./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy6_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy6_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI --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 9e07c08b08b04587ccec5205fe357151301abec81845a5f3a121e5979e6bfacf --- 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-5e519f3 [2022-11-03 03:57:41,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:57:41,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:57:41,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:57:41,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:57:41,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:57:41,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:57:41,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:57:41,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:57:41,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:57:41,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:57:41,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:57:41,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:57:41,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:57:41,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:57:41,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:57:41,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:57:41,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:57:42,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:57:42,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:57:42,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:57:42,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:57:42,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:57:42,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:57:42,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:57:42,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:57:42,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:57:42,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:57:42,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:57:42,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:57:42,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:57:42,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:57:42,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:57:42,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:57:42,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:57:42,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:57:42,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:57:42,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:57:42,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:57:42,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:57:42,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:57:42,029 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:57:42,057 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:57:42,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:57:42,058 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:57:42,058 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:57:42,059 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:57:42,059 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:57:42,060 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:57:42,060 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:57:42,060 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:57:42,061 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:57:42,061 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:57:42,061 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:57:42,062 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:57:42,062 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:57:42,062 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:57:42,063 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:57:42,063 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:57:42,063 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:57:42,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:57:42,065 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:57:42,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:57:42,065 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:57:42,065 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:57:42,066 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:57:42,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:57:42,066 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:57:42,067 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:57:42,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:57:42,067 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:57:42,067 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:57:42,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:57:42,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:57:42,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:57:42,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:57:42,069 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:57:42,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:57:42,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:57:42,070 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:57:42,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:57:42,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:57:42,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:57:42,071 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_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e07c08b08b04587ccec5205fe357151301abec81845a5f3a121e5979e6bfacf [2022-11-03 03:57:42,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:57:42,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:57:42,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:57:42,450 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:57:42,451 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:57:42,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-examples/standard_copy6_ground-1.i [2022-11-03 03:57:42,530 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/data/2651be258/b4f0323f4fa44ae7bc9fdc25011415bc/FLAGf6833c927 [2022-11-03 03:57:43,050 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:57:43,051 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/sv-benchmarks/c/array-examples/standard_copy6_ground-1.i [2022-11-03 03:57:43,058 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/data/2651be258/b4f0323f4fa44ae7bc9fdc25011415bc/FLAGf6833c927 [2022-11-03 03:57:43,421 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/data/2651be258/b4f0323f4fa44ae7bc9fdc25011415bc [2022-11-03 03:57:43,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:57:43,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:57:43,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:57:43,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:57:43,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:57:43,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:57:43" (1/1) ... [2022-11-03 03:57:43,442 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f29b320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:43, skipping insertion in model container [2022-11-03 03:57:43,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:57:43" (1/1) ... [2022-11-03 03:57:43,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:57:43,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:57:43,731 WARN L230 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_6ac86087-d4c7-4f83-88af-1c2d22fa564f/sv-benchmarks/c/array-examples/standard_copy6_ground-1.i[816,829] [2022-11-03 03:57:43,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:57:43,783 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:57:43,804 WARN L230 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_6ac86087-d4c7-4f83-88af-1c2d22fa564f/sv-benchmarks/c/array-examples/standard_copy6_ground-1.i[816,829] [2022-11-03 03:57:43,827 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:57:43,848 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:57:43,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:43 WrapperNode [2022-11-03 03:57:43,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:57:43,851 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:57:43,851 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:57:43,851 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:57:43,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:43" (1/1) ... [2022-11-03 03:57:43,886 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:43" (1/1) ... [2022-11-03 03:57:43,927 INFO L138 Inliner]: procedures = 16, calls = 44, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147 [2022-11-03 03:57:43,931 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:57:43,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:57:43,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:57:43,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:57:43,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:43" (1/1) ... [2022-11-03 03:57:43,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:43" (1/1) ... [2022-11-03 03:57:43,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:43" (1/1) ... [2022-11-03 03:57:43,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:43" (1/1) ... [2022-11-03 03:57:43,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:43" (1/1) ... [2022-11-03 03:57:43,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:43" (1/1) ... [2022-11-03 03:57:43,979 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:43" (1/1) ... [2022-11-03 03:57:43,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:43" (1/1) ... [2022-11-03 03:57:43,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:57:43,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:57:43,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:57:43,985 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:57:43,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:43" (1/1) ... [2022-11-03 03:57:44,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:57:44,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:44,039 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:57:44,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:57:44,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:57:44,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:57:44,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:57:44,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:57:44,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:57:44,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:57:44,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:57:44,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:57:44,203 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:57:44,205 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:57:44,546 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:57:44,638 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:57:44,638 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-03 03:57:44,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:57:44 BoogieIcfgContainer [2022-11-03 03:57:44,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:57:44,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:57:44,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:57:44,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:57:44,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:57:43" (1/3) ... [2022-11-03 03:57:44,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7252e589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:57:44, skipping insertion in model container [2022-11-03 03:57:44,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:57:43" (2/3) ... [2022-11-03 03:57:44,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7252e589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:57:44, skipping insertion in model container [2022-11-03 03:57:44,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:57:44" (3/3) ... [2022-11-03 03:57:44,652 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-1.i [2022-11-03 03:57:44,675 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:57:44,675 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:57:44,765 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:57:44,784 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;@402c813c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:57:44,784 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:57:44,789 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:44,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 03:57:44,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:44,798 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:44,799 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:44,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:44,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1059155307, now seen corresponding path program 1 times [2022-11-03 03:57:44,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:57:44,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938858575] [2022-11-03 03:57:44,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:44,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:57:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:45,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:57:45,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938858575] [2022-11-03 03:57:45,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938858575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:45,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:45,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:57:45,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538615904] [2022-11-03 03:57:45,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:45,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:57:45,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:57:45,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:57:45,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:57:45,430 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:45,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:45,513 INFO L93 Difference]: Finished difference Result 27 states and 43 transitions. [2022-11-03 03:57:45,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:57:45,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 03:57:45,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:45,526 INFO L225 Difference]: With dead ends: 27 [2022-11-03 03:57:45,527 INFO L226 Difference]: Without dead ends: 14 [2022-11-03 03:57:45,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:57:45,534 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:45,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:57:45,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-03 03:57:45,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-03 03:57:45,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:45,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2022-11-03 03:57:45,575 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 21 transitions. Word has length 11 [2022-11-03 03:57:45,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:45,576 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 21 transitions. [2022-11-03 03:57:45,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:45,577 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 21 transitions. [2022-11-03 03:57:45,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 03:57:45,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:45,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:45,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:57:45,580 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:45,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:45,581 INFO L85 PathProgramCache]: Analyzing trace with hash -648244413, now seen corresponding path program 1 times [2022-11-03 03:57:45,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:57:45,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025921258] [2022-11-03 03:57:45,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:45,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:57:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:45,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:57:45,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025921258] [2022-11-03 03:57:45,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025921258] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:57:45,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767595477] [2022-11-03 03:57:45,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:45,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:45,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:45,780 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:45,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:57:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:45,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:57:45,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:57:45,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:57:45,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767595477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:45,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:57:45,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-03 03:57:45,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121027100] [2022-11-03 03:57:45,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:45,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:57:45,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:57:45,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:57:45,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:57:45,976 INFO L87 Difference]: Start difference. First operand 14 states and 21 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:46,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:46,067 INFO L93 Difference]: Finished difference Result 30 states and 48 transitions. [2022-11-03 03:57:46,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:57:46,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 03:57:46,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:46,070 INFO L225 Difference]: With dead ends: 30 [2022-11-03 03:57:46,071 INFO L226 Difference]: Without dead ends: 20 [2022-11-03 03:57:46,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:57:46,082 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:46,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:57:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-03 03:57:46,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-03 03:57:46,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:46,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2022-11-03 03:57:46,093 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 12 [2022-11-03 03:57:46,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:46,093 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2022-11-03 03:57:46,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2022-11-03 03:57:46,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 03:57:46,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:46,095 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:46,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:46,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:46,296 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:46,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:46,296 INFO L85 PathProgramCache]: Analyzing trace with hash -331017239, now seen corresponding path program 1 times [2022-11-03 03:57:46,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:57:46,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068808754] [2022-11-03 03:57:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:46,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:57:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:46,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:57:46,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:57:46,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068808754] [2022-11-03 03:57:46,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068808754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:57:46,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609559216] [2022-11-03 03:57:46,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:46,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:46,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:46,424 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:46,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:57:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:46,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:57:46,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:57:46,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:57:46,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609559216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:46,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [367760500] [2022-11-03 03:57:46,730 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-03 03:57:46,731 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:57:46,736 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:57:46,743 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:57:46,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:57:46,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:46,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:46,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:46,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:46,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:47,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:47,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:47,627 INFO L356 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-11-03 03:57:47,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-11-03 03:57:47,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:47,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:47,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:47,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:47,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:47,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:47,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:47,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 43 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 52 [2022-11-03 03:57:47,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:47,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:47,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-03 03:57:48,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:48,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:48,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:48,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:48,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:48,797 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-03 03:57:48,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 684 treesize of output 674 [2022-11-03 03:57:50,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:50,615 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 03:57:50,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 03:57:50,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:50,662 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:57:50,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:57:50,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:50,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:50,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:50,745 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:57:50,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:57:50,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:50,840 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:57:50,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:57:50,904 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:57:50,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:57:50,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:50,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:51,061 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 03:57:51,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 129 [2022-11-03 03:57:51,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:51,198 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:57:51,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:57:51,237 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:57:51,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:57:51,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:51,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:51,412 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 03:57:51,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 129 [2022-11-03 03:57:51,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:51,593 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:57:51,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:57:51,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:51,653 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:57:51,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:57:51,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:51,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:51,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:51,749 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:57:51,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:57:51,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:51,839 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:57:51,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:57:51,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:51,903 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:57:51,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:57:51,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:51,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:51,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:51,979 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:57:51,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:57:52,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:52,053 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:57:52,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:57:52,092 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:57:52,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:57:52,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:52,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:52,213 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 03:57:52,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 129 [2022-11-03 03:57:52,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:52,313 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:57:52,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:57:52,344 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:57:52,765 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '319#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:57:52,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:57:52,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:57:52,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-03 03:57:52,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132715096] [2022-11-03 03:57:52,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:57:52,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:57:52,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:57:52,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:57:52,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:57:52,768 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:52,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:52,834 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-11-03 03:57:52,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:57:52,834 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-03 03:57:52,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:52,835 INFO L225 Difference]: With dead ends: 40 [2022-11-03 03:57:52,835 INFO L226 Difference]: Without dead ends: 23 [2022-11-03 03:57:52,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:57:52,837 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:52,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:57:52,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-03 03:57:52,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-03 03:57:52,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:52,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-11-03 03:57:52,844 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 18 [2022-11-03 03:57:52,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:52,844 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-11-03 03:57:52,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:52,845 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-11-03 03:57:52,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 03:57:52,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:52,846 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:52,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:53,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:53,074 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:53,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:53,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1000203793, now seen corresponding path program 2 times [2022-11-03 03:57:53,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:57:53,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43249643] [2022-11-03 03:57:53,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:53,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:57:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:57:53,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:57:53,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43249643] [2022-11-03 03:57:53,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43249643] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:57:53,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379646154] [2022-11-03 03:57:53,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:57:53,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:53,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:53,335 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:53,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:57:53,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:57:53,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:57:53,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:57:53,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:57:53,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:57:53,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379646154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:53,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1516470464] [2022-11-03 03:57:53,566 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-03 03:57:53,566 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:57:53,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:57:53,567 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:57:53,567 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:57:53,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:53,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:53,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:53,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:53,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:53,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:53,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:54,161 INFO L356 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-11-03 03:57:54,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-11-03 03:57:54,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:54,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:54,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:54,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:54,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:54,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:54,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:54,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 43 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 52 [2022-11-03 03:57:54,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:54,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:54,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-03 03:57:54,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:54,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:54,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:54,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:54,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:54,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:54,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:54,801 INFO L356 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-03 03:57:54,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 704 treesize of output 672 [2022-11-03 03:57:55,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:55,111 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 03:57:55,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 03:57:55,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:55,168 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:57:55,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:57:55,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:55,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:55,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:55,239 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:57:55,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:57:55,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:55,347 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:57:55,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:57:55,415 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:57:55,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:57:55,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:55,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:55,528 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 03:57:55,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 129 [2022-11-03 03:57:55,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:55,628 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:57:55,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:57:55,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:55,683 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:57:55,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:57:55,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:55,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:55,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:55,769 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:57:55,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:57:55,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:55,842 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:57:55,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:57:55,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:55,889 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:57:55,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:57:55,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:55,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:55,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:55,953 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:57:55,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:57:56,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:56,037 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:57:56,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:57:56,097 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:57:56,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:57:56,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:56,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:56,221 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 03:57:56,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 129 [2022-11-03 03:57:56,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:56,316 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:57:56,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:57:56,355 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:57:56,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:57:56,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:56,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:56,494 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 03:57:56,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 129 [2022-11-03 03:57:56,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:56,631 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:57:56,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:57:56,654 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:57:57,143 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '563#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:57:57,144 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:57:57,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:57:57,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-03 03:57:57,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870322225] [2022-11-03 03:57:57,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:57:57,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:57:57,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:57:57,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:57:57,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:57:57,146 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:57,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:57,271 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2022-11-03 03:57:57,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:57:57,272 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-03 03:57:57,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:57,273 INFO L225 Difference]: With dead ends: 56 [2022-11-03 03:57:57,273 INFO L226 Difference]: Without dead ends: 41 [2022-11-03 03:57:57,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:57:57,275 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:57,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:57:57,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-03 03:57:57,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-03 03:57:57,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:57,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2022-11-03 03:57:57,282 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 21 [2022-11-03 03:57:57,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:57,283 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2022-11-03 03:57:57,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:57,283 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-11-03 03:57:57,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 03:57:57,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:57,284 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:57,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:57,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-03 03:57:57,509 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:57,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:57,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1063405291, now seen corresponding path program 3 times [2022-11-03 03:57:57,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:57:57,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500603684] [2022-11-03 03:57:57,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:57,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:57:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 03:57:57,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:57:57,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500603684] [2022-11-03 03:57:57,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500603684] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:57:57,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564452403] [2022-11-03 03:57:57,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:57:57,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:57,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:57,770 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:57,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:57:57,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:57:57,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:57:57,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:57:57,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 03:57:57,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 03:57:58,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564452403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:58,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1093074124] [2022-11-03 03:57:58,067 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-03 03:57:58,068 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:57:58,068 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:57:58,068 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:57:58,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:57:58,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:58,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:58,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:58,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:58,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:58,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:58,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:58,418 INFO L356 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2022-11-03 03:57:58,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2022-11-03 03:57:58,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:58,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:58,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:58,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:58,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:58,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:58,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:58,933 INFO L356 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-11-03 03:57:58,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-11-03 03:57:59,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:59,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:59,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-03 03:57:59,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:59,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:59,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:59,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:59,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:59,410 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-03 03:57:59,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 684 treesize of output 674 [2022-11-03 03:58:00,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:00,490 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 03:58:00,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 03:58:00,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:00,535 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:00,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:00,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:00,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:00,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:00,613 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:58:00,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:58:00,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:00,713 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:00,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:00,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:00,776 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:00,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:00,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:00,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:00,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:00,833 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:58:00,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:58:00,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:00,937 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:00,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:01,016 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:58:01,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:58:01,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:01,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:01,115 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 03:58:01,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 119 [2022-11-03 03:58:01,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:01,222 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:01,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:01,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:01,260 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:01,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:01,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:01,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:01,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:01,327 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:58:01,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:58:01,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:01,405 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:01,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:01,461 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:58:01,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:58:01,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:01,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:01,580 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 03:58:01,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 119 [2022-11-03 03:58:01,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:01,696 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:01,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:01,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:01,734 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:01,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:01,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:01,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:01,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:01,806 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:58:01,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:58:01,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:01,880 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:01,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:01,898 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:58:02,277 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '989#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:58:02,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:58:02,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:58:02,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-03 03:58:02,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386614061] [2022-11-03 03:58:02,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:58:02,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 03:58:02,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:02,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 03:58:02,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:58:02,280 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:02,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:02,373 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2022-11-03 03:58:02,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:58:02,373 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-03 03:58:02,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:02,374 INFO L225 Difference]: With dead ends: 82 [2022-11-03 03:58:02,374 INFO L226 Difference]: Without dead ends: 47 [2022-11-03 03:58:02,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:58:02,376 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:02,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:58:02,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-03 03:58:02,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-03 03:58:02,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-11-03 03:58:02,382 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 39 [2022-11-03 03:58:02,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:02,383 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-11-03 03:58:02,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:02,383 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-11-03 03:58:02,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 03:58:02,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:02,384 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:58:02,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:02,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:02,585 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:02,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:02,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1024767979, now seen corresponding path program 4 times [2022-11-03 03:58:02,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:02,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46653285] [2022-11-03 03:58:02,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:02,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 03:58:03,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:03,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46653285] [2022-11-03 03:58:03,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46653285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:03,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841180918] [2022-11-03 03:58:03,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:58:03,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:03,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:03,079 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:03,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:58:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:03,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:58:03,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:03,342 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 03:58:03,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 03:58:03,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841180918] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:03,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [389992403] [2022-11-03 03:58:03,582 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-03 03:58:03,582 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:58:03,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:58:03,583 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:58:03,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:58:03,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:03,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:03,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:03,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:03,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:03,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:03,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:04,103 INFO L356 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-11-03 03:58:04,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-11-03 03:58:04,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:04,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:04,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:04,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:04,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:04,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:04,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:04,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 43 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 52 [2022-11-03 03:58:04,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:04,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:04,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-03 03:58:04,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:04,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:04,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:04,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:04,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:04,635 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-03 03:58:04,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 684 treesize of output 674 [2022-11-03 03:58:05,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:05,956 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 03:58:05,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 03:58:05,992 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:58:05,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:58:06,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:06,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:06,099 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 03:58:06,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 119 [2022-11-03 03:58:06,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:06,202 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:06,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:06,235 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:58:06,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:58:06,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:06,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:06,326 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 03:58:06,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 119 [2022-11-03 03:58:06,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:06,419 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:06,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:06,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:06,453 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:06,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:06,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:06,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:06,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:06,521 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:58:06,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:58:06,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:06,578 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:06,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:06,609 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:58:06,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:58:06,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:06,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:06,735 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 03:58:06,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 119 [2022-11-03 03:58:06,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:06,832 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:06,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:06,874 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:58:06,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:58:06,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:06,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:06,990 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 03:58:06,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 119 [2022-11-03 03:58:07,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:07,093 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:07,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:07,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:07,126 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:07,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:07,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:07,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:07,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:07,199 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:58:07,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:58:07,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:07,262 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:07,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:07,286 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:58:07,628 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1527#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:58:07,628 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:58:07,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:58:07,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-03 03:58:07,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673256495] [2022-11-03 03:58:07,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:58:07,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 03:58:07,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:07,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 03:58:07,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:58:07,631 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:07,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:07,749 INFO L93 Difference]: Finished difference Result 94 states and 119 transitions. [2022-11-03 03:58:07,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 03:58:07,750 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-03 03:58:07,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:07,751 INFO L225 Difference]: With dead ends: 94 [2022-11-03 03:58:07,751 INFO L226 Difference]: Without dead ends: 59 [2022-11-03 03:58:07,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:58:07,753 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:07,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:58:07,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-03 03:58:07,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-11-03 03:58:07,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:07,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-11-03 03:58:07,762 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 45 [2022-11-03 03:58:07,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:07,762 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-11-03 03:58:07,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:07,763 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-11-03 03:58:07,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 03:58:07,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:07,765 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:58:07,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:07,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:07,973 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:07,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:07,974 INFO L85 PathProgramCache]: Analyzing trace with hash 637491691, now seen corresponding path program 5 times [2022-11-03 03:58:07,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:07,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152344093] [2022-11-03 03:58:07,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:07,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 03:58:09,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:09,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152344093] [2022-11-03 03:58:09,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152344093] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:09,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493141413] [2022-11-03 03:58:09,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:58:09,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:09,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:09,090 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:09,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:58:09,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:58:09,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:58:09,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:58:09,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2022-11-03 03:58:09,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2022-11-03 03:58:09,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493141413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:09,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1022883538] [2022-11-03 03:58:09,729 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-03 03:58:09,729 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:58:09,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:58:09,729 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:58:09,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:58:09,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:09,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:09,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:09,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:09,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:09,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:09,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:10,052 INFO L356 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2022-11-03 03:58:10,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2022-11-03 03:58:10,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:10,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:10,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:10,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:10,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:10,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:10,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:10,591 INFO L356 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-11-03 03:58:10,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-11-03 03:58:10,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:10,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:10,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-03 03:58:11,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:11,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:11,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:11,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:11,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:11,205 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-03 03:58:11,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 684 treesize of output 674 [2022-11-03 03:58:12,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:12,386 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 03:58:12,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 03:58:12,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:12,424 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:12,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:12,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:12,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:12,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:12,484 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:58:12,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:58:12,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:12,561 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:12,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:12,619 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:58:12,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:58:12,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:12,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:12,723 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 03:58:12,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 129 [2022-11-03 03:58:12,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:12,855 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:12,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:12,890 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:58:12,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:58:12,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:12,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:13,002 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 03:58:13,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 119 [2022-11-03 03:58:13,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:13,088 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:13,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:13,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:13,123 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:13,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:13,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:13,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:13,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:13,191 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:58:13,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:58:13,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:13,273 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:13,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:13,328 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:58:13,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:58:13,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:13,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:13,438 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 03:58:13,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 119 [2022-11-03 03:58:13,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:13,539 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:13,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:13,568 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:58:13,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:58:13,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:13,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:13,676 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 03:58:13,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 129 [2022-11-03 03:58:13,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:13,842 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:13,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:13,860 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:58:14,386 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2195#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:58:14,386 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:58:14,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:58:14,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-03 03:58:14,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300994672] [2022-11-03 03:58:14,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:58:14,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 03:58:14,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:14,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 03:58:14,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 03:58:14,390 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:14,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:14,731 INFO L93 Difference]: Finished difference Result 131 states and 181 transitions. [2022-11-03 03:58:14,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 03:58:14,732 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-03 03:58:14,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:14,733 INFO L225 Difference]: With dead ends: 131 [2022-11-03 03:58:14,733 INFO L226 Difference]: Without dead ends: 96 [2022-11-03 03:58:14,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 03:58:14,735 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:14,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:58:14,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-03 03:58:14,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-11-03 03:58:14,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 95 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:14,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2022-11-03 03:58:14,748 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 57 [2022-11-03 03:58:14,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:14,748 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2022-11-03 03:58:14,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:14,748 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2022-11-03 03:58:14,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 03:58:14,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:14,750 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:58:14,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:14,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:14,975 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:14,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:14,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1002141443, now seen corresponding path program 6 times [2022-11-03 03:58:14,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:14,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739951432] [2022-11-03 03:58:14,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:14,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-11-03 03:58:16,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:16,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739951432] [2022-11-03 03:58:16,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739951432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:16,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641901086] [2022-11-03 03:58:16,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:58:16,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:16,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:16,437 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:16,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:58:16,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:58:16,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:58:16,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 03:58:16,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-11-03 03:58:16,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:17,789 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-11-03 03:58:17,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641901086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:17,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1376719240] [2022-11-03 03:58:17,792 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-03 03:58:17,792 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:58:17,792 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:58:17,793 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:58:17,793 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:58:17,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:17,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:17,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:17,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:17,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:17,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:17,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:18,117 INFO L356 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2022-11-03 03:58:18,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2022-11-03 03:58:18,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:18,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:18,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:18,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:18,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:18,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:18,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:18,629 INFO L356 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-11-03 03:58:18,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-11-03 03:58:18,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:18,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:18,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-03 03:58:19,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:19,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:19,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:19,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:19,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:19,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:19,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:19,059 INFO L356 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-03 03:58:19,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 704 treesize of output 672 [2022-11-03 03:58:19,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:19,270 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 03:58:19,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 03:58:19,326 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:58:19,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:58:19,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:19,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:19,440 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 03:58:19,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 119 [2022-11-03 03:58:19,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:19,526 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:19,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:19,563 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:58:19,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:58:19,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:19,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:19,659 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 03:58:19,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 119 [2022-11-03 03:58:19,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:19,747 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:19,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:19,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:19,786 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:19,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:19,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:19,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:19,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:19,850 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:58:19,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:58:19,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:19,907 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:19,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:19,942 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:58:19,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:58:19,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:19,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:20,041 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 03:58:20,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 129 [2022-11-03 03:58:20,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:20,168 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:20,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:20,203 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:58:20,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:58:20,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:20,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:20,303 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 03:58:20,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 119 [2022-11-03 03:58:20,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:20,386 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:20,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:20,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:20,418 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:20,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:20,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:20,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:20,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:20,474 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:58:20,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:58:20,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:20,535 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:20,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:20,556 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:58:21,118 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3249#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:58:21,118 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:58:21,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:58:21,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-03 03:58:21,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884931267] [2022-11-03 03:58:21,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:58:21,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-03 03:58:21,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:21,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-03 03:58:21,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 03:58:21,123 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:21,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:21,302 INFO L93 Difference]: Finished difference Result 192 states and 230 transitions. [2022-11-03 03:58:21,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-03 03:58:21,303 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 03:58:21,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:21,304 INFO L225 Difference]: With dead ends: 192 [2022-11-03 03:58:21,304 INFO L226 Difference]: Without dead ends: 121 [2022-11-03 03:58:21,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 03:58:21,306 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:21,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:58:21,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-03 03:58:21,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-03 03:58:21,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0666666666666667) internal successors, (128), 120 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2022-11-03 03:58:21,318 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 94 [2022-11-03 03:58:21,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:21,319 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2022-11-03 03:58:21,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:21,319 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2022-11-03 03:58:21,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-03 03:58:21,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:21,321 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:58:21,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:21,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 03:58:21,538 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:21,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:21,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1978329557, now seen corresponding path program 7 times [2022-11-03 03:58:21,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:21,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896620333] [2022-11-03 03:58:21,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:21,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-11-03 03:58:25,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:25,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896620333] [2022-11-03 03:58:25,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896620333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:25,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696181341] [2022-11-03 03:58:25,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:58:25,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:25,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:25,366 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:25,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:58:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:25,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 1406 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 03:58:25,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-11-03 03:58:26,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-11-03 03:58:29,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696181341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:29,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1638801435] [2022-11-03 03:58:29,256 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-03 03:58:29,256 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:58:29,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:58:29,257 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:58:29,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:58:29,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:29,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:29,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:29,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:29,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:29,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:29,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:29,595 INFO L356 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2022-11-03 03:58:29,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2022-11-03 03:58:29,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:29,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:29,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:29,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:29,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:29,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:29,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:30,113 INFO L356 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-11-03 03:58:30,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-11-03 03:58:30,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:30,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:30,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-03 03:58:30,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:30,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:30,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:30,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:30,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:30,649 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-03 03:58:30,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 684 treesize of output 674 [2022-11-03 03:58:31,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:31,955 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 03:58:31,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 03:58:31,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:31,994 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:31,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:32,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:32,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:32,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:32,050 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:58:32,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:58:32,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:32,128 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:32,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:32,192 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:58:32,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:58:32,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:32,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:32,294 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 03:58:32,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 119 [2022-11-03 03:58:32,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:32,391 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:32,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:32,425 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:58:32,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:58:32,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:32,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:32,518 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 03:58:32,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 119 [2022-11-03 03:58:32,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:32,606 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:32,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:32,635 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:58:32,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:58:32,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:32,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:32,732 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 03:58:32,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 119 [2022-11-03 03:58:32,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:32,837 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:32,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:32,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:32,874 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:32,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:32,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:32,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:32,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:32,939 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:58:32,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:58:32,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:33,000 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:33,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:33,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:33,037 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:33,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:33,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:33,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:33,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:33,104 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:58:33,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:58:33,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:33,162 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:58:33,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:58:33,184 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:58:33,903 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4675#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:58:33,903 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:58:33,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:58:33,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-03 03:58:33,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109066353] [2022-11-03 03:58:33,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:58:33,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-03 03:58:33,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:33,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-03 03:58:33,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-03 03:58:33,911 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand has 101 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 100 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:34,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:34,222 INFO L93 Difference]: Finished difference Result 242 states and 305 transitions. [2022-11-03 03:58:34,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-03 03:58:34,223 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 100 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2022-11-03 03:58:34,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:34,224 INFO L225 Difference]: With dead ends: 242 [2022-11-03 03:58:34,224 INFO L226 Difference]: Without dead ends: 171 [2022-11-03 03:58:34,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-03 03:58:34,230 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:34,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:58:34,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-03 03:58:34,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-11-03 03:58:34,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.0470588235294118) internal successors, (178), 170 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:34,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 178 transitions. [2022-11-03 03:58:34,245 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 178 transitions. Word has length 119 [2022-11-03 03:58:34,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:34,246 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 178 transitions. [2022-11-03 03:58:34,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 100 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:34,246 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 178 transitions. [2022-11-03 03:58:34,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-11-03 03:58:34,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:34,250 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:58:34,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:34,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 03:58:34,465 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:34,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:34,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1103223083, now seen corresponding path program 8 times [2022-11-03 03:58:34,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:34,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181777478] [2022-11-03 03:58:34,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:34,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5181 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-11-03 03:58:45,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:45,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181777478] [2022-11-03 03:58:45,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181777478] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:45,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107955938] [2022-11-03 03:58:45,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:58:45,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:45,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:45,064 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:45,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 03:58:57,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-03 03:58:57,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:58:57,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:58:57,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5181 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5126 trivial. 0 not checked. [2022-11-03 03:58:58,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5181 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5126 trivial. 0 not checked. [2022-11-03 03:58:59,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107955938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:59,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1094102874] [2022-11-03 03:58:59,004 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-03 03:58:59,004 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:58:59,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:58:59,005 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:58:59,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:58:59,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:59,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:59,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:59,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:59,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:59,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:59,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:59,558 INFO L356 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-11-03 03:58:59,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-11-03 03:58:59,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:59,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:59,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:59,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:59,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:59,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:59,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:59,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 43 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 52 [2022-11-03 03:58:59,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:59,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:59,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-03 03:59:00,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:00,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:00,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:00,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:00,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:00,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:00,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:00,109 INFO L356 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-03 03:59:00,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 704 treesize of output 672 [2022-11-03 03:59:00,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:00,361 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 03:59:00,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 03:59:00,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:00,423 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:59:00,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:59:00,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:00,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:00,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:00,491 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:59:00,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:59:00,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:00,602 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:59:00,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:59:00,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:00,651 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:59:00,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:59:00,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:00,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:00,708 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:59:00,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 110 treesize of output 115 [2022-11-03 03:59:00,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:00,774 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:59:00,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:59:00,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:00,825 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:59:00,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:59:00,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:00,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:00,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:00,884 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:59:00,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:59:00,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:00,943 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:59:00,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:59:00,978 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:59:00,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:59:01,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:01,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:01,086 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 03:59:01,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 119 [2022-11-03 03:59:01,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:01,187 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:59:01,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:59:01,218 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:59:01,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:59:01,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:01,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:01,328 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-03 03:59:01,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 129 [2022-11-03 03:59:01,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:01,430 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:59:01,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:59:01,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:01,468 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:59:01,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:59:01,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:01,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:01,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:01,534 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:59:01,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:59:01,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:01,596 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:59:01,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:59:01,618 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:59:02,766 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6623#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:59:02,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:59:02,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:59:02,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-11-03 03:59:02,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226158466] [2022-11-03 03:59:02,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:59:02,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-03 03:59:02,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:02,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-03 03:59:02,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-03 03:59:02,774 INFO L87 Difference]: Start difference. First operand 171 states and 178 transitions. Second operand has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:03,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:03,495 INFO L93 Difference]: Finished difference Result 315 states and 401 transitions. [2022-11-03 03:59:03,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-03 03:59:03,496 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2022-11-03 03:59:03,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:03,498 INFO L225 Difference]: With dead ends: 315 [2022-11-03 03:59:03,498 INFO L226 Difference]: Without dead ends: 244 [2022-11-03 03:59:03,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-03 03:59:03,504 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:03,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:59:03,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-03 03:59:03,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2022-11-03 03:59:03,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.0329218106995885) internal successors, (251), 243 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:03,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 251 transitions. [2022-11-03 03:59:03,522 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 251 transitions. Word has length 169 [2022-11-03 03:59:03,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:03,523 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 251 transitions. [2022-11-03 03:59:03,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:03,523 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 251 transitions. [2022-11-03 03:59:03,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-03 03:59:03,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:03,528 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:03,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:03,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:03,729 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:03,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:03,729 INFO L85 PathProgramCache]: Analyzing trace with hash -673224829, now seen corresponding path program 9 times [2022-11-03 03:59:03,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:03,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489137915] [2022-11-03 03:59:03,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:03,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6468 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2022-11-03 03:59:14,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:14,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489137915] [2022-11-03 03:59:14,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489137915] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:14,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253721986] [2022-11-03 03:59:14,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:59:14,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:14,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:14,415 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:14,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 03:59:15,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:59:15,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:59:15,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 2777 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-03 03:59:15,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6468 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2022-11-03 03:59:15,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6468 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2022-11-03 03:59:29,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253721986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:29,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1781593384] [2022-11-03 03:59:29,191 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-03 03:59:29,192 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:59:29,192 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:59:29,192 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:59:29,192 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:59:29,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:29,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:29,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:29,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:29,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:29,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:29,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:29,528 INFO L356 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2022-11-03 03:59:29,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2022-11-03 03:59:29,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:29,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:29,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:29,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:29,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:29,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:29,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:29,989 INFO L356 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-11-03 03:59:29,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-11-03 03:59:30,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:30,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:30,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-03 03:59:30,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:30,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:30,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:30,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:30,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:30,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:30,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:30,484 INFO L356 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-03 03:59:30,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 704 treesize of output 672 [2022-11-03 03:59:30,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:30,713 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 03:59:30,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 03:59:30,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:30,764 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:59:30,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:59:30,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:30,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:30,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:30,840 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:59:30,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:59:30,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:30,926 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:59:30,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:59:30,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:30,983 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:59:30,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:59:31,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:31,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:31,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:31,048 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:59:31,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:59:31,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:31,132 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:59:31,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:59:31,187 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:59:31,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:59:31,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:31,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:31,302 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 03:59:31,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 119 [2022-11-03 03:59:31,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:31,406 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:59:31,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:59:31,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:31,438 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:59:31,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:59:31,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:31,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:31,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:31,499 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:59:31,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:59:31,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:31,576 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:59:31,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:59:31,628 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:59:31,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 03:59:31,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:31,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:31,725 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 03:59:31,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 119 [2022-11-03 03:59:31,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:31,823 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:59:31,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:59:31,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:31,856 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:59:31,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:59:31,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:59:31,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:31,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:31,916 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 03:59:31,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 03:59:31,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:59:31,973 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:59:31,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 03:59:31,992 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:59:33,126 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9381#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:59:33,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:59:33,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:59:33,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-03 03:59:33,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708252752] [2022-11-03 03:59:33,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:59:33,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-03 03:59:33,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:33,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-03 03:59:33,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-03 03:59:33,139 INFO L87 Difference]: Start difference. First operand 244 states and 251 transitions. Second operand has 203 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 202 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:33,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:33,932 INFO L93 Difference]: Finished difference Result 488 states and 602 transitions. [2022-11-03 03:59:33,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-03 03:59:33,934 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 202 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2022-11-03 03:59:33,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:33,935 INFO L225 Difference]: With dead ends: 488 [2022-11-03 03:59:33,936 INFO L226 Difference]: Without dead ends: 345 [2022-11-03 03:59:33,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 619 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-03 03:59:33,941 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:33,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:59:33,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-11-03 03:59:33,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2022-11-03 03:59:33,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.0232558139534884) internal successors, (352), 344 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:33,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 352 transitions. [2022-11-03 03:59:33,961 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 352 transitions. Word has length 242 [2022-11-03 03:59:33,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:33,962 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 352 transitions. [2022-11-03 03:59:33,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 202 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:33,963 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 352 transitions. [2022-11-03 03:59:33,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-11-03 03:59:33,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:33,971 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:34,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:34,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:34,185 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:34,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:34,186 INFO L85 PathProgramCache]: Analyzing trace with hash -161094485, now seen corresponding path program 10 times [2022-11-03 03:59:34,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:34,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454935299] [2022-11-03 03:59:34,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:34,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 21618 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2022-11-03 04:00:11,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:11,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454935299] [2022-11-03 04:00:11,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454935299] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:00:11,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348498561] [2022-11-03 04:00:11,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 04:00:11,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:11,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:11,046 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:00:11,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 04:00:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:12,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 4494 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-03 04:00:12,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 21618 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2022-11-03 04:00:12,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:01,195 INFO L134 CoverageAnalysis]: Checked inductivity of 21618 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2022-11-03 04:01:01,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348498561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:01,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1699990907] [2022-11-03 04:01:01,197 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-03 04:01:01,197 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:01:01,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:01:01,198 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:01:01,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:01:01,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:01,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:01,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:01,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:01,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:01,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:01,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:01,504 INFO L356 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2022-11-03 04:01:01,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2022-11-03 04:01:01,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:01,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:01,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:01,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:01,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:01,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:01,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:01,911 INFO L356 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-11-03 04:01:01,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-11-03 04:01:02,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:02,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:02,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-03 04:01:02,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:02,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:02,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:02,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:02,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:02,333 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-03 04:01:02,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 684 treesize of output 674 [2022-11-03 04:01:03,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:03,361 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 04:01:03,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 04:01:03,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:03,394 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 04:01:03,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 04:01:03,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:03,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:03,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:03,449 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 04:01:03,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 04:01:03,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:03,514 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 04:01:03,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 04:01:03,562 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 04:01:03,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 04:01:03,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:03,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:03,642 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 04:01:03,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 119 [2022-11-03 04:01:03,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:03,711 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 04:01:03,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 04:01:03,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:03,742 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 04:01:03,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 04:01:03,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:03,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:03,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:03,796 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 04:01:03,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 04:01:03,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:03,843 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 04:01:03,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 04:01:03,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:03,881 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 04:01:03,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 04:01:03,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:03,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:03,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:03,940 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-03 04:01:03,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 115 [2022-11-03 04:01:03,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:04,005 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 04:01:04,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 04:01:04,056 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 04:01:04,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 04:01:04,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:04,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:04,164 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 04:01:04,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 119 [2022-11-03 04:01:04,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:04,229 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 04:01:04,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 04:01:04,260 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 04:01:04,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 04:01:04,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:04,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:04,356 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-03 04:01:04,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 100 treesize of output 119 [2022-11-03 04:01:04,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:04,452 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 04:01:04,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-11-03 04:01:04,474 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:01:05,937 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13495#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 04:01:05,937 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:01:05,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:01:05,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-03 04:01:05,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729352768] [2022-11-03 04:01:05,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:01:05,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-03 04:01:05,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:05,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-03 04:01:05,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-03 04:01:05,956 INFO L87 Difference]: Start difference. First operand 345 states and 352 transitions. Second operand has 405 states, 405 states have (on average 1.039506172839506) internal successors, (421), 404 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:09,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:09,620 INFO L93 Difference]: Finished difference Result 690 states and 905 transitions. [2022-11-03 04:01:09,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-03 04:01:09,621 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.039506172839506) internal successors, (421), 404 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 343 [2022-11-03 04:01:09,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:09,623 INFO L225 Difference]: With dead ends: 690 [2022-11-03 04:01:09,623 INFO L226 Difference]: Without dead ends: 547 [2022-11-03 04:01:09,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1229 GetRequests, 821 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 67.3s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-03 04:01:09,634 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:09,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 04:01:09,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-11-03 04:01:09,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 547. [2022-11-03 04:01:09,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.0146520146520146) internal successors, (554), 546 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:09,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 554 transitions. [2022-11-03 04:01:09,661 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 554 transitions. Word has length 343 [2022-11-03 04:01:09,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:09,662 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 554 transitions. [2022-11-03 04:01:09,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.039506172839506) internal successors, (421), 404 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:09,663 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 554 transitions. [2022-11-03 04:01:09,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2022-11-03 04:01:09,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:09,675 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:09,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:09,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 04:01:09,894 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:09,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:09,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1132047275, now seen corresponding path program 11 times [2022-11-03 04:01:09,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:09,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452897333] [2022-11-03 04:01:09,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:09,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 82521 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2022-11-03 04:03:24,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:03:24,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452897333] [2022-11-03 04:03:24,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452897333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:03:24,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174217710] [2022-11-03 04:03:24,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:03:24,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:24,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:24,765 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:24,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ac86087-d4c7-4f83-88af-1c2d22fa564f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process