./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/add-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/add-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7202e877c1332442c2c226005d8bd7e5f4094e339ca214931497ee0f3766da6a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:26:33,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:26:33,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:26:33,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:26:33,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:26:33,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:26:33,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:26:33,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:26:33,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:26:33,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:26:33,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:26:33,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:26:33,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:26:33,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:26:33,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:26:33,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:26:33,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:26:33,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:26:33,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:26:33,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:26:33,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:26:33,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:26:33,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:26:33,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:26:33,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:26:33,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:26:33,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:26:33,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:26:33,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:26:33,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:26:33,927 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:26:33,928 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:26:33,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:26:33,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:26:33,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:26:33,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:26:33,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:26:33,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:26:33,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:26:33,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:26:33,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:26:33,939 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:26:33,986 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:26:33,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:26:33,987 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:26:33,988 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:26:33,988 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:26:33,989 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:26:33,989 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:26:33,989 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:26:33,989 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:26:33,989 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:26:33,990 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:26:33,991 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:26:33,991 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:26:33,991 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:26:33,991 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:26:33,991 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:26:33,992 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:26:33,992 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:26:33,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:26:33,993 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:26:33,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:26:33,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:26:33,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:26:33,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:26:33,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:26:33,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:26:33,995 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:26:33,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:26:33,996 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:26:33,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:26:33,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:26:33,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:26:33,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:26:33,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:26:33,997 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:26:33,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:26:33,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:26:33,998 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:26:33,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:26:33,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:26:33,999 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:26:33,999 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_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7202e877c1332442c2c226005d8bd7e5f4094e339ca214931497ee0f3766da6a [2022-11-19 08:26:34,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:26:34,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:26:34,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:26:34,333 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:26:34,333 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:26:34,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-multidimensional/add-2-n-u.c [2022-11-19 08:26:34,402 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/data/221995114/66ec9396a8d6459d9cc65c2e72cd0f92/FLAG1d77adb54 [2022-11-19 08:26:34,924 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:26:34,925 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/sv-benchmarks/c/array-multidimensional/add-2-n-u.c [2022-11-19 08:26:34,930 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/data/221995114/66ec9396a8d6459d9cc65c2e72cd0f92/FLAG1d77adb54 [2022-11-19 08:26:35,315 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/data/221995114/66ec9396a8d6459d9cc65c2e72cd0f92 [2022-11-19 08:26:35,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:26:35,321 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:26:35,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:26:35,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:26:35,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:26:35,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:26:35" (1/1) ... [2022-11-19 08:26:35,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d079b3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:35, skipping insertion in model container [2022-11-19 08:26:35,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:26:35" (1/1) ... [2022-11-19 08:26:35,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:26:35,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:26:35,537 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/sv-benchmarks/c/array-multidimensional/add-2-n-u.c[321,334] [2022-11-19 08:26:35,558 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:26:35,565 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:26:35,578 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/sv-benchmarks/c/array-multidimensional/add-2-n-u.c[321,334] [2022-11-19 08:26:35,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:26:35,601 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:26:35,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:35 WrapperNode [2022-11-19 08:26:35,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:26:35,603 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:26:35,603 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:26:35,603 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:26:35,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:35" (1/1) ... [2022-11-19 08:26:35,631 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:35" (1/1) ... [2022-11-19 08:26:35,664 INFO L138 Inliner]: procedures = 14, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2022-11-19 08:26:35,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:26:35,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:26:35,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:26:35,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:26:35,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:35" (1/1) ... [2022-11-19 08:26:35,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:35" (1/1) ... [2022-11-19 08:26:35,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:35" (1/1) ... [2022-11-19 08:26:35,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:35" (1/1) ... [2022-11-19 08:26:35,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:35" (1/1) ... [2022-11-19 08:26:35,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:35" (1/1) ... [2022-11-19 08:26:35,702 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:35" (1/1) ... [2022-11-19 08:26:35,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:35" (1/1) ... [2022-11-19 08:26:35,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:26:35,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:26:35,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:26:35,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:26:35,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:35" (1/1) ... [2022-11-19 08:26:35,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:26:35,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:26:35,749 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:26:35,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:26:35,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:26:35,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:26:35,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:26:35,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:26:35,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:26:35,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:26:35,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:26:35,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:26:35,894 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:26:35,897 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:26:36,162 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:26:36,228 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:26:36,228 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-19 08:26:36,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:26:36 BoogieIcfgContainer [2022-11-19 08:26:36,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:26:36,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:26:36,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:26:36,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:26:36,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:26:35" (1/3) ... [2022-11-19 08:26:36,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@403781b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:26:36, skipping insertion in model container [2022-11-19 08:26:36,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:35" (2/3) ... [2022-11-19 08:26:36,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@403781b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:26:36, skipping insertion in model container [2022-11-19 08:26:36,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:26:36" (3/3) ... [2022-11-19 08:26:36,250 INFO L112 eAbstractionObserver]: Analyzing ICFG add-2-n-u.c [2022-11-19 08:26:36,271 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:26:36,272 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:26:36,352 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:26:36,361 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;@515bcbc2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:26:36,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:26:36,366 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:26:36,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:26:36,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:26:36,373 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:26:36,375 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:26:36,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:26:36,383 INFO L85 PathProgramCache]: Analyzing trace with hash -199734736, now seen corresponding path program 1 times [2022-11-19 08:26:36,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:26:36,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605586435] [2022-11-19 08:26:36,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:36,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:26:36,505 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:26:36,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361833949] [2022-11-19 08:26:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:36,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:26:36,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:26:36,515 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:26:36,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:26:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:26:36,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:26:36,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:26:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:26:36,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:26:36,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:26:36,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605586435] [2022-11-19 08:26:36,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:26:36,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361833949] [2022-11-19 08:26:36,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361833949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:26:36,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:26:36,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:26:36,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767971536] [2022-11-19 08:26:36,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:26:36,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:26:36,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:26:36,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:26:36,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:26:36,766 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:26:36,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:26:36,852 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2022-11-19 08:26:36,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:26:36,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:26:36,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:26:36,863 INFO L225 Difference]: With dead ends: 23 [2022-11-19 08:26:36,864 INFO L226 Difference]: Without dead ends: 13 [2022-11-19 08:26:36,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:26:36,871 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:26:36,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:26:36,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-19 08:26:36,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-11-19 08:26:36,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:26:36,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2022-11-19 08:26:36,906 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 7 [2022-11-19 08:26:36,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:26:36,907 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2022-11-19 08:26:36,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:26:36,907 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2022-11-19 08:26:36,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:26:36,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:26:36,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:26:36,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:26:37,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-19 08:26:37,126 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:26:37,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:26:37,126 INFO L85 PathProgramCache]: Analyzing trace with hash -692344784, now seen corresponding path program 1 times [2022-11-19 08:26:37,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:26:37,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376457452] [2022-11-19 08:26:37,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:37,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:26:37,146 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:26:37,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [424874893] [2022-11-19 08:26:37,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:37,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:26:37,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:26:37,153 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:26:37,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:26:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:26:37,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:26:37,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:26:37,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:26:37,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:26:37,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:26:37,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376457452] [2022-11-19 08:26:37,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:26:37,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424874893] [2022-11-19 08:26:37,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424874893] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:26:37,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:26:37,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:26:37,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552537281] [2022-11-19 08:26:37,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:26:37,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:26:37,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:26:37,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:26:37,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:26:37,288 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:26:37,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:26:37,360 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2022-11-19 08:26:37,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:26:37,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 08:26:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:26:37,362 INFO L225 Difference]: With dead ends: 31 [2022-11-19 08:26:37,363 INFO L226 Difference]: Without dead ends: 21 [2022-11-19 08:26:37,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:26:37,367 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:26:37,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 9 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:26:37,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-19 08:26:37,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2022-11-19 08:26:37,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:26:37,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2022-11-19 08:26:37,382 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 9 [2022-11-19 08:26:37,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:26:37,383 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2022-11-19 08:26:37,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:26:37,383 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2022-11-19 08:26:37,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:26:37,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:26:37,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:26:37,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:26:37,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:26:37,590 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:26:37,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:26:37,591 INFO L85 PathProgramCache]: Analyzing trace with hash 2131955188, now seen corresponding path program 1 times [2022-11-19 08:26:37,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:26:37,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87302201] [2022-11-19 08:26:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:37,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:26:37,608 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:26:37,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673310943] [2022-11-19 08:26:37,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:37,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:26:37,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:26:37,618 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:26:37,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:26:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:26:37,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:26:37,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:26:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:26:37,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:26:37,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:26:37,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:26:37,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87302201] [2022-11-19 08:26:37,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:26:37,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673310943] [2022-11-19 08:26:37,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673310943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:26:37,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1333498401] [2022-11-19 08:26:37,788 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:26:37,791 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:26:37,795 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:26:37,801 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:26:37,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:26:37,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:37,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:37,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:38,008 INFO L321 Elim1Store]: treesize reduction 176, result has 23.1 percent of original size [2022-11-19 08:26:38,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 78 [2022-11-19 08:26:38,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:38,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:38,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:38,245 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-19 08:26:38,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-19 08:26:38,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:38,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:38,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 55 [2022-11-19 08:26:39,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:39,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:39,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:39,215 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-19 08:26:39,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 435 treesize of output 410 [2022-11-19 08:26:39,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:39,455 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-19 08:26:39,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-19 08:26:39,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:39,526 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-19 08:26:39,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-19 08:26:39,749 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:26:40,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1333498401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:26:40,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:26:40,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2022-11-19 08:26:40,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809978841] [2022-11-19 08:26:40,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:26:40,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:26:40,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:26:40,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:26:40,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:26:40,338 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:26:40,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:26:40,779 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-11-19 08:26:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:26:40,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 08:26:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:26:40,780 INFO L225 Difference]: With dead ends: 31 [2022-11-19 08:26:40,780 INFO L226 Difference]: Without dead ends: 24 [2022-11-19 08:26:40,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:26:40,781 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:26:40,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 9 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:26:40,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-19 08:26:40,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2022-11-19 08:26:40,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:26:40,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2022-11-19 08:26:40,804 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 10 [2022-11-19 08:26:40,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:26:40,804 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2022-11-19 08:26:40,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:26:40,805 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2022-11-19 08:26:40,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:26:40,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:26:40,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:26:40,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:26:41,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-19 08:26:41,016 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:26:41,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:26:41,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1240462748, now seen corresponding path program 1 times [2022-11-19 08:26:41,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:26:41,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554685046] [2022-11-19 08:26:41,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:41,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:26:41,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:26:41,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869777606] [2022-11-19 08:26:41,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:41,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:26:41,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:26:41,041 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:26:41,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:26:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:26:41,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:26:41,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:26:41,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:26:41,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:26:41,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:26:41,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:26:41,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554685046] [2022-11-19 08:26:41,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:26:41,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869777606] [2022-11-19 08:26:41,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869777606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:26:41,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [416563403] [2022-11-19 08:26:41,197 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 08:26:41,198 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:26:41,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:26:41,198 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:26:41,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:26:41,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:41,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:41,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:41,369 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-19 08:26:41,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-19 08:26:41,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:41,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:41,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:41,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2022-11-19 08:26:41,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:41,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:41,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2022-11-19 08:26:41,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:41,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:41,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:41,903 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-19 08:26:41,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 435 treesize of output 410 [2022-11-19 08:26:42,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:42,069 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-19 08:26:42,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-19 08:26:42,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:42,122 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-19 08:26:42,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-19 08:26:42,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:42,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:42,360 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-19 08:26:42,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 58 [2022-11-19 08:26:42,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:42,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:42,479 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:26:42,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:26:42,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:42,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:42,608 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:26:42,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:26:42,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:42,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:42,726 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:26:42,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:26:42,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:42,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:42,891 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:26:42,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:26:42,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:42,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:43,007 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:26:43,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:26:43,025 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:26:44,023 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '426#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= (ite (= (mod |ULTIMATE.start_main_#t~mem10#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-19 08:26:44,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:26:44,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:26:44,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-19 08:26:44,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949743604] [2022-11-19 08:26:44,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:26:44,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:26:44,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:26:44,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:26:44,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:26:44,025 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:26:44,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:26:44,177 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2022-11-19 08:26:44,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:26:44,178 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 08:26:44,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:26:44,180 INFO L225 Difference]: With dead ends: 52 [2022-11-19 08:26:44,180 INFO L226 Difference]: Without dead ends: 38 [2022-11-19 08:26:44,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:26:44,186 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 80 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:26:44,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 15 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:26:44,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-19 08:26:44,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2022-11-19 08:26:44,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:26:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-19 08:26:44,208 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 13 [2022-11-19 08:26:44,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:26:44,209 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-19 08:26:44,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:26:44,209 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-19 08:26:44,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 08:26:44,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:26:44,210 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:26:44,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:26:44,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:26:44,416 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:26:44,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:26:44,417 INFO L85 PathProgramCache]: Analyzing trace with hash -841573940, now seen corresponding path program 2 times [2022-11-19 08:26:44,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:26:44,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918119599] [2022-11-19 08:26:44,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:44,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:26:44,440 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:26:44,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028828208] [2022-11-19 08:26:44,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:26:44,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:26:44,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:26:44,442 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:26:44,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:26:44,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:26:44,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:26:44,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:26:44,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:26:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 08:26:44,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:26:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 08:26:44,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:26:44,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918119599] [2022-11-19 08:26:44,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:26:44,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028828208] [2022-11-19 08:26:44,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028828208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:26:44,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [788114892] [2022-11-19 08:26:44,611 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 08:26:44,611 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:26:44,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:26:44,611 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:26:44,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:26:44,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:44,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:44,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:44,767 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-19 08:26:44,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-19 08:26:44,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:44,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:44,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:44,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2022-11-19 08:26:44,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:44,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:44,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 55 [2022-11-19 08:26:45,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:45,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:26:45,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:45,246 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-19 08:26:45,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 435 treesize of output 410 [2022-11-19 08:26:45,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:45,418 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-19 08:26:45,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-19 08:26:45,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:45,468 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-19 08:26:45,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-19 08:26:45,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:45,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:45,674 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:26:45,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:26:45,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:45,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:45,762 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:26:45,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:26:45,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:45,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:45,898 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:26:45,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:26:45,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:45,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:45,993 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:26:45,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:26:46,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:46,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:46,154 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-19 08:26:46,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 58 [2022-11-19 08:26:46,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:46,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:46,270 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:26:46,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:26:46,293 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:26:47,221 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '693#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= (ite (= (mod |ULTIMATE.start_main_#t~mem10#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-19 08:26:47,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:26:47,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:26:47,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-19 08:26:47,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428582121] [2022-11-19 08:26:47,222 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:26:47,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:26:47,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:26:47,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:26:47,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:26:47,223 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:26:47,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:26:47,312 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2022-11-19 08:26:47,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:26:47,313 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-19 08:26:47,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:26:47,314 INFO L225 Difference]: With dead ends: 72 [2022-11-19 08:26:47,314 INFO L226 Difference]: Without dead ends: 49 [2022-11-19 08:26:47,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:26:47,316 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:26:47,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 10 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:26:47,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-19 08:26:47,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-19 08:26:47,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:26:47,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2022-11-19 08:26:47,343 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 19 [2022-11-19 08:26:47,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:26:47,343 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2022-11-19 08:26:47,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:26:47,343 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2022-11-19 08:26:47,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:26:47,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:26:47,344 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:26:47,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:26:47,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:26:47,550 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:26:47,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:26:47,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1454414132, now seen corresponding path program 3 times [2022-11-19 08:26:47,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:26:47,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533503819] [2022-11-19 08:26:47,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:47,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:26:47,574 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:26:47,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770875238] [2022-11-19 08:26:47,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:26:47,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:26:47,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:26:47,576 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:26:47,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:27:01,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:27:01,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:27:01,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 08:27:01,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:27:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-19 08:27:01,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:27:01,319 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-19 08:27:01,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:27:01,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533503819] [2022-11-19 08:27:01,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:27:01,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770875238] [2022-11-19 08:27:01,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770875238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:27:01,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1268172492] [2022-11-19 08:27:01,324 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 08:27:01,324 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:27:01,325 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:27:01,325 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:27:01,325 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:27:01,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:01,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:01,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:01,456 INFO L321 Elim1Store]: treesize reduction 176, result has 23.1 percent of original size [2022-11-19 08:27:01,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 78 [2022-11-19 08:27:01,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:01,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:01,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:01,628 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-19 08:27:01,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-19 08:27:01,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:01,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:01,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 55 [2022-11-19 08:27:02,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:02,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:02,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:02,114 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-19 08:27:02,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 435 treesize of output 410 [2022-11-19 08:27:02,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:02,248 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-19 08:27:02,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-19 08:27:02,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:02,298 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-19 08:27:02,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-19 08:27:02,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:02,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:02,575 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:27:02,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:27:02,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:02,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:02,685 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:27:02,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:27:02,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:02,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:02,809 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:27:02,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:27:02,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:02,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:02,912 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:27:02,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:27:03,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:03,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:03,084 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:27:03,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:27:03,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:03,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:03,186 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:27:03,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:27:03,211 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:27:04,205 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1151#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= (ite (= (mod |ULTIMATE.start_main_#t~mem10#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-19 08:27:04,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:27:04,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:27:04,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-19 08:27:04,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658918287] [2022-11-19 08:27:04,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:27:04,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 08:27:04,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:27:04,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 08:27:04,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:27:04,207 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:27:04,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:27:04,475 INFO L93 Difference]: Finished difference Result 158 states and 212 transitions. [2022-11-19 08:27:04,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 08:27:04,476 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-19 08:27:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:27:04,477 INFO L225 Difference]: With dead ends: 158 [2022-11-19 08:27:04,477 INFO L226 Difference]: Without dead ends: 116 [2022-11-19 08:27:04,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=231, Invalid=369, Unknown=0, NotChecked=0, Total=600 [2022-11-19 08:27:04,478 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 170 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:27:04,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 33 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:27:04,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-19 08:27:04,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2022-11-19 08:27:04,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1875) internal successors, (114), 96 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:27:04,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2022-11-19 08:27:04,524 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 37 [2022-11-19 08:27:04,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:27:04,524 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2022-11-19 08:27:04,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:27:04,525 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2022-11-19 08:27:04,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 08:27:04,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:27:04,528 INFO L195 NwaCegarLoop]: trace histogram [40, 10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:27:04,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:27:04,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:27:04,729 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:27:04,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:27:04,729 INFO L85 PathProgramCache]: Analyzing trace with hash -2081508276, now seen corresponding path program 4 times [2022-11-19 08:27:04,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:27:04,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498579629] [2022-11-19 08:27:04,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:27:04,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:27:04,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:27:04,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194383558] [2022-11-19 08:27:04,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:27:04,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:27:04,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:27:04,799 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:27:04,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:27:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:27:05,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:27:05,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:27:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-11-19 08:27:05,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:27:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-11-19 08:27:05,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:27:05,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498579629] [2022-11-19 08:27:05,429 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:27:05,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194383558] [2022-11-19 08:27:05,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194383558] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:27:05,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [522827475] [2022-11-19 08:27:05,431 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 08:27:05,432 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:27:05,432 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:27:05,432 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:27:05,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:27:05,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:05,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:05,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:05,554 INFO L321 Elim1Store]: treesize reduction 176, result has 23.1 percent of original size [2022-11-19 08:27:05,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 78 [2022-11-19 08:27:05,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:05,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:05,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:05,729 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-19 08:27:05,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-19 08:27:05,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:05,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:05,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2022-11-19 08:27:06,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:06,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:06,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:06,123 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-19 08:27:06,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 435 treesize of output 410 [2022-11-19 08:27:06,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:06,275 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-19 08:27:06,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-19 08:27:06,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:06,325 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-19 08:27:06,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-19 08:27:06,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:06,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:06,522 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-19 08:27:06,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 58 [2022-11-19 08:27:06,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:06,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:06,621 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:27:06,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:27:06,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:06,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:06,737 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-19 08:27:06,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 58 [2022-11-19 08:27:06,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:06,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:06,831 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:27:06,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:27:06,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:06,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:06,976 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-19 08:27:06,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 58 [2022-11-19 08:27:07,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:07,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:07,110 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:27:07,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:27:07,128 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:27:08,094 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2049#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= (ite (= (mod |ULTIMATE.start_main_#t~mem10#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-19 08:27:08,094 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:27:08,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:27:08,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-11-19 08:27:08,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033716799] [2022-11-19 08:27:08,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:27:08,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 08:27:08,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:27:08,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 08:27:08,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=588, Unknown=0, NotChecked=0, Total=992 [2022-11-19 08:27:08,096 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:27:08,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:27:08,729 INFO L93 Difference]: Finished difference Result 320 states and 416 transitions. [2022-11-19 08:27:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 08:27:08,730 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 25 states have internal predecessors, (38), 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 67 [2022-11-19 08:27:08,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:27:08,733 INFO L225 Difference]: With dead ends: 320 [2022-11-19 08:27:08,734 INFO L226 Difference]: Without dead ends: 236 [2022-11-19 08:27:08,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 166 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=723, Invalid=1083, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 08:27:08,737 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 348 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:27:08,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 69 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:27:08,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-11-19 08:27:08,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 193. [2022-11-19 08:27:08,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.15625) internal successors, (222), 192 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:27:08,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 222 transitions. [2022-11-19 08:27:08,831 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 222 transitions. Word has length 67 [2022-11-19 08:27:08,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:27:08,832 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 222 transitions. [2022-11-19 08:27:08,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:27:08,832 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 222 transitions. [2022-11-19 08:27:08,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-19 08:27:08,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:27:08,841 INFO L195 NwaCegarLoop]: trace histogram [88, 22, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:27:08,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:27:09,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 08:27:09,058 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:27:09,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:27:09,059 INFO L85 PathProgramCache]: Analyzing trace with hash 502361932, now seen corresponding path program 5 times [2022-11-19 08:27:09,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:27:09,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723778293] [2022-11-19 08:27:09,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:27:09,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:27:09,172 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:27:09,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375468938] [2022-11-19 08:27:09,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:27:09,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:27:09,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:27:09,174 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:27:09,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:27:09,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:27:09,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:27:09,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:27:09,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:27:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4450 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4449 trivial. 0 not checked. [2022-11-19 08:27:09,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:27:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4450 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4449 trivial. 0 not checked. [2022-11-19 08:27:09,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:27:09,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723778293] [2022-11-19 08:27:09,927 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:27:09,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375468938] [2022-11-19 08:27:09,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375468938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:27:09,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [620638817] [2022-11-19 08:27:09,929 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 08:27:09,929 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:27:09,930 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:27:09,930 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:27:09,930 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:27:09,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:09,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:09,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:10,046 INFO L321 Elim1Store]: treesize reduction 176, result has 23.1 percent of original size [2022-11-19 08:27:10,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 78 [2022-11-19 08:27:10,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:10,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:10,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:10,199 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-19 08:27:10,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-19 08:27:10,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:10,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:10,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 55 [2022-11-19 08:27:10,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:10,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:27:10,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:10,575 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-19 08:27:10,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 435 treesize of output 410 [2022-11-19 08:27:10,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:10,700 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-19 08:27:10,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-19 08:27:10,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:10,750 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-19 08:27:10,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-19 08:27:10,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:10,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:10,927 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:27:10,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:27:10,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:10,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:11,016 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:27:11,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:27:11,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:11,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:11,125 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-19 08:27:11,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 58 [2022-11-19 08:27:11,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:11,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:11,221 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:27:11,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:27:11,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:11,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:11,381 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:27:11,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:27:11,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:11,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:27:11,486 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-19 08:27:11,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 70 [2022-11-19 08:27:11,501 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:27:12,459 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3763#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= (ite (= (mod |ULTIMATE.start_main_#t~mem10#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-19 08:27:12,459 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:27:12,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:27:12,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-19 08:27:12,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875509102] [2022-11-19 08:27:12,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:27:12,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:27:12,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:27:12,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:27:12,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:27:12,461 INFO L87 Difference]: Start difference. First operand 193 states and 222 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:27:12,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:27:12,670 INFO L93 Difference]: Finished difference Result 546 states and 669 transitions. [2022-11-19 08:27:12,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:27:12,670 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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 127 [2022-11-19 08:27:12,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:27:12,673 INFO L225 Difference]: With dead ends: 546 [2022-11-19 08:27:12,673 INFO L226 Difference]: Without dead ends: 476 [2022-11-19 08:27:12,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 364 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:27:12,674 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 100 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:27:12,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 16 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:27:12,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-11-19 08:27:12,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 265. [2022-11-19 08:27:12,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.125) internal successors, (297), 264 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:27:12,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 297 transitions. [2022-11-19 08:27:12,777 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 297 transitions. Word has length 127 [2022-11-19 08:27:12,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:27:12,778 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 297 transitions. [2022-11-19 08:27:12,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:27:12,779 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 297 transitions. [2022-11-19 08:27:12,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-19 08:27:12,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:27:12,784 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:27:12,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:27:12,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-19 08:27:12,989 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:27:12,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:27:12,990 INFO L85 PathProgramCache]: Analyzing trace with hash 109665440, now seen corresponding path program 6 times [2022-11-19 08:27:12,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:27:12,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544745808] [2022-11-19 08:27:12,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:27:12,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:27:13,098 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:27:13,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846459660] [2022-11-19 08:27:13,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:27:13,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:27:13,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:27:13,100 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:27:13,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e1f06b-700f-4c1d-a4cf-0183d20cce17/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process