./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW --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 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 --- 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-4e7fbc6 [2022-11-23 14:59:13,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:59:13,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:59:13,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:59:13,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:59:13,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:59:13,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:59:13,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:59:13,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:59:13,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:59:13,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:59:13,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:59:13,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:59:13,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:59:13,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:59:13,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:59:13,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:59:13,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:59:13,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:59:13,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:59:13,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:59:13,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:59:13,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:59:13,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:59:13,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:59:13,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:59:13,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:59:13,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:59:13,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:59:13,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:59:13,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:59:13,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:59:13,253 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:59:13,254 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:59:13,255 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:59:13,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:59:13,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:59:13,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:59:13,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:59:13,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:59:13,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:59:13,259 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:59:13,297 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:59:13,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:59:13,302 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:59:13,303 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:59:13,304 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:59:13,304 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:59:13,304 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:59:13,304 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:59:13,305 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:59:13,305 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:59:13,306 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:59:13,306 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:59:13,306 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:59:13,307 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:59:13,307 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:59:13,307 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:59:13,307 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:59:13,308 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:59:13,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:59:13,309 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:59:13,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:59:13,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:59:13,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:59:13,309 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:59:13,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:59:13,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:59:13,311 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:59:13,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:59:13,311 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:59:13,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:59:13,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:59:13,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:59:13,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:59:13,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:59:13,313 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:59:13,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:59:13,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:59:13,314 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:59:13,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:59:13,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:59:13,315 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:59:13,316 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_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 [2022-11-23 14:59:13,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:59:13,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:59:13,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:59:13,632 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:59:13,633 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:59:13,634 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2022-11-23 14:59:16,703 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:59:16,934 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:59:16,935 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2022-11-23 14:59:16,941 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/data/a2057ca39/51925de3c45249d98a87ed70d1c706d2/FLAG12770fbf8 [2022-11-23 14:59:16,962 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/data/a2057ca39/51925de3c45249d98a87ed70d1c706d2 [2022-11-23 14:59:16,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:59:16,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:59:16,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:59:16,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:59:16,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:59:16,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:59:16" (1/1) ... [2022-11-23 14:59:16,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@341a63fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:16, skipping insertion in model container [2022-11-23 14:59:16,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:59:16" (1/1) ... [2022-11-23 14:59:16,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:59:17,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:59:17,218 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2022-11-23 14:59:17,244 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:59:17,252 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:59:17,263 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2022-11-23 14:59:17,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:59:17,285 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:59:17,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:17 WrapperNode [2022-11-23 14:59:17,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:59:17,287 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:59:17,287 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:59:17,287 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:59:17,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:17" (1/1) ... [2022-11-23 14:59:17,300 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:17" (1/1) ... [2022-11-23 14:59:17,319 INFO L138 Inliner]: procedures = 15, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2022-11-23 14:59:17,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:59:17,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:59:17,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:59:17,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:59:17,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:17" (1/1) ... [2022-11-23 14:59:17,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:17" (1/1) ... [2022-11-23 14:59:17,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:17" (1/1) ... [2022-11-23 14:59:17,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:17" (1/1) ... [2022-11-23 14:59:17,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:17" (1/1) ... [2022-11-23 14:59:17,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:17" (1/1) ... [2022-11-23 14:59:17,363 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:17" (1/1) ... [2022-11-23 14:59:17,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:17" (1/1) ... [2022-11-23 14:59:17,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:59:17,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:59:17,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:59:17,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:59:17,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:17" (1/1) ... [2022-11-23 14:59:17,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:59:17,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:59:17,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:59:17,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:59:17,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:59:17,456 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 14:59:17,456 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 14:59:17,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:59:17,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:59:17,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:59:17,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:59:17,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:59:17,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:59:17,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:59:17,528 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:59:17,530 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:59:17,749 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:59:17,837 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:59:17,838 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 14:59:17,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:59:17 BoogieIcfgContainer [2022-11-23 14:59:17,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:59:17,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:59:17,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:59:17,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:59:17,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:59:16" (1/3) ... [2022-11-23 14:59:17,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d75bdc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:59:17, skipping insertion in model container [2022-11-23 14:59:17,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:59:17" (2/3) ... [2022-11-23 14:59:17,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d75bdc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:59:17, skipping insertion in model container [2022-11-23 14:59:17,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:59:17" (3/3) ... [2022-11-23 14:59:17,861 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr2.c [2022-11-23 14:59:17,882 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:59:17,882 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:59:17,935 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:59:17,943 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;@5ebe9b40, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:59:17,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:59:17,947 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:59:17,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 14:59:17,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:59:17,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 14:59:17,956 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:59:17,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:59:17,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1033138693, now seen corresponding path program 1 times [2022-11-23 14:59:17,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:59:17,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271121486] [2022-11-23 14:59:17,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:17,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:59:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:59:18,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:59:18,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271121486] [2022-11-23 14:59:18,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271121486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:59:18,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:59:18,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:59:18,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990761941] [2022-11-23 14:59:18,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:59:18,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:59:18,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:59:18,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:59:18,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:59:18,400 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:59:18,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:59:18,487 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2022-11-23 14:59:18,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:59:18,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-23 14:59:18,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:59:18,498 INFO L225 Difference]: With dead ends: 27 [2022-11-23 14:59:18,498 INFO L226 Difference]: Without dead ends: 19 [2022-11-23 14:59:18,502 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 [2022-11-23 14:59:18,507 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:59:18,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:59:18,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-23 14:59:18,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2022-11-23 14:59:18,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:59:18,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-11-23 14:59:18,554 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 6 [2022-11-23 14:59:18,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:59:18,555 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-11-23 14:59:18,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:59:18,556 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-11-23 14:59:18,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 14:59:18,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:59:18,558 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:59:18,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:59:18,559 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:59:18,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:59:18,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1201809854, now seen corresponding path program 1 times [2022-11-23 14:59:18,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:59:18,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553412960] [2022-11-23 14:59:18,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:18,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:59:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 14:59:18,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:59:18,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553412960] [2022-11-23 14:59:18,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553412960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:59:18,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:59:18,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:59:18,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048564077] [2022-11-23 14:59:18,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:59:18,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:59:18,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:59:18,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:59:18,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:59:18,781 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:59:18,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:59:18,890 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2022-11-23 14:59:18,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:59:18,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2022-11-23 14:59:18,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:59:18,892 INFO L225 Difference]: With dead ends: 25 [2022-11-23 14:59:18,893 INFO L226 Difference]: Without dead ends: 20 [2022-11-23 14:59:18,895 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 [2022-11-23 14:59:18,897 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:59:18,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 12 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:59:18,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-23 14:59:18,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2022-11-23 14:59:18,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:59:18,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-23 14:59:18,903 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 17 [2022-11-23 14:59:18,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:59:18,904 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-23 14:59:18,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:59:18,904 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-23 14:59:18,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 14:59:18,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:59:18,908 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:59:18,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:59:18,908 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:59:18,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:59:18,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1407331851, now seen corresponding path program 1 times [2022-11-23 14:59:18,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:59:18,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667843275] [2022-11-23 14:59:18,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:18,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:59:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 14:59:19,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:59:19,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667843275] [2022-11-23 14:59:19,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667843275] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:59:19,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167996776] [2022-11-23 14:59:19,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:19,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:59:19,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:59:19,155 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:59:19,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:59:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:19,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:59:19,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:59:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 14:59:19,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:59:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 14:59:19,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167996776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:59:19,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1441879791] [2022-11-23 14:59:19,462 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 14:59:19,462 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:59:19,465 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:59:19,471 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:59:19,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:59:19,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:19,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:19,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:19,745 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-23 14:59:19,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-23 14:59:19,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:19,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:19,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:19,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-23 14:59:20,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:20,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:20,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:20,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 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 [2022-11-23 14:59:24,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:24,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:24,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:24,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:24,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:24,243 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 14:59:24,243 INFO L350 Elim1Store]: Elim1 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 573 treesize of output 539 [2022-11-23 14:59:28,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:28,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:28,739 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 14:59:28,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-23 14:59:28,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:28,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:28,985 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 14:59:28,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-23 14:59:29,069 INFO L321 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-11-23 14:59:29,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 40 [2022-11-23 14:59:29,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:29,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:29,146 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-23 14:59:29,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-23 14:59:29,276 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2022-11-23 14:59:29,278 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:59:29,844 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '262#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:59:29,844 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:59:29,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:59:29,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-11-23 14:59:29,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538794834] [2022-11-23 14:59:29,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:59:29,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 14:59:29,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:59:29,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 14:59:29,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2022-11-23 14:59:29,847 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:59:30,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:59:30,031 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2022-11-23 14:59:30,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:59:30,032 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 18 [2022-11-23 14:59:30,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:59:30,036 INFO L225 Difference]: With dead ends: 52 [2022-11-23 14:59:30,036 INFO L226 Difference]: Without dead ends: 45 [2022-11-23 14:59:30,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2022-11-23 14:59:30,046 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:59:30,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 18 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:59:30,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-23 14:59:30,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2022-11-23 14:59:30,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-23 14:59:30,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 47 transitions. [2022-11-23 14:59:30,068 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 47 transitions. Word has length 18 [2022-11-23 14:59:30,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:59:30,069 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 47 transitions. [2022-11-23 14:59:30,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:59:30,069 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 47 transitions. [2022-11-23 14:59:30,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 14:59:30,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:59:30,072 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-23 14:59:30,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:59:30,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:59:30,279 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:59:30,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:59:30,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2143827323, now seen corresponding path program 2 times [2022-11-23 14:59:30,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:59:30,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041779873] [2022-11-23 14:59:30,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:30,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:59:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-23 14:59:30,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:59:30,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041779873] [2022-11-23 14:59:30,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041779873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:59:30,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978497957] [2022-11-23 14:59:30,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:59:30,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:59:30,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:59:30,541 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:59:30,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:59:30,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:59:30,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:59:30,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:59:30,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:59:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-11-23 14:59:30,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:59:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-11-23 14:59:31,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978497957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:59:31,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1908458644] [2022-11-23 14:59:31,003 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 14:59:31,003 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:59:31,003 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:59:31,004 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:59:31,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:59:31,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:31,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:31,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:31,115 INFO L321 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2022-11-23 14:59:31,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 72 [2022-11-23 14:59:31,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:31,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:31,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:31,263 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-23 14:59:31,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-23 14:59:31,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:31,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:31,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:31,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 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 [2022-11-23 14:59:34,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:34,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:34,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:34,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:34,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:34,199 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 14:59:34,200 INFO L350 Elim1Store]: Elim1 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 573 treesize of output 539 [2022-11-23 14:59:37,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:37,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:37,520 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 14:59:37,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-23 14:59:37,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:37,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:37,736 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 14:59:37,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-23 14:59:37,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:37,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:37,820 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-23 14:59:37,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-23 14:59:37,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:37,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:37,888 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-23 14:59:37,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-23 14:59:37,999 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2022-11-23 14:59:38,000 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:59:38,657 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '753#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:59:38,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:59:38,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:59:38,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 19 [2022-11-23 14:59:38,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107995678] [2022-11-23 14:59:38,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:59:38,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 14:59:38,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:59:38,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 14:59:38,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2022-11-23 14:59:38,660 INFO L87 Difference]: Start difference. First operand 34 states and 47 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-23 14:59:39,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:59:39,115 INFO L93 Difference]: Finished difference Result 121 states and 165 transitions. [2022-11-23 14:59:39,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 14:59:39,115 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 54 [2022-11-23 14:59:39,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:59:39,117 INFO L225 Difference]: With dead ends: 121 [2022-11-23 14:59:39,118 INFO L226 Difference]: Without dead ends: 111 [2022-11-23 14:59:39,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 14:59:39,119 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 203 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:59:39,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 42 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:59:39,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-23 14:59:39,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 70. [2022-11-23 14:59:39,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-23 14:59:39,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 101 transitions. [2022-11-23 14:59:39,136 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 101 transitions. Word has length 54 [2022-11-23 14:59:39,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:59:39,137 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 101 transitions. [2022-11-23 14:59:39,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-23 14:59:39,138 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 101 transitions. [2022-11-23 14:59:39,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-23 14:59:39,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:59:39,141 INFO L195 NwaCegarLoop]: trace histogram [30, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-11-23 14:59:39,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:59:39,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:59:39,348 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:59:39,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:59:39,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1580456123, now seen corresponding path program 3 times [2022-11-23 14:59:39,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:59:39,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474684323] [2022-11-23 14:59:39,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:39,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:59:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2022-11-23 14:59:39,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:59:39,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474684323] [2022-11-23 14:59:39,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474684323] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:59:39,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495169144] [2022-11-23 14:59:39,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:59:39,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:59:39,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:59:39,981 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:59:40,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:59:42,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:59:42,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:59:42,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 14:59:42,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:59:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2022-11-23 14:59:42,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:59:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2022-11-23 14:59:42,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495169144] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:59:42,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [971240504] [2022-11-23 14:59:42,877 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 14:59:42,877 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:59:42,877 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:59:42,877 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:59:42,878 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:59:42,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:42,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:42,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:43,009 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-23 14:59:43,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-23 14:59:43,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:43,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:43,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:43,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-23 14:59:43,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:43,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:43,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:43,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 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 [2022-11-23 14:59:45,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:45,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:45,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:45,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:45,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:45,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:45,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:45,728 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 14:59:45,729 INFO L350 Elim1Store]: Elim1 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 623 treesize of output 537 [2022-11-23 14:59:46,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:46,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:46,891 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 14:59:46,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-23 14:59:47,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:47,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:47,620 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 14:59:47,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-23 14:59:47,725 INFO L321 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-11-23 14:59:47,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 40 [2022-11-23 14:59:47,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:47,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:47,798 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-23 14:59:47,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-23 14:59:48,063 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2022-11-23 14:59:48,072 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:59:49,010 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1873#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:59:49,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:59:49,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:59:49,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2022-11-23 14:59:49,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54273466] [2022-11-23 14:59:49,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:59:49,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-23 14:59:49,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:59:49,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-23 14:59:49,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=1359, Unknown=0, NotChecked=0, Total=2070 [2022-11-23 14:59:49,015 INFO L87 Difference]: Start difference. First operand 70 states and 101 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) [2022-11-23 14:59:49,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:59:49,992 INFO L93 Difference]: Finished difference Result 259 states and 351 transitions. [2022-11-23 14:59:49,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 14:59:49,993 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) Word has length 126 [2022-11-23 14:59:49,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:59:49,996 INFO L225 Difference]: With dead ends: 259 [2022-11-23 14:59:49,996 INFO L226 Difference]: Without dead ends: 243 [2022-11-23 14:59:49,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 334 SyntacticMatches, 11 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1031, Invalid=2161, Unknown=0, NotChecked=0, Total=3192 [2022-11-23 14:59:49,998 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 490 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:59:49,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 84 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:59:49,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-23 14:59:50,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 142. [2022-11-23 14:59:50,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-11-23 14:59:50,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 209 transitions. [2022-11-23 14:59:50,031 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 209 transitions. Word has length 126 [2022-11-23 14:59:50,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:59:50,032 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 209 transitions. [2022-11-23 14:59:50,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) [2022-11-23 14:59:50,032 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 209 transitions. [2022-11-23 14:59:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-11-23 14:59:50,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:59:50,039 INFO L195 NwaCegarLoop]: trace histogram [66, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2022-11-23 14:59:50,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:59:50,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:59:50,243 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:59:50,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:59:50,244 INFO L85 PathProgramCache]: Analyzing trace with hash 81571643, now seen corresponding path program 4 times [2022-11-23 14:59:50,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:59:50,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615682941] [2022-11-23 14:59:50,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:50,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:59:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2022-11-23 14:59:52,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:59:52,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615682941] [2022-11-23 14:59:52,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615682941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:59:52,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522559268] [2022-11-23 14:59:52,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:59:52,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:59:52,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:59:52,083 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:59:52,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:59:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:52,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:59:52,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:59:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2022-11-23 14:59:53,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:59:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2022-11-23 14:59:54,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522559268] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:59:54,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1497362178] [2022-11-23 14:59:54,549 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 14:59:54,549 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:59:54,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:59:54,550 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:59:54,550 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:59:54,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:54,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:54,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:54,658 INFO L321 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2022-11-23 14:59:54,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 72 [2022-11-23 14:59:54,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:54,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:54,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:54,784 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-23 14:59:54,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-23 14:59:55,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:55,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:55,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:55,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 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 [2022-11-23 14:59:57,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:57,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:59:57,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:57,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:57,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:59:57,233 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 14:59:57,234 INFO L350 Elim1Store]: Elim1 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 573 treesize of output 539 [2022-11-23 15:00:01,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:01,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:00:01,139 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:00:01,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-23 15:00:01,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:00:01,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:00:01,850 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:00:01,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-23 15:00:01,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:00:01,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:00:01,926 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-23 15:00:01,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-23 15:00:01,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:00:01,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:00:01,994 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-23 15:00:01,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-23 15:00:02,181 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2022-11-23 15:00:02,193 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:00:03,765 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4253#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 15:00:03,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:00:03,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:00:03,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2022-11-23 15:00:03,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557307245] [2022-11-23 15:00:03,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:00:03,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-23 15:00:03,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:00:03,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-23 15:00:03,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2535, Invalid=4107, Unknown=0, NotChecked=0, Total=6642 [2022-11-23 15:00:03,772 INFO L87 Difference]: Start difference. First operand 142 states and 209 transitions. Second operand has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) [2022-11-23 15:00:06,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:00:06,303 INFO L93 Difference]: Finished difference Result 535 states and 723 transitions. [2022-11-23 15:00:06,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-23 15:00:06,304 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) Word has length 270 [2022-11-23 15:00:06,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:00:06,309 INFO L225 Difference]: With dead ends: 535 [2022-11-23 15:00:06,310 INFO L226 Difference]: Without dead ends: 507 [2022-11-23 15:00:06,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 730 SyntacticMatches, 23 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7352 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3755, Invalid=7165, Unknown=0, NotChecked=0, Total=10920 [2022-11-23 15:00:06,313 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1248 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 740 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 740 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:00:06,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1251 Valid, 174 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [740 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 15:00:06,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-11-23 15:00:06,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 286. [2022-11-23 15:00:06,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 138 states have call successors, (138), 1 states have call predecessors, (138), 1 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2022-11-23 15:00:06,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 425 transitions. [2022-11-23 15:00:06,360 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 425 transitions. Word has length 270 [2022-11-23 15:00:06,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:00:06,361 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 425 transitions. [2022-11-23 15:00:06,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) [2022-11-23 15:00:06,362 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 425 transitions. [2022-11-23 15:00:06,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2022-11-23 15:00:06,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:00:06,376 INFO L195 NwaCegarLoop]: trace histogram [138, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2022-11-23 15:00:06,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:00:06,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:00:06,583 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:00:06,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:00:06,583 INFO L85 PathProgramCache]: Analyzing trace with hash -117138373, now seen corresponding path program 5 times [2022-11-23 15:00:06,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:00:06,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676939641] [2022-11-23 15:00:06,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:00:06,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:00:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:00:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 19987 trivial. 0 not checked. [2022-11-23 15:00:12,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:00:12,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676939641] [2022-11-23 15:00:12,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676939641] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:00:12,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040686897] [2022-11-23 15:00:12,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:00:12,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:00:12,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:00:12,447 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:00:12,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:02:03,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-23 15:02:03,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:02:03,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-23 15:02:03,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:02:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 226 proven. 1081 refuted. 0 times theorem prover too weak. 23901 trivial. 0 not checked. [2022-11-23 15:02:06,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:02:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 0 proven. 1352 refuted. 0 times theorem prover too weak. 23856 trivial. 0 not checked. [2022-11-23 15:02:10,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040686897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:02:10,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [433732356] [2022-11-23 15:02:10,252 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 15:02:10,252 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:02:10,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:02:10,253 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:02:10,253 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:02:10,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:10,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:10,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:10,367 INFO L321 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2022-11-23 15:02:10,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 72 [2022-11-23 15:02:10,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:10,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:10,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:10,499 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-23 15:02:10,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-23 15:02:10,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:10,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:10,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:10,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 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 [2022-11-23 15:02:12,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:12,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:12,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:02:12,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:02:12,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:02:13,011 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 15:02:13,012 INFO L350 Elim1Store]: Elim1 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 573 treesize of output 539 [2022-11-23 15:02:15,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:15,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:02:15,592 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:02:15,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-23 15:02:15,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:02:15,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:02:15,794 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:02:15,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-23 15:02:15,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:02:15,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:02:15,897 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-23 15:02:15,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-23 15:02:15,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:02:15,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:02:15,965 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-23 15:02:15,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-23 15:02:16,049 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2022-11-23 15:02:16,050 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:02:19,350 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9159#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 15:02:19,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:02:19,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:02:19,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 51, 53] total 150 [2022-11-23 15:02:19,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86170714] [2022-11-23 15:02:19,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:02:19,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-11-23 15:02:19,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:19,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-11-23 15:02:19,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10283, Invalid=15157, Unknown=0, NotChecked=0, Total=25440 [2022-11-23 15:02:19,362 INFO L87 Difference]: Start difference. First operand 286 states and 425 transitions. Second operand has 150 states, 150 states have (on average 1.3866666666666667) internal successors, (208), 150 states have internal predecessors, (208), 50 states have call successors, (150), 2 states have call predecessors, (150), 2 states have return successors, (150), 50 states have call predecessors, (150), 50 states have call successors, (150) [2022-11-23 15:02:29,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:29,876 INFO L93 Difference]: Finished difference Result 1087 states and 1467 transitions. [2022-11-23 15:02:29,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-23 15:02:29,878 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 1.3866666666666667) internal successors, (208), 150 states have internal predecessors, (208), 50 states have call successors, (150), 2 states have call predecessors, (150), 2 states have return successors, (150), 50 states have call predecessors, (150), 50 states have call successors, (150) Word has length 558 [2022-11-23 15:02:29,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:29,888 INFO L225 Difference]: With dead ends: 1087 [2022-11-23 15:02:29,889 INFO L226 Difference]: Without dead ends: 1035 [2022-11-23 15:02:29,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1767 GetRequests, 1516 SyntacticMatches, 47 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29021 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=15205, Invalid=27025, Unknown=0, NotChecked=0, Total=42230 [2022-11-23 15:02:29,897 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2660 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 2689 mSolverCounterSat, 3605 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2798 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 6294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3605 IncrementalHoareTripleChecker+Valid, 2689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:02:29,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2798 Valid, 375 Invalid, 6294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3605 Valid, 2689 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-23 15:02:29,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-11-23 15:02:29,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 574. [2022-11-23 15:02:29,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 290 states have (on average 1.0103448275862068) internal successors, (293), 290 states have internal predecessors, (293), 282 states have call successors, (282), 1 states have call predecessors, (282), 1 states have return successors, (282), 282 states have call predecessors, (282), 282 states have call successors, (282) [2022-11-23 15:02:29,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 857 transitions. [2022-11-23 15:02:29,978 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 857 transitions. Word has length 558 [2022-11-23 15:02:29,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:29,980 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 857 transitions. [2022-11-23 15:02:29,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 1.3866666666666667) internal successors, (208), 150 states have internal predecessors, (208), 50 states have call successors, (150), 2 states have call predecessors, (150), 2 states have return successors, (150), 50 states have call predecessors, (150), 50 states have call successors, (150) [2022-11-23 15:02:29,981 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 857 transitions. [2022-11-23 15:02:30,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1135 [2022-11-23 15:02:30,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:30,036 INFO L195 NwaCegarLoop]: trace histogram [282, 94, 94, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1] [2022-11-23 15:02:30,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-23 15:02:30,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:02:30,260 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:02:30,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:30,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1361933883, now seen corresponding path program 6 times [2022-11-23 15:02:30,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:30,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725979443] [2022-11-23 15:02:30,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:30,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 105656 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 83707 trivial. 0 not checked. [2022-11-23 15:02:48,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:48,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725979443] [2022-11-23 15:02:48,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725979443] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:02:48,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172935782] [2022-11-23 15:02:48,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:02:48,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:02:48,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:02:48,079 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:02:48,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db532e19-39c9-4f2c-9c4b-94a785be8aa3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process