./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_tiling_tcpy.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_tiling_tcpy.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0 --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 5446997f7b2d7b76d63a39784df785fb06bbab562e365ba547eeee8a855e283e --- 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-e04fb08 [2022-11-16 19:30:41,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:30:41,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:30:41,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:30:41,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:30:41,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:30:41,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:30:41,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:30:41,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:30:41,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:30:41,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:30:41,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:30:41,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:30:41,252 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:30:41,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:30:41,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:30:41,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:30:41,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:30:41,264 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:30:41,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:30:41,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:30:41,277 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:30:41,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:30:41,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:30:41,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:30:41,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:30:41,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:30:41,294 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:30:41,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:30:41,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:30:41,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:30:41,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:30:41,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:30:41,302 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:30:41,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:30:41,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:30:41,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:30:41,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:30:41,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:30:41,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:30:41,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:30:41,310 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 19:30:41,356 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:30:41,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:30:41,357 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:30:41,357 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:30:41,358 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:30:41,359 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:30:41,359 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:30:41,359 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:30:41,359 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:30:41,360 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:30:41,361 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:30:41,361 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:30:41,362 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:30:41,362 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:30:41,362 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:30:41,362 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:30:41,363 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:30:41,363 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:30:41,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:30:41,364 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:30:41,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:30:41,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:30:41,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:30:41,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:30:41,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:30:41,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:30:41,367 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:30:41,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:30:41,368 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:30:41,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:30:41,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:30:41,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:30:41,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:30:41,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:30:41,370 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:30:41,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:30:41,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:30:41,371 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:30:41,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:30:41,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:30:41,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:30:41,372 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_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5446997f7b2d7b76d63a39784df785fb06bbab562e365ba547eeee8a855e283e [2022-11-16 19:30:41,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:30:41,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:30:41,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:30:41,733 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:30:41,733 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:30:41,735 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-cav19/array_tiling_tcpy.c [2022-11-16 19:30:41,808 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0/data/f68d724ab/fbae068426f84463bc36ce68d025537f/FLAG1aff75f91 [2022-11-16 19:30:42,396 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:30:42,397 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/sv-benchmarks/c/array-cav19/array_tiling_tcpy.c [2022-11-16 19:30:42,408 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0/data/f68d724ab/fbae068426f84463bc36ce68d025537f/FLAG1aff75f91 [2022-11-16 19:30:42,742 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0/data/f68d724ab/fbae068426f84463bc36ce68d025537f [2022-11-16 19:30:42,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:30:42,752 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:30:42,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:30:42,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:30:42,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:30:42,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:30:42" (1/1) ... [2022-11-16 19:30:42,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45e813b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:42, skipping insertion in model container [2022-11-16 19:30:42,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:30:42" (1/1) ... [2022-11-16 19:30:42,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:30:42,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:30:43,035 WARN L229 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_bef4dc17-658c-48e9-b6e6-5fa885b64e22/sv-benchmarks/c/array-cav19/array_tiling_tcpy.c[408,421] [2022-11-16 19:30:43,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:30:43,061 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:30:43,076 WARN L229 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_bef4dc17-658c-48e9-b6e6-5fa885b64e22/sv-benchmarks/c/array-cav19/array_tiling_tcpy.c[408,421] [2022-11-16 19:30:43,084 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:30:43,099 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:30:43,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:43 WrapperNode [2022-11-16 19:30:43,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:30:43,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:30:43,102 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:30:43,102 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:30:43,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:43" (1/1) ... [2022-11-16 19:30:43,118 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:43" (1/1) ... [2022-11-16 19:30:43,140 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 60 [2022-11-16 19:30:43,141 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:30:43,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:30:43,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:30:43,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:30:43,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:43" (1/1) ... [2022-11-16 19:30:43,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:43" (1/1) ... [2022-11-16 19:30:43,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:43" (1/1) ... [2022-11-16 19:30:43,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:43" (1/1) ... [2022-11-16 19:30:43,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:43" (1/1) ... [2022-11-16 19:30:43,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:43" (1/1) ... [2022-11-16 19:30:43,166 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:43" (1/1) ... [2022-11-16 19:30:43,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:43" (1/1) ... [2022-11-16 19:30:43,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:30:43,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:30:43,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:30:43,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:30:43,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:43" (1/1) ... [2022-11-16 19:30:43,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:30:43,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:30:43,206 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:30:43,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:30:43,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:30:43,272 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 19:30:43,272 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 19:30:43,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:30:43,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 19:30:43,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 19:30:43,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:30:43,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:30:43,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 19:30:43,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 19:30:43,354 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:30:43,356 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:30:43,533 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:30:43,608 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:30:43,608 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 19:30:43,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:30:43 BoogieIcfgContainer [2022-11-16 19:30:43,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:30:43,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:30:43,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:30:43,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:30:43,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:30:42" (1/3) ... [2022-11-16 19:30:43,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2a63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:30:43, skipping insertion in model container [2022-11-16 19:30:43,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:30:43" (2/3) ... [2022-11-16 19:30:43,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2a63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:30:43, skipping insertion in model container [2022-11-16 19:30:43,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:30:43" (3/3) ... [2022-11-16 19:30:43,648 INFO L112 eAbstractionObserver]: Analyzing ICFG array_tiling_tcpy.c [2022-11-16 19:30:43,679 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:30:43,688 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 19:30:43,753 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:30:43,762 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;@282bc479, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:30:43,763 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 19:30:43,768 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 19:30:43,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:30:43,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:30:43,779 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:30:43,780 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:30:43,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:30:43,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1517292925, now seen corresponding path program 1 times [2022-11-16 19:30:43,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:30:43,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713097828] [2022-11-16 19:30:43,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:30:43,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:30:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:30:44,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:30:44,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:30:44,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713097828] [2022-11-16 19:30:44,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713097828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:30:44,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:30:44,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:30:44,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556325855] [2022-11-16 19:30:44,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:30:44,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:30:44,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:30:44,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:30:44,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:30:44,245 INFO L87 Difference]: Start difference. First operand has 13 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 19:30:44,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:30:44,355 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2022-11-16 19:30:44,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:30:44,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 12 [2022-11-16 19:30:44,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:30:44,367 INFO L225 Difference]: With dead ends: 27 [2022-11-16 19:30:44,375 INFO L226 Difference]: Without dead ends: 18 [2022-11-16 19:30:44,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:30:44,385 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:30:44,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 18 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:30:44,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-16 19:30:44,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2022-11-16 19:30:44,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 19:30:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-16 19:30:44,446 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 12 [2022-11-16 19:30:44,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:30:44,451 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-16 19:30:44,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 19:30:44,452 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-16 19:30:44,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 19:30:44,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:30:44,455 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:30:44,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:30:44,456 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:30:44,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:30:44,458 INFO L85 PathProgramCache]: Analyzing trace with hash -213805710, now seen corresponding path program 1 times [2022-11-16 19:30:44,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:30:44,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976841095] [2022-11-16 19:30:44,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:30:44,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:30:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:30:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:30:44,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:30:44,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976841095] [2022-11-16 19:30:44,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976841095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:30:44,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252366942] [2022-11-16 19:30:44,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:30:44,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:30:44,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:30:44,722 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:30:44,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:30:44,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:30:44,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 19:30:44,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:30:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:30:45,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:30:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:30:45,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252366942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:30:45,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1432260868] [2022-11-16 19:30:45,270 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-16 19:30:45,270 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:30:45,274 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:30:45,287 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:30:45,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:30:45,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:45,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:45,706 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 19:30:45,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-16 19:30:45,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:45,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:45,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-16 19:30:45,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:45,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:45,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:45,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:45,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:45,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 73 [2022-11-16 19:30:45,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:30:46,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:30:46,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:30:46,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:30:46,146 INFO L321 Elim1Store]: treesize reduction 140, result has 19.5 percent of original size [2022-11-16 19:30:46,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 360 treesize of output 376 [2022-11-16 19:30:46,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:46,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:30:46,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:30:46,309 INFO L321 Elim1Store]: treesize reduction 44, result has 38.0 percent of original size [2022-11-16 19:30:46,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2022-11-16 19:30:46,397 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2022-11-16 19:30:46,450 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:30:47,324 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '156#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~S~0#1| 2147483647) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#acopy~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#acopy~0#1.offset| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| (* 2 |ULTIMATE.start_main_~S~0#1|)) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#acopy~0#1.base|) (+ |ULTIMATE.start_main_~#acopy~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |#NULL.base| 0))' at error location [2022-11-16 19:30:47,325 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:30:47,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:30:47,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-11-16 19:30:47,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493702179] [2022-11-16 19:30:47,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:30:47,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 19:30:47,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:30:47,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 19:30:47,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-11-16 19:30:47,331 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 19:30:47,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:30:47,411 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-11-16 19:30:47,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:30:47,413 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2022-11-16 19:30:47,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:30:47,414 INFO L225 Difference]: With dead ends: 29 [2022-11-16 19:30:47,414 INFO L226 Difference]: Without dead ends: 24 [2022-11-16 19:30:47,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-11-16 19:30:47,417 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:30:47,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 17 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:30:47,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-16 19:30:47,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2022-11-16 19:30:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 19:30:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-16 19:30:47,430 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 13 [2022-11-16 19:30:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:30:47,431 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-16 19:30:47,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 19:30:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-16 19:30:47,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 19:30:47,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:30:47,434 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:30:47,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 19:30:47,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:30:47,641 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:30:47,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:30:47,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1956711453, now seen corresponding path program 2 times [2022-11-16 19:30:47,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:30:47,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325923803] [2022-11-16 19:30:47,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:30:47,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:30:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:30:48,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:30:48,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:30:48,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325923803] [2022-11-16 19:30:48,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325923803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:30:48,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132466812] [2022-11-16 19:30:48,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:30:48,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:30:48,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:30:48,385 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:30:48,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef4dc17-658c-48e9-b6e6-5fa885b64e22/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 19:30:48,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:30:48,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:30:48,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 19:30:48,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:30:48,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 19:30:48,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:48,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:48,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 27 [2022-11-16 19:30:48,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:48,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:48,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:30:48,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 44 [2022-11-16 19:30:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:30:48,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:30:48,837 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:30:48,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7668 treesize of output 7328 [2022-11-16 19:30:48,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2462 treesize of output 2246