./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/underapprox_2-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_2-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS --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 dc138f274319e5e58145eabf3fb84043b6d1bd3c616751e51efeb5e2ee2997a6 --- 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-8393723 [2022-11-19 07:00:34,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:00:34,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:00:34,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:00:34,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:00:34,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:00:34,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:00:34,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:00:34,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:00:34,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:00:34,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:00:34,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:00:34,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:00:34,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:00:34,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:00:34,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:00:34,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:00:34,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:00:34,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:00:34,865 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:00:34,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:00:34,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:00:34,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:00:34,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:00:34,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:00:34,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:00:34,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:00:34,889 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:00:34,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:00:34,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:00:34,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:00:34,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:00:34,893 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:00:34,894 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:00:34,895 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:00:34,895 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:00:34,896 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:00:34,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:00:34,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:00:34,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:00:34,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:00:34,900 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:00:34,925 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:00:34,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:00:34,926 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:00:34,926 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:00:34,927 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:00:34,928 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:00:34,928 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:00:34,928 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:00:34,928 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:00:34,929 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:00:34,929 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:00:34,929 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:00:34,930 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:00:34,930 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:00:34,930 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:00:34,930 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:00:34,931 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:00:34,931 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:00:34,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:00:34,932 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:00:34,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:00:34,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:00:34,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:00:34,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:00:34,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:00:34,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:00:34,934 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:00:34,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:00:34,934 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:00:34,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:00:34,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:00:34,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:00:34,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:00:34,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:00:34,936 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:00:34,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:00:34,936 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:00:34,937 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:00:34,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:00:34,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:00:34,937 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:00:34,938 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_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dc138f274319e5e58145eabf3fb84043b6d1bd3c616751e51efeb5e2ee2997a6 [2022-11-19 07:00:35,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:00:35,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:00:35,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:00:35,263 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:00:35,264 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:00:35,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/loop-acceleration/underapprox_2-1.c [2022-11-19 07:00:35,353 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/data/a2036077e/99b8994a396f4cf68c9b05d687b3bb83/FLAG0e1a6ed63 [2022-11-19 07:00:36,011 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:00:36,013 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/sv-benchmarks/c/loop-acceleration/underapprox_2-1.c [2022-11-19 07:00:36,020 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/data/a2036077e/99b8994a396f4cf68c9b05d687b3bb83/FLAG0e1a6ed63 [2022-11-19 07:00:36,373 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/data/a2036077e/99b8994a396f4cf68c9b05d687b3bb83 [2022-11-19 07:00:36,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:00:36,377 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:00:36,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:00:36,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:00:36,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:00:36,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:00:36" (1/1) ... [2022-11-19 07:00:36,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a377fd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:36, skipping insertion in model container [2022-11-19 07:00:36,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:00:36" (1/1) ... [2022-11-19 07:00:36,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:00:36,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:00:36,636 WARN L234 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_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/sv-benchmarks/c/loop-acceleration/underapprox_2-1.c[327,340] [2022-11-19 07:00:36,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:00:36,669 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:00:36,682 WARN L234 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_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/sv-benchmarks/c/loop-acceleration/underapprox_2-1.c[327,340] [2022-11-19 07:00:36,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:00:36,701 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:00:36,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:36 WrapperNode [2022-11-19 07:00:36,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:00:36,703 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:00:36,704 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:00:36,704 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:00:36,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:36" (1/1) ... [2022-11-19 07:00:36,720 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:36" (1/1) ... [2022-11-19 07:00:36,742 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2022-11-19 07:00:36,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:00:36,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:00:36,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:00:36,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:00:36,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:36" (1/1) ... [2022-11-19 07:00:36,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:36" (1/1) ... [2022-11-19 07:00:36,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:36" (1/1) ... [2022-11-19 07:00:36,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:36" (1/1) ... [2022-11-19 07:00:36,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:36" (1/1) ... [2022-11-19 07:00:36,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:36" (1/1) ... [2022-11-19 07:00:36,765 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:36" (1/1) ... [2022-11-19 07:00:36,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:36" (1/1) ... [2022-11-19 07:00:36,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:00:36,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:00:36,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:00:36,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:00:36,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:36" (1/1) ... [2022-11-19 07:00:36,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:00:36,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:36,810 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:00:36,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:00:36,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:00:36,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:00:36,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:00:36,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:00:36,930 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:00:36,933 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:00:37,112 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:00:37,159 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:00:37,159 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:00:37,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:00:37 BoogieIcfgContainer [2022-11-19 07:00:37,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:00:37,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:00:37,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:00:37,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:00:37,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:00:36" (1/3) ... [2022-11-19 07:00:37,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a21c378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:00:37, skipping insertion in model container [2022-11-19 07:00:37,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:00:36" (2/3) ... [2022-11-19 07:00:37,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a21c378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:00:37, skipping insertion in model container [2022-11-19 07:00:37,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:00:37" (3/3) ... [2022-11-19 07:00:37,177 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2022-11-19 07:00:37,201 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:00:37,201 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:00:37,288 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:00:37,306 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;@5dceb1bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:00:37,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:00:37,312 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) [2022-11-19 07:00:37,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 07:00:37,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:37,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 07:00:37,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:00:37,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:37,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1850503, now seen corresponding path program 1 times [2022-11-19 07:00:37,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:37,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243115821] [2022-11-19 07:00:37,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:37,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:00:37,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:37,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243115821] [2022-11-19 07:00:37,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243115821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:37,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:00:37,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:00:37,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809279682] [2022-11-19 07:00:37,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:37,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:00:37,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:37,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:00:37,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:00:37,900 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 4 states, 4 states have (on average 1.0) internal successors, (4), 3 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) [2022-11-19 07:00:37,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:37,941 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2022-11-19 07:00:37,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:00:37,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 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 [2022-11-19 07:00:37,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:37,954 INFO L225 Difference]: With dead ends: 13 [2022-11-19 07:00:37,954 INFO L226 Difference]: Without dead ends: 6 [2022-11-19 07:00:37,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:00:37,963 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:37,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 7 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:00:37,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2022-11-19 07:00:37,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2022-11-19 07:00:38,000 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) [2022-11-19 07:00:38,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2022-11-19 07:00:38,002 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2022-11-19 07:00:38,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:38,003 INFO L495 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2022-11-19 07:00:38,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 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) [2022-11-19 07:00:38,003 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2022-11-19 07:00:38,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:00:38,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:38,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:00:38,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:00:38,005 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:00:38,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:38,006 INFO L85 PathProgramCache]: Analyzing trace with hash 56695734, now seen corresponding path program 1 times [2022-11-19 07:00:38,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:38,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994225467] [2022-11-19 07:00:38,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:38,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:00:38,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:38,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994225467] [2022-11-19 07:00:38,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994225467] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:00:38,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031458347] [2022-11-19 07:00:38,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:38,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:38,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:38,205 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:00:38,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:00:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:38,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:00:38,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:00:38,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:00:38,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031458347] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:00:38,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2063384443] [2022-11-19 07:00:38,422 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-19 07:00:38,423 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:00:38,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:00:38,435 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:00:38,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:00:38,726 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:00:38,864 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '71#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (= (ite (not (= 6 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:00:38,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:00:38,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:00:38,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2022-11-19 07:00:38,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359331349] [2022-11-19 07:00:38,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:00:38,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:00:38,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:38,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:00:38,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:00:38,869 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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) [2022-11-19 07:00:38,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:38,951 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2022-11-19 07:00:38,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:00:38,952 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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 [2022-11-19 07:00:38,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:38,953 INFO L225 Difference]: With dead ends: 13 [2022-11-19 07:00:38,953 INFO L226 Difference]: Without dead ends: 9 [2022-11-19 07:00:38,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:00:38,956 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:38,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 7 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:00:38,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-19 07:00:38,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-19 07:00:38,961 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) [2022-11-19 07:00:38,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-19 07:00:38,962 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-19 07:00:38,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:38,962 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-19 07:00:38,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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) [2022-11-19 07:00:38,963 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-19 07:00:38,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:00:38,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:38,964 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2022-11-19 07:00:38,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:39,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:39,171 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:00:39,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:39,171 INFO L85 PathProgramCache]: Analyzing trace with hash 435294279, now seen corresponding path program 2 times [2022-11-19 07:00:39,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:39,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630699737] [2022-11-19 07:00:39,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:39,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:39,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:00:39,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:39,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630699737] [2022-11-19 07:00:39,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630699737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:00:39,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776390988] [2022-11-19 07:00:39,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:00:39,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:39,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:39,490 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:00:39,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:00:39,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:00:39,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:00:39,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:00:39,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:00:39,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:00:39,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776390988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:00:39,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1876221655] [2022-11-19 07:00:39,848 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-19 07:00:39,848 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:00:39,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:00:39,849 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:00:39,849 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:00:39,974 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:00:40,214 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '166#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (= (ite (not (= 6 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:00:40,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:00:40,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:00:40,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2022-11-19 07:00:40,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073965555] [2022-11-19 07:00:40,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:00:40,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:00:40,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:40,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:00:40,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:00:40,217 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:40,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:40,837 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2022-11-19 07:00:40,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:00:40,838 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 07:00:40,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:40,838 INFO L225 Difference]: With dead ends: 19 [2022-11-19 07:00:40,838 INFO L226 Difference]: Without dead ends: 15 [2022-11-19 07:00:40,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:00:40,840 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 21 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:40,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 11 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:00:40,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-19 07:00:40,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-19 07:00:40,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 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) [2022-11-19 07:00:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-19 07:00:40,848 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2022-11-19 07:00:40,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:40,848 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-19 07:00:40,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:00:40,849 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-19 07:00:40,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:00:40,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:40,852 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2022-11-19 07:00:40,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 07:00:41,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:41,057 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:00:41,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:41,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1684538919, now seen corresponding path program 3 times [2022-11-19 07:00:41,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:41,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854725935] [2022-11-19 07:00:41,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:41,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:00:41,075 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 07:00:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:00:41,100 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 07:00:41,100 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 07:00:41,102 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 07:00:41,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:00:41,108 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1] [2022-11-19 07:00:41,115 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 07:00:41,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:00:41 BoogieIcfgContainer [2022-11-19 07:00:41,167 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 07:00:41,168 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 07:00:41,168 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 07:00:41,168 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 07:00:41,169 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:00:37" (3/4) ... [2022-11-19 07:00:41,171 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-19 07:00:41,211 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 07:00:41,211 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 07:00:41,212 INFO L158 Benchmark]: Toolchain (without parser) took 4835.15ms. Allocated memory was 132.1MB in the beginning and 180.4MB in the end (delta: 48.2MB). Free memory was 100.6MB in the beginning and 155.4MB in the end (delta: -54.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:00:41,213 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 88.1MB. Free memory was 43.4MB in the beginning and 43.3MB in the end (delta: 43.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:00:41,213 INFO L158 Benchmark]: CACSL2BoogieTranslator took 321.82ms. Allocated memory is still 132.1MB. Free memory was 100.3MB in the beginning and 107.9MB in the end (delta: -7.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 07:00:41,214 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.53ms. Allocated memory is still 132.1MB. Free memory was 107.9MB in the beginning and 106.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:00:41,214 INFO L158 Benchmark]: Boogie Preprocessor took 24.18ms. Allocated memory is still 132.1MB. Free memory was 106.6MB in the beginning and 105.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:00:41,215 INFO L158 Benchmark]: RCFGBuilder took 394.08ms. Allocated memory is still 132.1MB. Free memory was 105.5MB in the beginning and 94.6MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-19 07:00:41,215 INFO L158 Benchmark]: TraceAbstraction took 4000.22ms. Allocated memory was 132.1MB in the beginning and 180.4MB in the end (delta: 48.2MB). Free memory was 93.9MB in the beginning and 156.5MB in the end (delta: -62.5MB). Peak memory consumption was 57.1MB. Max. memory is 16.1GB. [2022-11-19 07:00:41,216 INFO L158 Benchmark]: Witness Printer took 43.65ms. Allocated memory is still 180.4MB. Free memory was 156.5MB in the beginning and 155.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:00:41,218 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 88.1MB. Free memory was 43.4MB in the beginning and 43.3MB in the end (delta: 43.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 321.82ms. Allocated memory is still 132.1MB. Free memory was 100.3MB in the beginning and 107.9MB in the end (delta: -7.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.53ms. Allocated memory is still 132.1MB. Free memory was 107.9MB in the beginning and 106.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.18ms. Allocated memory is still 132.1MB. Free memory was 106.6MB in the beginning and 105.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 394.08ms. Allocated memory is still 132.1MB. Free memory was 105.5MB in the beginning and 94.6MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 4000.22ms. Allocated memory was 132.1MB in the beginning and 180.4MB in the end (delta: 48.2MB). Free memory was 93.9MB in the beginning and 156.5MB in the end (delta: -62.5MB). Peak memory consumption was 57.1MB. Max. memory is 16.1GB. * Witness Printer took 43.65ms. Allocated memory is still 180.4MB. Free memory was 156.5MB in the beginning and 155.4MB in the end (delta: 1.0MB). 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 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L13] unsigned int x = 0; [L14] unsigned int y = 1; VAL [x=0, y=1] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=1, y=2] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=2, y=4] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=3, y=8] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=4, y=16] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=5, y=32] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=6, y=64] [L16] COND FALSE !(x < 6) [L21] CALL __VERIFIER_assert(x != 6) [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] 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: 3.8s, OverallIterations: 4, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 27 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 27 mSDsluCounter, 25 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 18 mSDsCounter, 32 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 83 IncrementalHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 32 mSolverCounterUnsat, 7 mSDtfsCounter, 83 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=3, InterpolantAutomatonStates: 26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 172 SizeOfPredicates, 4 NumberOfNonLiveVariables, 99 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 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 proved your program to be incorrect! [2022-11-19 07:00:41,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfcba63e-ae44-4aa6-be58-0c1ea9d4bac7/bin/utaipan-I9t0OCRTmS/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 Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE