./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_3_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_3_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh --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 87554a4f39ea71934805d096a19f81b20cf82924707369622052a80438a85d9f --- 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-2329fc7 [2022-12-14 14:37:22,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:37:22,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:37:22,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:37:22,906 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:37:22,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:37:22,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:37:22,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:37:22,911 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:37:22,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:37:22,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:37:22,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:37:22,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:37:22,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:37:22,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:37:22,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:37:22,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:37:22,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:37:22,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:37:22,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:37:22,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:37:22,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:37:22,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:37:22,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:37:22,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:37:22,930 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:37:22,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:37:22,932 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:37:22,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:37:22,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:37:22,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:37:22,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:37:22,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:37:22,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:37:22,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:37:22,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:37:22,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:37:22,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:37:22,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:37:22,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:37:22,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:37:22,940 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 14:37:22,959 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:37:22,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:37:22,959 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:37:22,960 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:37:22,960 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:37:22,960 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:37:22,961 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:37:22,961 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:37:22,961 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:37:22,961 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:37:22,961 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:37:22,962 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:37:22,962 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:37:22,962 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:37:22,962 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:37:22,962 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:37:22,962 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:37:22,963 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:37:22,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:37:22,963 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:37:22,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:37:22,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:37:22,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:37:22,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:37:22,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:37:22,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:37:22,964 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:37:22,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:37:22,965 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:37:22,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:37:22,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:37:22,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:37:22,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:37:22,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:37:22,966 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:37:22,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:37:22,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:37:22,966 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:37:22,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:37:22,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:37:22,967 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:37:22,967 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_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87554a4f39ea71934805d096a19f81b20cf82924707369622052a80438a85d9f [2022-12-14 14:37:23,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:37:23,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:37:23,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:37:23,185 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:37:23,185 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:37:23,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/gcd_3+newton_3_2.i [2022-12-14 14:37:25,784 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:37:25,910 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:37:25,910 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/sv-benchmarks/c/combinations/gcd_3+newton_3_2.i [2022-12-14 14:37:25,915 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/data/879051feb/a299e4d7f9564dc087b8f6736bc0b346/FLAG2f600731a [2022-12-14 14:37:26,335 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/data/879051feb/a299e4d7f9564dc087b8f6736bc0b346 [2022-12-14 14:37:26,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:37:26,338 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:37:26,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:37:26,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:37:26,342 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:37:26,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:37:26" (1/1) ... [2022-12-14 14:37:26,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@491c8870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:26, skipping insertion in model container [2022-12-14 14:37:26,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:37:26" (1/1) ... [2022-12-14 14:37:26,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:37:26,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:37:26,485 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_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/sv-benchmarks/c/combinations/gcd_3+newton_3_2.i[1226,1239] [2022-12-14 14:37:26,506 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_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/sv-benchmarks/c/combinations/gcd_3+newton_3_2.i[2862,2875] [2022-12-14 14:37:26,507 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:37:26,516 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:37:26,526 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_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/sv-benchmarks/c/combinations/gcd_3+newton_3_2.i[1226,1239] [2022-12-14 14:37:26,532 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_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/sv-benchmarks/c/combinations/gcd_3+newton_3_2.i[2862,2875] [2022-12-14 14:37:26,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:37:26,542 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:37:26,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:26 WrapperNode [2022-12-14 14:37:26,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:37:26,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:37:26,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:37:26,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:37:26,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:26" (1/1) ... [2022-12-14 14:37:26,553 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:26" (1/1) ... [2022-12-14 14:37:26,566 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 90 [2022-12-14 14:37:26,566 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:37:26,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:37:26,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:37:26,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:37:26,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:26" (1/1) ... [2022-12-14 14:37:26,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:26" (1/1) ... [2022-12-14 14:37:26,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:26" (1/1) ... [2022-12-14 14:37:26,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:26" (1/1) ... [2022-12-14 14:37:26,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:26" (1/1) ... [2022-12-14 14:37:26,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:26" (1/1) ... [2022-12-14 14:37:26,581 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:26" (1/1) ... [2022-12-14 14:37:26,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:26" (1/1) ... [2022-12-14 14:37:26,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:37:26,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:37:26,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:37:26,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:37:26,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:26" (1/1) ... [2022-12-14 14:37:26,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:37:26,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:37:26,605 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:37:26,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:37:26,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:37:26,638 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-12-14 14:37:26,638 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-12-14 14:37:26,639 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-12-14 14:37:26,639 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-12-14 14:37:26,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:37:26,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:37:26,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:37:26,693 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:37:26,694 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:37:26,812 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:37:26,858 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:37:26,858 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 14:37:26,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:37:26 BoogieIcfgContainer [2022-12-14 14:37:26,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:37:26,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:37:26,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:37:26,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:37:26,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:37:26" (1/3) ... [2022-12-14 14:37:26,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21d458f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:37:26, skipping insertion in model container [2022-12-14 14:37:26,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:26" (2/3) ... [2022-12-14 14:37:26,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21d458f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:37:26, skipping insertion in model container [2022-12-14 14:37:26,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:37:26" (3/3) ... [2022-12-14 14:37:26,867 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_3_2.i [2022-12-14 14:37:26,880 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:37:26,881 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 14:37:26,917 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:37:26,921 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;@4323c23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:37:26,922 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 14:37:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 14:37:26,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 14:37:26,930 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:37:26,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 14:37:26,931 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:37:26,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:37:26,935 INFO L85 PathProgramCache]: Analyzing trace with hash -291944571, now seen corresponding path program 1 times [2022-12-14 14:37:26,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:37:26,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806262824] [2022-12-14 14:37:26,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:26,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:37:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:37:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:37:27,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:37:27,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806262824] [2022-12-14 14:37:27,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806262824] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:37:27,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:37:27,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 14:37:27,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123927810] [2022-12-14 14:37:27,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:37:27,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:37:27,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:37:27,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:37:27,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:37:27,280 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 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) [2022-12-14 14:37:27,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:37:27,383 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2022-12-14 14:37:27,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 14:37:27,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 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) Word has length 6 [2022-12-14 14:37:27,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:37:27,391 INFO L225 Difference]: With dead ends: 48 [2022-12-14 14:37:27,391 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 14:37:27,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:37:27,395 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:37:27,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 84 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:37:27,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 14:37:27,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-12-14 14:37:27,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 14:37:27,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-12-14 14:37:27,427 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 6 [2022-12-14 14:37:27,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:37:27,428 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-12-14 14:37:27,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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) [2022-12-14 14:37:27,428 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-12-14 14:37:27,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 14:37:27,429 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:37:27,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:37:27,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:37:27,430 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:37:27,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:37:27,430 INFO L85 PathProgramCache]: Analyzing trace with hash -533010262, now seen corresponding path program 1 times [2022-12-14 14:37:27,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:37:27,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335414470] [2022-12-14 14:37:27,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:27,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:37:27,440 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 14:37:27,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054758112] [2022-12-14 14:37:27,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:27,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:27,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:37:27,442 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:37:27,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:37:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:37:27,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 14:37:27,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:37:35,122 WARN L859 $PredicateComparison]: unable to prove that (or (and (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= |c_ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |ULTIMATE.start_gcd_test_#res#1|) 256) 0) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (not (= |ULTIMATE.start_gcd_test_#res#1| 0)))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|)) (and (< |c_ULTIMATE.start_main1_~x~0#1| 0) (let ((.cse1 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse0 (<= .cse1 127))) (or (and (not .cse0) (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= |c_ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= 0 (mod (+ .cse1 (- 256)) |ULTIMATE.start_gcd_test_#res#1|)) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (not (= |ULTIMATE.start_gcd_test_#res#1| 0))))) (and .cse0 (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= |c_ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= (mod (mod .cse1 |ULTIMATE.start_gcd_test_#res#1|) 256) 0) (not (= |ULTIMATE.start_gcd_test_#res#1| 0)))))))))) is different from true [2022-12-14 14:37:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:37:35,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:37:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:37:40,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:37:40,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335414470] [2022-12-14 14:37:40,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 14:37:40,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054758112] [2022-12-14 14:37:40,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054758112] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:37:40,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [787674204] [2022-12-14 14:37:40,856 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 14:37:40,856 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:37:40,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:37:40,863 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:37:40,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:37:41,053 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:37:41,959 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '188#(and (= |ULTIMATE.start_gcd_test_~b#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~b#1| 128)) (<= |ULTIMATE.start_gcd_test_#in~a#1| 127) (< 0 |ULTIMATE.start_main1_~x~0#1|) (<= |ULTIMATE.start_gcd_test_#in~b#1| 127) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= (ite (<= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_main1_~x~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_#res#1|) (<= |ULTIMATE.start_main1_~y~0#1| 127) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_main1_~y~0#1| 128)) (= |#NULL.base| 0))' at error location [2022-12-14 14:37:41,959 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:37:41,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:37:41,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-12-14 14:37:41,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843431912] [2022-12-14 14:37:41,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 14:37:41,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 14:37:41,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:37:41,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 14:37:41,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=146, Unknown=2, NotChecked=24, Total=210 [2022-12-14 14:37:41,962 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 10 states, 10 states have (on average 1.2) internal successors, (12), 10 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) [2022-12-14 14:37:44,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 14:38:03,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:38:03,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 139 [2022-12-14 14:38:03,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=38, Invalid=146, Unknown=2, NotChecked=24, Total=210 [2022-12-14 14:38:03,643 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:38:03,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 5 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 1 Unknown, 5 Unchecked, 4.3s Time] [2022-12-14 14:38:03,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-14 14:38:03,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:38:03,846 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:625) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:361) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:391) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:230) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 55 more [2022-12-14 14:38:03,856 INFO L158 Benchmark]: Toolchain (without parser) took 37517.51ms. Allocated memory is still 167.8MB. Free memory was 129.1MB in the beginning and 121.7MB in the end (delta: 7.4MB). Peak memory consumption was 6.7MB. Max. memory is 16.1GB. [2022-12-14 14:38:03,856 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 109.1MB. Free memory is still 78.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 14:38:03,856 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.01ms. Allocated memory is still 167.8MB. Free memory was 129.1MB in the beginning and 134.1MB in the end (delta: -5.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-12-14 14:38:03,857 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.22ms. Allocated memory is still 167.8MB. Free memory was 134.1MB in the beginning and 132.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 14:38:03,857 INFO L158 Benchmark]: Boogie Preprocessor took 16.23ms. Allocated memory is still 167.8MB. Free memory was 132.8MB in the beginning and 131.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 14:38:03,857 INFO L158 Benchmark]: RCFGBuilder took 277.18ms. Allocated memory is still 167.8MB. Free memory was 131.5MB in the beginning and 115.3MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-14 14:38:03,858 INFO L158 Benchmark]: TraceAbstraction took 36993.00ms. Allocated memory is still 167.8MB. Free memory was 114.7MB in the beginning and 121.7MB in the end (delta: -7.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 14:38:03,859 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 109.1MB. Free memory is still 78.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 203.01ms. Allocated memory is still 167.8MB. Free memory was 129.1MB in the beginning and 134.1MB in the end (delta: -5.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.22ms. Allocated memory is still 167.8MB. Free memory was 134.1MB in the beginning and 132.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.23ms. Allocated memory is still 167.8MB. Free memory was 132.8MB in the beginning and 131.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 277.18ms. Allocated memory is still 167.8MB. Free memory was 131.5MB in the beginning and 115.3MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 36993.00ms. Allocated memory is still 167.8MB. Free memory was 114.7MB in the beginning and 121.7MB in the end (delta: -7.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_3_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh --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 87554a4f39ea71934805d096a19f81b20cf82924707369622052a80438a85d9f --- 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-2329fc7 [2022-12-14 14:38:05,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:38:05,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:38:05,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:38:05,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:38:05,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:38:05,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:38:05,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:38:05,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:38:05,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:38:05,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:38:05,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:38:05,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:38:05,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:38:05,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:38:05,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:38:05,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:38:05,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:38:05,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:38:05,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:38:05,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:38:05,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:38:05,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:38:05,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:38:05,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:38:05,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:38:05,275 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:38:05,276 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:38:05,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:38:05,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:38:05,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:38:05,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:38:05,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:38:05,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:38:05,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:38:05,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:38:05,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:38:05,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:38:05,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:38:05,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:38:05,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:38:05,292 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-12-14 14:38:05,316 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:38:05,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:38:05,317 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:38:05,317 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:38:05,318 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:38:05,318 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:38:05,318 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:38:05,318 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:38:05,318 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:38:05,319 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:38:05,319 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:38:05,319 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:38:05,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:38:05,320 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:38:05,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:38:05,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:38:05,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:38:05,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:38:05,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:38:05,320 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 14:38:05,321 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 14:38:05,321 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 14:38:05,321 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:38:05,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:38:05,321 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:38:05,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:38:05,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:38:05,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 14:38:05,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:38:05,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:38:05,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:38:05,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:38:05,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:38:05,322 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 14:38:05,322 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 14:38:05,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:38:05,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:38:05,323 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 14:38:05,323 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_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87554a4f39ea71934805d096a19f81b20cf82924707369622052a80438a85d9f [2022-12-14 14:38:05,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:38:05,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:38:05,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:38:05,567 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:38:05,567 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:38:05,568 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/gcd_3+newton_3_2.i [2022-12-14 14:38:08,161 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:38:08,313 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:38:08,314 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/sv-benchmarks/c/combinations/gcd_3+newton_3_2.i [2022-12-14 14:38:08,321 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/data/c0277bd8d/100dc27526114ee5a07dd9e1379bf9bf/FLAGc380f32fd [2022-12-14 14:38:08,336 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/data/c0277bd8d/100dc27526114ee5a07dd9e1379bf9bf [2022-12-14 14:38:08,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:38:08,340 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:38:08,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:38:08,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:38:08,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:38:08,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:38:08" (1/1) ... [2022-12-14 14:38:08,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20644520 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:08, skipping insertion in model container [2022-12-14 14:38:08,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:38:08" (1/1) ... [2022-12-14 14:38:08,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:38:08,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:38:08,494 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_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/sv-benchmarks/c/combinations/gcd_3+newton_3_2.i[1226,1239] [2022-12-14 14:38:08,512 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_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/sv-benchmarks/c/combinations/gcd_3+newton_3_2.i[2862,2875] [2022-12-14 14:38:08,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:38:08,524 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:38:08,534 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_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/sv-benchmarks/c/combinations/gcd_3+newton_3_2.i[1226,1239] [2022-12-14 14:38:08,542 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_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/sv-benchmarks/c/combinations/gcd_3+newton_3_2.i[2862,2875] [2022-12-14 14:38:08,542 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:38:08,554 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:38:08,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:08 WrapperNode [2022-12-14 14:38:08,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:38:08,556 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:38:08,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:38:08,556 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:38:08,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:08" (1/1) ... [2022-12-14 14:38:08,568 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:08" (1/1) ... [2022-12-14 14:38:08,583 INFO L138 Inliner]: procedures = 28, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 85 [2022-12-14 14:38:08,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:38:08,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:38:08,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:38:08,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:38:08,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:08" (1/1) ... [2022-12-14 14:38:08,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:08" (1/1) ... [2022-12-14 14:38:08,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:08" (1/1) ... [2022-12-14 14:38:08,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:08" (1/1) ... [2022-12-14 14:38:08,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:08" (1/1) ... [2022-12-14 14:38:08,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:08" (1/1) ... [2022-12-14 14:38:08,603 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:08" (1/1) ... [2022-12-14 14:38:08,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:08" (1/1) ... [2022-12-14 14:38:08,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:38:08,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:38:08,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:38:08,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:38:08,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:08" (1/1) ... [2022-12-14 14:38:08,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:38:08,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:38:08,631 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:38:08,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:38:08,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:38:08,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 14:38:08,667 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-12-14 14:38:08,667 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-12-14 14:38:08,667 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-12-14 14:38:08,667 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-12-14 14:38:08,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:38:08,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:38:08,729 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:38:08,731 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:38:19,779 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:38:19,786 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:38:19,786 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 14:38:19,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:38:19 BoogieIcfgContainer [2022-12-14 14:38:19,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:38:19,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:38:19,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:38:19,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:38:19,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:38:08" (1/3) ... [2022-12-14 14:38:19,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587fb3e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:38:19, skipping insertion in model container [2022-12-14 14:38:19,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:08" (2/3) ... [2022-12-14 14:38:19,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587fb3e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:38:19, skipping insertion in model container [2022-12-14 14:38:19,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:38:19" (3/3) ... [2022-12-14 14:38:19,796 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_3_2.i [2022-12-14 14:38:19,814 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:38:19,815 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 14:38:19,852 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:38:19,857 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;@7ef5394a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:38:19,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 14:38:19,860 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 14:38:19,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 14:38:19,865 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:38:19,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:38:19,866 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:38:19,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:38:19,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-12-14 14:38:19,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:38:19,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806556708] [2022-12-14 14:38:19,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:38:19,880 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 [2022-12-14 14:38:19,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:38:19,881 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/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) [2022-12-14 14:38:19,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/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 [2022-12-14 14:38:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:38:19,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:38:19,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:38:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:38:20,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:38:20,060 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:38:20,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806556708] [2022-12-14 14:38:20,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806556708] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:38:20,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:38:20,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:38:20,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342087519] [2022-12-14 14:38:20,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:38:20,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:38:20,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:38:20,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:38:20,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:38:20,096 INFO L87 Difference]: Start difference. First operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-12-14 14:38:20,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:38:20,168 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2022-12-14 14:38:20,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:38:20,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 11 [2022-12-14 14:38:20,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:38:20,181 INFO L225 Difference]: With dead ends: 74 [2022-12-14 14:38:20,182 INFO L226 Difference]: Without dead ends: 33 [2022-12-14 14:38:20,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:38:20,187 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:38:20,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 90 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:38:20,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-12-14 14:38:20,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-12-14 14:38:20,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 14:38:20,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-12-14 14:38:20,221 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 11 [2022-12-14 14:38:20,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:38:20,221 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-12-14 14:38:20,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-12-14 14:38:20,222 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-12-14 14:38:20,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 14:38:20,223 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:38:20,223 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:38:20,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/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)] Forceful destruction successful, exit code 0 [2022-12-14 14:38:20,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/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 [2022-12-14 14:38:20,425 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:38:20,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:38:20,428 INFO L85 PathProgramCache]: Analyzing trace with hash 65622039, now seen corresponding path program 1 times [2022-12-14 14:38:20,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:38:20,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104538754] [2022-12-14 14:38:20,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:38:20,432 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 [2022-12-14 14:38:20,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:38:20,437 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/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) [2022-12-14 14:38:20,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/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 [2022-12-14 14:38:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:38:20,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 14:38:20,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:38:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:38:20,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:38:20,614 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:38:20,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104538754] [2022-12-14 14:38:20,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104538754] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:38:20,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:38:20,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:38:20,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384138552] [2022-12-14 14:38:20,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:38:20,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:38:20,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:38:20,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:38:20,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:38:20,616 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-12-14 14:38:20,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:38:20,743 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-12-14 14:38:20,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:38:20,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 11 [2022-12-14 14:38:20,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:38:20,745 INFO L225 Difference]: With dead ends: 49 [2022-12-14 14:38:20,745 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 14:38:20,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:38:20,747 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:38:20,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 103 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:38:20,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 14:38:20,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-12-14 14:38:20,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 14:38:20,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-12-14 14:38:20,755 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2022-12-14 14:38:20,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:38:20,756 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-12-14 14:38:20,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-12-14 14:38:20,756 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-12-14 14:38:20,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 14:38:20,757 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:38:20,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:38:20,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/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 [2022-12-14 14:38:20,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/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 [2022-12-14 14:38:20,959 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:38:20,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:38:20,961 INFO L85 PathProgramCache]: Analyzing trace with hash -743724587, now seen corresponding path program 1 times [2022-12-14 14:38:20,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:38:20,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538159295] [2022-12-14 14:38:20,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:38:20,963 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 [2022-12-14 14:38:20,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:38:20,966 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/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) [2022-12-14 14:38:20,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/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 (4)] Waiting until timeout for monitored process [2022-12-14 14:38:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:38:21,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 14:38:21,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:38:21,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:38:21,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:38:21,454 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:38:21,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538159295] [2022-12-14 14:38:21,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538159295] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:38:21,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:38:21,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 14:38:21,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005331559] [2022-12-14 14:38:21,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:38:21,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 14:38:21,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:38:21,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 14:38:21,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:38:21,456 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) 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) [2022-12-14 14:38:22,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:38:22,001 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-12-14 14:38:22,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 14:38:22,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) 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 11 [2022-12-14 14:38:22,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:38:22,003 INFO L225 Difference]: With dead ends: 40 [2022-12-14 14:38:22,003 INFO L226 Difference]: Without dead ends: 34 [2022-12-14 14:38:22,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-14 14:38:22,004 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:38:22,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 185 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:38:22,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-14 14:38:22,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-12-14 14:38:22,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 14:38:22,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-12-14 14:38:22,009 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2022-12-14 14:38:22,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:38:22,009 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-12-14 14:38:22,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) 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) [2022-12-14 14:38:22,009 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-12-14 14:38:22,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 14:38:22,010 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:38:22,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:38:22,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/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 (4)] Ended with exit code 0 [2022-12-14 14:38:22,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/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 [2022-12-14 14:38:22,211 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:38:22,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:38:22,213 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2022-12-14 14:38:22,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:38:22,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443539836] [2022-12-14 14:38:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:38:22,215 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 [2022-12-14 14:38:22,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:38:22,218 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/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) [2022-12-14 14:38:22,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/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 (5)] Waiting until timeout for monitored process [2022-12-14 14:38:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:38:22,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 14:38:22,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:38:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:38:24,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:38:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:38:42,366 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:38:42,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443539836] [2022-12-14 14:38:42,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [443539836] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:38:42,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1130014073] [2022-12-14 14:38:42,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:38:42,367 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:38:42,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:38:42,368 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:38:42,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-12-14 14:38:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:38:42,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 14:38:42,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:38:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:38:53,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:39:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:39:04,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1130014073] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:39:04,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515289983] [2022-12-14 14:39:04,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:39:04,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:39:04,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:39:04,473 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:39:04,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 14:39:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:39:04,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 14:39:04,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:39:16,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:39:16,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:39:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:39:17,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515289983] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:39:17,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 14:39:17,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 9, 9] total 28 [2022-12-14 14:39:17,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945655682] [2022-12-14 14:39:17,284 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 14:39:17,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 14:39:17,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:39:17,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 14:39:17,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=611, Unknown=11, NotChecked=0, Total=756 [2022-12-14 14:39:17,285 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:27,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:39:29,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 14:39:31,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 14:39:33,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 14:39:44,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 14:39:45,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-14 14:39:47,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-14 14:39:51,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-14 14:39:59,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:41:15,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:41:15,010 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-12-14 14:41:15,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 14:41:15,017 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 14:41:15,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:41:15,017 INFO L225 Difference]: With dead ends: 57 [2022-12-14 14:41:15,018 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 14:41:15,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 147.4s TimeCoverageRelationStatistics Valid=448, Invalid=1501, Unknown=31, NotChecked=0, Total=1980 [2022-12-14 14:41:15,020 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 90 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:41:15,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 305 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 144 Invalid, 2 Unknown, 0 Unchecked, 20.3s Time] [2022-12-14 14:41:15,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 14:41:15,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2022-12-14 14:41:15,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 14:41:15,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-12-14 14:41:15,027 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 12 [2022-12-14 14:41:15,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:41:15,028 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-12-14 14:41:15,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:41:15,028 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-12-14 14:41:15,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 14:41:15,029 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:41:15,029 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:41:15,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/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 (5)] Forceful destruction successful, exit code 0 [2022-12-14 14:41:15,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 14:41:15,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2022-12-14 14:41:15,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 14:41:15,632 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:41:15,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:41:15,633 INFO L85 PathProgramCache]: Analyzing trace with hash 571830174, now seen corresponding path program 2 times [2022-12-14 14:41:15,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:41:15,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101112579] [2022-12-14 14:41:15,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 14:41:15,635 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 [2022-12-14 14:41:15,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:41:15,636 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/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) [2022-12-14 14:41:15,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/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 (8)] Waiting until timeout for monitored process [2022-12-14 14:41:38,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 14:41:38,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:41:38,588 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 14:41:38,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:43:42,271 WARN L233 SmtUtils]: Spent 10.47s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:44:01,278 WARN L837 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~x~0#1| (_ BitVec 8)) (|v_ULTIMATE.start_gcd_test_~b#1_23| (_ BitVec 8))) (let ((.cse3 ((_ sign_extend 24) |v_ULTIMATE.start_gcd_test_~b#1_23|))) (let ((.cse1 ((_ sign_extend 24) |ULTIMATE.start_main1_~x~0#1|)) (.cse6 ((_ sign_extend 24) ((_ extract 7 0) (bvneg .cse3))))) (let ((.cse5 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse1 .cse6))))) (let ((.cse4 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse6 .cse5))))) (let ((.cse0 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse5 .cse4))))) (let ((.cse2 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse4 .cse0))))) (and (not (= .cse0 (_ bv0 32))) (not (bvslt .cse1 (_ bv0 32))) (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse2))) (_ bv0 32)) (not (bvsge .cse1 .cse2)) (bvslt .cse3 (_ bv0 32)))))))))) is different from false [2022-12-14 14:44:03,299 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~x~0#1| (_ BitVec 8)) (|v_ULTIMATE.start_gcd_test_~b#1_23| (_ BitVec 8))) (let ((.cse3 ((_ sign_extend 24) |v_ULTIMATE.start_gcd_test_~b#1_23|))) (let ((.cse1 ((_ sign_extend 24) |ULTIMATE.start_main1_~x~0#1|)) (.cse6 ((_ sign_extend 24) ((_ extract 7 0) (bvneg .cse3))))) (let ((.cse5 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse1 .cse6))))) (let ((.cse4 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse6 .cse5))))) (let ((.cse0 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse5 .cse4))))) (let ((.cse2 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse4 .cse0))))) (and (not (= .cse0 (_ bv0 32))) (not (bvslt .cse1 (_ bv0 32))) (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse2))) (_ bv0 32)) (not (bvsge .cse1 .cse2)) (bvslt .cse3 (_ bv0 32)))))))))) is different from true [2022-12-14 14:44:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:44:03,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:48:39,767 WARN L233 SmtUtils]: Spent 5.85s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:49:01,627 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_gcd_test_~b#1| (_ BitVec 8)) (|v_ULTIMATE.start_main1_~x~0#1_8| (_ BitVec 8))) (let ((.cse2 ((_ sign_extend 24) |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse0 ((_ sign_extend 24) |v_ULTIMATE.start_main1_~x~0#1_8|)) (.cse6 ((_ sign_extend 24) ((_ extract 7 0) (bvneg .cse2))))) (let ((.cse5 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse6))))) (let ((.cse4 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse6 .cse5))))) (let ((.cse3 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse5 .cse4))))) (let ((.cse1 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse4 .cse3))))) (or (bvslt .cse0 (_ bv0 32)) (bvsge .cse0 .cse1) (not (bvslt .cse2 (_ bv0 32))) (not (= (_ bv0 32) ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse3 .cse1))))) (= .cse3 (_ bv0 32)))))))))) is different from false [2022-12-14 14:49:03,663 WARN L859 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_gcd_test_~b#1| (_ BitVec 8)) (|v_ULTIMATE.start_main1_~x~0#1_8| (_ BitVec 8))) (let ((.cse2 ((_ sign_extend 24) |ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse0 ((_ sign_extend 24) |v_ULTIMATE.start_main1_~x~0#1_8|)) (.cse6 ((_ sign_extend 24) ((_ extract 7 0) (bvneg .cse2))))) (let ((.cse5 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse6))))) (let ((.cse4 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse6 .cse5))))) (let ((.cse3 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse5 .cse4))))) (let ((.cse1 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse4 .cse3))))) (or (bvslt .cse0 (_ bv0 32)) (bvsge .cse0 .cse1) (not (bvslt .cse2 (_ bv0 32))) (not (= (_ bv0 32) ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse3 .cse1))))) (= .cse3 (_ bv0 32)))))))))) is different from true [2022-12-14 14:49:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:49:21,466 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:49:21,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101112579] [2022-12-14 14:49:21,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101112579] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:49:21,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1694791050] [2022-12-14 14:49:21,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 14:49:21,467 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:49:21,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:49:21,468 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:49:21,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a839a49-1d8c-4b66-8854-c0fbeb1bdf6f/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-12-14 14:49:21,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 14:49:21,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:49:21,949 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 14:49:21,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:52:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:52:22,123 INFO L328 TraceCheckSpWp]: Computing backward predicates...