./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a46b64c20324a7544dfe7936b5f39eaa32bba659068797748195a7f292bdaee --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 09:45:07,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:45:07,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:45:08,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:45:08,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:45:08,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:45:08,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:45:08,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:45:08,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:45:08,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:45:08,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:45:08,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:45:08,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:45:08,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:45:08,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:45:08,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:45:08,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:45:08,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:45:08,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:45:08,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:45:08,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:45:08,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:45:08,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:45:08,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:45:08,046 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:45:08,046 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:45:08,046 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:45:08,047 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:45:08,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:45:08,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:45:08,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:45:08,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:45:08,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:45:08,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:45:08,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:45:08,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:45:08,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:45:08,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:45:08,050 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:45:08,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:45:08,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:45:08,052 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:45:08,065 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:45:08,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:45:08,065 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:45:08,066 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:45:08,066 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:45:08,066 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:45:08,066 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:45:08,066 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:45:08,067 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:45:08,067 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:45:08,067 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:45:08,067 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:45:08,067 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:45:08,067 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:45:08,067 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:45:08,067 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:45:08,068 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:45:08,068 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:45:08,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:45:08,068 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:45:08,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:45:08,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:45:08,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:45:08,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:45:08,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:45:08,069 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:45:08,069 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:45:08,069 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:45:08,069 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:45:08,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:45:08,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:45:08,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:45:08,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:45:08,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:45:08,070 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:45:08,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:45:08,070 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:45:08,070 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:45:08,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:45:08,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:45:08,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:45:08,070 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_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a46b64c20324a7544dfe7936b5f39eaa32bba659068797748195a7f292bdaee [2022-12-14 09:45:08,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:45:08,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:45:08,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:45:08,261 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:45:08,262 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:45:08,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2022-12-14 09:45:10,942 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:45:11,081 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:45:11,082 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2022-12-14 09:45:11,086 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/data/7d94c9eb7/d2844e3127a841fb91ed5cf9036c69c3/FLAGa188519ad [2022-12-14 09:45:11,099 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/data/7d94c9eb7/d2844e3127a841fb91ed5cf9036c69c3 [2022-12-14 09:45:11,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:45:11,104 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:45:11,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:45:11,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:45:11,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:45:11,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:45:11" (1/1) ... [2022-12-14 09:45:11,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79afa0d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:45:11, skipping insertion in model container [2022-12-14 09:45:11,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:45:11" (1/1) ... [2022-12-14 09:45:11,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:45:11,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:45:11,252 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c[416,429] [2022-12-14 09:45:11,267 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:45:11,274 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:45:11,284 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c[416,429] [2022-12-14 09:45:11,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:45:11,302 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:45:11,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:45:11 WrapperNode [2022-12-14 09:45:11,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:45:11,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:45:11,304 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:45:11,304 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:45:11,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:45:11" (1/1) ... [2022-12-14 09:45:11,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:45:11" (1/1) ... [2022-12-14 09:45:11,329 INFO L138 Inliner]: procedures = 15, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2022-12-14 09:45:11,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:45:11,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:45:11,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:45:11,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:45:11,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:45:11" (1/1) ... [2022-12-14 09:45:11,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:45:11" (1/1) ... [2022-12-14 09:45:11,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:45:11" (1/1) ... [2022-12-14 09:45:11,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:45:11" (1/1) ... [2022-12-14 09:45:11,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:45:11" (1/1) ... [2022-12-14 09:45:11,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:45:11" (1/1) ... [2022-12-14 09:45:11,366 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:45:11" (1/1) ... [2022-12-14 09:45:11,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:45:11" (1/1) ... [2022-12-14 09:45:11,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:45:11,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:45:11,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:45:11,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:45:11,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:45:11" (1/1) ... [2022-12-14 09:45:11,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:45:11,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:45:11,396 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:45:11,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:45:11,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:45:11,430 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 09:45:11,431 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 09:45:11,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:45:11,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 09:45:11,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 09:45:11,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:45:11,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:45:11,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 09:45:11,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 09:45:11,494 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:45:11,496 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:45:11,603 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:45:11,630 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:45:11,630 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-14 09:45:11,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:45:11 BoogieIcfgContainer [2022-12-14 09:45:11,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:45:11,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:45:11,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:45:11,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:45:11,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:45:11" (1/3) ... [2022-12-14 09:45:11,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@126125a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:45:11, skipping insertion in model container [2022-12-14 09:45:11,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:45:11" (2/3) ... [2022-12-14 09:45:11,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@126125a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:45:11, skipping insertion in model container [2022-12-14 09:45:11,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:45:11" (3/3) ... [2022-12-14 09:45:11,639 INFO L112 eAbstractionObserver]: Analyzing ICFG copy-partial-2-n-u.c [2022-12-14 09:45:11,658 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:45:11,658 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 09:45:11,707 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:45:11,715 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;@5e08f81c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:45:11,715 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 09:45:11,719 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:45:11,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 09:45:11,727 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:45:11,727 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:45:11,728 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:45:11,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:45:11,733 INFO L85 PathProgramCache]: Analyzing trace with hash -504600123, now seen corresponding path program 1 times [2022-12-14 09:45:11,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:45:11,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552717185] [2022-12-14 09:45:11,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:11,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:45:11,808 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:45:11,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483505290] [2022-12-14 09:45:11,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:11,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:11,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:45:11,810 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:45:11,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:45:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:45:11,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:45:11,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:45:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:45:11,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:45:11,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:45:11,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552717185] [2022-12-14 09:45:11,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:45:11,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483505290] [2022-12-14 09:45:11,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483505290] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:45:11,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:45:11,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:45:11,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856528280] [2022-12-14 09:45:11,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:45:11,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:45:11,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:45:11,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:45:11,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:45:11,991 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 09:45:12,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:45:12,053 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2022-12-14 09:45:12,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:45:12,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-12-14 09:45:12,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:45:12,062 INFO L225 Difference]: With dead ends: 37 [2022-12-14 09:45:12,062 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 09:45:12,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:45:12,068 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:45:12,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 14 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:45:12,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 09:45:12,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 17. [2022-12-14 09:45:12,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:45:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2022-12-14 09:45:12,101 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 14 [2022-12-14 09:45:12,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:45:12,102 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2022-12-14 09:45:12,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 09:45:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2022-12-14 09:45:12,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 09:45:12,103 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:45:12,103 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:45:12,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:45:12,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 09:45:12,305 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:45:12,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:45:12,307 INFO L85 PathProgramCache]: Analyzing trace with hash 374620790, now seen corresponding path program 1 times [2022-12-14 09:45:12,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:45:12,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088058297] [2022-12-14 09:45:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:12,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:45:12,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:45:12,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [646426651] [2022-12-14 09:45:12,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:12,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:12,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:45:12,344 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:45:12,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:45:12,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:45:12,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:45:12,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:45:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:45:12,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:45:12,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:45:12,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088058297] [2022-12-14 09:45:12,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:45:12,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646426651] [2022-12-14 09:45:12,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646426651] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:45:12,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:45:12,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:45:12,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858663116] [2022-12-14 09:45:12,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:45:12,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:45:12,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:45:12,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:45:12,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:45:12,482 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 09:45:12,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:45:12,525 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2022-12-14 09:45:12,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:45:12,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2022-12-14 09:45:12,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:45:12,526 INFO L225 Difference]: With dead ends: 36 [2022-12-14 09:45:12,526 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 09:45:12,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:45:12,528 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:45:12,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 16 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:45:12,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 09:45:12,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2022-12-14 09:45:12,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:45:12,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-12-14 09:45:12,533 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 16 [2022-12-14 09:45:12,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:45:12,533 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-12-14 09:45:12,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 09:45:12,533 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2022-12-14 09:45:12,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 09:45:12,534 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:45:12,534 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:45:12,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:45:12,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:12,736 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:45:12,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:45:12,738 INFO L85 PathProgramCache]: Analyzing trace with hash 662426069, now seen corresponding path program 1 times [2022-12-14 09:45:12,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:45:12,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960402041] [2022-12-14 09:45:12,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:12,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:45:12,768 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:45:12,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122199330] [2022-12-14 09:45:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:12,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:12,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:45:12,773 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:45:12,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:45:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:45:12,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 09:45:12,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:45:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:45:12,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:45:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:45:12,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:45:12,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960402041] [2022-12-14 09:45:12,969 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:45:12,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122199330] [2022-12-14 09:45:12,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122199330] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:45:12,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1374803515] [2022-12-14 09:45:12,990 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 09:45:12,990 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:45:12,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:45:12,999 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:45:13,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:45:13,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:13,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:13,116 INFO L321 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2022-12-14 09:45:13,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 09:45:13,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:13,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:13,210 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 09:45:13,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 09:45:13,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:13,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-12-14 09:45:13,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:13,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:13,590 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-12-14 09:45:13,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 399 treesize of output 382 [2022-12-14 09:45:13,679 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:13,745 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:13,791 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:13,821 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:13,906 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 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-14 09:45:13,943 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:13,986 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-12-14 09:45:14,023 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:45:14,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1374803515] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:45:14,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:45:14,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 5] total 14 [2022-12-14 09:45:14,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058922294] [2022-12-14 09:45:14,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:45:14,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:45:14,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:45:14,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:45:14,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-12-14 09:45:14,992 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 09:45:15,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:45:15,662 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2022-12-14 09:45:15,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:45:15,663 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-12-14 09:45:15,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:45:15,663 INFO L225 Difference]: With dead ends: 35 [2022-12-14 09:45:15,663 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 09:45:15,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-12-14 09:45:15,664 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:45:15,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 17 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:45:15,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 09:45:15,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-12-14 09:45:15,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:45:15,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-12-14 09:45:15,674 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 17 [2022-12-14 09:45:15,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:45:15,674 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-12-14 09:45:15,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 09:45:15,675 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-12-14 09:45:15,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 09:45:15,675 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:45:15,675 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:45:15,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 09:45:15,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:15,877 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:45:15,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:45:15,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1262512447, now seen corresponding path program 1 times [2022-12-14 09:45:15,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:45:15,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571506887] [2022-12-14 09:45:15,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:15,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:45:15,900 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:45:15,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102006811] [2022-12-14 09:45:15,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:15,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:15,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:45:15,904 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:45:15,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:45:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:45:15,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 09:45:15,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:45:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 09:45:15,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:45:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 09:45:16,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:45:16,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571506887] [2022-12-14 09:45:16,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:45:16,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102006811] [2022-12-14 09:45:16,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102006811] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:45:16,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1222116516] [2022-12-14 09:45:16,017 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:45:16,017 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:45:16,017 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:45:16,018 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:45:16,018 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:45:16,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:16,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:16,079 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 09:45:16,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 09:45:16,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:16,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:16,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2022-12-14 09:45:16,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:16,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-12-14 09:45:16,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:16,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:16,336 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-12-14 09:45:16,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 391 treesize of output 384 [2022-12-14 09:45:16,456 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:16,525 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:16,552 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:16,576 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:16,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:16,632 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-12-14 09:45:16,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-12-14 09:45:16,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:16,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:16,725 INFO L321 Elim1Store]: treesize reduction 116, result has 33.3 percent of original size [2022-12-14 09:45:16,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 147 [2022-12-14 09:45:16,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:16,800 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:16,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:16,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:16,845 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:16,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:16,968 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:16,996 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:17,022 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:17,060 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-12-14 09:45:17,100 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:45:17,975 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '623#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-12-14 09:45:17,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:45:17,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:45:17,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-12-14 09:45:17,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043185644] [2022-12-14 09:45:17,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:45:17,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:45:17,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:45:17,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:45:17,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-12-14 09:45:17,977 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 09:45:18,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:45:18,109 INFO L93 Difference]: Finished difference Result 72 states and 98 transitions. [2022-12-14 09:45:18,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:45:18,110 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2022-12-14 09:45:18,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:45:18,111 INFO L225 Difference]: With dead ends: 72 [2022-12-14 09:45:18,111 INFO L226 Difference]: Without dead ends: 57 [2022-12-14 09:45:18,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-12-14 09:45:18,112 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:45:18,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 26 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:45:18,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-14 09:45:18,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 25. [2022-12-14 09:45:18,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:45:18,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-12-14 09:45:18,125 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 20 [2022-12-14 09:45:18,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:45:18,125 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-12-14 09:45:18,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 09:45:18,125 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-12-14 09:45:18,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 09:45:18,125 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:45:18,126 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:45:18,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 09:45:18,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:18,326 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:45:18,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:45:18,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1987518784, now seen corresponding path program 2 times [2022-12-14 09:45:18,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:45:18,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675594662] [2022-12-14 09:45:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:18,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:45:18,332 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:45:18,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157984361] [2022-12-14 09:45:18,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:45:18,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:18,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:45:18,334 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:45:18,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 09:45:18,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 09:45:18,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:45:18,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 09:45:18,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:45:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 09:45:18,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:45:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 09:45:18,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:45:18,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675594662] [2022-12-14 09:45:18,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:45:18,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157984361] [2022-12-14 09:45:18,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157984361] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:45:18,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [208931096] [2022-12-14 09:45:18,435 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:45:18,435 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:45:18,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:45:18,435 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:45:18,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:45:18,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:18,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:18,484 INFO L321 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2022-12-14 09:45:18,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 09:45:18,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:18,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:18,536 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 09:45:18,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 09:45:18,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:18,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-12-14 09:45:18,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:18,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:18,830 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-12-14 09:45:18,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 391 treesize of output 384 [2022-12-14 09:45:18,961 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:19,003 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:19,033 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:19,051 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:19,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:19,101 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-12-14 09:45:19,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-12-14 09:45:19,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:19,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:19,202 INFO L321 Elim1Store]: treesize reduction 116, result has 33.3 percent of original size [2022-12-14 09:45:19,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 147 [2022-12-14 09:45:19,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:19,277 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:19,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:19,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:19,309 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:19,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:19,403 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:19,426 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:19,456 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:19,496 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-12-14 09:45:19,537 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:45:20,513 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '943#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-12-14 09:45:20,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:45:20,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:45:20,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-12-14 09:45:20,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642050572] [2022-12-14 09:45:20,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:45:20,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:45:20,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:45:20,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:45:20,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-12-14 09:45:20,515 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 09:45:20,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:45:20,648 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2022-12-14 09:45:20,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:45:20,649 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2022-12-14 09:45:20,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:45:20,650 INFO L225 Difference]: With dead ends: 80 [2022-12-14 09:45:20,650 INFO L226 Difference]: Without dead ends: 72 [2022-12-14 09:45:20,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-12-14 09:45:20,651 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 100 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:45:20,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 24 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:45:20,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-14 09:45:20,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 31. [2022-12-14 09:45:20,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:45:20,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2022-12-14 09:45:20,667 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 23 [2022-12-14 09:45:20,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:45:20,668 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2022-12-14 09:45:20,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 09:45:20,668 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2022-12-14 09:45:20,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 09:45:20,668 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:45:20,668 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:45:20,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 09:45:20,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:20,869 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:45:20,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:45:20,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1904293799, now seen corresponding path program 3 times [2022-12-14 09:45:20,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:45:20,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967197256] [2022-12-14 09:45:20,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:20,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:45:20,876 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:45:20,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83470964] [2022-12-14 09:45:20,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:45:20,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:20,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:45:20,877 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:45:20,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 09:45:20,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:45:20,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:45:20,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 09:45:20,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:45:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 09:45:20,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:45:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 09:45:20,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:45:20,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967197256] [2022-12-14 09:45:20,937 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:45:20,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83470964] [2022-12-14 09:45:20,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83470964] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:45:20,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2083617156] [2022-12-14 09:45:20,939 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:45:20,939 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:45:20,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:45:20,940 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:45:20,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:45:20,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:20,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:20,977 INFO L321 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2022-12-14 09:45:20,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 09:45:20,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:20,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:21,024 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 09:45:21,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 09:45:21,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:21,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-12-14 09:45:21,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:21,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:21,237 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-12-14 09:45:21,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 391 treesize of output 384 [2022-12-14 09:45:21,334 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:21,378 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:21,401 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:21,418 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:21,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:21,457 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:21,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:21,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:21,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:21,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:21,530 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-12-14 09:45:21,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 141 [2022-12-14 09:45:21,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:21,577 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:21,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:21,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:21,611 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:21,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:21,704 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 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-14 09:45:21,723 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:21,767 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-12-14 09:45:21,795 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:45:22,611 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1328#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-12-14 09:45:22,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:45:22,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:45:22,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-12-14 09:45:22,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155178832] [2022-12-14 09:45:22,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:45:22,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:45:22,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:45:22,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:45:22,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-12-14 09:45:22,612 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 09:45:22,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:45:22,694 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-12-14 09:45:22,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:45:22,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-12-14 09:45:22,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:45:22,695 INFO L225 Difference]: With dead ends: 52 [2022-12-14 09:45:22,695 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 09:45:22,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2022-12-14 09:45:22,696 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:45:22,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 19 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:45:22,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 09:45:22,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-12-14 09:45:22,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:45:22,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-12-14 09:45:22,713 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 29 [2022-12-14 09:45:22,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:45:22,713 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-12-14 09:45:22,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 09:45:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-12-14 09:45:22,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 09:45:22,714 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:45:22,714 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:45:22,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 09:45:22,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 09:45:22,915 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:45:22,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:45:22,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2081114550, now seen corresponding path program 4 times [2022-12-14 09:45:22,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:45:22,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013528700] [2022-12-14 09:45:22,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:22,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:45:22,922 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:45:22,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221126469] [2022-12-14 09:45:22,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:45:22,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:22,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:45:22,923 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:45:22,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 09:45:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:45:22,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 09:45:22,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:45:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 09:45:23,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:45:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 09:45:23,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:45:23,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013528700] [2022-12-14 09:45:23,067 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:45:23,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221126469] [2022-12-14 09:45:23,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221126469] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:45:23,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [445941872] [2022-12-14 09:45:23,069 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:45:23,069 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:45:23,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:45:23,069 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:45:23,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:45:23,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:23,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:23,122 INFO L321 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2022-12-14 09:45:23,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 09:45:23,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:23,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:23,186 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 09:45:23,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 09:45:23,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:23,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-12-14 09:45:23,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:23,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:23,406 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-12-14 09:45:23,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 391 treesize of output 384 [2022-12-14 09:45:23,538 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:23,584 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 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-14 09:45:23,610 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:23,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:23,663 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-12-14 09:45:23,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-12-14 09:45:23,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:23,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:23,757 INFO L321 Elim1Store]: treesize reduction 116, result has 33.3 percent of original size [2022-12-14 09:45:23,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 147 [2022-12-14 09:45:23,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:23,837 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:23,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:23,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:23,883 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:23,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:23,963 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:23,984 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:24,001 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:24,027 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-12-14 09:45:24,052 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:45:24,999 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1697#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-12-14 09:45:24,999 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:45:24,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:45:24,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-12-14 09:45:24,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481900137] [2022-12-14 09:45:24,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:45:25,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 09:45:25,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:45:25,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 09:45:25,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2022-12-14 09:45:25,001 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 09:45:25,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:45:25,335 INFO L93 Difference]: Finished difference Result 196 states and 273 transitions. [2022-12-14 09:45:25,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 09:45:25,335 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-12-14 09:45:25,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:45:25,336 INFO L225 Difference]: With dead ends: 196 [2022-12-14 09:45:25,336 INFO L226 Difference]: Without dead ends: 170 [2022-12-14 09:45:25,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 58 SyntacticMatches, 16 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=235, Invalid=467, Unknown=0, NotChecked=0, Total=702 [2022-12-14 09:45:25,337 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 227 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:45:25,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 46 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:45:25,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-12-14 09:45:25,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 39. [2022-12-14 09:45:25,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:45:25,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2022-12-14 09:45:25,359 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 32 [2022-12-14 09:45:25,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:45:25,359 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2022-12-14 09:45:25,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 09:45:25,359 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2022-12-14 09:45:25,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 09:45:25,360 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:45:25,360 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:45:25,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 09:45:25,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 09:45:25,562 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:45:25,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:45:25,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1536255318, now seen corresponding path program 5 times [2022-12-14 09:45:25,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:45:25,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490514422] [2022-12-14 09:45:25,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:25,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:45:25,577 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:45:25,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712984667] [2022-12-14 09:45:25,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:45:25,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:25,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:45:25,578 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:45:25,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 09:45:25,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 09:45:25,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:45:25,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 09:45:25,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:45:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-12-14 09:45:25,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:45:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-12-14 09:45:25,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:45:25,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490514422] [2022-12-14 09:45:25,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:45:25,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712984667] [2022-12-14 09:45:25,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712984667] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:45:25,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [447124796] [2022-12-14 09:45:25,695 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:45:25,695 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:45:25,696 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:45:25,696 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:45:25,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:45:25,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:25,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:25,739 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 09:45:25,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 09:45:25,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:25,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:25,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2022-12-14 09:45:25,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:25,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-12-14 09:45:25,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:25,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:25,951 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-12-14 09:45:25,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 399 treesize of output 382 [2022-12-14 09:45:26,011 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:26,057 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 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-14 09:45:26,087 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:26,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:26,133 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:26,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:26,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:26,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:26,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:26,193 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-12-14 09:45:26,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 141 [2022-12-14 09:45:26,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:26,236 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:26,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:26,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:26,268 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:26,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:26,355 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:26,379 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:26,400 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:26,429 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-12-14 09:45:26,464 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:45:27,211 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2370#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-12-14 09:45:27,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:45:27,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:45:27,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-12-14 09:45:27,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103460610] [2022-12-14 09:45:27,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:45:27,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:45:27,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:45:27,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:45:27,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-12-14 09:45:27,212 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 09:45:27,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:45:27,360 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2022-12-14 09:45:27,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:45:27,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2022-12-14 09:45:27,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:45:27,362 INFO L225 Difference]: With dead ends: 125 [2022-12-14 09:45:27,362 INFO L226 Difference]: Without dead ends: 105 [2022-12-14 09:45:27,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-12-14 09:45:27,362 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 122 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:45:27,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 29 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:45:27,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-12-14 09:45:27,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 75. [2022-12-14 09:45:27,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 71 states have internal predecessors, (83), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:45:27,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2022-12-14 09:45:27,405 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 38 [2022-12-14 09:45:27,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:45:27,405 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2022-12-14 09:45:27,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 09:45:27,405 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2022-12-14 09:45:27,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 09:45:27,406 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:45:27,406 INFO L195 NwaCegarLoop]: trace histogram [40, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:45:27,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 09:45:27,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:27,608 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:45:27,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:45:27,609 INFO L85 PathProgramCache]: Analyzing trace with hash 162075657, now seen corresponding path program 6 times [2022-12-14 09:45:27,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:45:27,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566405408] [2022-12-14 09:45:27,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:27,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:45:27,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:45:27,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638670937] [2022-12-14 09:45:27,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:45:27,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:27,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:45:27,673 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:45:27,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 09:45:27,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:45:27,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:45:27,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 09:45:27,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:45:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 34 proven. 737 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-12-14 09:45:27,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:45:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 34 proven. 737 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-12-14 09:45:28,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:45:28,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566405408] [2022-12-14 09:45:28,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:45:28,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638670937] [2022-12-14 09:45:28,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638670937] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:45:28,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [413952637] [2022-12-14 09:45:28,219 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:45:28,220 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:45:28,220 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:45:28,220 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:45:28,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:45:28,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:28,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:28,276 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 09:45:28,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 09:45:28,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:28,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:28,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2022-12-14 09:45:28,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:28,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-12-14 09:45:28,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:28,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:28,492 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-12-14 09:45:28,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 399 treesize of output 382 [2022-12-14 09:45:28,560 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:28,607 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 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-14 09:45:28,638 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:28,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:28,685 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-12-14 09:45:28,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-12-14 09:45:28,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:28,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:28,770 INFO L321 Elim1Store]: treesize reduction 116, result has 33.3 percent of original size [2022-12-14 09:45:28,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 147 [2022-12-14 09:45:28,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:28,848 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:28,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:28,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:28,898 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:28,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:28,984 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:29,014 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:29,030 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:29,062 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-12-14 09:45:29,099 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:45:30,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3217#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-12-14 09:45:30,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:45:30,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:45:30,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2022-12-14 09:45:30,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919960925] [2022-12-14 09:45:30,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:45:30,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 09:45:30,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:45:30,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 09:45:30,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2022-12-14 09:45:30,338 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 09:45:30,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:45:30,731 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2022-12-14 09:45:30,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 09:45:30,732 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 74 [2022-12-14 09:45:30,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:45:30,733 INFO L225 Difference]: With dead ends: 159 [2022-12-14 09:45:30,733 INFO L226 Difference]: Without dead ends: 139 [2022-12-14 09:45:30,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 175 SyntacticMatches, 16 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 09:45:30,734 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 147 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:45:30,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 64 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:45:30,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-12-14 09:45:30,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 87. [2022-12-14 09:45:30,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.1566265060240963) internal successors, (96), 83 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:45:30,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2022-12-14 09:45:30,784 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 74 [2022-12-14 09:45:30,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:45:30,784 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2022-12-14 09:45:30,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 09:45:30,784 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2022-12-14 09:45:30,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 09:45:30,785 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:45:30,785 INFO L195 NwaCegarLoop]: trace histogram [50, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:45:30,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 09:45:30,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:30,986 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:45:30,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:45:30,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1862958950, now seen corresponding path program 7 times [2022-12-14 09:45:30,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:45:30,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478592802] [2022-12-14 09:45:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:30,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:45:31,020 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:45:31,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939959091] [2022-12-14 09:45:31,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:45:31,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:31,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:45:31,022 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:45:31,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 09:45:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:45:31,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 09:45:31,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:45:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 489 proven. 55 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2022-12-14 09:45:31,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:45:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 489 proven. 55 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2022-12-14 09:45:31,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:45:31,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478592802] [2022-12-14 09:45:31,296 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:45:31,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939959091] [2022-12-14 09:45:31,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939959091] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:45:31,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [566060127] [2022-12-14 09:45:31,297 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:45:31,297 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:45:31,297 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:45:31,297 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:45:31,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:45:31,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:31,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:31,343 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 09:45:31,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 09:45:31,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:31,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:31,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2022-12-14 09:45:31,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:31,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-12-14 09:45:31,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:31,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:31,550 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-12-14 09:45:31,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 399 treesize of output 382 [2022-12-14 09:45:31,606 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:31,651 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 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-14 09:45:31,670 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:31,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:31,724 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:31,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:31,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:31,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:31,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:31,775 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-12-14 09:45:31,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 141 [2022-12-14 09:45:31,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:31,814 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:31,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:31,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:31,841 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:31,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:31,935 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:31,958 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:31,977 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:32,002 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-12-14 09:45:32,030 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:45:32,893 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4237#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-12-14 09:45:32,893 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:45:32,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:45:32,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-12-14 09:45:32,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858978923] [2022-12-14 09:45:32,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:45:32,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 09:45:32,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:45:32,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 09:45:32,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 09:45:32,896 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 09:45:33,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:45:33,849 INFO L93 Difference]: Finished difference Result 515 states and 725 transitions. [2022-12-14 09:45:33,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 09:45:33,850 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 86 [2022-12-14 09:45:33,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:45:33,852 INFO L225 Difference]: With dead ends: 515 [2022-12-14 09:45:33,852 INFO L226 Difference]: Without dead ends: 446 [2022-12-14 09:45:33,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 220 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=735, Invalid=1335, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 09:45:33,853 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 406 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:45:33,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 84 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:45:33,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-12-14 09:45:33,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 147. [2022-12-14 09:45:33,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 143 states have (on average 1.0909090909090908) internal successors, (156), 143 states have internal predecessors, (156), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:45:33,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 160 transitions. [2022-12-14 09:45:33,948 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 160 transitions. Word has length 86 [2022-12-14 09:45:33,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:45:33,949 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 160 transitions. [2022-12-14 09:45:33,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 09:45:33,949 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 160 transitions. [2022-12-14 09:45:33,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 09:45:33,951 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:45:33,951 INFO L195 NwaCegarLoop]: trace histogram [110, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:45:33,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 09:45:34,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:34,152 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:45:34,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:45:34,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1436130778, now seen corresponding path program 8 times [2022-12-14 09:45:34,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:45:34,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335024044] [2022-12-14 09:45:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:34,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:45:34,280 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:45:34,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200563511] [2022-12-14 09:45:34,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:45:34,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:34,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:45:34,281 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:45:34,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 09:45:34,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 09:45:34,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:45:34,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 09:45:34,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:45:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6610 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 6593 trivial. 0 not checked. [2022-12-14 09:45:34,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:45:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6610 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6593 trivial. 0 not checked. [2022-12-14 09:45:34,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:45:34,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335024044] [2022-12-14 09:45:34,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:45:34,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200563511] [2022-12-14 09:45:34,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200563511] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:45:34,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [103847340] [2022-12-14 09:45:34,701 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:45:34,701 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:45:34,702 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:45:34,702 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:45:34,702 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:45:34,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:34,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:34,761 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 09:45:34,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 09:45:34,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:34,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:34,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2022-12-14 09:45:34,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:34,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-12-14 09:45:34,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:34,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:34,967 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-12-14 09:45:34,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 391 treesize of output 384 [2022-12-14 09:45:35,064 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:35,107 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 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-14 09:45:35,126 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:35,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:35,172 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-12-14 09:45:35,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-12-14 09:45:35,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:35,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:35,249 INFO L321 Elim1Store]: treesize reduction 106, result has 39.1 percent of original size [2022-12-14 09:45:35,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 157 [2022-12-14 09:45:35,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:35,319 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:35,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:35,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:35,348 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:35,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:35,430 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:35,451 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:35,469 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:35,500 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-12-14 09:45:35,529 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:45:36,249 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6389#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-12-14 09:45:36,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:45:36,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:45:36,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-12-14 09:45:36,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364593467] [2022-12-14 09:45:36,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:45:36,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:45:36,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:45:36,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:45:36,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-12-14 09:45:36,251 INFO L87 Difference]: Start difference. First operand 147 states and 160 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 09:45:36,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:45:36,436 INFO L93 Difference]: Finished difference Result 192 states and 225 transitions. [2022-12-14 09:45:36,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:45:36,436 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 146 [2022-12-14 09:45:36,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:45:36,437 INFO L225 Difference]: With dead ends: 192 [2022-12-14 09:45:36,437 INFO L226 Difference]: Without dead ends: 175 [2022-12-14 09:45:36,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 418 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-12-14 09:45:36,438 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:45:36,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 22 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:45:36,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-12-14 09:45:36,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 168. [2022-12-14 09:45:36,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 164 states have (on average 1.0975609756097562) internal successors, (180), 164 states have internal predecessors, (180), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:45:36,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 184 transitions. [2022-12-14 09:45:36,592 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 184 transitions. Word has length 146 [2022-12-14 09:45:36,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:45:36,592 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 184 transitions. [2022-12-14 09:45:36,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 09:45:36,592 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 184 transitions. [2022-12-14 09:45:36,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 09:45:36,594 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:45:36,594 INFO L195 NwaCegarLoop]: trace histogram [110, 16, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:45:36,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 09:45:36,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 09:45:36,796 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:45:36,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:45:36,797 INFO L85 PathProgramCache]: Analyzing trace with hash 163083022, now seen corresponding path program 9 times [2022-12-14 09:45:36,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:45:36,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717698415] [2022-12-14 09:45:36,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:36,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:45:36,873 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:45:36,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168018365] [2022-12-14 09:45:36,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:45:36,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:36,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:45:36,874 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:45:36,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 09:45:38,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:45:38,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:45:38,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 1258 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 09:45:38,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:45:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6772 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 6683 trivial. 0 not checked. [2022-12-14 09:45:38,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:45:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6772 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 6683 trivial. 0 not checked. [2022-12-14 09:45:38,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:45:38,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717698415] [2022-12-14 09:45:38,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:45:38,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168018365] [2022-12-14 09:45:38,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168018365] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:45:38,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1232360086] [2022-12-14 09:45:38,340 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:45:38,340 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:45:38,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:45:38,341 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:45:38,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:45:38,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:38,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:38,399 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 09:45:38,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 09:45:38,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:38,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:38,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2022-12-14 09:45:38,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:38,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-12-14 09:45:38,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:38,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:38,629 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-12-14 09:45:38,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 399 treesize of output 382 [2022-12-14 09:45:38,698 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:38,758 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:38,777 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:38,800 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:38,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:38,848 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:38,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:38,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:38,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:38,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:38,914 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-12-14 09:45:38,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 141 [2022-12-14 09:45:38,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:38,964 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:38,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:38,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:38,992 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:38,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:39,074 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:39,094 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:39,111 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:39,146 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-12-14 09:45:39,176 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:45:39,914 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8051#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-12-14 09:45:39,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:45:39,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:45:39,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-12-14 09:45:39,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007894943] [2022-12-14 09:45:39,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:45:39,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 09:45:39,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:45:39,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 09:45:39,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2022-12-14 09:45:39,915 INFO L87 Difference]: Start difference. First operand 168 states and 184 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 09:45:40,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:45:40,226 INFO L93 Difference]: Finished difference Result 264 states and 315 transitions. [2022-12-14 09:45:40,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 09:45:40,227 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 158 [2022-12-14 09:45:40,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:45:40,227 INFO L225 Difference]: With dead ends: 264 [2022-12-14 09:45:40,227 INFO L226 Difference]: Without dead ends: 229 [2022-12-14 09:45:40,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 448 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2022-12-14 09:45:40,228 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 113 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:45:40,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 45 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:45:40,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-12-14 09:45:40,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 210. [2022-12-14 09:45:40,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 206 states have (on average 1.1067961165048543) internal successors, (228), 206 states have internal predecessors, (228), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:45:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 232 transitions. [2022-12-14 09:45:40,372 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 232 transitions. Word has length 158 [2022-12-14 09:45:40,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:45:40,372 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 232 transitions. [2022-12-14 09:45:40,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 09:45:40,372 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 232 transitions. [2022-12-14 09:45:40,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-12-14 09:45:40,373 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:45:40,373 INFO L195 NwaCegarLoop]: trace histogram [110, 40, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:45:40,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 09:45:40,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 09:45:40,574 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:45:40,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:45:40,575 INFO L85 PathProgramCache]: Analyzing trace with hash 927240206, now seen corresponding path program 10 times [2022-12-14 09:45:40,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:45:40,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610152386] [2022-12-14 09:45:40,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:40,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:45:40,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:45:40,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964595571] [2022-12-14 09:45:40,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:45:40,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:40,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:45:40,678 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:45:40,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 09:45:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:45:40,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 1426 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 09:45:40,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:45:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7528 backedges. 2121 proven. 253 refuted. 0 times theorem prover too weak. 5154 trivial. 0 not checked. [2022-12-14 09:45:41,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:45:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7528 backedges. 2121 proven. 253 refuted. 0 times theorem prover too weak. 5154 trivial. 0 not checked. [2022-12-14 09:45:41,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:45:41,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610152386] [2022-12-14 09:45:41,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:45:41,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964595571] [2022-12-14 09:45:41,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964595571] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:45:41,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [923573718] [2022-12-14 09:45:41,570 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:45:41,570 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:45:41,570 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:45:41,571 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:45:41,571 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:45:41,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:41,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:41,626 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 09:45:41,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 09:45:41,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:41,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:41,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2022-12-14 09:45:41,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:41,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-12-14 09:45:41,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:41,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:45:41,836 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-12-14 09:45:41,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 399 treesize of output 382 [2022-12-14 09:45:41,901 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:41,945 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 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-14 09:45:41,971 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:42,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:42,025 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-12-14 09:45:42,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-12-14 09:45:42,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:42,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:42,104 INFO L321 Elim1Store]: treesize reduction 106, result has 39.1 percent of original size [2022-12-14 09:45:42,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 157 [2022-12-14 09:45:42,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:42,170 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:42,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:42,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:45:42,198 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:45:42,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:45:42,277 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:42,311 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:42,332 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:45:42,363 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-12-14 09:45:42,391 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:45:43,440 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10100#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-12-14 09:45:43,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:45:43,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:45:43,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-12-14 09:45:43,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140090069] [2022-12-14 09:45:43,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:45:43,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 09:45:43,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:45:43,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 09:45:43,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2058, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 09:45:43,444 INFO L87 Difference]: Start difference. First operand 210 states and 232 transitions. Second operand has 50 states, 50 states have (on average 1.3) internal successors, (65), 50 states have internal predecessors, (65), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 09:45:45,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:45:45,714 INFO L93 Difference]: Finished difference Result 1037 states and 1406 transitions. [2022-12-14 09:45:45,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 09:45:45,715 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.3) internal successors, (65), 50 states have internal predecessors, (65), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 182 [2022-12-14 09:45:45,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:45:45,716 INFO L225 Difference]: With dead ends: 1037 [2022-12-14 09:45:45,716 INFO L226 Difference]: Without dead ends: 857 [2022-12-14 09:45:45,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 484 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2583, Invalid=4059, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 09:45:45,718 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 996 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 963 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 963 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:45:45,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [996 Valid, 154 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [963 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 09:45:45,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-12-14 09:45:45,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 330. [2022-12-14 09:45:45,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 326 states have (on average 1.0674846625766872) internal successors, (348), 326 states have internal predecessors, (348), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:45:45,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 352 transitions. [2022-12-14 09:45:45,940 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 352 transitions. Word has length 182 [2022-12-14 09:45:45,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:45:45,940 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 352 transitions. [2022-12-14 09:45:45,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.3) internal successors, (65), 50 states have internal predecessors, (65), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 09:45:45,940 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 352 transitions. [2022-12-14 09:45:45,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-12-14 09:45:45,943 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:45:45,943 INFO L195 NwaCegarLoop]: trace histogram [230, 40, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:45:45,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 09:45:46,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 09:45:46,144 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:45:46,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:45:46,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1947309426, now seen corresponding path program 11 times [2022-12-14 09:45:46,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:45:46,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626212153] [2022-12-14 09:45:46,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:45:46,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:45:46,355 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:45:46,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152119551] [2022-12-14 09:45:46,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:45:46,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:45:46,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:45:46,356 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:45:46,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 09:46:17,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-12-14 09:46:17,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:46:17,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 09:46:17,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:46:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 28468 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 28046 trivial. 0 not checked. [2022-12-14 09:46:17,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:46:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 28468 backedges. 4 proven. 418 refuted. 0 times theorem prover too weak. 28046 trivial. 0 not checked. [2022-12-14 09:46:17,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:46:17,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626212153] [2022-12-14 09:46:17,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:46:17,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152119551] [2022-12-14 09:46:17,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152119551] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:46:17,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [779555631] [2022-12-14 09:46:17,739 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:46:17,739 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:46:17,739 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:46:17,739 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:46:17,739 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:46:17,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:46:17,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:46:17,782 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 09:46:17,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 09:46:17,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:46:17,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:46:17,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2022-12-14 09:46:17,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:46:17,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-12-14 09:46:17,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:46:17,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:46:17,995 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-12-14 09:46:17,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 391 treesize of output 384 [2022-12-14 09:46:18,088 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:46:18,144 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 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-14 09:46:18,162 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:46:18,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:46:18,206 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:46:18,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:46:18,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:46:18,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:46:18,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:46:18,256 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-12-14 09:46:18,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 141 [2022-12-14 09:46:18,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:46:18,294 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:46:18,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:46:18,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:46:18,321 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:46:18,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:46:18,399 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 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-14 09:46:18,427 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:46:18,456 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-12-14 09:46:18,481 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:46:19,375 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14550#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-12-14 09:46:19,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:46:19,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:46:19,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-12-14 09:46:19,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824849264] [2022-12-14 09:46:19,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:46:19,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 09:46:19,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:46:19,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 09:46:19,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 09:46:19,377 INFO L87 Difference]: Start difference. First operand 330 states and 352 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 09:46:20,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:46:20,140 INFO L93 Difference]: Finished difference Result 528 states and 615 transitions. [2022-12-14 09:46:20,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 09:46:20,141 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 302 [2022-12-14 09:46:20,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:46:20,142 INFO L225 Difference]: With dead ends: 528 [2022-12-14 09:46:20,142 INFO L226 Difference]: Without dead ends: 457 [2022-12-14 09:46:20,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 915 GetRequests, 868 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=735, Invalid=1335, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 09:46:20,143 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 318 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:46:20,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 79 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:46:20,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-12-14 09:46:20,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 414. [2022-12-14 09:46:20,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 410 states have (on average 1.0829268292682928) internal successors, (444), 410 states have internal predecessors, (444), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:46:20,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 448 transitions. [2022-12-14 09:46:20,469 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 448 transitions. Word has length 302 [2022-12-14 09:46:20,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:46:20,470 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 448 transitions. [2022-12-14 09:46:20,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 09:46:20,470 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 448 transitions. [2022-12-14 09:46:20,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-12-14 09:46:20,471 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:46:20,471 INFO L195 NwaCegarLoop]: trace histogram [230, 88, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:46:20,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 09:46:20,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:46:20,673 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:46:20,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:46:20,674 INFO L85 PathProgramCache]: Analyzing trace with hash 732382350, now seen corresponding path program 12 times [2022-12-14 09:46:20,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:46:20,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469156217] [2022-12-14 09:46:20,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:46:20,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:46:20,796 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:46:20,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335412275] [2022-12-14 09:46:20,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:46:20,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:46:20,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:46:20,797 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:46:20,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 09:53:03,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:53:03,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:53:03,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 2842 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 09:53:03,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:53:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 31708 backedges. 2651 proven. 253 refuted. 0 times theorem prover too weak. 28804 trivial. 0 not checked. [2022-12-14 09:53:03,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:53:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 31708 backedges. 2122 proven. 782 refuted. 0 times theorem prover too weak. 28804 trivial. 0 not checked. [2022-12-14 09:53:04,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:53:04,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469156217] [2022-12-14 09:53:04,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:53:04,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335412275] [2022-12-14 09:53:04,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335412275] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:53:04,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1457548351] [2022-12-14 09:53:04,444 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:53:04,444 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:53:04,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:53:04,445 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:53:04,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:53:04,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:53:04,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:53:04,499 INFO L321 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2022-12-14 09:53:04,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 09:53:04,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:53:04,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:53:04,567 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 09:53:04,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 09:53:04,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:53:04,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-12-14 09:53:04,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:53:04,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:53:04,790 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-12-14 09:53:04,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 399 treesize of output 382 [2022-12-14 09:53:04,859 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:53:04,910 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 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-14 09:53:04,937 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:53:04,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:53:04,988 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-12-14 09:53:04,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-12-14 09:53:05,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:53:05,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:53:05,085 INFO L321 Elim1Store]: treesize reduction 116, result has 33.3 percent of original size [2022-12-14 09:53:05,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 147 [2022-12-14 09:53:05,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:53:05,141 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:53:05,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:53:05,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:53:05,175 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:53:05,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:53:05,269 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 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-14 09:53:05,291 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:53:05,328 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-12-14 09:53:05,367 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:53:06,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18501#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-12-14 09:53:06,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:53:06,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:53:06,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-12-14 09:53:06,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291698930] [2022-12-14 09:53:06,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:53:06,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 09:53:06,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:53:06,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 09:53:06,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2058, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 09:53:06,496 INFO L87 Difference]: Start difference. First operand 414 states and 448 transitions. Second operand has 50 states, 50 states have (on average 1.5) internal successors, (75), 50 states have internal predecessors, (75), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 09:53:08,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:53:08,111 INFO L93 Difference]: Finished difference Result 816 states and 975 transitions. [2022-12-14 09:53:08,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 09:53:08,111 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.5) internal successors, (75), 50 states have internal predecessors, (75), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 350 [2022-12-14 09:53:08,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:53:08,113 INFO L225 Difference]: With dead ends: 816 [2022-12-14 09:53:08,113 INFO L226 Difference]: Without dead ends: 673 [2022-12-14 09:53:08,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1071 GetRequests, 988 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2583, Invalid=4059, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 09:53:08,114 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 779 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:53:08,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 152 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:53:08,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-12-14 09:53:08,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 582. [2022-12-14 09:53:08,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 578 states have (on average 1.1003460207612457) internal successors, (636), 578 states have internal predecessors, (636), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:53:08,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 640 transitions. [2022-12-14 09:53:08,666 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 640 transitions. Word has length 350 [2022-12-14 09:53:08,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:53:08,666 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 640 transitions. [2022-12-14 09:53:08,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.5) internal successors, (75), 50 states have internal predecessors, (75), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 09:53:08,666 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 640 transitions. [2022-12-14 09:53:08,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-12-14 09:53:08,668 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:53:08,668 INFO L195 NwaCegarLoop]: trace histogram [230, 184, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:53:08,868 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forcibly destroying the process [2022-12-14 09:53:08,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 137 [2022-12-14 09:53:08,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 09:53:08,925 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:53:08,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:53:08,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1268217998, now seen corresponding path program 13 times [2022-12-14 09:53:08,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:53:08,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139168326] [2022-12-14 09:53:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:53:08,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:53:09,014 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:53:09,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802392157] [2022-12-14 09:53:09,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:53:09,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:53:09,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:53:09,015 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:53:09,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 09:53:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:53:09,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 3514 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 09:53:09,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:53:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 45100 backedges. 8841 proven. 1081 refuted. 0 times theorem prover too weak. 35178 trivial. 0 not checked. [2022-12-14 09:53:10,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:53:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 45100 backedges. 8841 proven. 1081 refuted. 0 times theorem prover too weak. 35178 trivial. 0 not checked. [2022-12-14 09:53:12,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:53:12,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139168326] [2022-12-14 09:53:12,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:53:12,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802392157] [2022-12-14 09:53:12,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802392157] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:53:12,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [279993565] [2022-12-14 09:53:12,357 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:53:12,357 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:53:12,358 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:53:12,358 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:53:12,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:53:12,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:53:12,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:53:12,411 INFO L321 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2022-12-14 09:53:12,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 09:53:12,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:53:12,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:53:12,476 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-12-14 09:53:12,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-12-14 09:53:12,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:53:12,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-12-14 09:53:12,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:53:12,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:53:12,678 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-12-14 09:53:12,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 399 treesize of output 382 [2022-12-14 09:53:12,734 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:53:12,784 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:53:12,814 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:53:12,831 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:53:12,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:53:12,872 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:53:12,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:53:12,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:53:12,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:53:12,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:53:12,938 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-12-14 09:53:12,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 141 [2022-12-14 09:53:12,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:53:12,978 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:53:12,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:53:13,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:53:13,009 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-12-14 09:53:13,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-12-14 09:53:13,096 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 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-14 09:53:13,130 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 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:53:13,164 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-12-14 09:53:13,196 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:53:14,538 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23904#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-12-14 09:53:14,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:53:14,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:53:14,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-12-14 09:53:14,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606072280] [2022-12-14 09:53:14,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:53:14,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-12-14 09:53:14,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:53:14,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-12-14 09:53:14,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4988, Invalid=6354, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 09:53:14,547 INFO L87 Difference]: Start difference. First operand 582 states and 640 transitions. Second operand has 98 states, 98 states have (on average 1.153061224489796) internal successors, (113), 98 states have internal predecessors, (113), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 09:53:22,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:53:22,376 INFO L93 Difference]: Finished difference Result 2117 states and 2714 transitions. [2022-12-14 09:53:22,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-12-14 09:53:22,376 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.153061224489796) internal successors, (113), 98 states have internal predecessors, (113), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 446 [2022-12-14 09:53:22,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:53:22,379 INFO L225 Difference]: With dead ends: 2117 [2022-12-14 09:53:22,379 INFO L226 Difference]: Without dead ends: 1589 [2022-12-14 09:53:22,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1383 GetRequests, 1228 SyntacticMatches, 3 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6876 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9735, Invalid=13827, Unknown=0, NotChecked=0, Total=23562 [2022-12-14 09:53:22,383 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2320 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 1663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2320 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1663 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:53:22,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2320 Valid, 299 Invalid, 2180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1663 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 09:53:22,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2022-12-14 09:53:23,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 822. [2022-12-14 09:53:23,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 818 states have (on average 1.0709046454767726) internal successors, (876), 818 states have internal predecessors, (876), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:53:23,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 880 transitions. [2022-12-14 09:53:23,078 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 880 transitions. Word has length 446 [2022-12-14 09:53:23,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:53:23,079 INFO L495 AbstractCegarLoop]: Abstraction has 822 states and 880 transitions. [2022-12-14 09:53:23,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.153061224489796) internal successors, (113), 98 states have internal predecessors, (113), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 09:53:23,079 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 880 transitions. [2022-12-14 09:53:23,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2022-12-14 09:53:23,082 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:53:23,082 INFO L195 NwaCegarLoop]: trace histogram [470, 184, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:53:23,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 09:53:23,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 09:53:23,283 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:53:23,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:53:23,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1669639566, now seen corresponding path program 14 times [2022-12-14 09:53:23,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:53:23,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632513861] [2022-12-14 09:53:23,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:53:23,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:53:23,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:53:23,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820993146] [2022-12-14 09:53:23,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:53:23,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:53:23,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:53:23,488 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:53:23,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd18958-39b1-490c-9fe5-74721f2c257a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process