49) (+ (* 4 v_~cur~0_66) (* 2 aux_mod_v_~prev~0_79_49) (* 2 c_~j~0) 12)) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49) (< (+ 5 c_~j~0 aux_mod_v_~prev~0_79_49) (+ c_~cur~0 (* 2 aux_div_v_~prev~0_79_49))))) (forall ((aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (< (+ 5 c_~i~0 aux_mod_v_~prev~0_79_49) (+ c_~cur~0 (* 2 aux_div_v_~prev~0_79_49))) (<= (* 5 aux_div_v_~prev~0_79_49) (+ (* 4 v_~cur~0_66) (* 2 aux_mod_v_~prev~0_79_49) 12 (* 2 c_~i~0))) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49)))))) (forall ((aux_div_v_~prev~0_79_49 Int) (v_~cur~0_66 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= (* 5 aux_div_v_~prev~0_79_49) (+ (* 4 v_~cur~0_66) (* 2 aux_mod_v_~prev~0_79_49) 12 (* 2 c_~i~0))) (< v_~cur~0_66 (+ (* 2 c_~cur~0) c_~prev~0)) (< aux_mod_v_~prev~0_79_49 0) (< (+ 5 c_~i~0 aux_mod_v_~prev~0_79_49) (+ c_~prev~0 c_~cur~0 (* 2 aux_div_v_~prev~0_79_49))) (<= 2 aux_mod_v_~prev~0_79_49))) (forall ((aux_div_v_~prev~0_79_49 Int) (v_~cur~0_66 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (< (+ 5 c_~j~0 aux_mod_v_~prev~0_79_49) (+ c_~prev~0 c_~cur~0 (* 2 aux_div_v_~prev~0_79_49))) (<= (* 5 aux_div_v_~prev~0_79_49) (+ (* 4 v_~cur~0_66) (* 2 aux_mod_v_~prev~0_79_49) (* 2 c_~j~0) 12)) (< v_~cur~0_66 (+ (* 2 c_~cur~0) c_~prev~0)) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49))) (forall ((aux_div_v_~cur~0_66_50 Int) (v_~cur~0_71 Int) (v_~cur~0_73 Int) (aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~cur~0_66_50 Int) (v_~cur~0_69 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (< (+ 5 c_~j~0 aux_mod_v_~prev~0_79_49) (+ c_~prev~0 c_~cur~0 (* 2 v_~cur~0_69) (* 2 aux_div_v_~prev~0_79_49) v_~cur~0_73 v_~cur~0_71)) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 4 v_~cur~0_69) (* 2 aux_mod_v_~prev~0_79_49) (* 2 c_~j~0) 8 (* 8 aux_div_v_~cur~0_66_50))) (< v_~cur~0_69 (+ c_~prev~0 c_~cur~0 (* 2 v_~cur~0_71) v_~cur~0_73)) (< v_~cur~0_73 (+ (* 2 c_~cur~0) c_~prev~0)) (< aux_mod_v_~cur~0_66_50 0) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49) (< aux_div_v_~cur~0_66_50 (+ c_~prev~0 c_~cur~0 v_~cur~0_69 v_~cur~0_73 v_~cur~0_71 1)) (< v_~cur~0_71 (+ (* 2 v_~cur~0_73) c_~prev~0 c_~cur~0)))) (= c_~j~0 1) (forall ((aux_div_v_~cur~0_66_50 Int) (aux_mod_v_~cur~0_66_50 Int) (aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 2 aux_mod_v_~prev~0_79_49) 8 (* 4 c_~cur~0) (* 2 c_~i~0) (* 8 aux_div_v_~cur~0_66_50))) (< (+ 5 c_~i~0 aux_mod_v_~prev~0_79_49) (+ (* 2 c_~cur~0) c_~prev~0 (* 2 aux_div_v_~prev~0_79_49))) (< aux_mod_v_~cur~0_66_50 0) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49) (< aux_div_v_~cur~0_66_50 (+ c_~prev~0 c_~cur~0 1)))) (forall ((aux_div_v_~cur~0_66_50 Int) (aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~cur~0_66_50 Int) (v_~cur~0_69 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (< aux_div_v_~cur~0_66_50 (+ c_~prev~0 c_~cur~0 v_~cur~0_69 1)) (< v_~cur~0_69 (+ (* 2 c_~cur~0) c_~prev~0)) (< (+ 5 c_~i~0 aux_mod_v_~prev~0_79_49) (+ c_~prev~0 c_~cur~0 (* 2 v_~cur~0_69) (* 2 aux_div_v_~prev~0_79_49))) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 4 v_~cur~0_69) (* 2 aux_mod_v_~prev~0_79_49) 8 (* 2 c_~i~0) (* 8 aux_div_v_~cur~0_66_50))) (< aux_mod_v_~cur~0_66_50 0) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49))) (< (div (+ .cse0 (- 1) c_~cur~0) (- 2)) .cse1) (< (div (+ (- 1) .cse2 c_~cur~0) (- 2)) .cse1) (<= (div (+ .cse0 c_~prev~0 c_~cur~0 (- 3)) (- 2)) .cse3) (< c_~i~0 .cse4) (forall ((v_~cur~0_73 Int)) (or (and (forall ((aux_div_v_~cur~0_66_50 Int) (v_~cur~0_71 Int) (aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~cur~0_66_50 Int) (v_~cur~0_69 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (< v_~cur~0_69 (+ c_~cur~0 (* 2 v_~cur~0_71) v_~cur~0_73)) (< (+ 5 c_~i~0 aux_mod_v_~prev~0_79_49) (+ c_~cur~0 (* 2 v_~cur~0_69) (* 2 aux_div_v_~prev~0_79_49) v_~cur~0_73 v_~cur~0_71)) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 4 v_~cur~0_69) (* 2 aux_mod_v_~prev~0_79_49) 8 (* 2 c_~i~0) (* 8 aux_div_v_~cur~0_66_50))) (< v_~cur~0_71 (+ (* 2 v_~cur~0_73) c_~cur~0)) (< aux_mod_v_~cur~0_66_50 0) (< aux_mod_v_~prev~0_79_49 0) (< aux_div_v_~cur~0_66_50 (+ c_~cur~0 v_~cur~0_69 v_~cur~0_73 v_~cur~0_71 1)) (<= 2 aux_mod_v_~prev~0_79_49))) (forall ((aux_div_v_~cur~0_66_50 Int) (v_~cur~0_71 Int) (aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~cur~0_66_50 Int) (v_~cur~0_69 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (< v_~cur~0_69 (+ c_~cur~0 (* 2 v_~cur~0_71) v_~cur~0_73)) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 4 v_~cur~0_69) (* 2 aux_mod_v_~prev~0_79_49) (* 2 c_~j~0) 8 (* 8 aux_div_v_~cur~0_66_50))) (< (+ 5 c_~j~0 aux_mod_v_~prev~0_79_49) (+ c_~cur~0 (* 2 v_~cur~0_69) (* 2 aux_div_v_~prev~0_79_49) v_~cur~0_73 v_~cur~0_71)) (< v_~cur~0_71 (+ (* 2 v_~cur~0_73) c_~cur~0)) (< aux_mod_v_~cur~0_66_50 0) (< aux_mod_v_~prev~0_79_49 0) (< aux_div_v_~cur~0_66_50 (+ c_~cur~0 v_~cur~0_69 v_~cur~0_73 v_~cur~0_71 1)) (<= 2 aux_mod_v_~prev~0_79_49)))) (< v_~cur~0_73 (+ c_~prev~0 c_~cur~0)))) (<= (+ c_~i~0 986) .cse5) (<= (div (+ .cse2 c_~prev~0 (- 5)) (- 2)) .cse6) (< c_~j~0 .cse4) (<= 987 .cse5) (<= (div (+ .cse0 c_~prev~0 (- 5)) (- 2)) .cse6) (forall ((v_~cur~0_71 Int)) (or (and (forall ((aux_div_v_~cur~0_66_50 Int) (aux_mod_v_~cur~0_66_50 Int) (aux_div_v_~prev~0_79_49 Int) (v_~cur~0_69 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 4 v_~cur~0_69) (* 2 aux_mod_v_~prev~0_79_49) (* 2 c_~j~0) 8 (* 8 aux_div_v_~cur~0_66_50))) (< (+ 5 c_~j~0 aux_mod_v_~prev~0_79_49) (+ c_~cur~0 (* 2 v_~cur~0_69) (* 2 aux_div_v_~prev~0_79_49) v_~cur~0_71)) (< aux_div_v_~cur~0_66_50 (+ c_~cur~0 v_~cur~0_69 v_~cur~0_71 1)) (< aux_mod_v_~cur~0_66_50 0) (< v_~cur~0_69 (+ c_~cur~0 (* 2 v_~cur~0_71))) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49))) (forall ((aux_div_v_~cur~0_66_50 Int) (aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~cur~0_66_50 Int) (v_~cur~0_69 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (< (+ 5 c_~i~0 aux_mod_v_~prev~0_79_49) (+ c_~cur~0 (* 2 v_~cur~0_69) (* 2 aux_div_v_~prev~0_79_49) v_~cur~0_71)) (< aux_div_v_~cur~0_66_50 (+ c_~cur~0 v_~cur~0_69 v_~cur~0_71 1)) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 4 v_~cur~0_69) (* 2 aux_mod_v_~prev~0_79_49) 8 (* 2 c_~i~0) (* 8 aux_div_v_~cur~0_66_50))) (< aux_mod_v_~cur~0_66_50 0) (< v_~cur~0_69 (+ c_~cur~0 (* 2 v_~cur~0_71))) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49)))) (< v_~cur~0_71 (+ c_~prev~0 c_~cur~0)))) (<= (div (+ .cse2 c_~prev~0 c_~cur~0 (- 3)) (- 2)) .cse3) (forall ((aux_div_v_~cur~0_66_50 Int) (aux_mod_v_~cur~0_66_50 Int) (aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (< (+ 5 c_~j~0 aux_mod_v_~prev~0_79_49) (+ (* 2 c_~cur~0) c_~prev~0 (* 2 aux_div_v_~prev~0_79_49))) (< aux_mod_v_~cur~0_66_50 0) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49) (< aux_div_v_~cur~0_66_50 (+ c_~prev~0 c_~cur~0 1)) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 2 aux_mod_v_~prev~0_79_49) (* 2 c_~j~0) 8 (* 4 c_~cur~0) (* 8 aux_div_v_~cur~0_66_50))))) (forall ((v_~cur~0_69 Int)) (or (and (forall ((aux_div_v_~cur~0_66_50 Int) (aux_mod_v_~cur~0_66_50 Int) (aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 4 v_~cur~0_69) (* 2 aux_mod_v_~prev~0_79_49) (* 2 c_~j~0) 8 (* 8 aux_div_v_~cur~0_66_50))) (< (+ 5 c_~j~0 aux_mod_v_~prev~0_79_49) (+ c_~cur~0 (* 2 v_~cur~0_69) (* 2 aux_div_v_~prev~0_79_49))) (< aux_div_v_~cur~0_66_50 (+ c_~cur~0 v_~cur~0_69 1)) (< aux_mod_v_~cur~0_66_50 0) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49))) (forall ((aux_div_v_~cur~0_66_50 Int) (aux_mod_v_~cur~0_66_50 Int) (aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (< aux_div_v_~cur~0_66_50 (+ c_~cur~0 v_~cur~0_69 1)) (< (+ 5 c_~i~0 aux_mod_v_~prev~0_79_49) (+ c_~cur~0 (* 2 v_~cur~0_69) (* 2 aux_div_v_~prev~0_79_49))) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 4 v_~cur~0_69) (* 2 aux_mod_v_~prev~0_79_49) 8 (* 2 c_~i~0) (* 8 aux_div_v_~cur~0_66_50))) (< aux_mod_v_~cur~0_66_50 0) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49)))) (< v_~cur~0_69 (+ c_~prev~0 c_~cur~0)))) (forall ((aux_div_v_~cur~0_66_50 Int) (v_~cur~0_71 Int) (aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~cur~0_66_50 Int) (v_~cur~0_69 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (< (+ 5 c_~j~0 aux_mod_v_~prev~0_79_49) (+ c_~prev~0 c_~cur~0 (* 2 v_~cur~0_69) (* 2 aux_div_v_~prev~0_79_49) v_~cur~0_71)) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 4 v_~cur~0_69) (* 2 aux_mod_v_~prev~0_79_49) (* 2 c_~j~0) 8 (* 8 aux_div_v_~cur~0_66_50))) (< aux_div_v_~cur~0_66_50 (+ c_~prev~0 c_~cur~0 v_~cur~0_69 v_~cur~0_71 1)) (< v_~cur~0_69 (+ c_~prev~0 c_~cur~0 (* 2 v_~cur~0_71))) (< aux_mod_v_~cur~0_66_50 0) (< aux_mod_v_~prev~0_79_49 0) (< v_~cur~0_71 (+ (* 2 c_~cur~0) c_~prev~0)) (<= 2 aux_mod_v_~prev~0_79_49))) (forall ((aux_div_v_~cur~0_66_50 Int) (v_~cur~0_71 Int) (aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~cur~0_66_50 Int) (v_~cur~0_69 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (< (+ 5 c_~i~0 aux_mod_v_~prev~0_79_49) (+ c_~prev~0 c_~cur~0 (* 2 v_~cur~0_69) (* 2 aux_div_v_~prev~0_79_49) v_~cur~0_71)) (< aux_div_v_~cur~0_66_50 (+ c_~prev~0 c_~cur~0 v_~cur~0_69 v_~cur~0_71 1)) (< v_~cur~0_69 (+ c_~prev~0 c_~cur~0 (* 2 v_~cur~0_71))) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 4 v_~cur~0_69) (* 2 aux_mod_v_~prev~0_79_49) 8 (* 2 c_~i~0) (* 8 aux_div_v_~cur~0_66_50))) (< aux_mod_v_~cur~0_66_50 0) (< aux_mod_v_~prev~0_79_49 0) (< v_~cur~0_71 (+ (* 2 c_~cur~0) c_~prev~0)) (<= 2 aux_mod_v_~prev~0_79_49))) (forall ((aux_div_v_~cur~0_66_50 Int) (aux_mod_v_~cur~0_66_50 Int) (aux_div_v_~prev~0_79_49 Int) (v_~cur~0_69 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (< aux_div_v_~cur~0_66_50 (+ c_~prev~0 c_~cur~0 v_~cur~0_69 1)) (< v_~cur~0_69 (+ (* 2 c_~cur~0) c_~prev~0)) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 4 v_~cur~0_69) (* 2 aux_mod_v_~prev~0_79_49) (* 2 c_~j~0) 8 (* 8 aux_div_v_~cur~0_66_50))) (< (+ 5 c_~j~0 aux_mod_v_~prev~0_79_49) (+ c_~prev~0 c_~cur~0 (* 2 v_~cur~0_69) (* 2 aux_div_v_~prev~0_79_49))) (< aux_mod_v_~cur~0_66_50 0) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49)))))) is different from false [2021-11-19 14:57:04,965 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse10 (* 2 c_~cur~0))) (let ((.cse3 (+ c_~prev~0 c_~cur~0 1)) (.cse1 (+ (* 377 c_~prev~0) (* 610 c_~cur~0))) (.cse0 (+ c_~prev~0 c_~cur~0)) (.cse6 (+ c_~i~0 986)) (.cse7 (+ .cse10 c_~prev~0)) (.cse8 (+ (* 987 c_~cur~0) (* 610 c_~prev~0))) (.cse2 (* c_~j~0 (- 1))) (.cse9 (+ (* 2 c_~prev~0) 2 (* 4 c_~cur~0))) (.cse4 (* c_~i~0 (- 1))) (.cse5 (+ .cse10 c_~prev~0 1))) (and (< c_~j~0 .cse0) (forall ((v_~cur~0_66 Int)) (or (< v_~cur~0_66 (+ c_~prev~0 c_~cur~0)) (and (forall ((aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= (* 5 aux_div_v_~prev~0_79_49) (+ (* 4 v_~cur~0_66) (* 2 aux_mod_v_~prev~0_79_49) (* 2 c_~j~0) 12)) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49) (< (+ 5 c_~j~0 aux_mod_v_~prev~0_79_49) (+ c_~cur~0 (* 2 aux_div_v_~prev~0_79_49))))) (forall ((aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (< (+ 5 c_~i~0 aux_mod_v_~prev~0_79_49) (+ c_~cur~0 (* 2 aux_div_v_~prev~0_79_49))) (<= (* 5 aux_div_v_~prev~0_79_49) (+ (* 4 v_~cur~0_66) (* 2 aux_mod_v_~prev~0_79_49) 12 (* 2 c_~i~0))) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49)))))) (forall ((aux_div_v_~prev~0_79_49 Int) (v_~cur~0_66 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= (* 5 aux_div_v_~prev~0_79_49) (+ (* 4 v_~cur~0_66) (* 2 aux_mod_v_~prev~0_79_49) 12 (* 2 c_~i~0))) (< v_~cur~0_66 (+ (* 2 c_~cur~0) c_~prev~0)) (< aux_mod_v_~prev~0_79_49 0) (< (+ 5 c_~i~0 aux_mod_v_~prev~0_79_49) (+ c_~prev~0 c_~cur~0 (* 2 aux_div_v_~prev~0_79_49))) (<= 2 aux_mod_v_~prev~0_79_49))) (<= 987 .cse1) (forall ((aux_div_v_~prev~0_79_49 Int) (v_~cur~0_66 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (< (+ 5 c_~j~0 aux_mod_v_~prev~0_79_49) (+ c_~prev~0 c_~cur~0 (* 2 aux_div_v_~prev~0_79_49))) (<= (* 5 aux_div_v_~prev~0_79_49) (+ (* 4 v_~cur~0_66) (* 2 aux_mod_v_~prev~0_79_49) (* 2 c_~j~0) 12)) (< v_~cur~0_66 (+ (* 2 c_~cur~0) c_~prev~0)) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49))) (= c_~j~0 1) (forall ((aux_div_v_~cur~0_66_50 Int) (aux_mod_v_~cur~0_66_50 Int) (aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 2 aux_mod_v_~prev~0_79_49) 8 (* 4 c_~cur~0) (* 2 c_~i~0) (* 8 aux_div_v_~cur~0_66_50))) (< (+ 5 c_~i~0 aux_mod_v_~prev~0_79_49) (+ (* 2 c_~cur~0) c_~prev~0 (* 2 aux_div_v_~prev~0_79_49))) (< aux_mod_v_~cur~0_66_50 0) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49) (< aux_div_v_~cur~0_66_50 (+ c_~prev~0 c_~cur~0 1)))) (forall ((aux_div_v_~cur~0_66_50 Int) (aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~cur~0_66_50 Int) (v_~cur~0_69 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (< aux_div_v_~cur~0_66_50 (+ c_~prev~0 c_~cur~0 v_~cur~0_69 1)) (< v_~cur~0_69 (+ (* 2 c_~cur~0) c_~prev~0)) (< (+ 5 c_~i~0 aux_mod_v_~prev~0_79_49) (+ c_~prev~0 c_~cur~0 (* 2 v_~cur~0_69) (* 2 aux_div_v_~prev~0_79_49))) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 4 v_~cur~0_69) (* 2 aux_mod_v_~prev~0_79_49) 8 (* 2 c_~i~0) (* 8 aux_div_v_~cur~0_66_50))) (< aux_mod_v_~cur~0_66_50 0) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49))) (< (div (+ .cse2 (- 1) c_~cur~0) (- 2)) .cse3) (< (div (+ (- 1) .cse4 c_~cur~0) (- 2)) .cse3) (<= (div (+ .cse2 c_~prev~0 c_~cur~0 (- 3)) (- 2)) .cse5) (<= .cse6 .cse1) (< c_~i~0 .cse7) (< c_~i~0 .cse0) (forall ((v_~cur~0_73 Int)) (or (and (forall ((aux_div_v_~cur~0_66_50 Int) (v_~cur~0_71 Int) (aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~cur~0_66_50 Int) (v_~cur~0_69 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (< v_~cur~0_69 (+ c_~cur~0 (* 2 v_~cur~0_71) v_~cur~0_73)) (< (+ 5 c_~i~0 aux_mod_v_~prev~0_79_49) (+ c_~cur~0 (* 2 v_~cur~0_69) (* 2 aux_div_v_~prev~0_79_49) v_~cur~0_73 v_~cur~0_71)) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 4 v_~cur~0_69) (* 2 aux_mod_v_~prev~0_79_49) 8 (* 2 c_~i~0) (* 8 aux_div_v_~cur~0_66_50))) (< v_~cur~0_71 (+ (* 2 v_~cur~0_73) c_~cur~0)) (< aux_mod_v_~cur~0_66_50 0) (< aux_mod_v_~prev~0_79_49 0) (< aux_div_v_~cur~0_66_50 (+ c_~cur~0 v_~cur~0_69 v_~cur~0_73 v_~cur~0_71 1)) (<= 2 aux_mod_v_~prev~0_79_49))) (forall ((aux_div_v_~cur~0_66_50 Int) (v_~cur~0_71 Int) (aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~cur~0_66_50 Int) (v_~cur~0_69 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (< v_~cur~0_69 (+ c_~cur~0 (* 2 v_~cur~0_71) v_~cur~0_73)) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 4 v_~cur~0_69) (* 2 aux_mod_v_~prev~0_79_49) (* 2 c_~j~0) 8 (* 8 aux_div_v_~cur~0_66_50))) (< (+ 5 c_~j~0 aux_mod_v_~prev~0_79_49) (+ c_~cur~0 (* 2 v_~cur~0_69) (* 2 aux_div_v_~prev~0_79_49) v_~cur~0_73 v_~cur~0_71)) (< v_~cur~0_71 (+ (* 2 v_~cur~0_73) c_~cur~0)) (< aux_mod_v_~cur~0_66_50 0) (< aux_mod_v_~prev~0_79_49 0) (< aux_div_v_~cur~0_66_50 (+ c_~cur~0 v_~cur~0_69 v_~cur~0_73 v_~cur~0_71 1)) (<= 2 aux_mod_v_~prev~0_79_49)))) (< v_~cur~0_73 (+ c_~prev~0 c_~cur~0)))) (<= .cse6 .cse8) (<= (div (+ .cse4 c_~prev~0 (- 5)) (- 2)) .cse9) (< c_~j~0 .cse7) (<= 987 .cse8) (<= (div (+ .cse2 c_~prev~0 (- 5)) (- 2)) .cse9) (forall ((v_~cur~0_71 Int)) (or (and (forall ((aux_div_v_~cur~0_66_50 Int) (aux_mod_v_~cur~0_66_50 Int) (aux_div_v_~prev~0_79_49 Int) (v_~cur~0_69 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 4 v_~cur~0_69) (* 2 aux_mod_v_~prev~0_79_49) (* 2 c_~j~0) 8 (* 8 aux_div_v_~cur~0_66_50))) (< (+ 5 c_~j~0 aux_mod_v_~prev~0_79_49) (+ c_~cur~0 (* 2 v_~cur~0_69) (* 2 aux_div_v_~prev~0_79_49) v_~cur~0_71)) (< aux_div_v_~cur~0_66_50 (+ c_~cur~0 v_~cur~0_69 v_~cur~0_71 1)) (< aux_mod_v_~cur~0_66_50 0) (< v_~cur~0_69 (+ c_~cur~0 (* 2 v_~cur~0_71))) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49))) (forall ((aux_div_v_~cur~0_66_50 Int) (aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~cur~0_66_50 Int) (v_~cur~0_69 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (< (+ 5 c_~i~0 aux_mod_v_~prev~0_79_49) (+ c_~cur~0 (* 2 v_~cur~0_69) (* 2 aux_div_v_~prev~0_79_49) v_~cur~0_71)) (< aux_div_v_~cur~0_66_50 (+ c_~cur~0 v_~cur~0_69 v_~cur~0_71 1)) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 4 v_~cur~0_69) (* 2 aux_mod_v_~prev~0_79_49) 8 (* 2 c_~i~0) (* 8 aux_div_v_~cur~0_66_50))) (< aux_mod_v_~cur~0_66_50 0) (< v_~cur~0_69 (+ c_~cur~0 (* 2 v_~cur~0_71))) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49)))) (< v_~cur~0_71 (+ c_~prev~0 c_~cur~0)))) (<= (div (+ .cse4 c_~prev~0 c_~cur~0 (- 3)) (- 2)) .cse5) (forall ((aux_div_v_~cur~0_66_50 Int) (aux_mod_v_~cur~0_66_50 Int) (aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (< (+ 5 c_~j~0 aux_mod_v_~prev~0_79_49) (+ (* 2 c_~cur~0) c_~prev~0 (* 2 aux_div_v_~prev~0_79_49))) (< aux_mod_v_~cur~0_66_50 0) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49) (< aux_div_v_~cur~0_66_50 (+ c_~prev~0 c_~cur~0 1)) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 2 aux_mod_v_~prev~0_79_49) (* 2 c_~j~0) 8 (* 4 c_~cur~0) (* 8 aux_div_v_~cur~0_66_50))))) (forall ((v_~cur~0_69 Int)) (or (and (forall ((aux_div_v_~cur~0_66_50 Int) (aux_mod_v_~cur~0_66_50 Int) (aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 4 v_~cur~0_69) (* 2 aux_mod_v_~prev~0_79_49) (* 2 c_~j~0) 8 (* 8 aux_div_v_~cur~0_66_50))) (< (+ 5 c_~j~0 aux_mod_v_~prev~0_79_49) (+ c_~cur~0 (* 2 v_~cur~0_69) (* 2 aux_div_v_~prev~0_79_49))) (< aux_div_v_~cur~0_66_50 (+ c_~cur~0 v_~cur~0_69 1)) (< aux_mod_v_~cur~0_66_50 0) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49))) (forall ((aux_div_v_~cur~0_66_50 Int) (aux_mod_v_~cur~0_66_50 Int) (aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (< aux_div_v_~cur~0_66_50 (+ c_~cur~0 v_~cur~0_69 1)) (< (+ 5 c_~i~0 aux_mod_v_~prev~0_79_49) (+ c_~cur~0 (* 2 v_~cur~0_69) (* 2 aux_div_v_~prev~0_79_49))) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 4 v_~cur~0_69) (* 2 aux_mod_v_~prev~0_79_49) 8 (* 2 c_~i~0) (* 8 aux_div_v_~cur~0_66_50))) (< aux_mod_v_~cur~0_66_50 0) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49)))) (< v_~cur~0_69 (+ c_~prev~0 c_~cur~0)))) (forall ((aux_div_v_~cur~0_66_50 Int) (v_~cur~0_71 Int) (aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~cur~0_66_50 Int) (v_~cur~0_69 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (< (+ 5 c_~j~0 aux_mod_v_~prev~0_79_49) (+ c_~prev~0 c_~cur~0 (* 2 v_~cur~0_69) (* 2 aux_div_v_~prev~0_79_49) v_~cur~0_71)) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 4 v_~cur~0_69) (* 2 aux_mod_v_~prev~0_79_49) (* 2 c_~j~0) 8 (* 8 aux_div_v_~cur~0_66_50))) (< aux_div_v_~cur~0_66_50 (+ c_~prev~0 c_~cur~0 v_~cur~0_69 v_~cur~0_71 1)) (< v_~cur~0_69 (+ c_~prev~0 c_~cur~0 (* 2 v_~cur~0_71))) (< aux_mod_v_~cur~0_66_50 0) (< aux_mod_v_~prev~0_79_49 0) (< v_~cur~0_71 (+ (* 2 c_~cur~0) c_~prev~0)) (<= 2 aux_mod_v_~prev~0_79_49))) (forall ((aux_div_v_~cur~0_66_50 Int) (v_~cur~0_71 Int) (aux_div_v_~prev~0_79_49 Int) (aux_mod_v_~cur~0_66_50 Int) (v_~cur~0_69 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (< (+ 5 c_~i~0 aux_mod_v_~prev~0_79_49) (+ c_~prev~0 c_~cur~0 (* 2 v_~cur~0_69) (* 2 aux_div_v_~prev~0_79_49) v_~cur~0_71)) (< aux_div_v_~cur~0_66_50 (+ c_~prev~0 c_~cur~0 v_~cur~0_69 v_~cur~0_71 1)) (< v_~cur~0_69 (+ c_~prev~0 c_~cur~0 (* 2 v_~cur~0_71))) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 4 v_~cur~0_69) (* 2 aux_mod_v_~prev~0_79_49) 8 (* 2 c_~i~0) (* 8 aux_div_v_~cur~0_66_50))) (< aux_mod_v_~cur~0_66_50 0) (< aux_mod_v_~prev~0_79_49 0) (< v_~cur~0_71 (+ (* 2 c_~cur~0) c_~prev~0)) (<= 2 aux_mod_v_~prev~0_79_49))) (forall ((aux_div_v_~cur~0_66_50 Int) (aux_mod_v_~cur~0_66_50 Int) (aux_div_v_~prev~0_79_49 Int) (v_~cur~0_69 Int) (aux_mod_v_~prev~0_79_49 Int)) (or (<= 2 aux_mod_v_~cur~0_66_50) (< aux_div_v_~cur~0_66_50 (+ c_~prev~0 c_~cur~0 v_~cur~0_69 1)) (< v_~cur~0_69 (+ (* 2 c_~cur~0) c_~prev~0)) (<= (+ (* 4 aux_mod_v_~cur~0_66_50) (* 5 aux_div_v_~prev~0_79_49)) (+ (* 4 v_~cur~0_69) (* 2 aux_mod_v_~prev~0_79_49) (* 2 c_~j~0) 8 (* 8 aux_div_v_~cur~0_66_50))) (< (+ 5 c_~j~0 aux_mod_v_~prev~0_79_49) (+ c_~prev~0 c_~cur~0 (* 2 v_~cur~0_69) (* 2 aux_div_v_~prev~0_79_49))) (< aux_mod_v_~cur~0_66_50 0) (< aux_mod_v_~prev~0_79_49 0) (<= 2 aux_mod_v_~prev~0_79_49)))))) is different from false [2021-11-19 14:57:27,203 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-19 14:57:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-19 14:57:27,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 77.0s TimeCoverageRelationStatistics Valid=1078, Invalid=4304, Unknown=28, NotChecked=290, Total=5700 [2021-11-19 14:57:27,209 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 193 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 565 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:27,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 0 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 724 Invalid, 0 Unknown, 565 Unchecked, 0.8s Time] [2021-11-19 14:57:27,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-19 14:57:27,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:27,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:57:27,411 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:260) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:829) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:237) ... 49 more [2021-11-19 14:57:27,413 INFO L158 Benchmark]: Toolchain (without parser) took 129457.20ms. Allocated memory was 138.4MB in the beginning and 201.3MB in the end (delta: 62.9MB). Free memory was 103.6MB in the beginning and 113.7MB in the end (delta: -10.0MB). Peak memory consumption was 53.5MB. Max. memory is 16.1GB. [2021-11-19 14:57:27,414 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 94.4MB. Free memory was 48.4MB in the beginning and 48.4MB in the end (delta: 44.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:57:27,414 INFO L158 Benchmark]: CACSL2BoogieTranslator took 612.36ms. Allocated memory is still 138.4MB. Free memory was 103.2MB in the beginning and 104.6MB in the end (delta: -1.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 14:57:27,415 INFO L158 Benchmark]: Boogie Procedure Inliner took 71.64ms. Allocated memory is still 138.4MB. Free memory was 104.6MB in the beginning and 102.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:57:27,415 INFO L158 Benchmark]: Boogie Preprocessor took 48.64ms. Allocated memory is still 138.4MB. Free memory was 102.9MB in the beginning and 101.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:57:27,416 INFO L158 Benchmark]: RCFGBuilder took 387.82ms. Allocated memory is still 138.4MB. Free memory was 101.2MB in the beginning and 87.8MB in the end (delta: 13.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:57:27,416 INFO L158 Benchmark]: TraceAbstraction took 128328.49ms. Allocated memory was 138.4MB in the beginning and 201.3MB in the end (delta: 62.9MB). Free memory was 87.4MB in the beginning and 113.7MB in the end (delta: -26.3MB). Peak memory consumption was 39.4MB. Max. memory is 16.1GB. [2021-11-19 14:57:27,419 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 94.4MB. Free memory was 48.4MB in the beginning and 48.4MB in the end (delta: 44.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 612.36ms. Allocated memory is still 138.4MB. Free memory was 103.2MB in the beginning and 104.6MB in the end (delta: -1.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 71.64ms. Allocated memory is still 138.4MB. Free memory was 104.6MB in the beginning and 102.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 48.64ms. Allocated memory is still 138.4MB. Free memory was 102.9MB in the beginning and 101.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 387.82ms. Allocated memory is still 138.4MB. Free memory was 101.2MB in the beginning and 87.8MB in the end (delta: 13.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 128328.49ms. Allocated memory was 138.4MB in the beginning and 201.3MB in the end (delta: 62.9MB). Free memory was 87.4MB in the beginning and 113.7MB in the end (delta: -26.3MB). Peak memory consumption was 39.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.7s, 96 PlacesBefore, 20 PlacesAfterwards, 96 TransitionsBefore, 16 TransitionsAfterwards, 1870 CoEnabledTransitionPairs, 6 FixpointIterations, 30 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 4 ChoiceCompositions, 92 TotalNumberOfCompositions, 1462 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1325, positive: 1316, positive conditional: 0, positive unconditional: 1316, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1176, positive: 1168, positive conditional: 0, positive unconditional: 1168, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1176, positive: 1168, positive conditional: 0, positive unconditional: 1168, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 8, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 28, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 28, negative conditional: 0, negative unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1325, positive: 148, positive conditional: 0, positive unconditional: 148, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 1176, unknown conditional: 0, unknown unconditional: 1176] , Statistics on independence cache: Total cache size (in pairs): 3, Positive cache size: 3, Positive conditional cache size: 0, Positive unconditional cache size: 3, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-7.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a938b9e3b803ef0b08d2618a78ac055be54a6e48f84c6853aab11e3467af8157 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:57:30,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:57:30,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:57:30,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:57:30,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:57:30,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:57:30,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:57:30,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:57:30,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:57:30,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:57:30,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:57:30,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:57:30,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:57:30,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:57:30,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:57:30,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:57:30,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:57:30,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:57:30,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:57:30,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:57:30,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:57:30,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:57:30,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:57:30,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:57:30,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:57:30,266 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:57:30,266 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:57:30,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:57:30,269 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:57:30,271 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:57:30,271 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:57:30,272 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:57:30,275 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:57:30,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:57:30,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:57:30,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:57:30,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:57:30,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:57:30,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:57:30,296 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:57:30,297 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:57:30,303 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:57:30,361 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:57:30,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:57:30,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:57:30,364 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:57:30,364 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:57:30,364 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:57:30,365 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:57:30,365 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:57:30,366 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:57:30,366 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:57:30,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:57:30,369 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:57:30,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:57:30,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:57:30,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:57:30,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:57:30,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:57:30,371 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:57:30,371 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:57:30,371 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:57:30,372 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:57:30,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:57:30,372 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:57:30,372 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:57:30,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:57:30,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:57:30,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:57:30,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:57:30,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:57:30,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:57:30,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:57:30,375 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:57:30,375 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:57:30,375 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:57:30,376 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:57:30,376 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:57:30,376 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a938b9e3b803ef0b08d2618a78ac055be54a6e48f84c6853aab11e3467af8157 [2021-11-19 14:57:30,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:57:30,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:57:30,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:57:30,963 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:57:30,964 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:57:30,966 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/pthread/fib_unsafe-7.i [2021-11-19 14:57:31,059 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/data/afafdad0c/7b53e183ce6e450680b1c0d65df56428/FLAG79c572f2b [2021-11-19 14:57:31,878 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:57:31,879 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/sv-benchmarks/c/pthread/fib_unsafe-7.i [2021-11-19 14:57:31,896 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/data/afafdad0c/7b53e183ce6e450680b1c0d65df56428/FLAG79c572f2b [2021-11-19 14:57:32,096 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/data/afafdad0c/7b53e183ce6e450680b1c0d65df56428 [2021-11-19 14:57:32,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:57:32,106 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:57:32,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:57:32,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:57:32,113 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:57:32,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:57:32" (1/1) ... [2021-11-19 14:57:32,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@daf7841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:32, skipping insertion in model container [2021-11-19 14:57:32,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:57:32" (1/1) ... [2021-11-19 14:57:32,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:57:32,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:57:32,669 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/sv-benchmarks/c/pthread/fib_unsafe-7.i[30811,30824] [2021-11-19 14:57:32,672 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:57:32,684 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:57:32,725 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/sv-benchmarks/c/pthread/fib_unsafe-7.i[30811,30824] [2021-11-19 14:57:32,727 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:57:32,768 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:57:32,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:32 WrapperNode [2021-11-19 14:57:32,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:57:32,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:57:32,770 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:57:32,770 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:57:32,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:32" (1/1) ... [2021-11-19 14:57:32,797 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:32" (1/1) ... [2021-11-19 14:57:32,822 INFO L137 Inliner]: procedures = 167, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2021-11-19 14:57:32,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:57:32,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:57:32,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:57:32,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:57:32,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:32" (1/1) ... [2021-11-19 14:57:32,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:32" (1/1) ... [2021-11-19 14:57:32,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:32" (1/1) ... [2021-11-19 14:57:32,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:32" (1/1) ... [2021-11-19 14:57:32,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:32" (1/1) ... [2021-11-19 14:57:32,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:32" (1/1) ... [2021-11-19 14:57:32,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:32" (1/1) ... [2021-11-19 14:57:32,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:57:32,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:57:32,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:57:32,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:57:32,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:32" (1/1) ... [2021-11-19 14:57:32,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:57:32,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:57:32,928 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:57:32,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:57:33,003 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-11-19 14:57:33,004 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-11-19 14:57:33,004 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-11-19 14:57:33,005 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-11-19 14:57:33,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-19 14:57:33,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:57:33,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:57:33,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:57:33,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:57:33,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:57:33,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-19 14:57:33,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:57:33,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:57:33,009 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-19 14:57:33,234 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:57:33,236 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:57:33,563 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:57:33,573 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:57:33,576 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-19 14:57:33,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:57:33 BoogieIcfgContainer [2021-11-19 14:57:33,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:57:33,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:57:33,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:57:33,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:57:33,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:57:32" (1/3) ... [2021-11-19 14:57:33,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3dcd05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:57:33, skipping insertion in model container [2021-11-19 14:57:33,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:32" (2/3) ... [2021-11-19 14:57:33,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3dcd05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:57:33, skipping insertion in model container [2021-11-19 14:57:33,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:57:33" (3/3) ... [2021-11-19 14:57:33,593 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_unsafe-7.i [2021-11-19 14:57:33,600 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-19 14:57:33,600 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:57:33,600 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:57:33,601 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-19 14:57:33,662 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,663 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,663 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,663 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,664 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,664 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,664 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,665 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,665 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,665 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,666 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,666 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,666 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,667 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,667 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,668 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,668 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,668 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,670 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,671 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,671 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,672 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,672 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,673 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,673 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,673 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,674 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,674 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,675 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,676 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,679 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,680 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,680 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,680 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,681 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,681 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,689 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,689 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,689 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,690 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,690 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,695 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,695 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,696 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,696 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,697 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 14:57:33,698 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-11-19 14:57:33,794 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:57:33,806 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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 [2021-11-19 14:57:33,806 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-19 14:57:33,831 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-19 14:57:33,850 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 96 transitions, 202 flow [2021-11-19 14:57:33,859 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 96 transitions, 202 flow [2021-11-19 14:57:33,862 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 96 places, 96 transitions, 202 flow [2021-11-19 14:57:33,953 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2021-11-19 14:57:33,953 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-19 14:57:33,960 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2021-11-19 14:57:33,967 INFO L116 LiptonReduction]: Number of co-enabled transitions 1826 [2021-11-19 14:57:41,394 INFO L131 LiptonReduction]: Checked pairs total: 1408 [2021-11-19 14:57:41,396 INFO L133 LiptonReduction]: Total number of compositions: 90 [2021-11-19 14:57:41,417 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2021-11-19 14:57:41,436 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 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) [2021-11-19 14:57:41,439 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 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) [2021-11-19 14:57:41,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-19 14:57:41,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:41,447 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-19 14:57:41,448 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 14:57:41,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:41,456 INFO L85 PathProgramCache]: Analyzing trace with hash -2112376477, now seen corresponding path program 1 times [2021-11-19 14:57:41,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:41,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848342317] [2021-11-19 14:57:41,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:41,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:41,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:41,482 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:41,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:57:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:41,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:57:41,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:41,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:41,794 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:57:41,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848342317] [2021-11-19 14:57:41,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848342317] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:57:41,796 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:57:41,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-19 14:57:41,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41972196] [2021-11-19 14:57:41,827 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:41,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:57:41,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:57:41,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:57:41,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:57:41,879 INFO L87 Difference]: Start difference. First operand has 35 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 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 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-19 14:57:42,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:42,007 INFO L93 Difference]: Finished difference Result 53 states and 149 transitions. [2021-11-19 14:57:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:57:42,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 6 [2021-11-19 14:57:42,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:42,023 INFO L225 Difference]: With dead ends: 53 [2021-11-19 14:57:42,023 INFO L226 Difference]: Without dead ends: 53 [2021-11-19 14:57:42,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:57:42,029 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:42,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:57:42,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-19 14:57:42,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-19 14:57:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.8653846153846154) internal successors, (149), 52 states have internal predecessors, (149), 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) [2021-11-19 14:57:42,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 149 transitions. [2021-11-19 14:57:42,077 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 149 transitions. Word has length 6 [2021-11-19 14:57:42,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:42,077 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 149 transitions. [2021-11-19 14:57:42,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-19 14:57:42,078 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 149 transitions. [2021-11-19 14:57:42,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 14:57:42,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:42,079 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:42,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:42,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:57:42,291 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 14:57:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:42,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733347, now seen corresponding path program 1 times [2021-11-19 14:57:42,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:42,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382370805] [2021-11-19 14:57:42,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:42,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:42,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:42,295 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:42,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:57:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:42,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:57:42,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:42,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:42,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:57:42,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382370805] [2021-11-19 14:57:42,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382370805] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:57:42,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2108848991] [2021-11-19 14:57:42,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:42,648 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:57:42,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:57:42,677 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:57:42,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-19 14:57:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:42,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:57:42,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:42,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:42,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2108848991] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:57:42,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685443050] [2021-11-19 14:57:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:42,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:57:42,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:57:42,942 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:57:42,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 14:57:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:43,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:57:43,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:43,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:43,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685443050] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:57:43,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:57:43,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-11-19 14:57:43,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967250197] [2021-11-19 14:57:43,128 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:57:43,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:57:43,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:57:43,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:57:43,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:57:43,130 INFO L87 Difference]: Start difference. First operand 53 states and 149 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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) [2021-11-19 14:57:43,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:43,416 INFO L93 Difference]: Finished difference Result 89 states and 257 transitions. [2021-11-19 14:57:43,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:57:43,417 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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 8 [2021-11-19 14:57:43,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:43,420 INFO L225 Difference]: With dead ends: 89 [2021-11-19 14:57:43,420 INFO L226 Difference]: Without dead ends: 89 [2021-11-19 14:57:43,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:57:43,422 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 120 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:43,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 0 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:57:43,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-19 14:57:43,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-19 14:57:43,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.9204545454545454) internal successors, (257), 88 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 257 transitions. [2021-11-19 14:57:43,455 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 257 transitions. Word has length 8 [2021-11-19 14:57:43,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:43,456 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 257 transitions. [2021-11-19 14:57:43,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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) [2021-11-19 14:57:43,456 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 257 transitions. [2021-11-19 14:57:43,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 14:57:43,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:43,458 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:43,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:43,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:43,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:44,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:57:44,059 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 14:57:44,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:44,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1157383395, now seen corresponding path program 2 times [2021-11-19 14:57:44,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:44,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18931885] [2021-11-19 14:57:44,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:57:44,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:44,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:44,062 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:44,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:57:44,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:57:44,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:57:44,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:57:44,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:44,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:44,528 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:44,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:57:44,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18931885] [2021-11-19 14:57:44,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18931885] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:57:44,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [467607303] [2021-11-19 14:57:44,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:57:44,529 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:57:44,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:57:44,535 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:57:44,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-19 14:57:44,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:57:44,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:57:44,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:57:44,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:44,805 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:44,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:44,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [467607303] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:57:44,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408452649] [2021-11-19 14:57:44,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:57:44,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:57:44,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:57:44,873 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:57:44,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 14:57:44,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:57:44,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:57:44,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:57:44,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:45,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:45,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408452649] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:57:45,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:57:45,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-19 14:57:45,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769865700] [2021-11-19 14:57:45,083 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:57:45,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 14:57:45,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:57:45,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 14:57:45,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:57:45,086 INFO L87 Difference]: Start difference. First operand 89 states and 257 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 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) [2021-11-19 14:57:46,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:46,132 INFO L93 Difference]: Finished difference Result 161 states and 473 transitions. [2021-11-19 14:57:46,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 14:57:46,133 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 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 12 [2021-11-19 14:57:46,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:46,136 INFO L225 Difference]: With dead ends: 161 [2021-11-19 14:57:46,136 INFO L226 Difference]: Without dead ends: 161 [2021-11-19 14:57:46,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:57:46,139 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 318 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:46,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 0 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:57:46,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-19 14:57:46,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-11-19 14:57:46,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.95625) internal successors, (473), 160 states have internal predecessors, (473), 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) [2021-11-19 14:57:46,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 473 transitions. [2021-11-19 14:57:46,162 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 473 transitions. Word has length 12 [2021-11-19 14:57:46,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:46,163 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 473 transitions. [2021-11-19 14:57:46,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 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) [2021-11-19 14:57:46,163 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 473 transitions. [2021-11-19 14:57:46,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-19 14:57:46,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:46,167 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:46,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:46,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:46,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:46,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:57:46,775 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 14:57:46,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:46,775 INFO L85 PathProgramCache]: Analyzing trace with hash 64462563, now seen corresponding path program 3 times [2021-11-19 14:57:46,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:46,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055421405] [2021-11-19 14:57:46,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:57:46,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:46,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:46,782 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:46,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:57:46,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-19 14:57:46,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:57:46,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:57:46,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:47,247 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:47,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:48,244 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:57:48,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055421405] [2021-11-19 14:57:48,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055421405] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:57:48,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1245372863] [2021-11-19 14:57:48,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:57:48,244 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:57:48,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:57:48,246 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:57:48,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-19 14:57:48,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-19 14:57:48,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:57:48,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:57:48,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:48,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:48,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1245372863] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:57:48,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971682959] [2021-11-19 14:57:48,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:57:48,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:57:48,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:57:48,754 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:57:48,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 14:57:48,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-19 14:57:48,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:57:48,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:57:48,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:48,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:49,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971682959] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:57:49,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:57:49,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16, 16, 16, 16] total 31 [2021-11-19 14:57:49,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286346561] [2021-11-19 14:57:49,133 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:57:49,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-19 14:57:49,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:57:49,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-19 14:57:49,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=719, Unknown=0, NotChecked=0, Total=992 [2021-11-19 14:57:49,136 INFO L87 Difference]: Start difference. First operand 161 states and 473 transitions. Second operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 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) [2021-11-19 14:57:52,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:52,642 INFO L93 Difference]: Finished difference Result 305 states and 914 transitions. [2021-11-19 14:57:52,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-19 14:57:52,645 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 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 20 [2021-11-19 14:57:52,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:52,650 INFO L225 Difference]: With dead ends: 305 [2021-11-19 14:57:52,650 INFO L226 Difference]: Without dead ends: 305 [2021-11-19 14:57:52,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=622, Invalid=1540, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 14:57:52,655 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1663 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1663 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:52,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1663 Valid, 0 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:57:52,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-19 14:57:52,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2021-11-19 14:57:52,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.0065789473684212) internal successors, (914), 304 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:52,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 914 transitions. [2021-11-19 14:57:52,714 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 914 transitions. Word has length 20 [2021-11-19 14:57:52,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:52,714 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 914 transitions. [2021-11-19 14:57:52,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 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) [2021-11-19 14:57:52,715 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 914 transitions. [2021-11-19 14:57:52,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 14:57:52,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:52,723 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:52,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:52,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:53,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:57:53,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:57:53,335 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 14:57:53,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:53,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1818977635, now seen corresponding path program 4 times [2021-11-19 14:57:53,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:53,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219607445] [2021-11-19 14:57:53,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:57:53,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:53,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:53,338 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:53,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:57:53,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:57:53,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:57:53,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-19 14:57:53,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:54,268 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:54,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:58,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:57:58,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219607445] [2021-11-19 14:57:58,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219607445] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:57:58,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2029139540] [2021-11-19 14:57:58,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:57:58,453 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:57:58,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:57:58,456 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:57:58,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 14:57:58,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:57:58,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:57:58,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-19 14:57:58,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:59,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:59,664 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:59,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2029139540] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:57:59,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021254998] [2021-11-19 14:57:59,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:57:59,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:57:59,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:57:59,670 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:57:59,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 14:57:59,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:57:59,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:57:59,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-19 14:57:59,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:58:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:58:00,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:58:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:58:00,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021254998] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:58:00,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:58:00,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 34 [2021-11-19 14:58:00,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289958112] [2021-11-19 14:58:00,641 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:58:00,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-19 14:58:00,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:58:00,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-19 14:58:00,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=940, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 14:58:00,643 INFO L87 Difference]: Start difference. First operand 305 states and 914 transitions. Second operand has 36 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 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) [2021-11-19 14:59:11,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:59:11,518 INFO L93 Difference]: Finished difference Result 2651 states and 7943 transitions. [2021-11-19 14:59:11,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-19 14:59:11,520 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 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 [2021-11-19 14:59:11,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:59:11,552 INFO L225 Difference]: With dead ends: 2651 [2021-11-19 14:59:11,552 INFO L226 Difference]: Without dead ends: 2651 [2021-11-19 14:59:11,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 75 SyntacticMatches, 17 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 55.6s TimeCoverageRelationStatistics Valid=1282, Invalid=2878, Unknown=0, NotChecked=0, Total=4160 [2021-11-19 14:59:11,555 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 784 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 2468 mSolverCounterSat, 580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 2468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:59:11,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [784 Valid, 0 Invalid, 3048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [580 Valid, 2468 Invalid, 0 Unknown, 0 Unchecked, 19.5s Time] [2021-11-19 14:59:11,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2021-11-19 14:59:11,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 819. [2021-11-19 14:59:11,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.10880195599022) internal successors, (2543), 818 states have internal predecessors, (2543), 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) [2021-11-19 14:59:11,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2543 transitions. [2021-11-19 14:59:11,646 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2543 transitions. Word has length 22 [2021-11-19 14:59:11,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:59:11,646 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 2543 transitions. [2021-11-19 14:59:11,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 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) [2021-11-19 14:59:11,647 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2543 transitions. [2021-11-19 14:59:11,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 14:59:11,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:11,651 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:59:11,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:59:11,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:59:12,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:59:12,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:59:12,256 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 14:59:12,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:12,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2108397107, now seen corresponding path program 1 times [2021-11-19 14:59:12,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:59:12,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [918644832] [2021-11-19 14:59:12,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:12,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:59:12,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:59:12,258 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:59:12,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:59:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:12,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-19 14:59:12,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:15,299 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:59:15,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:25,025 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:59:25,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:59:25,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [918644832] [2021-11-19 14:59:25,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [918644832] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:59:25,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1156377567] [2021-11-19 14:59:25,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:25,026 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:59:25,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:59:25,027 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:59:25,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-19 14:59:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:25,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-19 14:59:25,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:59:26,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:59:27,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1156377567] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:59:27,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195741269] [2021-11-19 14:59:27,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:27,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:59:27,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:59:27,067 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:59:27,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 14:59:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:27,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-19 14:59:27,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:59:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:59:28,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:59:28,608 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:59:28,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195741269] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:59:28,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:59:28,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 19, 19] total 38 [2021-11-19 14:59:28,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694039753] [2021-11-19 14:59:28,608 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:59:28,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-19 14:59:28,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:59:28,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-19 14:59:28,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2021-11-19 14:59:28,611 INFO L87 Difference]: Start difference. First operand 819 states and 2543 transitions. Second operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 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) [2021-11-19 15:01:17,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:01:17,830 INFO L93 Difference]: Finished difference Result 4682 states and 14092 transitions. [2021-11-19 15:01:17,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-19 15:01:17,833 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 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 25 [2021-11-19 15:01:17,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:01:17,877 INFO L225 Difference]: With dead ends: 4682 [2021-11-19 15:01:17,878 INFO L226 Difference]: Without dead ends: 4682 [2021-11-19 15:01:17,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 94 SyntacticMatches, 12 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 98.6s TimeCoverageRelationStatistics Valid=1495, Invalid=3907, Unknown=0, NotChecked=0, Total=5402 [2021-11-19 15:01:17,881 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1264 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 2734 mSolverCounterSat, 618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1264 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 618 IncrementalHoareTripleChecker+Valid, 2734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 542 IncrementalHoareTripleChecker+Unchecked, 22.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:01:17,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1264 Valid, 0 Invalid, 3894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [618 Valid, 2734 Invalid, 0 Unknown, 542 Unchecked, 22.1s Time] [2021-11-19 15:01:17,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4682 states. [2021-11-19 15:01:17,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4682 to 1077. [2021-11-19 15:01:17,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 3.1384758364312266) internal successors, (3377), 1076 states have internal predecessors, (3377), 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) [2021-11-19 15:01:17,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 3377 transitions. [2021-11-19 15:01:17,985 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 3377 transitions. Word has length 25 [2021-11-19 15:01:17,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:01:17,986 INFO L470 AbstractCegarLoop]: Abstraction has 1077 states and 3377 transitions. [2021-11-19 15:01:17,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 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) [2021-11-19 15:01:17,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 3377 transitions. [2021-11-19 15:01:17,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 15:01:17,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:17,990 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:01:18,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 15:01:18,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-19 15:01:18,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-19 15:01:18,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:01:18,608 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 15:01:18,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:18,609 INFO L85 PathProgramCache]: Analyzing trace with hash 586538459, now seen corresponding path program 2 times [2021-11-19 15:01:18,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:01:18,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106070105] [2021-11-19 15:01:18,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:01:18,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:01:18,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:01:18,611 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:01:18,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 15:01:18,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:01:18,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:01:18,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-19 15:01:18,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:20,215 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:01:20,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:01:28,132 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:01:28,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106070105] [2021-11-19 15:01:28,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106070105] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:01:28,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [159421161] [2021-11-19 15:01:28,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:01:28,133 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:01:28,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:01:28,134 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:01:28,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 15:01:28,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:01:28,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:01:28,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-19 15:01:28,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:01:29,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:01:29,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [159421161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:01:29,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564555709] [2021-11-19 15:01:29,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:01:29,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:01:29,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:01:29,992 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:01:29,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-19 15:01:30,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:01:30,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:01:30,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-19 15:01:30,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:01:31,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:01:31,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564555709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:01:31,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:01:31,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 19, 19] total 38 [2021-11-19 15:01:31,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102247816] [2021-11-19 15:01:31,967 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:01:31,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-19 15:01:31,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:01:31,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-19 15:01:31,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1178, Unknown=0, NotChecked=0, Total=1560 [2021-11-19 15:01:31,970 INFO L87 Difference]: Start difference. First operand 1077 states and 3377 transitions. Second operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 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) [2021-11-19 15:01:56,006 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 15:03:03,615 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 15:03:22,535 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 15:03:41,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:41,509 INFO L93 Difference]: Finished difference Result 5022 states and 15133 transitions. [2021-11-19 15:03:41,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-19 15:03:41,511 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 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 25 [2021-11-19 15:03:41,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:41,554 INFO L225 Difference]: With dead ends: 5022 [2021-11-19 15:03:41,554 INFO L226 Difference]: Without dead ends: 5022 [2021-11-19 15:03:41,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 88 SyntacticMatches, 19 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 104.2s TimeCoverageRelationStatistics Valid=1537, Invalid=4013, Unknown=0, NotChecked=0, Total=5550 [2021-11-19 15:03:41,557 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1044 mSDsluCounter, 1465 mSDsCounter, 0 mSdLazyCounter, 2744 mSolverCounterSat, 618 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1044 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 618 IncrementalHoareTripleChecker+Valid, 2744 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 425 IncrementalHoareTripleChecker+Unchecked, 34.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:41,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1044 Valid, 0 Invalid, 3790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [618 Valid, 2744 Invalid, 3 Unknown, 425 Unchecked, 34.3s Time] [2021-11-19 15:03:41,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5022 states. [2021-11-19 15:03:41,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5022 to 1205. [2021-11-19 15:03:41,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1204 states have (on average 3.1868770764119603) internal successors, (3837), 1204 states have internal predecessors, (3837), 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) [2021-11-19 15:03:41,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 3837 transitions. [2021-11-19 15:03:41,664 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 3837 transitions. Word has length 25 [2021-11-19 15:03:41,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:41,665 INFO L470 AbstractCegarLoop]: Abstraction has 1205 states and 3837 transitions. [2021-11-19 15:03:41,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 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) [2021-11-19 15:03:41,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 3837 transitions. [2021-11-19 15:03:41,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 15:03:41,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:41,669 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:03:41,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:41,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-19 15:03:42,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:42,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:03:42,284 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 15:03:42,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:42,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2006590193, now seen corresponding path program 3 times [2021-11-19 15:03:42,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:42,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810563713] [2021-11-19 15:03:42,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:03:42,285 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:42,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:42,285 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:42,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 15:03:42,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-19 15:03:42,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:03:42,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-19 15:03:42,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:03:46,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:03:55,870 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:55,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810563713] [2021-11-19 15:03:55,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810563713] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:03:55,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1605790173] [2021-11-19 15:03:55,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:03:55,871 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:03:55,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:03:55,872 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:03:55,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-19 15:03:56,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-19 15:03:56,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:03:56,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-19 15:03:56,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:03:57,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:03:57,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1605790173] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:03:57,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729316328] [2021-11-19 15:03:57,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:03:57,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:03:57,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:03:57,910 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:03:57,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-19 15:03:58,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-19 15:03:58,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:03:58,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-19 15:03:58,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:58,912 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:03:58,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:59,358 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:03:59,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729316328] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:03:59,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:03:59,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 19, 19] total 38 [2021-11-19 15:03:59,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363544603] [2021-11-19 15:03:59,359 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:03:59,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-19 15:03:59,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:59,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-19 15:03:59,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1176, Unknown=0, NotChecked=0, Total=1560 [2021-11-19 15:03:59,361 INFO L87 Difference]: Start difference. First operand 1205 states and 3837 transitions. Second operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 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) [2021-11-19 15:04:24,276 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 15:05:06,290 WARN L227 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:05:43,177 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 15:05:59,090 WARN L227 SmtUtils]: Spent 5.58s on a formula simplification that was a NOOP. DAG size: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:06:03,608 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 15:06:28,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:06:28,875 INFO L93 Difference]: Finished difference Result 5053 states and 15284 transitions. [2021-11-19 15:06:28,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-19 15:06:28,884 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 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 25 [2021-11-19 15:06:28,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:06:28,939 INFO L225 Difference]: With dead ends: 5053 [2021-11-19 15:06:28,939 INFO L226 Difference]: Without dead ends: 5053 [2021-11-19 15:06:28,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 124.6s TimeCoverageRelationStatistics Valid=1585, Invalid=4115, Unknown=0, NotChecked=0, Total=5700 [2021-11-19 15:06:28,943 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1059 mSDsluCounter, 1692 mSDsCounter, 0 mSdLazyCounter, 3031 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 3031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 545 IncrementalHoareTripleChecker+Unchecked, 37.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:06:28,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1059 Valid, 0 Invalid, 4196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 3031 Invalid, 0 Unknown, 545 Unchecked, 37.3s Time] [2021-11-19 15:06:28,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5053 states. [2021-11-19 15:06:29,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5053 to 1328. [2021-11-19 15:06:29,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 3.229841748304446) internal successors, (4286), 1327 states have internal predecessors, (4286), 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) [2021-11-19 15:06:29,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 4286 transitions. [2021-11-19 15:06:29,074 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 4286 transitions. Word has length 25 [2021-11-19 15:06:29,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:06:29,075 INFO L470 AbstractCegarLoop]: Abstraction has 1328 states and 4286 transitions. [2021-11-19 15:06:29,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 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) [2021-11-19 15:06:29,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 4286 transitions. [2021-11-19 15:06:29,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 15:06:29,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:06:29,080 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:06:29,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-19 15:06:29,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-19 15:06:29,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 15:06:29,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:06:29,684 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-19 15:06:29,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:06:29,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1511991131, now seen corresponding path program 4 times [2021-11-19 15:06:29,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:06:29,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [634978188] [2021-11-19 15:06:29,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 15:06:29,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:06:29,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:06:29,687 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:06:29,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 15:06:29,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 15:06:29,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:06:29,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-19 15:06:29,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:06:31,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:38,021 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:06:38,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:06:38,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [634978188] [2021-11-19 15:06:38,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [634978188] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:06:38,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [525297944] [2021-11-19 15:06:38,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 15:06:38,022 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:06:38,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:06:38,023 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:06:38,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-19 15:06:38,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 15:06:38,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:06:38,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-19 15:06:38,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:38,957 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:06:38,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:06:39,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [525297944] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:06:39,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441082510] [2021-11-19 15:06:39,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 15:06:39,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:06:39,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:06:39,482 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:06:39,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63a89afa-6e70-4f36-a5ad-993e1b869d65/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-19 15:06:39,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 15:06:39,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:06:39,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-19 15:06:39,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:06:40,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:06:41,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441082510] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:06:41,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:06:41,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 19, 19] total 38 [2021-11-19 15:06:41,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686994748] [2021-11-19 15:06:41,065 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:06:41,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-19 15:06:41,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:06:41,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-19 15:06:41,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2021-11-19 15:06:41,068 INFO L87 Difference]: Start difference. First operand 1328 states and 4286 transitions. Second operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 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) [2021-11-19 15:07:02,725 WARN L227 SmtUtils]: Spent 6.31s on a formula simplification that was a NOOP. DAG size: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:08:10,753 WARN L227 SmtUtils]: Spent 5.46s on a formula simplification that was a NOOP. DAG size: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:08:21,174 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 15:08:36,314 WARN L227 SmtUtils]: Spent 5.45s on a formula simplification that was a NOOP. DAG size: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)