./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/Muller_Kahan.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/Muller_Kahan.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9 --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 61ce2c272542663cace3442e405f7ab093d2a72e636da199b8b44596c79af6c9 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 20:41:42,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:41:42,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:41:42,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:41:42,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:41:42,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:41:42,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:41:42,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:41:42,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:41:42,651 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:41:42,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:41:42,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:41:42,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:41:42,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:41:42,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:41:42,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:41:42,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:41:42,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:41:42,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:41:42,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:41:42,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:41:42,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:41:42,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:41:42,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:41:42,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:41:42,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:41:42,692 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:41:42,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:41:42,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:41:42,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:41:42,697 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:41:42,698 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:41:42,700 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:41:42,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:41:42,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:41:42,703 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:41:42,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:41:42,704 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:41:42,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:41:42,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:41:42,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:41:42,709 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:41:42,752 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:41:42,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:41:42,753 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:41:42,753 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:41:42,754 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:41:42,755 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:41:42,755 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:41:42,755 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:41:42,756 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:41:42,756 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:41:42,757 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:41:42,758 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:41:42,758 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:41:42,758 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:41:42,758 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:41:42,759 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:41:42,759 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:41:42,759 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:41:42,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:41:42,761 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:41:42,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:41:42,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:41:42,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:41:42,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:41:42,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:41:42,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:41:42,764 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:41:42,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:41:42,764 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:41:42,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:41:42,765 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:41:42,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:41:42,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:41:42,766 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:41:42,766 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:41:42,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:41:42,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:41:42,767 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:41:42,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:41:42,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:41:42,768 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:41:42,768 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61ce2c272542663cace3442e405f7ab093d2a72e636da199b8b44596c79af6c9 [2022-11-20 20:41:43,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:41:43,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:41:43,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:41:43,170 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:41:43,171 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:41:43,172 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/float-benchs/Muller_Kahan.c [2022-11-20 20:41:46,272 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:41:46,484 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:41:46,485 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/sv-benchmarks/c/float-benchs/Muller_Kahan.c [2022-11-20 20:41:46,491 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/data/7c92df912/c1e1e5e7a00d4615a05477dcf754bb57/FLAG85eff4ad4 [2022-11-20 20:41:46,510 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/data/7c92df912/c1e1e5e7a00d4615a05477dcf754bb57 [2022-11-20 20:41:46,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:41:46,514 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:41:46,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:41:46,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:41:46,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:41:46,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:41:46" (1/1) ... [2022-11-20 20:41:46,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d8ec362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:46, skipping insertion in model container [2022-11-20 20:41:46,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:41:46" (1/1) ... [2022-11-20 20:41:46,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:41:46,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:41:46,723 WARN L237 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_7069c46e-9f81-4012-8b12-58d56f494257/sv-benchmarks/c/float-benchs/Muller_Kahan.c[631,644] [2022-11-20 20:41:46,783 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:41:46,827 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:41:46,840 WARN L237 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_7069c46e-9f81-4012-8b12-58d56f494257/sv-benchmarks/c/float-benchs/Muller_Kahan.c[631,644] [2022-11-20 20:41:46,843 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:41:46,857 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:41:46,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:46 WrapperNode [2022-11-20 20:41:46,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:41:46,859 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:41:46,859 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:41:46,859 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:41:46,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:46" (1/1) ... [2022-11-20 20:41:46,873 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:46" (1/1) ... [2022-11-20 20:41:46,891 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 36 [2022-11-20 20:41:46,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:41:46,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:41:46,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:41:46,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:41:46,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:46" (1/1) ... [2022-11-20 20:41:46,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:46" (1/1) ... [2022-11-20 20:41:46,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:46" (1/1) ... [2022-11-20 20:41:46,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:46" (1/1) ... [2022-11-20 20:41:46,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:46" (1/1) ... [2022-11-20 20:41:46,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:46" (1/1) ... [2022-11-20 20:41:46,927 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:46" (1/1) ... [2022-11-20 20:41:46,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:46" (1/1) ... [2022-11-20 20:41:46,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:41:46,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:41:46,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:41:46,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:41:46,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:46" (1/1) ... [2022-11-20 20:41:46,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:41:46,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:41:46,964 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:41:46,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:41:47,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:41:47,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:41:47,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:41:47,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:41:47,074 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:41:47,076 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:41:47,176 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:41:47,204 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:41:47,204 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 20:41:47,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:41:47 BoogieIcfgContainer [2022-11-20 20:41:47,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:41:47,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:41:47,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:41:47,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:41:47,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:41:46" (1/3) ... [2022-11-20 20:41:47,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3178ee98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:41:47, skipping insertion in model container [2022-11-20 20:41:47,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:41:46" (2/3) ... [2022-11-20 20:41:47,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3178ee98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:41:47, skipping insertion in model container [2022-11-20 20:41:47,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:41:47" (3/3) ... [2022-11-20 20:41:47,216 INFO L112 eAbstractionObserver]: Analyzing ICFG Muller_Kahan.c [2022-11-20 20:41:47,237 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:41:47,237 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:41:47,290 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:41:47,297 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6e173ad7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:41:47,297 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:41:47,303 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 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) [2022-11-20 20:41:47,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 20:41:47,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:41:47,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 20:41:47,312 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:41:47,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:41:47,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1941830, now seen corresponding path program 1 times [2022-11-20 20:41:47,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:41:47,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132490312] [2022-11-20 20:41:47,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:41:47,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:41:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:41:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:47,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:41:47,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132490312] [2022-11-20 20:41:47,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132490312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:41:47,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:41:47,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:41:47,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098197669] [2022-11-20 20:41:47,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:41:47,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:41:47,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:41:47,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:41:47,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:41:47,639 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 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) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-20 20:41:47,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:41:47,681 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2022-11-20 20:41:47,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:41:47,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2022-11-20 20:41:47,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:41:47,692 INFO L225 Difference]: With dead ends: 13 [2022-11-20 20:41:47,692 INFO L226 Difference]: Without dead ends: 6 [2022-11-20 20:41:47,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:41:47,700 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:41:47,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:41:47,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2022-11-20 20:41:47,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2022-11-20 20:41:47,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:41:47,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2022-11-20 20:41:47,740 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2022-11-20 20:41:47,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:41:47,741 INFO L495 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2022-11-20 20:41:47,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-20 20:41:47,742 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2022-11-20 20:41:47,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:41:47,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:41:47,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:41:47,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:41:47,743 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:41:47,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:41:47,744 INFO L85 PathProgramCache]: Analyzing trace with hash 60093862, now seen corresponding path program 1 times [2022-11-20 20:41:47,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:41:47,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684908987] [2022-11-20 20:41:47,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:41:47,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:41:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:41:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:47,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:41:47,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684908987] [2022-11-20 20:41:47,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684908987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:41:47,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244956531] [2022-11-20 20:41:47,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:41:47,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:41:47,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:41:47,902 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:41:47,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 20:41:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:41:47,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:41:48,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:41:48,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:48,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:41:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:48,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244956531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:41:48,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1337517671] [2022-11-20 20:41:48,088 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-20 20:41:48,088 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:41:48,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:41:48,096 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:41:48,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:41:48,343 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:41:48,469 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '69#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:41:48,470 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:41:48,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:41:48,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-20 20:41:48,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304826982] [2022-11-20 20:41:48,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:41:48,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:41:48,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:41:48,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:41:48,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:41:48,479 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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) [2022-11-20 20:41:48,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:41:48,506 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2022-11-20 20:41:48,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:41:48,511 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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 5 [2022-11-20 20:41:48,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:41:48,511 INFO L225 Difference]: With dead ends: 12 [2022-11-20 20:41:48,512 INFO L226 Difference]: Without dead ends: 9 [2022-11-20 20:41:48,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:41:48,515 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:41:48,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:41:48,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-20 20:41:48,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-20 20:41:48,522 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) [2022-11-20 20:41:48,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-20 20:41:48,523 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-20 20:41:48,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:41:48,524 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-20 20:41:48,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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) [2022-11-20 20:41:48,524 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-20 20:41:48,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:41:48,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:41:48,525 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2022-11-20 20:41:48,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 20:41:48,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:41:48,730 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:41:48,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:41:48,731 INFO L85 PathProgramCache]: Analyzing trace with hash -847267514, now seen corresponding path program 2 times [2022-11-20 20:41:48,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:41:48,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946069687] [2022-11-20 20:41:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:41:48,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:41:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:41:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:48,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:41:48,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946069687] [2022-11-20 20:41:48,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946069687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:41:48,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313788247] [2022-11-20 20:41:48,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:41:48,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:41:48,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:41:48,852 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:41:48,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 20:41:48,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:41:48,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:41:48,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:41:48,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:41:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:48,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:41:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:49,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313788247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:41:49,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1337078473] [2022-11-20 20:41:49,006 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-20 20:41:49,006 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:41:49,006 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:41:49,006 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:41:49,007 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:41:49,077 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:41:49,172 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '158#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:41:49,173 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:41:49,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:41:49,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-20 20:41:49,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227542369] [2022-11-20 20:41:49,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:41:49,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 20:41:49,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:41:49,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 20:41:49,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-11-20 20:41:49,175 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:41:49,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:41:49,213 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2022-11-20 20:41:49,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:41:49,214 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 20:41:49,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:41:49,214 INFO L225 Difference]: With dead ends: 18 [2022-11-20 20:41:49,214 INFO L226 Difference]: Without dead ends: 15 [2022-11-20 20:41:49,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-11-20 20:41:49,216 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:41:49,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:41:49,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-20 20:41:49,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-20 20:41:49,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 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) [2022-11-20 20:41:49,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-11-20 20:41:49,221 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2022-11-20 20:41:49,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:41:49,221 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-11-20 20:41:49,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:41:49,222 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-11-20 20:41:49,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:41:49,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:41:49,222 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2022-11-20 20:41:49,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:41:49,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:41:49,428 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:41:49,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:41:49,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1112253114, now seen corresponding path program 3 times [2022-11-20 20:41:49,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:41:49,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563443627] [2022-11-20 20:41:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:41:49,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:41:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:41:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:49,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:41:49,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563443627] [2022-11-20 20:41:49,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563443627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:41:49,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171383897] [2022-11-20 20:41:49,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:41:49,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:41:49,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:41:49,727 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:41:49,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 20:41:49,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:41:49,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:41:49,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:41:49,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:41:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:49,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:41:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:50,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171383897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:41:50,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [886882182] [2022-11-20 20:41:50,152 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-20 20:41:50,153 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:41:50,153 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:41:50,153 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:41:50,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:41:50,221 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:41:50,323 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '319#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:41:50,324 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:41:50,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:41:50,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-20 20:41:50,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919858419] [2022-11-20 20:41:50,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:41:50,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 20:41:50,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:41:50,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 20:41:50,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2022-11-20 20:41:50,331 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 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) [2022-11-20 20:41:50,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:41:50,398 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2022-11-20 20:41:50,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 20:41:50,399 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 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 14 [2022-11-20 20:41:50,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:41:50,400 INFO L225 Difference]: With dead ends: 30 [2022-11-20 20:41:50,400 INFO L226 Difference]: Without dead ends: 27 [2022-11-20 20:41:50,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2022-11-20 20:41:50,401 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:41:50,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:41:50,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-20 20:41:50,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-20 20:41:50,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 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) [2022-11-20 20:41:50,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-11-20 20:41:50,407 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2022-11-20 20:41:50,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:41:50,407 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-11-20 20:41:50,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 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) [2022-11-20 20:41:50,408 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-11-20 20:41:50,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 20:41:50,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:41:50,409 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2022-11-20 20:41:50,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:41:50,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:41:50,614 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:41:50,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:41:50,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1732027718, now seen corresponding path program 4 times [2022-11-20 20:41:50,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:41:50,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042931043] [2022-11-20 20:41:50,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:41:50,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:41:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:41:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:51,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:41:51,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042931043] [2022-11-20 20:41:51,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042931043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:41:51,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455366427] [2022-11-20 20:41:51,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:41:51,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:41:51,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:41:51,243 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:41:51,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:41:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:41:51,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 20:41:51,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:41:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:51,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:41:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:52,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455366427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:41:52,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [923047606] [2022-11-20 20:41:52,327 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-20 20:41:52,328 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:41:52,328 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:41:52,328 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:41:52,328 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:41:52,387 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:41:52,515 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '624#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:41:52,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:41:52,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:41:52,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-20 20:41:52,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126375066] [2022-11-20 20:41:52,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:41:52,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 20:41:52,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:41:52,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 20:41:52,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1185, Invalid=1467, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 20:41:52,522 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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) [2022-11-20 20:41:52,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:41:52,624 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2022-11-20 20:41:52,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-20 20:41:52,625 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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 26 [2022-11-20 20:41:52,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:41:52,626 INFO L225 Difference]: With dead ends: 54 [2022-11-20 20:41:52,626 INFO L226 Difference]: Without dead ends: 51 [2022-11-20 20:41:52,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1185, Invalid=1467, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 20:41:52,628 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:41:52,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:41:52,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-20 20:41:52,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-20 20:41:52,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 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) [2022-11-20 20:41:52,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-11-20 20:41:52,648 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2022-11-20 20:41:52,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:41:52,648 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-11-20 20:41:52,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 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) [2022-11-20 20:41:52,649 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-11-20 20:41:52,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 20:41:52,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:41:52,650 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2022-11-20 20:41:52,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 20:41:52,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:41:52,856 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:41:52,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:41:52,856 INFO L85 PathProgramCache]: Analyzing trace with hash 97072454, now seen corresponding path program 5 times [2022-11-20 20:41:52,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:41:52,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263134797] [2022-11-20 20:41:52,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:41:52,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:41:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:41:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:54,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:41:54,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263134797] [2022-11-20 20:41:54,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263134797] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:41:54,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280080470] [2022-11-20 20:41:54,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:41:54,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:41:54,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:41:54,663 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:41:54,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 20:41:54,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-20 20:41:54,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:41:54,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-20 20:41:54,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:41:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:54,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:41:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:58,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280080470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:41:58,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1681173056] [2022-11-20 20:41:58,111 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-20 20:41:58,111 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:41:58,112 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:41:58,112 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:41:58,112 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:41:58,171 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:41:58,341 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1217#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:41:58,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:41:58,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:41:58,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-11-20 20:41:58,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955296593] [2022-11-20 20:41:58,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:41:58,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-20 20:41:58,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:41:58,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-20 20:41:58,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4665, Invalid=5235, Unknown=0, NotChecked=0, Total=9900 [2022-11-20 20:41:58,347 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 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) [2022-11-20 20:41:58,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:41:58,564 INFO L93 Difference]: Finished difference Result 102 states and 149 transitions. [2022-11-20 20:41:58,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-20 20:41:58,564 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 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 50 [2022-11-20 20:41:58,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:41:58,570 INFO L225 Difference]: With dead ends: 102 [2022-11-20 20:41:58,570 INFO L226 Difference]: Without dead ends: 99 [2022-11-20 20:41:58,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4665, Invalid=5235, Unknown=0, NotChecked=0, Total=9900 [2022-11-20 20:41:58,575 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:41:58,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:41:58,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-20 20:41:58,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-20 20:41:58,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 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) [2022-11-20 20:41:58,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-11-20 20:41:58,594 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2022-11-20 20:41:58,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:41:58,594 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-11-20 20:41:58,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 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) [2022-11-20 20:41:58,595 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-11-20 20:41:58,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-20 20:41:58,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:41:58,599 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1] [2022-11-20 20:41:58,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:41:58,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 20:41:58,805 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:41:58,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:41:58,806 INFO L85 PathProgramCache]: Analyzing trace with hash 684873030, now seen corresponding path program 6 times [2022-11-20 20:41:58,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:41:58,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630123090] [2022-11-20 20:41:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:41:58,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:41:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:42:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:04,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:42:04,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630123090] [2022-11-20 20:42:04,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630123090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:42:04,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466199632] [2022-11-20 20:42:04,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:42:04,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:42:04,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:42:04,423 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:42:04,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 20:42:04,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:42:04,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:42:04,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-20 20:42:04,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:42:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:04,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:42:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:09,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466199632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:42:09,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [701069857] [2022-11-20 20:42:09,302 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-20 20:42:09,302 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:42:09,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:42:09,303 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:42:09,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:42:09,349 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:42:09,612 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2296#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:42:09,612 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:42:09,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:42:09,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 102 [2022-11-20 20:42:09,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990230675] [2022-11-20 20:42:09,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:42:09,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-11-20 20:42:09,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:42:09,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-11-20 20:42:09,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5262, Invalid=5868, Unknown=0, NotChecked=0, Total=11130 [2022-11-20 20:42:09,619 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 103 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 102 states have internal predecessors, (107), 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) [2022-11-20 20:42:09,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:42:09,829 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2022-11-20 20:42:09,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-11-20 20:42:09,829 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 102 states have internal predecessors, (107), 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 98 [2022-11-20 20:42:09,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:42:09,830 INFO L225 Difference]: With dead ends: 108 [2022-11-20 20:42:09,831 INFO L226 Difference]: Without dead ends: 105 [2022-11-20 20:42:09,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 194 SyntacticMatches, 90 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5146 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=5262, Invalid=5868, Unknown=0, NotChecked=0, Total=11130 [2022-11-20 20:42:09,835 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:42:09,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:42:09,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-20 20:42:09,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-20 20:42:09,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 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) [2022-11-20 20:42:09,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2022-11-20 20:42:09,850 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 98 [2022-11-20 20:42:09,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:42:09,851 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2022-11-20 20:42:09,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 102 states have internal predecessors, (107), 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) [2022-11-20 20:42:09,852 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2022-11-20 20:42:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-20 20:42:09,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:42:09,853 INFO L195 NwaCegarLoop]: trace histogram [100, 1, 1, 1, 1] [2022-11-20 20:42:09,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-20 20:42:10,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:42:10,059 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:42:10,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:42:10,059 INFO L85 PathProgramCache]: Analyzing trace with hash 530708806, now seen corresponding path program 7 times [2022-11-20 20:42:10,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:42:10,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293693066] [2022-11-20 20:42:10,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:42:10,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:42:10,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:42:10,119 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 20:42:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 20:42:10,211 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 20:42:10,212 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 20:42:10,214 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 20:42:10,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 20:42:10,219 INFO L444 BasicCegarLoop]: Path program histogram: [7, 1] [2022-11-20 20:42:10,223 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 20:42:10,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 08:42:10 BoogieIcfgContainer [2022-11-20 20:42:10,343 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 20:42:10,344 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 20:42:10,344 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 20:42:10,344 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 20:42:10,345 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:41:47" (3/4) ... [2022-11-20 20:42:10,347 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-20 20:42:10,347 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 20:42:10,348 INFO L158 Benchmark]: Toolchain (without parser) took 23833.89ms. Allocated memory was 123.7MB in the beginning and 268.4MB in the end (delta: 144.7MB). Free memory was 72.4MB in the beginning and 189.0MB in the end (delta: -116.6MB). Peak memory consumption was 29.7MB. Max. memory is 16.1GB. [2022-11-20 20:42:10,348 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 123.7MB. Free memory is still 95.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 20:42:10,349 INFO L158 Benchmark]: CACSL2BoogieTranslator took 338.84ms. Allocated memory was 123.7MB in the beginning and 153.1MB in the end (delta: 29.4MB). Free memory was 72.2MB in the beginning and 125.0MB in the end (delta: -52.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 20:42:10,349 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.81ms. Allocated memory is still 153.1MB. Free memory was 125.0MB in the beginning and 123.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 20:42:10,349 INFO L158 Benchmark]: Boogie Preprocessor took 37.42ms. Allocated memory is still 153.1MB. Free memory was 123.6MB in the beginning and 122.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 20:42:10,350 INFO L158 Benchmark]: RCFGBuilder took 276.01ms. Allocated memory is still 153.1MB. Free memory was 122.5MB in the beginning and 112.5MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 20:42:10,350 INFO L158 Benchmark]: TraceAbstraction took 23133.69ms. Allocated memory was 153.1MB in the beginning and 268.4MB in the end (delta: 115.3MB). Free memory was 111.6MB in the beginning and 189.0MB in the end (delta: -77.3MB). Peak memory consumption was 40.3MB. Max. memory is 16.1GB. [2022-11-20 20:42:10,350 INFO L158 Benchmark]: Witness Printer took 3.85ms. Allocated memory is still 268.4MB. Free memory is still 189.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 20:42:10,352 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 123.7MB. Free memory is still 95.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 338.84ms. Allocated memory was 123.7MB in the beginning and 153.1MB in the end (delta: 29.4MB). Free memory was 72.2MB in the beginning and 125.0MB in the end (delta: -52.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.81ms. Allocated memory is still 153.1MB. Free memory was 125.0MB in the beginning and 123.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 37.42ms. Allocated memory is still 153.1MB. Free memory was 123.6MB in the beginning and 122.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 276.01ms. Allocated memory is still 153.1MB. Free memory was 122.5MB in the beginning and 112.5MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 23133.69ms. Allocated memory was 153.1MB in the beginning and 268.4MB in the end (delta: 115.3MB). Free memory was 111.6MB in the beginning and 189.0MB in the end (delta: -77.3MB). Peak memory consumption was 40.3MB. Max. memory is 16.1GB. * Witness Printer took 3.85ms. Allocated memory is still 268.4MB. Free memory is still 189.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 27, overapproximation of someBinaryArithmeticDOUBLEoperation at line 22. Possible FailurePath: [L16] double x0, x1, x2; [L17] int i; [L19] x0 = 11. / 2. [L20] x1 = 61. / 11. [L21] i = 0 VAL [i=0] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=1, x0=132, x1=186, x2=186] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=2, x0=186, x1=114, x2=114] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=3, x0=114, x1=111, x2=111] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=4, x0=111, x1=124, x2=124] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=5, x0=124, x1=107, x2=107] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=6, x0=107, x1=198, x2=198] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=7, x0=198, x1=196, x2=196] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=8, x0=196, x1=130, x2=130] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=9, x0=130, x1=109, x2=109] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=10, x0=109, x1=140, x2=140] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=11, x0=140, x1=105, x2=105] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=12, x0=105, x1=144, x2=144] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=13, x0=144, x1=155, x2=155] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=14, x0=155, x1=157, x2=157] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=15, x0=157, x1=163, x2=163] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=16, x0=163, x1=202, x2=202] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=17, x0=202, x1=115, x2=115] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=18, x0=115, x1=179, x2=179] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=19, x0=179, x1=117, x2=117] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=20, x0=117, x1=204, x2=204] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=21, x0=204, x1=137, x2=137] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=22, x0=137, x1=174, x2=174] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=23, x0=174, x1=116, x2=116] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=24, x0=116, x1=148, x2=148] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=25, x0=148, x1=135, x2=135] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=26, x0=135, x1=200, x2=200] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=27, x0=200, x1=108, x2=108] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=28, x0=108, x1=128, x2=128] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=29, x0=128, x1=187, x2=187] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=30, x0=187, x1=175, x2=175] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=31, x0=175, x1=138, x2=138] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=32, x0=138, x1=123, x2=123] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=33, x0=123, x1=161, x2=161] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=34, x0=161, x1=142, x2=142] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=35, x0=142, x1=129, x2=129] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=36, x0=129, x1=169, x2=169] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=37, x0=169, x1=182, x2=182] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=38, x0=182, x1=199, x2=199] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=39, x0=199, x1=166, x2=166] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=40, x0=166, x1=159, x2=159] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=41, x0=159, x1=192, x2=192] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=42, x0=192, x1=171, x2=171] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=43, x0=171, x1=150, x2=150] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=44, x0=150, x1=151, x2=151] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=45, x0=151, x1=172, x2=172] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=46, x0=172, x1=133, x2=133] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=47, x0=133, x1=170, x2=170] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=48, x0=170, x1=146, x2=146] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=49, x0=146, x1=160, x2=160] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=50, x0=160, x1=195, x2=195] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=51, x0=195, x1=194, x2=194] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=52, x0=194, x1=167, x2=167] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=53, x0=167, x1=183, x2=183] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=54, x0=183, x1=139, x2=139] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=55, x0=139, x1=147, x2=147] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=56, x0=147, x1=180, x2=180] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=57, x0=180, x1=153, x2=153] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=58, x0=153, x1=143, x2=143] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=59, x0=143, x1=158, x2=158] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=60, x0=158, x1=119, x2=119] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=61, x0=119, x1=191, x2=191] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=62, x0=191, x1=121, x2=121] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=63, x0=121, x1=173, x2=173] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=64, x0=173, x1=149, x2=149] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=65, x0=149, x1=162, x2=162] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=66, x0=162, x1=201, x2=201] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=67, x0=201, x1=193, x2=193] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=68, x0=193, x1=136, x2=136] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=69, x0=136, x1=113, x2=113] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=70, x0=113, x1=110, x2=110] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=71, x0=110, x1=127, x2=127] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=72, x0=127, x1=189, x2=189] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=73, x0=189, x1=165, x2=165] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=74, x0=165, x1=106, x2=106] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=75, x0=106, x1=118, x2=118] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=76, x0=118, x1=176, x2=176] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=77, x0=176, x1=185, x2=185] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=78, x0=185, x1=122, x2=122] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=79, x0=122, x1=131, x2=131] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=80, x0=131, x1=152, x2=152] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=81, x0=152, x1=154, x2=154] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=82, x0=154, x1=178, x2=178] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=83, x0=178, x1=197, x2=197] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=84, x0=197, x1=112, x2=112] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=85, x0=112, x1=203, x2=203] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=86, x0=203, x1=126, x2=126] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=87, x0=126, x1=190, x2=190] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=88, x0=190, x1=188, x2=188] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=89, x0=188, x1=168, x2=168] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=90, x0=168, x1=125, x2=125] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=91, x0=125, x1=181, x2=181] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=92, x0=181, x1=120, x2=120] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=93, x0=120, x1=177, x2=177] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=94, x0=177, x1=205, x2=205] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=95, x0=205, x1=134, x2=134] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=96, x0=134, x1=141, x2=141] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=97, x0=141, x1=156, x2=156] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=98, x0=156, x1=184, x2=184] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=99, x0=184, x1=164, x2=164] [L21] COND TRUE i < 100 [L22] x2 = 111. - (1130. - 3000. / x0) / x1 [L23] x0 = x1 [L24] x1 = x2 [L21] i++ VAL [i=100, x0=164, x1=145, x2=145] [L21] COND FALSE !(i < 100) [L27] CALL __VERIFIER_assert(x0 >= 99. && x0 <= 101.) [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L12] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 22.9s, OverallIterations: 8, TraceHistogramMax: 100, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 60 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 45 mSDsCounter, 110 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 326 IncrementalHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 110 mSolverCounterUnsat, 15 mSDtfsCounter, 326 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 782 GetRequests, 391 SyntacticMatches, 90 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6270 ImplicationChecksByTransitivity, 14.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=7, InterpolantAutomatonStates: 291, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 17.9s InterpolantComputationTime, 510 NumberOfCodeBlocks, 510 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 588 ConstructedInterpolants, 0 QuantifiedInterpolants, 1688 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1449 ConjunctsInSsa, 189 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 0/17595 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-20 20:42:10,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/Muller_Kahan.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9 --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 61ce2c272542663cace3442e405f7ab093d2a72e636da199b8b44596c79af6c9 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 20:42:12,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:42:12,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:42:12,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:42:12,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:42:12,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:42:12,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:42:12,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:42:12,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:42:12,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:42:12,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:42:12,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:42:12,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:42:12,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:42:12,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:42:12,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:42:12,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:42:12,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:42:12,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:42:12,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:42:12,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:42:12,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:42:12,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:42:12,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:42:12,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:42:12,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:42:12,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:42:12,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:42:12,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:42:12,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:42:12,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:42:12,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:42:12,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:42:12,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:42:12,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:42:12,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:42:12,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:42:12,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:42:12,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:42:12,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:42:12,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:42:12,917 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-20 20:42:12,942 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:42:12,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:42:12,943 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:42:12,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:42:12,945 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:42:12,945 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:42:12,945 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:42:12,945 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:42:12,946 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:42:12,946 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:42:12,946 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:42:12,947 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:42:12,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:42:12,948 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:42:12,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:42:12,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:42:12,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:42:12,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:42:12,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:42:12,950 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 20:42:12,950 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 20:42:12,950 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 20:42:12,950 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:42:12,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:42:12,951 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:42:12,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:42:12,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:42:12,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 20:42:12,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:42:12,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:42:12,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:42:12,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:42:12,953 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:42:12,953 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 20:42:12,953 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 20:42:12,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:42:12,954 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:42:12,954 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 20:42:12,954 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_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61ce2c272542663cace3442e405f7ab093d2a72e636da199b8b44596c79af6c9 [2022-11-20 20:42:13,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:42:13,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:42:13,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:42:13,359 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:42:13,359 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:42:13,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/float-benchs/Muller_Kahan.c [2022-11-20 20:42:16,619 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:42:16,920 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:42:16,921 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/sv-benchmarks/c/float-benchs/Muller_Kahan.c [2022-11-20 20:42:16,928 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/data/5d6dccb51/4ab3a348a42940899792696c02873157/FLAG2c237c855 [2022-11-20 20:42:16,954 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/data/5d6dccb51/4ab3a348a42940899792696c02873157 [2022-11-20 20:42:16,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:42:16,961 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:42:16,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:42:16,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:42:16,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:42:16,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:42:16" (1/1) ... [2022-11-20 20:42:16,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a0bd2b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:42:16, skipping insertion in model container [2022-11-20 20:42:16,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:42:16" (1/1) ... [2022-11-20 20:42:16,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:42:17,003 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:42:17,133 WARN L237 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_7069c46e-9f81-4012-8b12-58d56f494257/sv-benchmarks/c/float-benchs/Muller_Kahan.c[631,644] [2022-11-20 20:42:17,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:42:17,172 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:42:17,194 WARN L237 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_7069c46e-9f81-4012-8b12-58d56f494257/sv-benchmarks/c/float-benchs/Muller_Kahan.c[631,644] [2022-11-20 20:42:17,201 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:42:17,226 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:42:17,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:42:17 WrapperNode [2022-11-20 20:42:17,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:42:17,229 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:42:17,229 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:42:17,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:42:17,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:42:17" (1/1) ... [2022-11-20 20:42:17,251 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:42:17" (1/1) ... [2022-11-20 20:42:17,272 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 37 [2022-11-20 20:42:17,273 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:42:17,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:42:17,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:42:17,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:42:17,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:42:17" (1/1) ... [2022-11-20 20:42:17,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:42:17" (1/1) ... [2022-11-20 20:42:17,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:42:17" (1/1) ... [2022-11-20 20:42:17,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:42:17" (1/1) ... [2022-11-20 20:42:17,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:42:17" (1/1) ... [2022-11-20 20:42:17,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:42:17" (1/1) ... [2022-11-20 20:42:17,324 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:42:17" (1/1) ... [2022-11-20 20:42:17,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:42:17" (1/1) ... [2022-11-20 20:42:17,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:42:17,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:42:17,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:42:17,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:42:17,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:42:17" (1/1) ... [2022-11-20 20:42:17,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:42:17,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:42:17,384 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:42:17,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:42:17,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:42:17,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:42:17,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:42:17,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 20:42:17,560 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:42:17,563 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:42:21,083 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:42:21,090 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:42:21,090 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 20:42:21,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:42:21 BoogieIcfgContainer [2022-11-20 20:42:21,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:42:21,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:42:21,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:42:21,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:42:21,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:42:16" (1/3) ... [2022-11-20 20:42:21,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a9bd9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:42:21, skipping insertion in model container [2022-11-20 20:42:21,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:42:17" (2/3) ... [2022-11-20 20:42:21,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a9bd9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:42:21, skipping insertion in model container [2022-11-20 20:42:21,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:42:21" (3/3) ... [2022-11-20 20:42:21,103 INFO L112 eAbstractionObserver]: Analyzing ICFG Muller_Kahan.c [2022-11-20 20:42:21,145 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:42:21,145 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:42:21,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:42:21,229 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@f18ad78, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:42:21,230 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:42:21,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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) [2022-11-20 20:42:21,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:42:21,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:42:21,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 20:42:21,253 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:42:21,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:42:21,259 INFO L85 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2022-11-20 20:42:21,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:42:21,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383069800] [2022-11-20 20:42:21,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:42:21,273 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:42:21,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:42:21,279 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:42:21,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 20:42:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:42:21,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:42:21,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:42:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:21,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:42:21,505 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:42:21,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383069800] [2022-11-20 20:42:21,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383069800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:42:21,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:42:21,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:42:21,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503022091] [2022-11-20 20:42:21,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:42:21,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:42:21,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:42:21,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:42:21,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:42:21,552 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:42:25,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:42:26,344 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2022-11-20 20:42:26,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:42:26,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 20:42:26,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:42:26,361 INFO L225 Difference]: With dead ends: 21 [2022-11-20 20:42:26,362 INFO L226 Difference]: Without dead ends: 9 [2022-11-20 20:42:26,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:42:26,370 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:42:26,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-11-20 20:42:26,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-20 20:42:26,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-20 20:42:26,399 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) [2022-11-20 20:42:26,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-20 20:42:26,402 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2022-11-20 20:42:26,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:42:26,402 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-20 20:42:26,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:42:26,403 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-20 20:42:26,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:42:26,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:42:26,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:42:26,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-20 20:42:26,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:42:26,605 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:42:26,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:42:26,607 INFO L85 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2022-11-20 20:42:26,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:42:26,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [869596746] [2022-11-20 20:42:26,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:42:26,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:42:26,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:42:26,610 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:42:26,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-20 20:42:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:42:28,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:42:28,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:42:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:28,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:42:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:28,998 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:42:28,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [869596746] [2022-11-20 20:42:28,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [869596746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:42:28,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1238229496] [2022-11-20 20:42:28,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:42:29,000 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:42:29,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:42:29,035 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:42:29,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-20 20:42:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:42:31,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:42:31,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:42:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:31,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:42:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:31,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1238229496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:42:31,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226136436] [2022-11-20 20:42:31,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:42:31,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:42:31,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:42:31,546 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:42:31,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:42:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:42:35,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:42:35,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:42:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:35,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:42:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:35,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226136436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:42:35,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:42:35,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2022-11-20 20:42:35,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718374680] [2022-11-20 20:42:35,212 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:42:35,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:42:35,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:42:35,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:42:35,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:42:35,214 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2022-11-20 20:42:40,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:46,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:47,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:42:47,238 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-11-20 20:42:47,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:42:47,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 20:42:47,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:42:47,239 INFO L225 Difference]: With dead ends: 17 [2022-11-20 20:42:47,240 INFO L226 Difference]: Without dead ends: 13 [2022-11-20 20:42:47,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:42:47,242 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:42:47,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 2 Unknown, 0 Unchecked, 12.0s Time] [2022-11-20 20:42:47,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-20 20:42:47,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-20 20:42:47,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 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) [2022-11-20 20:42:47,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-11-20 20:42:47,248 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2022-11-20 20:42:47,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:42:47,249 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-11-20 20:42:47,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2022-11-20 20:42:47,249 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-11-20 20:42:47,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:42:47,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:42:47,251 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2022-11-20 20:42:47,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 20:42:47,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:42:47,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:42:47,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:42:47,859 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:42:47,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:42:47,859 INFO L85 PathProgramCache]: Analyzing trace with hash 833881267, now seen corresponding path program 2 times [2022-11-20 20:42:47,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:42:47,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421217822] [2022-11-20 20:42:47,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:42:47,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:42:47,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:42:47,863 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:42:47,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-20 20:42:52,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:42:52,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:42:53,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:42:53,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:42:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:53,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:42:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:55,034 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:42:55,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421217822] [2022-11-20 20:42:55,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421217822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:42:55,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1017472700] [2022-11-20 20:42:55,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:42:55,035 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:42:55,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:42:55,038 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:42:55,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-20 20:43:02,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:43:02,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:43:02,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:43:02,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:43:02,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:43:02,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1017472700] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:02,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801238747] [2022-11-20 20:43:02,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:43:02,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:43:02,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:43:02,677 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:43:02,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 20:43:13,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:43:13,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:43:13,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:43:13,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:43:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:43:13,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:43:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:43:15,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801238747] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:43:15,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:43:15,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 7] total 13 [2022-11-20 20:43:15,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851223633] [2022-11-20 20:43:15,381 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:43:15,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 20:43:15,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:43:15,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 20:43:15,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:43:15,383 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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) [2022-11-20 20:43:20,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:43:26,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.99s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:43:32,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:43:38,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:43:41,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:43:41,415 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-11-20 20:43:41,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 20:43:41,416 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:43:41,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:43:41,416 INFO L225 Difference]: With dead ends: 25 [2022-11-20 20:43:41,416 INFO L226 Difference]: Without dead ends: 21 [2022-11-20 20:43:41,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2022-11-20 20:43:41,417 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 9 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:43:41,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 25 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 26 Invalid, 4 Unknown, 0 Unchecked, 23.2s Time] [2022-11-20 20:43:41,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-20 20:43:41,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-20 20:43:41,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 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) [2022-11-20 20:43:41,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-11-20 20:43:41,424 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 12 [2022-11-20 20:43:41,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:43:41,425 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-11-20 20:43:41,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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) [2022-11-20 20:43:41,425 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-11-20 20:43:41,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 20:43:41,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:43:41,427 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2022-11-20 20:43:41,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-11-20 20:43:41,830 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forcibly destroying the process [2022-11-20 20:43:41,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 137 [2022-11-20 20:43:42,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:43:42,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:42,161 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:43:42,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:43:42,162 INFO L85 PathProgramCache]: Analyzing trace with hash -2056177221, now seen corresponding path program 3 times [2022-11-20 20:43:42,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:43:42,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970351779] [2022-11-20 20:43:42,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:43:42,163 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:43:42,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:43:42,164 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:43:42,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-20 20:44:24,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-20 20:44:24,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:44:24,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:44:24,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:44:26,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:44:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:44:30,294 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:44:30,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970351779] [2022-11-20 20:44:30,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970351779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:44:30,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [405249814] [2022-11-20 20:44:30,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:44:30,295 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:44:30,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:44:30,297 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:44:30,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-20 20:45:31,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-20 20:45:31,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:45:31,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 20:45:31,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:45:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:45:32,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:45:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:45:37,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [405249814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:45:37,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29203534] [2022-11-20 20:45:37,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:45:37,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:45:37,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:45:37,390 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:45:37,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7069c46e-9f81-4012-8b12-58d56f494257/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process