./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gsv2008.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-lit/gsv2008.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl --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 d7b840784ed09a8ba534cc1991a3b26e3517ca5684a3a750b52e1a997eff0418 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:15:50,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:15:50,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:15:50,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:15:50,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:15:50,656 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:15:50,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:15:50,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:15:50,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:15:50,664 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:15:50,665 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:15:50,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:15:50,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:15:50,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:15:50,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:15:50,673 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:15:50,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:15:50,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:15:50,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:15:50,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:15:50,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:15:50,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:15:50,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:15:50,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:15:50,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:15:50,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:15:50,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:15:50,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:15:50,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:15:50,694 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:15:50,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:15:50,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:15:50,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:15:50,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:15:50,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:15:50,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:15:50,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:15:50,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:15:50,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:15:50,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:15:50,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:15:50,704 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:15:50,740 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:15:50,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:15:50,743 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:15:50,743 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:15:50,744 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:15:50,744 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:15:50,744 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:15:50,745 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:15:50,745 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:15:50,745 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:15:50,746 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:15:50,747 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:15:50,747 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:15:50,747 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:15:50,747 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:15:50,747 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:15:50,748 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:15:50,748 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:15:50,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:15:50,750 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:15:50,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:15:50,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:15:50,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:15:50,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:15:50,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:15:50,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:15:50,753 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:15:50,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:15:50,753 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:15:50,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:15:50,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:15:50,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:15:50,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:15:50,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:15:50,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:15:50,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:15:50,756 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:15:50,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:15:50,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:15:50,756 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:15:50,756 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:15:50,757 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_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7b840784ed09a8ba534cc1991a3b26e3517ca5684a3a750b52e1a997eff0418 [2021-11-23 17:15:51,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:15:51,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:15:51,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:15:51,105 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:15:51,105 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:15:51,107 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/loop-lit/gsv2008.i [2021-11-23 17:15:51,173 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/data/bcb5ecc8e/1ce4fe8278fe4dd39b2075cb383a848d/FLAG4d8801c93 [2021-11-23 17:15:51,696 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:15:51,697 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/sv-benchmarks/c/loop-lit/gsv2008.i [2021-11-23 17:15:51,710 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/data/bcb5ecc8e/1ce4fe8278fe4dd39b2075cb383a848d/FLAG4d8801c93 [2021-11-23 17:15:52,039 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/data/bcb5ecc8e/1ce4fe8278fe4dd39b2075cb383a848d [2021-11-23 17:15:52,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:15:52,046 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:15:52,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:15:52,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:15:52,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:15:52,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@105781f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52, skipping insertion in model container [2021-11-23 17:15:52,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:15:52,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:15:52,294 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_84b99dff-0f35-4b8f-bda2-5458cc443226/sv-benchmarks/c/loop-lit/gsv2008.i[895,908] [2021-11-23 17:15:52,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:15:52,320 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:15:52,336 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_84b99dff-0f35-4b8f-bda2-5458cc443226/sv-benchmarks/c/loop-lit/gsv2008.i[895,908] [2021-11-23 17:15:52,341 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:15:52,361 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:15:52,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52 WrapperNode [2021-11-23 17:15:52,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:15:52,363 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:15:52,363 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:15:52,363 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:15:52,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,398 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 35 [2021-11-23 17:15:52,398 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:15:52,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:15:52,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:15:52,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:15:52,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:15:52,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:15:52,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:15:52,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:15:52,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:52" (1/1) ... [2021-11-23 17:15:52,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:15:52,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:15:52,458 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:15:52,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:15:52,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:15:52,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:15:52,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:15:52,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:15:52,550 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:15:52,551 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:15:52,657 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:15:52,671 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$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) [2021-11-23 17:15:52,675 INFO L158 Benchmark]: Toolchain (without parser) took 628.15ms. Allocated memory is still 117.4MB. Free memory was 81.0MB in the beginning and 82.1MB in the end (delta: -1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:15:52,676 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 117.4MB. Free memory was 97.3MB in the beginning and 97.3MB in the end (delta: 73.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:15:52,678 INFO L158 Benchmark]: CACSL2BoogieTranslator took 312.27ms. Allocated memory is still 117.4MB. Free memory was 80.8MB in the beginning and 93.7MB in the end (delta: -12.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:15:52,679 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.97ms. Allocated memory is still 117.4MB. Free memory was 93.7MB in the beginning and 92.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:15:52,680 INFO L158 Benchmark]: Boogie Preprocessor took 26.46ms. Allocated memory is still 117.4MB. Free memory was 92.4MB in the beginning and 91.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:15:52,680 INFO L158 Benchmark]: RCFGBuilder took 246.76ms. Allocated memory is still 117.4MB. Free memory was 91.3MB in the beginning and 82.1MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:15:52,684 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 117.4MB. Free memory was 97.3MB in the beginning and 97.3MB in the end (delta: 73.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 312.27ms. Allocated memory is still 117.4MB. Free memory was 80.8MB in the beginning and 93.7MB in the end (delta: -12.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.97ms. Allocated memory is still 117.4MB. Free memory was 93.7MB in the beginning and 92.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.46ms. Allocated memory is still 117.4MB. Free memory was 92.4MB in the beginning and 91.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 246.76ms. Allocated memory is still 117.4MB. Free memory was 91.3MB in the beginning and 82.1MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:15:52,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 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_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-lit/gsv2008.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl --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 d7b840784ed09a8ba534cc1991a3b26e3517ca5684a3a750b52e1a997eff0418 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:15:55,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:15:55,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:15:55,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:15:55,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:15:55,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:15:55,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:15:55,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:15:55,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:15:55,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:15:55,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:15:55,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:15:55,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:15:55,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:15:55,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:15:55,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:15:55,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:15:55,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:15:55,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:15:55,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:15:55,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:15:55,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:15:55,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:15:55,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:15:55,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:15:55,366 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:15:55,366 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:15:55,368 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:15:55,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:15:55,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:15:55,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:15:55,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:15:55,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:15:55,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:15:55,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:15:55,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:15:55,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:15:55,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:15:55,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:15:55,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:15:55,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:15:55,386 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:15:55,433 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:15:55,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:15:55,435 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:15:55,435 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:15:55,436 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:15:55,436 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:15:55,436 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:15:55,437 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:15:55,437 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:15:55,437 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:15:55,438 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:15:55,439 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:15:55,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:15:55,441 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:15:55,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:15:55,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:15:55,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:15:55,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:15:55,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:15:55,442 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:15:55,442 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:15:55,443 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:15:55,443 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:15:55,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:15:55,443 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:15:55,443 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:15:55,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:15:55,444 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:15:55,444 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:15:55,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:15:55,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:15:55,445 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:15:55,445 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:15:55,446 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:15:55,446 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:15:55,446 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:15:55,446 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:15:55,447 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:15:55,447 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_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7b840784ed09a8ba534cc1991a3b26e3517ca5684a3a750b52e1a997eff0418 [2021-11-23 17:15:55,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:15:55,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:15:55,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:15:55,872 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:15:55,873 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:15:55,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/loop-lit/gsv2008.i [2021-11-23 17:15:55,958 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/data/0aee77c07/8ad303e3a97a492089d1da56bf240d50/FLAGf64534ac4 [2021-11-23 17:15:56,514 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:15:56,515 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/sv-benchmarks/c/loop-lit/gsv2008.i [2021-11-23 17:15:56,522 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/data/0aee77c07/8ad303e3a97a492089d1da56bf240d50/FLAGf64534ac4 [2021-11-23 17:15:56,887 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/data/0aee77c07/8ad303e3a97a492089d1da56bf240d50 [2021-11-23 17:15:56,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:15:56,894 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:15:56,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:15:56,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:15:56,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:15:56,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:15:56" (1/1) ... [2021-11-23 17:15:56,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@796ee621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:56, skipping insertion in model container [2021-11-23 17:15:56,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:15:56" (1/1) ... [2021-11-23 17:15:56,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:15:56,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:15:57,064 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_84b99dff-0f35-4b8f-bda2-5458cc443226/sv-benchmarks/c/loop-lit/gsv2008.i[895,908] [2021-11-23 17:15:57,074 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:15:57,086 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:15:57,120 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_84b99dff-0f35-4b8f-bda2-5458cc443226/sv-benchmarks/c/loop-lit/gsv2008.i[895,908] [2021-11-23 17:15:57,139 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:15:57,152 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:15:57,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57 WrapperNode [2021-11-23 17:15:57,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:15:57,156 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:15:57,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:15:57,156 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:15:57,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57" (1/1) ... [2021-11-23 17:15:57,171 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57" (1/1) ... [2021-11-23 17:15:57,192 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-11-23 17:15:57,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:15:57,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:15:57,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:15:57,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:15:57,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57" (1/1) ... [2021-11-23 17:15:57,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57" (1/1) ... [2021-11-23 17:15:57,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57" (1/1) ... [2021-11-23 17:15:57,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57" (1/1) ... [2021-11-23 17:15:57,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57" (1/1) ... [2021-11-23 17:15:57,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57" (1/1) ... [2021-11-23 17:15:57,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57" (1/1) ... [2021-11-23 17:15:57,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:15:57,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:15:57,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:15:57,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:15:57,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57" (1/1) ... [2021-11-23 17:15:57,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:15:57,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:15:57,279 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:15:57,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:15:57,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:15:57,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:15:57,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:15:57,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:15:57,400 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:15:57,402 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:15:57,537 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:15:57,543 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:15:57,543 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:15:57,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:15:57 BoogieIcfgContainer [2021-11-23 17:15:57,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:15:57,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:15:57,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:15:57,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:15:57,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:15:56" (1/3) ... [2021-11-23 17:15:57,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6689a3ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:15:57, skipping insertion in model container [2021-11-23 17:15:57,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:15:57" (2/3) ... [2021-11-23 17:15:57,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6689a3ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:15:57, skipping insertion in model container [2021-11-23 17:15:57,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:15:57" (3/3) ... [2021-11-23 17:15:57,569 INFO L111 eAbstractionObserver]: Analyzing ICFG gsv2008.i [2021-11-23 17:15:57,574 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:15:57,575 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:15:57,632 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:15:57,639 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 [2021-11-23 17:15:57,639 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:15:57,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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) [2021-11-23 17:15:57,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 17:15:57,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:57,659 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:15:57,660 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:57,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:57,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1807089480, now seen corresponding path program 1 times [2021-11-23 17:15:57,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:57,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802360549] [2021-11-23 17:15:57,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:57,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:57,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:57,698 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:57,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:15:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:57,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 17:15:57,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:15:57,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:57,845 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:57,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802360549] [2021-11-23 17:15:57,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802360549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:57,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:57,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:15:57,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313012984] [2021-11-23 17:15:57,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:57,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 17:15:57,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:57,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 17:15:57,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:15:57,882 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-23 17:15:57,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:57,895 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-11-23 17:15:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 17:15:57,898 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 [2021-11-23 17:15:57,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:57,916 INFO L225 Difference]: With dead ends: 20 [2021-11-23 17:15:57,917 INFO L226 Difference]: Without dead ends: 8 [2021-11-23 17:15:57,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:15:57,923 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:57,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:57,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-23 17:15:57,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-23 17:15:57,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2021-11-23 17:15:57,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-23 17:15:57,973 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 7 [2021-11-23 17:15:57,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:57,974 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-23 17:15:57,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-23 17:15:57,975 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-23 17:15:57,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 17:15:57,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:57,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:15:57,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:58,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:58,187 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:58,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:58,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1806970316, now seen corresponding path program 1 times [2021-11-23 17:15:58,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:58,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767121294] [2021-11-23 17:15:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:58,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:58,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:58,193 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:58,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:15:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:58,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:15:58,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:15:58,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:58,339 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:58,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767121294] [2021-11-23 17:15:58,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767121294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:58,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:58,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:15:58,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019584215] [2021-11-23 17:15:58,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:58,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:15:58,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:58,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:15:58,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:15:58,343 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-11-23 17:15:58,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:58,356 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-11-23 17:15:58,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:15:58,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 [2021-11-23 17:15:58,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:58,361 INFO L225 Difference]: With dead ends: 13 [2021-11-23 17:15:58,361 INFO L226 Difference]: Without dead ends: 9 [2021-11-23 17:15:58,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:15:58,364 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:58,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:15:58,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-23 17:15:58,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-23 17:15:58,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2021-11-23 17:15:58,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-23 17:15:58,381 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-11-23 17:15:58,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:58,382 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-23 17:15:58,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-11-23 17:15:58,383 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-23 17:15:58,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 17:15:58,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:58,384 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:15:58,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:15:58,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:58,595 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:58,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:58,596 INFO L85 PathProgramCache]: Analyzing trace with hash 183170324, now seen corresponding path program 1 times [2021-11-23 17:15:58,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:58,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973872414] [2021-11-23 17:15:58,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:58,599 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:58,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:58,600 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:58,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:15:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:58,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:15:58,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:15:59,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:15:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:15:59,288 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:59,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973872414] [2021-11-23 17:15:59,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973872414] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:15:59,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [770911025] [2021-11-23 17:15:59,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:59,292 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:15:59,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:15:59,299 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:15:59,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 17:15:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:59,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:15:59,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:15:59,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:15:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:15:59,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [770911025] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:15:59,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400630498] [2021-11-23 17:15:59,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:59,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:15:59,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:15:59,644 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:15:59,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 17:15:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:59,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:15:59,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:15:59,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:00,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400630498] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:00,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:16:00,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 14 [2021-11-23 17:16:00,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125670347] [2021-11-23 17:16:00,003 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:16:00,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 17:16:00,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:00,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 17:16:00,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:16:00,007 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2021-11-23 17:16:00,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:00,517 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-11-23 17:16:00,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 17:16:00,519 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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 [2021-11-23 17:16:00,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:00,519 INFO L225 Difference]: With dead ends: 20 [2021-11-23 17:16:00,519 INFO L226 Difference]: Without dead ends: 12 [2021-11-23 17:16:00,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-11-23 17:16:00,522 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:00,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 37 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 40 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2021-11-23 17:16:00,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-23 17:16:00,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-23 17:16:00,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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) [2021-11-23 17:16:00,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-11-23 17:16:00,526 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2021-11-23 17:16:00,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:00,526 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-11-23 17:16:00,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2021-11-23 17:16:00,526 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-11-23 17:16:00,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 17:16:00,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:00,527 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:00,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:00,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-23 17:16:00,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 17:16:01,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:01,131 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:01,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:01,132 INFO L85 PathProgramCache]: Analyzing trace with hash -422592564, now seen corresponding path program 2 times [2021-11-23 17:16:01,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:01,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1714179578] [2021-11-23 17:16:01,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:16:01,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:01,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:01,153 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:01,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:16:01,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:01,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:16:01,197 WARN L261 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 17:16:01,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:01,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:02,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:02,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1714179578] [2021-11-23 17:16:02,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1714179578] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:02,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [90173189] [2021-11-23 17:16:02,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:16:02,861 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:02,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:02,879 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:02,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 17:16:02,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:16:02,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:02,956 WARN L261 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:16:02,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:04,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:05,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [90173189] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:05,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471412464] [2021-11-23 17:16:05,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:16:05,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:05,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:05,178 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:05,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 17:16:05,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:16:05,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:05,234 WARN L261 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 17:16:05,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:05,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:06,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471412464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:06,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:16:06,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 24 [2021-11-23 17:16:06,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549793436] [2021-11-23 17:16:06,646 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:16:06,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 17:16:06,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:06,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 17:16:06,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-11-23 17:16:06,648 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 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) [2021-11-23 17:16:10,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:10,284 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-11-23 17:16:10,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 17:16:10,286 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 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 11 [2021-11-23 17:16:10,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:10,287 INFO L225 Difference]: With dead ends: 30 [2021-11-23 17:16:10,287 INFO L226 Difference]: Without dead ends: 18 [2021-11-23 17:16:10,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 17:16:10,289 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 62 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:10,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 43 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 91 Invalid, 0 Unknown, 12 Unchecked, 0.4s Time] [2021-11-23 17:16:10,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-23 17:16:10,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-23 17:16:10,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 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) [2021-11-23 17:16:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-11-23 17:16:10,295 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2021-11-23 17:16:10,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:10,295 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-11-23 17:16:10,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 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) [2021-11-23 17:16:10,296 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-11-23 17:16:10,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 17:16:10,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:10,297 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:16:10,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:10,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:10,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:16:10,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:10,909 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:10,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:10,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1035090636, now seen corresponding path program 3 times [2021-11-23 17:16:10,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:10,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1027908012] [2021-11-23 17:16:10,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:16:10,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:10,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:10,912 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:10,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:16:10,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 17:16:10,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:10,976 WARN L261 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-23 17:16:10,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:12,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:19,229 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:19,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1027908012] [2021-11-23 17:16:19,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1027908012] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:19,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1784464740] [2021-11-23 17:16:19,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:16:19,230 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:19,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:19,235 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:19,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 17:16:19,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 17:16:19,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:19,337 WARN L261 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 17:16:19,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:22,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:26,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1784464740] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:26,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560921433] [2021-11-23 17:16:26,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:16:26,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:26,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:26,022 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:26,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 17:16:26,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 17:16:26,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:16:26,095 WARN L261 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 17:16:26,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:27,602 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:27,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:31,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560921433] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:31,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:16:31,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16, 16, 16, 16] total 37 [2021-11-23 17:16:31,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666608298] [2021-11-23 17:16:31,092 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:16:31,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 17:16:31,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:31,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 17:16:31,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 17:16:31,095 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 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) [2021-11-23 17:16:39,826 WARN L227 SmtUtils]: Spent 6.32s on a formula simplification. DAG size of input: 91 DAG size of output: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:17:14,844 WARN L227 SmtUtils]: Spent 8.31s on a formula simplification. DAG size of input: 89 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:17:15,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:15,001 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-11-23 17:17:15,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 17:17:15,005 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 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 17 [2021-11-23 17:17:15,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:15,006 INFO L225 Difference]: With dead ends: 36 [2021-11-23 17:17:15,007 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 17:17:15,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 51 SyntacticMatches, 10 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 55.1s TimeCoverageRelationStatistics Valid=789, Invalid=1863, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 17:17:15,010 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 117 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:15,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 47 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 276 Invalid, 0 Unknown, 18 Unchecked, 2.2s Time] [2021-11-23 17:17:15,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 17:17:15,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-23 17:17:15,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 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) [2021-11-23 17:17:15,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-11-23 17:17:15,022 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 17 [2021-11-23 17:17:15,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:15,023 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-11-23 17:17:15,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 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) [2021-11-23 17:17:15,023 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-11-23 17:17:15,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 17:17:15,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:15,024 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:15,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:15,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:15,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:15,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:17:15,626 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:15,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:15,626 INFO L85 PathProgramCache]: Analyzing trace with hash 160329932, now seen corresponding path program 4 times [2021-11-23 17:17:15,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:15,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818266410] [2021-11-23 17:17:15,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:17:15,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:15,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:15,628 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:15,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:17:15,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:17:15,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:17:15,715 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-23 17:17:15,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:22,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:48,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:48,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818266410] [2021-11-23 17:17:48,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818266410] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:48,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [142669972] [2021-11-23 17:17:48,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:17:48,614 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:17:48,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:17:48,615 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:17:48,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 17:17:48,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:17:48,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:17:48,798 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-23 17:17:48,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:54,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:18:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:17,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [142669972] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:18:17,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044533605] [2021-11-23 17:18:17,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:18:17,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:18:17,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:18:17,599 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:18:17,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 17:18:17,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:18:17,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:18:17,786 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-23 17:18:17,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:22,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:18:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:40,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044533605] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:18:40,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:18:40,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 28, 28] total 84 [2021-11-23 17:18:40,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004816637] [2021-11-23 17:18:40,968 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:18:40,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-23 17:18:40,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:40,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-23 17:18:40,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1741, Invalid=5231, Unknown=0, NotChecked=0, Total=6972 [2021-11-23 17:18:40,976 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 84 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 84 states have internal predecessors, (91), 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) [2021-11-23 17:19:36,671 WARN L227 SmtUtils]: Spent 44.81s on a formula simplification. DAG size of input: 197 DAG size of output: 187 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:20:26,636 WARN L227 SmtUtils]: Spent 42.27s on a formula simplification. DAG size of input: 188 DAG size of output: 178 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:21:06,131 WARN L227 SmtUtils]: Spent 29.31s on a formula simplification. DAG size of input: 180 DAG size of output: 171 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:21:41,542 WARN L227 SmtUtils]: Spent 26.19s on a formula simplification. DAG size of input: 171 DAG size of output: 163 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:22:12,283 WARN L227 SmtUtils]: Spent 23.55s on a formula simplification. DAG size of input: 162 DAG size of output: 154 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:22:37,923 WARN L227 SmtUtils]: Spent 19.31s on a formula simplification. DAG size of input: 153 DAG size of output: 146 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:22:56,558 WARN L227 SmtUtils]: Spent 12.80s on a formula simplification. DAG size of input: 144 DAG size of output: 138 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:23:17,903 WARN L227 SmtUtils]: Spent 16.35s on a formula simplification. DAG size of input: 135 DAG size of output: 129 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:23:34,076 WARN L227 SmtUtils]: Spent 11.14s on a formula simplification. DAG size of input: 127 DAG size of output: 121 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:23:47,707 WARN L227 SmtUtils]: Spent 9.08s on a formula simplification. DAG size of input: 118 DAG size of output: 112 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:23:59,373 WARN L227 SmtUtils]: Spent 7.63s on a formula simplification. DAG size of input: 109 DAG size of output: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:25:42,592 WARN L227 SmtUtils]: Spent 38.08s on a formula simplification. DAG size of input: 195 DAG size of output: 180 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:25:42,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:42,966 INFO L93 Difference]: Finished difference Result 76 states and 99 transitions. [2021-11-23 17:25:42,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-23 17:25:42,973 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 84 states have internal predecessors, (91), 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 29 [2021-11-23 17:25:42,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:42,976 INFO L225 Difference]: With dead ends: 76 [2021-11-23 17:25:42,976 INFO L226 Difference]: Without dead ends: 54 [2021-11-23 17:25:42,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 72 SyntacticMatches, 14 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4180 ImplicationChecksByTransitivity, 484.0s TimeCoverageRelationStatistics Valid=4594, Invalid=11408, Unknown=0, NotChecked=0, Total=16002 [2021-11-23 17:25:42,982 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 769 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:42,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 70 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 626 Invalid, 0 Unknown, 30 Unchecked, 6.0s Time] [2021-11-23 17:25:42,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-23 17:25:43,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-23 17:25:43,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 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) [2021-11-23 17:25:43,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-11-23 17:25:43,004 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 29 [2021-11-23 17:25:43,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:43,005 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-11-23 17:25:43,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 84 states have internal predecessors, (91), 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) [2021-11-23 17:25:43,005 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-11-23 17:25:43,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 17:25:43,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:43,008 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:43,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:43,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-23 17:25:43,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-23 17:25:43,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:43,618 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:43,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:43,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1226580788, now seen corresponding path program 5 times [2021-11-23 17:25:43,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:43,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988984714] [2021-11-23 17:25:43,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:25:43,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:43,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:43,620 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:43,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:25:44,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-23 17:25:44,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:25:44,131 WARN L261 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 145 conjunts are in the unsatisfiable core [2021-11-23 17:25:44,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:06,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:25,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:25,620 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:28:25,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988984714] [2021-11-23 17:28:25,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988984714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:28:25,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [240312989] [2021-11-23 17:28:25,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:28:25,620 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:28:25,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:28:25,622 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:28:25,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 17:28:26,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-23 17:28:26,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:28:26,718 WARN L261 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 134 conjunts are in the unsatisfiable core [2021-11-23 17:28:26,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:51,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:55,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [240312989] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:55,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103216134] [2021-11-23 17:29:55,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:29:55,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:29:55,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:29:55,804 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:29:55,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b99dff-0f35-4b8f-bda2-5458cc443226/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 17:29:57,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-23 17:29:57,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:29:57,706 WARN L261 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 145 conjunts are in the unsatisfiable core [2021-11-23 17:29:57,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:08,616 INFO L328 TraceCheckSpWp]: Computing backward predicates...