./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/pipeline.cil-1.c --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_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/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_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/pipeline.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/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_8fcd6601-c9fb-4943-8518-0a372eddb3b1/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 79bbe68806c3ba3852cd8c209d4ce80dca551636a131cc65daaf97524d927c63 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:47:58,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:47:58,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:47:58,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:47:58,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:47:58,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:47:58,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:47:58,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:47:58,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:47:58,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:47:58,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:47:58,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:47:58,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:47:58,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:47:58,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:47:58,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:47:58,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:47:58,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:47:58,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:47:58,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:47:58,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:47:58,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:47:58,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:47:58,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:47:58,560 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:47:58,560 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:47:58,561 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:47:58,562 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:47:58,563 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:47:58,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:47:58,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:47:58,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:47:58,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:47:58,569 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:47:58,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:47:58,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:47:58,573 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:47:58,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:47:58,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:47:58,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:47:58,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:47:58,584 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 15:47:58,647 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:47:58,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:47:58,649 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:47:58,649 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:47:58,650 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:47:58,650 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:47:58,650 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:47:58,651 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:47:58,651 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:47:58,651 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:47:58,653 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:47:58,653 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:47:58,653 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:47:58,654 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:47:58,654 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:47:58,654 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:47:58,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:47:58,656 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:47:58,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:47:58,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:47:58,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:47:58,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:47:58,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:47:58,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:47:58,658 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:47:58,658 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:47:58,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:47:58,658 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:47:58,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:47:58,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:47:58,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:47:58,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:47:58,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:47:58,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:47:58,663 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:47:58,663 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:47:58,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:47:58,663 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:47:58,664 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:47:58,664 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:47:58,664 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_8fcd6601-c9fb-4943-8518-0a372eddb3b1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79bbe68806c3ba3852cd8c209d4ce80dca551636a131cc65daaf97524d927c63 [2021-11-19 15:47:59,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:47:59,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:47:59,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:47:59,083 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:47:59,084 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:47:59,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/systemc/pipeline.cil-1.c [2021-11-19 15:47:59,187 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/data/e5e38d055/d625025a47844881ad4e64d0652ec24a/FLAG800218d13 [2021-11-19 15:47:59,808 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:47:59,809 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/sv-benchmarks/c/systemc/pipeline.cil-1.c [2021-11-19 15:47:59,830 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/data/e5e38d055/d625025a47844881ad4e64d0652ec24a/FLAG800218d13 [2021-11-19 15:48:00,081 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/data/e5e38d055/d625025a47844881ad4e64d0652ec24a [2021-11-19 15:48:00,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:48:00,086 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:48:00,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:48:00,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:48:00,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:48:00,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:48:00" (1/1) ... [2021-11-19 15:48:00,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28de304f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:00, skipping insertion in model container [2021-11-19 15:48:00,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:48:00" (1/1) ... [2021-11-19 15:48:00,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:48:00,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:48:00,457 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_8fcd6601-c9fb-4943-8518-0a372eddb3b1/sv-benchmarks/c/systemc/pipeline.cil-1.c[640,653] [2021-11-19 15:48:00,540 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:48:00,552 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:48:00,566 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_8fcd6601-c9fb-4943-8518-0a372eddb3b1/sv-benchmarks/c/systemc/pipeline.cil-1.c[640,653] [2021-11-19 15:48:00,616 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:48:00,636 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:48:00,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:00 WrapperNode [2021-11-19 15:48:00,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:48:00,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:48:00,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:48:00,639 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:48:00,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:00" (1/1) ... [2021-11-19 15:48:00,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:00" (1/1) ... [2021-11-19 15:48:00,727 INFO L137 Inliner]: procedures = 20, calls = 17, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 422 [2021-11-19 15:48:00,739 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:48:00,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:48:00,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:48:00,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:48:00,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:00" (1/1) ... [2021-11-19 15:48:00,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:00" (1/1) ... [2021-11-19 15:48:00,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:00" (1/1) ... [2021-11-19 15:48:00,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:00" (1/1) ... [2021-11-19 15:48:00,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:00" (1/1) ... [2021-11-19 15:48:00,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:00" (1/1) ... [2021-11-19 15:48:00,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:00" (1/1) ... [2021-11-19 15:48:00,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:48:00,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:48:00,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:48:00,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:48:00,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:00" (1/1) ... [2021-11-19 15:48:00,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:48:00,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:48:00,868 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:48:00,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:48:00,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:48:00,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 15:48:00,922 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2021-11-19 15:48:00,922 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2021-11-19 15:48:00,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:48:00,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:48:01,099 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:48:01,101 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:48:01,731 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:48:02,267 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:48:02,268 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-19 15:48:02,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:48:02 BoogieIcfgContainer [2021-11-19 15:48:02,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:48:02,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:48:02,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:48:02,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:48:02,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:48:00" (1/3) ... [2021-11-19 15:48:02,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c0e66b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:48:02, skipping insertion in model container [2021-11-19 15:48:02,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:48:00" (2/3) ... [2021-11-19 15:48:02,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c0e66b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:48:02, skipping insertion in model container [2021-11-19 15:48:02,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:48:02" (3/3) ... [2021-11-19 15:48:02,283 INFO L111 eAbstractionObserver]: Analyzing ICFG pipeline.cil-1.c [2021-11-19 15:48:02,290 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:48:02,291 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:48:02,393 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:48:02,406 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 15:48:02,406 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 15:48:02,447 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 15:48:02,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-19 15:48:02,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:02,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:02,457 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:02,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:02,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1030469667, now seen corresponding path program 1 times [2021-11-19 15:48:02,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:02,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967235459] [2021-11-19 15:48:02,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:02,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:48:02,832 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:02,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967235459] [2021-11-19 15:48:02,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967235459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:02,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529115726] [2021-11-19 15:48:02,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:02,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:48:02,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:48:02,846 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:48:02,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 15:48:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:03,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 15:48:03,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:48:03,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:03,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:48:03,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529115726] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:03,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:48:03,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 2 [2021-11-19 15:48:03,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659362896] [2021-11-19 15:48:03,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:03,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 15:48:03,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:03,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 15:48:03,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 15:48:03,248 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 15:48:03,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:03,307 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-11-19 15:48:03,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 15:48:03,311 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-11-19 15:48:03,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:03,322 INFO L225 Difference]: With dead ends: 57 [2021-11-19 15:48:03,322 INFO L226 Difference]: Without dead ends: 29 [2021-11-19 15:48:03,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 15:48:03,331 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:03,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:48:03,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-19 15:48:03,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-19 15:48:03,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 15:48:03,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 42 transitions. [2021-11-19 15:48:03,381 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 42 transitions. Word has length 16 [2021-11-19 15:48:03,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:03,382 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 42 transitions. [2021-11-19 15:48:03,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 15:48:03,383 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 42 transitions. [2021-11-19 15:48:03,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-19 15:48:03,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:03,386 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:03,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:03,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-19 15:48:03,613 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:03,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:03,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1095063889, now seen corresponding path program 1 times [2021-11-19 15:48:03,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:03,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266319197] [2021-11-19 15:48:03,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:03,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:48:04,293 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:04,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266319197] [2021-11-19 15:48:04,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266319197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:04,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180349872] [2021-11-19 15:48:04,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:04,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:48:04,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:48:04,295 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:48:04,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 15:48:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:04,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:48:04,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 15:48:04,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 15:48:04,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180349872] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:04,857 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:04,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [10] total 15 [2021-11-19 15:48:04,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073608691] [2021-11-19 15:48:04,858 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:04,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:48:04,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:48:04,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:48:04,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-19 15:48:04,871 INFO L87 Difference]: Start difference. First operand 29 states and 42 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 15:48:05,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:05,038 INFO L93 Difference]: Finished difference Result 79 states and 115 transitions. [2021-11-19 15:48:05,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:48:05,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2021-11-19 15:48:05,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:05,045 INFO L225 Difference]: With dead ends: 79 [2021-11-19 15:48:05,046 INFO L226 Difference]: Without dead ends: 52 [2021-11-19 15:48:05,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-19 15:48:05,051 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 13 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:05,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 141 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:48:05,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-19 15:48:05,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2021-11-19 15:48:05,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 37 states have internal predecessors, (48), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-19 15:48:05,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 66 transitions. [2021-11-19 15:48:05,083 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 66 transitions. Word has length 40 [2021-11-19 15:48:05,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:05,084 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 66 transitions. [2021-11-19 15:48:05,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 15:48:05,085 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 66 transitions. [2021-11-19 15:48:05,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-19 15:48:05,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:05,100 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:05,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:05,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:48:05,321 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:05,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:05,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1731724527, now seen corresponding path program 1 times [2021-11-19 15:48:05,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:48:05,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527421324] [2021-11-19 15:48:05,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:05,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:48:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 6 proven. 207 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-19 15:48:06,046 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:48:06,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527421324] [2021-11-19 15:48:06,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527421324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:06,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423269571] [2021-11-19 15:48:06,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:06,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:48:06,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:48:06,053 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:48:06,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fcd6601-c9fb-4943-8518-0a372eddb3b1/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 15:48:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:06,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 2137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:48:06,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2021-11-19 15:48:07,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2021-11-19 15:48:07,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423269571] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:48:07,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [249412499] [2021-11-19 15:48:07,469 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-19 15:48:07,469 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 15:48:07,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 15:48:07,482 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 15:48:07,483 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 15:48:07,604 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:07,668 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 311 [2021-11-19 15:48:07,756 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:07,771 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:07,773 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:07,783 INFO L185 QuantifierPusher]: treesize reduction 16, result has 20.0 percent of original size 4 [2021-11-19 15:48:07,785 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:07,793 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:07,808 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-19 15:48:07,829 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:07,831 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:07,833 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:07,835 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:07,843 INFO L185 QuantifierPusher]: treesize reduction 16, result has 20.0 percent of original size 4 [2021-11-19 15:48:07,853 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-11-19 15:48:07,860 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:07,862 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:07,869 INFO L185 QuantifierPusher]: treesize reduction 16, result has 20.0 percent of original size 4 [2021-11-19 15:48:07,871 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:07,874 INFO L180 QuantifierPusher]: treesize reduction 16, result has 57.9 percent of original size [2021-11-19 15:48:07,878 INFO L185 QuantifierPusher]: treesize reduction 4, result has 69.2 percent of original size 9 [2021-11-19 15:48:07,879 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:07,880 INFO L180 QuantifierPusher]: treesize reduction 4, result has 84.6 percent of original size [2021-11-19 15:48:07,885 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-19 15:48:07,891 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:07,893 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:07,895 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:07,900 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:07,905 INFO L185 QuantifierPusher]: treesize reduction 16, result has 20.0 percent of original size 4 [2021-11-19 15:48:07,914 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-11-19 15:48:07,924 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:07,926 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:07,933 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 15:48:07,934 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:07,935 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:07,945 INFO L185 QuantifierPusher]: treesize reduction 16, result has 20.0 percent of original size 4 [2021-11-19 15:48:07,976 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:07,981 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:07,986 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-19 15:48:07,997 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:08,000 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:08,010 INFO L185 QuantifierPusher]: treesize reduction 38, result has 9.5 percent of original size 4 [2021-11-19 15:48:08,014 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:08,018 INFO L180 QuantifierPusher]: treesize reduction 38, result has 50.6 percent of original size [2021-11-19 15:48:08,024 INFO L185 QuantifierPusher]: treesize reduction 4, result has 81.8 percent of original size 18 [2021-11-19 15:48:08,028 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:08,029 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:08,036 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-19 15:48:08,038 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:08,039 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:08,044 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-19 15:48:08,047 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:08,048 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:08,050 INFO L185 QuantifierPusher]: treesize reduction 4, result has 50.0 percent of original size 4 [2021-11-19 15:48:08,052 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:08,054 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:08,054 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:08,055 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:08,058 INFO L185 QuantifierPusher]: treesize reduction 4, result has 50.0 percent of original size 4 [2021-11-19 15:48:08,064 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-19 15:48:08,070 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:08,071 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:08,076 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-19 15:48:08,078 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:08,082 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:08,087 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-19 15:48:08,088 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:08,089 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:08,100 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-11-19 15:48:08,100 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:08,110 INFO L180 QuantifierPusher]: treesize reduction 4, result has 98.3 percent of original size [2021-11-19 15:48:08,147 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 304 [2021-11-19 15:48:08,149 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:08,151 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:08,157 INFO L185 QuantifierPusher]: treesize reduction 16, result has 20.0 percent of original size 4 [2021-11-19 15:48:08,157 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:08,159 INFO L180 QuantifierPusher]: treesize reduction 16, result has 57.9 percent of original size [2021-11-19 15:48:08,161 INFO L185 QuantifierPusher]: treesize reduction 4, result has 69.2 percent of original size 9 [2021-11-19 15:48:08,161 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:08,163 INFO L180 QuantifierPusher]: treesize reduction 4, result has 84.6 percent of original size [2021-11-19 15:48:08,167 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-11-19 15:48:08,168 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:08,169 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:08,174 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 15:48:08,176 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 15:48:08,177 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:48:08,185 INFO L185 QuantifierPusher]: treesize reduction 16, result has 20.0 percent of original size 4 [2021-11-19 15:48:08,209 INFO L185 QuantifierPusher]: treesize reduction 8, result has 98.5 percent of original size 512 [2021-11-19 15:48:08,548 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2021-11-19 15:48:09,057 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 32768 conjuctions. This might take some time... [2021-11-19 15:52:02,549 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 32768 conjuctions. [2021-11-19 15:52:04,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 15:52:04,264 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2021-11-19 15:52:04,916 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 32768 conjuctions. This might take some time... [2021-11-19 15:54:55,053 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 32768 conjuctions. [2021-11-19 15:55:04,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms