./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test24-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test24-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7 --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 ba9918f9236391a08a9d6d8a63aa823d4042d99b397d7843518d83dccab2fbf8 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:40:38,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:40:38,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:40:38,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:40:38,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:40:38,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:40:38,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:40:38,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:40:38,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:40:38,389 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:40:38,390 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:40:38,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:40:38,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:40:38,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:40:38,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:40:38,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:40:38,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:40:38,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:40:38,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:40:38,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:40:38,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:40:38,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:40:38,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:40:38,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:40:38,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:40:38,430 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:40:38,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:40:38,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:40:38,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:40:38,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:40:38,435 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:40:38,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:40:38,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:40:38,437 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:40:38,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:40:38,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:40:38,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:40:38,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:40:38,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:40:38,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:40:38,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:40:38,444 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:40:38,469 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:40:38,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:40:38,470 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:40:38,470 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:40:38,471 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:40:38,472 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:40:38,472 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:40:38,472 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:40:38,473 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:40:38,473 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:40:38,474 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:40:38,474 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:40:38,475 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:40:38,475 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:40:38,475 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:40:38,475 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:40:38,476 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:40:38,476 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:40:38,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:40:38,477 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:40:38,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:40:38,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:40:38,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:40:38,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:40:38,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:40:38,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:40:38,478 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:40:38,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:40:38,479 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:40:38,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:40:38,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:40:38,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:40:38,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:40:38,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:40:38,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:40:38,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:40:38,481 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:40:38,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:40:38,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:40:38,482 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:40:38,482 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:40:38,482 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba9918f9236391a08a9d6d8a63aa823d4042d99b397d7843518d83dccab2fbf8 [2021-11-25 18:40:38,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:40:38,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:40:38,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:40:38,760 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:40:38,761 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:40:38,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-regression/test24-2.c [2021-11-25 18:40:38,840 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/data/2684a613c/b19d4dc8660442578e2965a36e1a4a4e/FLAGcebce9ad4 [2021-11-25 18:40:39,242 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:40:39,242 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/sv-benchmarks/c/ldv-regression/test24-2.c [2021-11-25 18:40:39,248 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/data/2684a613c/b19d4dc8660442578e2965a36e1a4a4e/FLAGcebce9ad4 [2021-11-25 18:40:39,644 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/data/2684a613c/b19d4dc8660442578e2965a36e1a4a4e [2021-11-25 18:40:39,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:40:39,648 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:40:39,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:40:39,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:40:39,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:40:39,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:40:39" (1/1) ... [2021-11-25 18:40:39,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@795f51c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:39, skipping insertion in model container [2021-11-25 18:40:39,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:40:39" (1/1) ... [2021-11-25 18:40:39,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:40:39,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:40:39,888 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/sv-benchmarks/c/ldv-regression/test24-2.c[807,820] [2021-11-25 18:40:39,891 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:40:39,898 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:40:39,916 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/sv-benchmarks/c/ldv-regression/test24-2.c[807,820] [2021-11-25 18:40:39,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:40:39,930 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:40:39,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:39 WrapperNode [2021-11-25 18:40:39,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:40:39,932 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:40:39,933 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:40:39,933 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:40:39,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:39" (1/1) ... [2021-11-25 18:40:39,951 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:39" (1/1) ... [2021-11-25 18:40:39,978 INFO L137 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 74 [2021-11-25 18:40:39,980 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:40:39,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:40:39,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:40:39,981 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:40:39,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:39" (1/1) ... [2021-11-25 18:40:39,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:39" (1/1) ... [2021-11-25 18:40:40,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:39" (1/1) ... [2021-11-25 18:40:40,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:39" (1/1) ... [2021-11-25 18:40:40,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:39" (1/1) ... [2021-11-25 18:40:40,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:39" (1/1) ... [2021-11-25 18:40:40,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:39" (1/1) ... [2021-11-25 18:40:40,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:40:40,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:40:40,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:40:40,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:40:40,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:39" (1/1) ... [2021-11-25 18:40:40,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:40:40,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:40,074 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:40:40,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:40:40,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:40:40,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:40:40,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:40:40,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:40:40,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:40:40,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:40:40,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:40:40,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:40:40,201 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:40:40,202 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:40:40,323 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:40:40,345 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:40:40,345 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 18:40:40,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:40:40 BoogieIcfgContainer [2021-11-25 18:40:40,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:40:40,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:40:40,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:40:40,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:40:40,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:40:39" (1/3) ... [2021-11-25 18:40:40,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46300332 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:40:40, skipping insertion in model container [2021-11-25 18:40:40,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:40:39" (2/3) ... [2021-11-25 18:40:40,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46300332 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:40:40, skipping insertion in model container [2021-11-25 18:40:40,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:40:40" (3/3) ... [2021-11-25 18:40:40,370 INFO L111 eAbstractionObserver]: Analyzing ICFG test24-2.c [2021-11-25 18:40:40,375 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:40:40,375 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:40:40,422 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:40:40,436 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:40:40,437 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:40:40,449 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 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) [2021-11-25 18:40:40,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 18:40:40,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:40,454 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:40,455 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:40:40,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:40,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2024849811, now seen corresponding path program 1 times [2021-11-25 18:40:40,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:40,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72392942] [2021-11-25 18:40:40,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:40,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:40:40,660 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:40,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72392942] [2021-11-25 18:40:40,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72392942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:40,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:40:40,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:40:40,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659127425] [2021-11-25 18:40:40,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:40,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:40:40,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:40,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:40:40,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:40:40,734 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:40,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:40,801 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2021-11-25 18:40:40,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:40:40,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 18:40:40,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:40,811 INFO L225 Difference]: With dead ends: 23 [2021-11-25 18:40:40,811 INFO L226 Difference]: Without dead ends: 10 [2021-11-25 18:40:40,813 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:40:40,828 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:40,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:40:40,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-25 18:40:40,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-25 18:40:40,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:40,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-25 18:40:40,895 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2021-11-25 18:40:40,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:40,895 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-25 18:40:40,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:40,896 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-25 18:40:40,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:40:40,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:40,896 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:40,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:40:40,897 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:40:40,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:40,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2016690528, now seen corresponding path program 1 times [2021-11-25 18:40:40,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:40,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073651267] [2021-11-25 18:40:40,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:40,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:40:40,972 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:40,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073651267] [2021-11-25 18:40:40,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073651267] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:40,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610229214] [2021-11-25 18:40:40,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:40,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:40,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:40,975 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:40,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:40:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:41,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:40:41,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:40:41,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:40:41,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:40:41,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610229214] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:40:41,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [27222074] [2021-11-25 18:40:41,249 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:40:41,249 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:40:41,253 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:40:41,258 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:40:41,259 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:40:41,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,417 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-11-25 18:40:41,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2021-11-25 18:40:41,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,495 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:40:41,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 18:40:41,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 37 [2021-11-25 18:40:41,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:41,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:41,769 INFO L354 Elim1Store]: treesize reduction 88, result has 29.0 percent of original size [2021-11-25 18:40:41,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 246 treesize of output 252 [2021-11-25 18:40:42,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:42,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 18:40:42,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-25 18:40:42,361 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:40:42,859 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '121#(and (<= 20 |ULTIMATE.start_main_~j~0#1|) (= (ite (= (select (select |#memory_int| |ULTIMATE.start_check_~ad1#1.base|) (+ |ULTIMATE.start_check_~ad1#1.offset| (* |ULTIMATE.start_check_~b#1| 8))) |ULTIMATE.start_check_~b#1|) 1 0) |ULTIMATE.start_check_#res#1|) (= |ULTIMATE.start_check_~ad1#1.offset| |ULTIMATE.start_check_#in~ad1#1.offset|) (<= 0 |ULTIMATE.start_main_~#ad1~0#1.base|) (= |ULTIMATE.start_check_#in~b#1| |ULTIMATE.start_check_~b#1|) (= |ULTIMATE.start_main_~ad2~0#1.offset| |ULTIMATE.start_main_~#ad1~0#1.offset|) (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_check_#in~b#1|) (= |ULTIMATE.start_main_~pa~0#1.base| |ULTIMATE.start_main_~#ad1~0#1.base|) (<= 0 (div (+ (* |ULTIMATE.start_main_~#ad1~0#1.offset| (- 1)) |ULTIMATE.start_main_~pa~0#1.offset|) 8)) (= (div (+ (* |ULTIMATE.start_main_~#ad1~0#1.offset| (- 1)) |ULTIMATE.start_main_~pa~0#1.offset|) 8) (select (select |#memory_int| |ULTIMATE.start_main_~#ad1~0#1.base|) (+ |ULTIMATE.start_main_~#ad1~0#1.offset| (* (div (+ (* |ULTIMATE.start_main_~#ad1~0#1.offset| (- 1)) |ULTIMATE.start_main_~pa~0#1.offset|) 8) 8)))) (= (mod (+ (* |ULTIMATE.start_main_~#ad1~0#1.offset| 7) |ULTIMATE.start_main_~pa~0#1.offset|) 8) 0) (= |ULTIMATE.start_main_~#ad1~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| (+ (select (select |#memory_int| |ULTIMATE.start_main_~ad2~0#1.base|) (+ |ULTIMATE.start_main_~ad2~0#1.offset| (* (div (+ (* |ULTIMATE.start_main_~#ad1~0#1.offset| (- 1)) |ULTIMATE.start_main_~pa~0#1.offset|) 8) 8))) 10)) (= |ULTIMATE.start_check_~ad1#1.base| |ULTIMATE.start_check_#in~ad1#1.base|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~ad2~0#1.base| |ULTIMATE.start_main_~#ad1~0#1.base|) (= 0 |ULTIMATE.start_check_#res#1|) (< (div (+ (* |ULTIMATE.start_main_~#ad1~0#1.offset| (- 1)) |ULTIMATE.start_main_~pa~0#1.offset|) 8) 10) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#ad1~0#1.base| |ULTIMATE.start_check_#in~ad1#1.base|) (= |ULTIMATE.start_check_#in~ad1#1.offset| |ULTIMATE.start_main_~#ad1~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:40:42,859 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:40:42,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:40:42,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-25 18:40:42,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267825764] [2021-11-25 18:40:42,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:40:42,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:40:42,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:42,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:40:42,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:40:42,863 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-11-25 18:40:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:42,883 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-11-25 18:40:42,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:40:42,884 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 18:40:42,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:42,884 INFO L225 Difference]: With dead ends: 20 [2021-11-25 18:40:42,885 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 18:40:42,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:40:42,887 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:42,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:40:42,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 18:40:42,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-25 18:40:42,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2021-11-25 18:40:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-25 18:40:42,892 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-11-25 18:40:42,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:42,892 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-25 18:40:42,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-11-25 18:40:42,893 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-25 18:40:42,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 18:40:42,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:42,894 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:42,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:40:43,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:43,112 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:40:43,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:43,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1032837971, now seen corresponding path program 2 times [2021-11-25 18:40:43,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:43,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654150862] [2021-11-25 18:40:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:43,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:40:43,262 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:43,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654150862] [2021-11-25 18:40:43,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654150862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:43,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484248431] [2021-11-25 18:40:43,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:40:43,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:43,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:43,269 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:43,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:40:43,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:40:43,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:40:43,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:40:43,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:40:43,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:40:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:40:43,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484248431] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:40:43,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [251698231] [2021-11-25 18:40:43,480 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:40:43,480 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:40:43,481 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:40:43,481 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:40:43,482 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:40:43,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:43,553 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:40:43,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 18:40:43,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:43,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 18:40:43,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:43,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:43,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 37 [2021-11-25 18:40:43,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:43,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:43,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:43,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:43,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:43,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:43,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:43,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:43,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:40:43,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:43,736 INFO L354 Elim1Store]: treesize reduction 88, result has 29.0 percent of original size [2021-11-25 18:40:43,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 246 treesize of output 252 [2021-11-25 18:40:44,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:44,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 18:40:44,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-25 18:40:44,183 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:40:44,630 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '258#(and (<= 20 |ULTIMATE.start_main_~j~0#1|) (= (ite (= (select (select |#memory_int| |ULTIMATE.start_check_~ad1#1.base|) (+ |ULTIMATE.start_check_~ad1#1.offset| (* |ULTIMATE.start_check_~b#1| 8))) |ULTIMATE.start_check_~b#1|) 1 0) |ULTIMATE.start_check_#res#1|) (= |ULTIMATE.start_check_~ad1#1.offset| |ULTIMATE.start_check_#in~ad1#1.offset|) (<= 0 |ULTIMATE.start_main_~#ad1~0#1.base|) (= |ULTIMATE.start_check_#in~b#1| |ULTIMATE.start_check_~b#1|) (= |ULTIMATE.start_main_~ad2~0#1.offset| |ULTIMATE.start_main_~#ad1~0#1.offset|) (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_check_#in~b#1|) (= |ULTIMATE.start_main_~pa~0#1.base| |ULTIMATE.start_main_~#ad1~0#1.base|) (<= 0 (div (+ (* |ULTIMATE.start_main_~#ad1~0#1.offset| (- 1)) |ULTIMATE.start_main_~pa~0#1.offset|) 8)) (= (div (+ (* |ULTIMATE.start_main_~#ad1~0#1.offset| (- 1)) |ULTIMATE.start_main_~pa~0#1.offset|) 8) (select (select |#memory_int| |ULTIMATE.start_main_~#ad1~0#1.base|) (+ |ULTIMATE.start_main_~#ad1~0#1.offset| (* (div (+ (* |ULTIMATE.start_main_~#ad1~0#1.offset| (- 1)) |ULTIMATE.start_main_~pa~0#1.offset|) 8) 8)))) (= (mod (+ (* |ULTIMATE.start_main_~#ad1~0#1.offset| 7) |ULTIMATE.start_main_~pa~0#1.offset|) 8) 0) (= |ULTIMATE.start_main_~#ad1~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| (+ (select (select |#memory_int| |ULTIMATE.start_main_~ad2~0#1.base|) (+ |ULTIMATE.start_main_~ad2~0#1.offset| (* (div (+ (* |ULTIMATE.start_main_~#ad1~0#1.offset| (- 1)) |ULTIMATE.start_main_~pa~0#1.offset|) 8) 8))) 10)) (= |ULTIMATE.start_check_~ad1#1.base| |ULTIMATE.start_check_#in~ad1#1.base|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~ad2~0#1.base| |ULTIMATE.start_main_~#ad1~0#1.base|) (= 0 |ULTIMATE.start_check_#res#1|) (< (div (+ (* |ULTIMATE.start_main_~#ad1~0#1.offset| (- 1)) |ULTIMATE.start_main_~pa~0#1.offset|) 8) 10) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#ad1~0#1.base| |ULTIMATE.start_check_#in~ad1#1.base|) (= |ULTIMATE.start_check_#in~ad1#1.offset| |ULTIMATE.start_main_~#ad1~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:40:44,630 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:40:44,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:40:44,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-25 18:40:44,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118097581] [2021-11-25 18:40:44,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:40:44,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 18:40:44,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:44,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 18:40:44,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-11-25 18:40:44,632 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:44,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:44,671 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2021-11-25 18:40:44,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:40:44,675 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-25 18:40:44,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:44,675 INFO L225 Difference]: With dead ends: 26 [2021-11-25 18:40:44,676 INFO L226 Difference]: Without dead ends: 19 [2021-11-25 18:40:44,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-11-25 18:40:44,677 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:44,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:40:44,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-25 18:40:44,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-25 18:40:44,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:44,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-25 18:40:44,682 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2021-11-25 18:40:44,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:44,683 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-25 18:40:44,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:44,683 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-25 18:40:44,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 18:40:44,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:44,684 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:44,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:40:44,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:44,904 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:40:44,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:44,905 INFO L85 PathProgramCache]: Analyzing trace with hash -210905139, now seen corresponding path program 3 times [2021-11-25 18:40:44,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:44,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015557692] [2021-11-25 18:40:44,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:44,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:40:45,081 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:45,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015557692] [2021-11-25 18:40:45,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015557692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:45,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193370088] [2021-11-25 18:40:45,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:40:45,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:45,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:45,083 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:45,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:40:45,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:40:45,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:40:45,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:40:45,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:40:45,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:40:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:40:45,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193370088] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:40:45,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [996672147] [2021-11-25 18:40:45,401 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:40:45,402 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:40:45,402 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:40:45,402 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:40:45,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:40:45,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:45,445 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 18:40:45,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 18:40:45,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:45,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 18:40:45,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:45,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:45,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 45 [2021-11-25 18:40:45,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:45,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:45,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:45,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:45,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:45,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:45,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:45,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:45,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:45,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:45,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:45,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:45,587 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 18:40:45,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 262 treesize of output 248 [2021-11-25 18:40:45,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:40:45,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 24 treesize of output 25 [2021-11-25 18:40:45,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-25 18:40:45,703 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:40:46,183 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '465#(and (<= 20 |ULTIMATE.start_main_~j~0#1|) (= (ite (= (select (select |#memory_int| |ULTIMATE.start_check_~ad1#1.base|) (+ |ULTIMATE.start_check_~ad1#1.offset| (* |ULTIMATE.start_check_~b#1| 8))) |ULTIMATE.start_check_~b#1|) 1 0) |ULTIMATE.start_check_#res#1|) (= |ULTIMATE.start_check_~ad1#1.offset| |ULTIMATE.start_check_#in~ad1#1.offset|) (<= 0 |ULTIMATE.start_main_~#ad1~0#1.base|) (= |ULTIMATE.start_check_#in~b#1| |ULTIMATE.start_check_~b#1|) (= |ULTIMATE.start_main_~ad2~0#1.offset| |ULTIMATE.start_main_~#ad1~0#1.offset|) (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_check_#in~b#1|) (= |ULTIMATE.start_main_~pa~0#1.base| |ULTIMATE.start_main_~#ad1~0#1.base|) (<= 0 (div (+ (* |ULTIMATE.start_main_~#ad1~0#1.offset| (- 1)) |ULTIMATE.start_main_~pa~0#1.offset|) 8)) (= (div (+ (* |ULTIMATE.start_main_~#ad1~0#1.offset| (- 1)) |ULTIMATE.start_main_~pa~0#1.offset|) 8) (select (select |#memory_int| |ULTIMATE.start_main_~#ad1~0#1.base|) (+ |ULTIMATE.start_main_~#ad1~0#1.offset| (* (div (+ (* |ULTIMATE.start_main_~#ad1~0#1.offset| (- 1)) |ULTIMATE.start_main_~pa~0#1.offset|) 8) 8)))) (= (mod (+ (* |ULTIMATE.start_main_~#ad1~0#1.offset| 7) |ULTIMATE.start_main_~pa~0#1.offset|) 8) 0) (= |ULTIMATE.start_main_~#ad1~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| (+ (select (select |#memory_int| |ULTIMATE.start_main_~ad2~0#1.base|) (+ |ULTIMATE.start_main_~ad2~0#1.offset| (* (div (+ (* |ULTIMATE.start_main_~#ad1~0#1.offset| (- 1)) |ULTIMATE.start_main_~pa~0#1.offset|) 8) 8))) 10)) (= |ULTIMATE.start_check_~ad1#1.base| |ULTIMATE.start_check_#in~ad1#1.base|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~ad2~0#1.base| |ULTIMATE.start_main_~#ad1~0#1.base|) (= 0 |ULTIMATE.start_check_#res#1|) (< (div (+ (* |ULTIMATE.start_main_~#ad1~0#1.offset| (- 1)) |ULTIMATE.start_main_~pa~0#1.offset|) 8) 10) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#ad1~0#1.base| |ULTIMATE.start_check_#in~ad1#1.base|) (= |ULTIMATE.start_check_#in~ad1#1.offset| |ULTIMATE.start_main_~#ad1~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 18:40:46,183 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:40:46,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:40:46,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2021-11-25 18:40:46,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684851539] [2021-11-25 18:40:46,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:40:46,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 18:40:46,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:46,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 18:40:46,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=535, Unknown=0, NotChecked=0, Total=812 [2021-11-25 18:40:46,186 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 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) [2021-11-25 18:40:46,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:46,235 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-11-25 18:40:46,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 18:40:46,236 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-25 18:40:46,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:46,237 INFO L225 Difference]: With dead ends: 36 [2021-11-25 18:40:46,237 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 18:40:46,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=277, Invalid=535, Unknown=0, NotChecked=0, Total=812 [2021-11-25 18:40:46,241 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:46,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:40:46,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 18:40:46,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-25 18:40:46,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:40:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-11-25 18:40:46,247 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 18 [2021-11-25 18:40:46,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:46,247 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-11-25 18:40:46,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 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) [2021-11-25 18:40:46,248 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-11-25 18:40:46,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 18:40:46,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:46,249 INFO L514 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:46,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:40:46,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:46,464 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:40:46,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:46,464 INFO L85 PathProgramCache]: Analyzing trace with hash -41584723, now seen corresponding path program 4 times [2021-11-25 18:40:46,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:46,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907380942] [2021-11-25 18:40:46,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:46,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:40:46,664 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 18:40:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:40:46,890 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 18:40:46,890 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 18:40:46,892 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 18:40:46,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:40:46,897 INFO L732 BasicCegarLoop]: Path program histogram: [4, 1] [2021-11-25 18:40:46,901 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 18:40:46,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:40:46 BoogieIcfgContainer [2021-11-25 18:40:46,971 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 18:40:46,972 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 18:40:46,972 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 18:40:46,972 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 18:40:46,973 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:40:40" (3/4) ... [2021-11-25 18:40:46,975 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-25 18:40:47,057 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 18:40:47,057 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 18:40:47,058 INFO L158 Benchmark]: Toolchain (without parser) took 7409.84ms. Allocated memory was 113.2MB in the beginning and 163.6MB in the end (delta: 50.3MB). Free memory was 72.6MB in the beginning and 91.9MB in the end (delta: -19.2MB). Peak memory consumption was 29.1MB. Max. memory is 16.1GB. [2021-11-25 18:40:47,058 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 113.2MB. Free memory is still 89.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:40:47,059 INFO L158 Benchmark]: CACSL2BoogieTranslator took 281.71ms. Allocated memory is still 113.2MB. Free memory was 72.4MB in the beginning and 87.2MB in the end (delta: -14.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 18:40:47,059 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.46ms. Allocated memory is still 113.2MB. Free memory was 87.2MB in the beginning and 85.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:40:47,059 INFO L158 Benchmark]: Boogie Preprocessor took 54.46ms. Allocated memory is still 113.2MB. Free memory was 85.8MB in the beginning and 84.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:40:47,060 INFO L158 Benchmark]: RCFGBuilder took 312.03ms. Allocated memory is still 113.2MB. Free memory was 84.3MB in the beginning and 73.4MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 18:40:47,060 INFO L158 Benchmark]: TraceAbstraction took 6621.82ms. Allocated memory was 113.2MB in the beginning and 163.6MB in the end (delta: 50.3MB). Free memory was 73.1MB in the beginning and 96.1MB in the end (delta: -22.9MB). Peak memory consumption was 29.5MB. Max. memory is 16.1GB. [2021-11-25 18:40:47,061 INFO L158 Benchmark]: Witness Printer took 85.64ms. Allocated memory is still 163.6MB. Free memory was 96.1MB in the beginning and 91.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 18:40:47,065 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 113.2MB. Free memory is still 89.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 281.71ms. Allocated memory is still 113.2MB. Free memory was 72.4MB in the beginning and 87.2MB in the end (delta: -14.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.46ms. Allocated memory is still 113.2MB. Free memory was 87.2MB in the beginning and 85.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 54.46ms. Allocated memory is still 113.2MB. Free memory was 85.8MB in the beginning and 84.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 312.03ms. Allocated memory is still 113.2MB. Free memory was 84.3MB in the beginning and 73.4MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 6621.82ms. Allocated memory was 113.2MB in the beginning and 163.6MB in the end (delta: 50.3MB). Free memory was 73.1MB in the beginning and 96.1MB in the end (delta: -22.9MB). Peak memory consumption was 29.5MB. Max. memory is 16.1GB. * Witness Printer took 85.64ms. Allocated memory is still 163.6MB. Free memory was 96.1MB in the beginning and 91.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 39]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] struct dummy ad1[20], *ad2; [L18] int i, j, *pa; [L19] j=0 VAL [ad1={5:0}, j=0] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=1] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=2] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=3] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=4] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=5] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=6] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=7] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=8] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=9] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=10] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=11] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=12] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=13] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=14] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=15] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=16] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=17] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=18] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=19] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=20] [L19] COND FALSE !(j<20) [L23] i = __VERIFIER_nondet_int() [L24] COND TRUE i >= 0 && i < 10 [L25] ad2 = ad1 [L26] ad1[i].a = i [L27] pa = &ad1[i].a [L28] EXPR ad2[i].a [L28] i = ad2[i].a + 10 [L29] EXPR \read(*pa) VAL [\read(*pa)=0, ad1={5:0}, ad2={5:0}, i=10, j=20, pa={5:0}] [L29] COND FALSE !(i < *pa) [L32] CALL, EXPR check(ad1, i) [L12] EXPR ad1[b].a [L12] return ad1[b].a == b; [L32] RET, EXPR check(ad1, i) [L32] COND TRUE !check(ad1, i) [L39] reach_error() VAL [ad1={5:0}, ad2={5:0}, i=10, j=20, pa={5:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.5s, OverallIterations: 5, TraceHistogramMax: 20, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 90 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 74 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 73 IncrementalHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 27 mSDtfsCounter, 73 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 134 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=4, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 224 SizeOfPredicates, 0 NumberOfNonLiveVariables, 447 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 0/198 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-25 18:40:47,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cdece13-70ea-4f1d-b279-c20ea1fb9bc2/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE