./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/underapprox_2-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_2-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dc138f274319e5e58145eabf3fb84043b6d1bd3c616751e51efeb5e2ee2997a6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 09:46:08,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:46:08,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:46:08,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:46:08,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:46:08,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:46:08,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:46:08,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:46:08,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:46:08,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:46:08,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:46:08,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:46:08,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:46:08,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:46:08,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:46:08,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:46:08,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:46:08,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:46:08,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:46:08,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:46:08,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:46:08,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:46:08,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:46:08,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:46:08,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:46:08,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:46:08,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:46:08,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:46:08,400 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:46:08,401 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:46:08,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:46:08,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:46:08,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:46:08,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:46:08,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:46:08,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:46:08,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:46:08,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:46:08,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:46:08,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:46:08,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:46:08,407 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:46:08,428 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:46:08,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:46:08,429 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:46:08,429 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:46:08,430 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:46:08,430 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:46:08,430 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:46:08,430 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:46:08,430 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:46:08,431 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:46:08,431 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:46:08,431 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:46:08,431 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:46:08,431 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:46:08,431 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:46:08,432 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:46:08,432 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:46:08,432 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:46:08,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:46:08,433 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:46:08,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:46:08,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:46:08,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:46:08,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:46:08,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:46:08,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:46:08,434 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:46:08,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:46:08,434 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:46:08,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:46:08,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:46:08,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:46:08,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:46:08,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:46:08,435 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:46:08,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:46:08,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:46:08,436 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:46:08,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:46:08,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:46:08,436 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:46:08,436 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dc138f274319e5e58145eabf3fb84043b6d1bd3c616751e51efeb5e2ee2997a6 [2022-12-14 09:46:08,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:46:08,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:46:08,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:46:08,651 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:46:08,652 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:46:08,653 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/loop-acceleration/underapprox_2-1.c [2022-12-14 09:46:11,207 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:46:11,362 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:46:11,363 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/sv-benchmarks/c/loop-acceleration/underapprox_2-1.c [2022-12-14 09:46:11,367 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/data/7436cbd6c/e9d0ac526dfc43de99167a79c142b4fc/FLAGba0e947b5 [2022-12-14 09:46:11,779 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/data/7436cbd6c/e9d0ac526dfc43de99167a79c142b4fc [2022-12-14 09:46:11,780 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:46:11,781 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:46:11,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:46:11,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:46:11,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:46:11,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:46:11" (1/1) ... [2022-12-14 09:46:11,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e19d475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:46:11, skipping insertion in model container [2022-12-14 09:46:11,786 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:46:11" (1/1) ... [2022-12-14 09:46:11,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:46:11,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:46:11,892 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/sv-benchmarks/c/loop-acceleration/underapprox_2-1.c[327,340] [2022-12-14 09:46:11,900 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:46:11,907 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:46:11,915 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/sv-benchmarks/c/loop-acceleration/underapprox_2-1.c[327,340] [2022-12-14 09:46:11,916 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:46:11,925 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:46:11,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:46:11 WrapperNode [2022-12-14 09:46:11,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:46:11,926 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:46:11,926 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:46:11,926 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:46:11,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:46:11" (1/1) ... [2022-12-14 09:46:11,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:46:11" (1/1) ... [2022-12-14 09:46:11,947 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2022-12-14 09:46:11,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:46:11,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:46:11,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:46:11,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:46:11,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:46:11" (1/1) ... [2022-12-14 09:46:11,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:46:11" (1/1) ... [2022-12-14 09:46:11,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:46:11" (1/1) ... [2022-12-14 09:46:11,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:46:11" (1/1) ... [2022-12-14 09:46:11,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:46:11" (1/1) ... [2022-12-14 09:46:11,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:46:11" (1/1) ... [2022-12-14 09:46:11,958 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:46:11" (1/1) ... [2022-12-14 09:46:11,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:46:11" (1/1) ... [2022-12-14 09:46:11,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:46:11,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:46:11,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:46:11,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:46:11,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:46:11" (1/1) ... [2022-12-14 09:46:11,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:46:11,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:46:11,981 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:46:11,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:46:12,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:46:12,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:46:12,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:46:12,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:46:12,070 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:46:12,072 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:46:12,150 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:46:12,165 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:46:12,165 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 09:46:12,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:46:12 BoogieIcfgContainer [2022-12-14 09:46:12,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:46:12,169 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:46:12,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:46:12,171 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:46:12,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:46:11" (1/3) ... [2022-12-14 09:46:12,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2082abed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:46:12, skipping insertion in model container [2022-12-14 09:46:12,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:46:11" (2/3) ... [2022-12-14 09:46:12,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2082abed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:46:12, skipping insertion in model container [2022-12-14 09:46:12,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:46:12" (3/3) ... [2022-12-14 09:46:12,173 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2022-12-14 09:46:12,187 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:46:12,187 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 09:46:12,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:46:12,227 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@24d36c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:46:12,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 09:46:12,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:46:12,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 09:46:12,235 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:46:12,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 09:46:12,236 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:46:12,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:46:12,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1850503, now seen corresponding path program 1 times [2022-12-14 09:46:12,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:46:12,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405027990] [2022-12-14 09:46:12,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:46:12,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:46:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:46:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:46:12,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:46:12,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405027990] [2022-12-14 09:46:12,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405027990] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:46:12,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:46:12,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:46:12,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806220559] [2022-12-14 09:46:12,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:46:12,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:46:12,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:46:12,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:46:12,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:46:12,498 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:46:12,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:46:12,528 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2022-12-14 09:46:12,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:46:12,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-12-14 09:46:12,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:46:12,535 INFO L225 Difference]: With dead ends: 13 [2022-12-14 09:46:12,535 INFO L226 Difference]: Without dead ends: 6 [2022-12-14 09:46:12,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:46:12,539 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:46:12,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 7 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:46:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2022-12-14 09:46:12,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2022-12-14 09:46:12,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:46:12,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2022-12-14 09:46:12,561 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2022-12-14 09:46:12,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:46:12,561 INFO L495 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2022-12-14 09:46:12,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:46:12,561 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2022-12-14 09:46:12,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 09:46:12,562 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:46:12,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 09:46:12,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:46:12,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:46:12,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:46:12,563 INFO L85 PathProgramCache]: Analyzing trace with hash 56695734, now seen corresponding path program 1 times [2022-12-14 09:46:12,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:46:12,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717029233] [2022-12-14 09:46:12,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:46:12,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:46:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:46:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:46:12,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:46:12,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717029233] [2022-12-14 09:46:12,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717029233] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:46:12,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735074436] [2022-12-14 09:46:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:46:12,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:46:12,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:46:12,676 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:46:12,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:46:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:46:12,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:46:12,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:46:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:46:12,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:46:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:46:12,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735074436] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:46:12,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1200987154] [2022-12-14 09:46:12,828 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 09:46:12,829 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:46:12,831 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:46:12,836 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:46:12,836 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:46:12,974 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:46:13,051 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '71#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (= (ite (not (= 6 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:46:13,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:46:13,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:46:13,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2022-12-14 09:46:13,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233607258] [2022-12-14 09:46:13,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:46:13,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:46:13,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:46:13,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:46:13,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:46:13,054 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:46:13,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:46:13,108 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2022-12-14 09:46:13,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:46:13,108 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 09:46:13,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:46:13,108 INFO L225 Difference]: With dead ends: 13 [2022-12-14 09:46:13,108 INFO L226 Difference]: Without dead ends: 9 [2022-12-14 09:46:13,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-14 09:46:13,110 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:46:13,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 7 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:46:13,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-12-14 09:46:13,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-12-14 09:46:13,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:46:13,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-12-14 09:46:13,113 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-12-14 09:46:13,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:46:13,113 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-12-14 09:46:13,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:46:13,113 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-12-14 09:46:13,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 09:46:13,113 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:46:13,113 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2022-12-14 09:46:13,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:46:13,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:46:13,315 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:46:13,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:46:13,315 INFO L85 PathProgramCache]: Analyzing trace with hash 435294279, now seen corresponding path program 2 times [2022-12-14 09:46:13,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:46:13,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735811322] [2022-12-14 09:46:13,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:46:13,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:46:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:46:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:46:13,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:46:13,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735811322] [2022-12-14 09:46:13,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735811322] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:46:13,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475955825] [2022-12-14 09:46:13,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:46:13,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:46:13,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:46:13,475 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:46:13,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:46:13,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 09:46:13,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:46:13,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 09:46:13,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:46:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:46:13,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:46:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:46:13,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475955825] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:46:13,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [991793877] [2022-12-14 09:46:13,664 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 09:46:13,665 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:46:13,665 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:46:13,665 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:46:13,665 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:46:13,745 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:46:13,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '166#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (= (ite (not (= 6 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:46:13,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:46:13,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:46:13,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2022-12-14 09:46:13,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872616887] [2022-12-14 09:46:13,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:46:13,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 09:46:13,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:46:13,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 09:46:13,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-12-14 09:46:13,879 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:46:14,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:46:14,339 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2022-12-14 09:46:14,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 09:46:14,339 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 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 8 [2022-12-14 09:46:14,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:46:14,339 INFO L225 Difference]: With dead ends: 19 [2022-12-14 09:46:14,339 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 09:46:14,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-12-14 09:46:14,340 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 21 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:46:14,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 11 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:46:14,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 09:46:14,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-14 09:46:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 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) [2022-12-14 09:46:14,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-12-14 09:46:14,344 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2022-12-14 09:46:14,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:46:14,345 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-12-14 09:46:14,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:46:14,345 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-12-14 09:46:14,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 09:46:14,345 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:46:14,345 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2022-12-14 09:46:14,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:46:14,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-14 09:46:14,546 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:46:14,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:46:14,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1684538919, now seen corresponding path program 3 times [2022-12-14 09:46:14,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:46:14,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127821791] [2022-12-14 09:46:14,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:46:14,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:46:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 09:46:14,559 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 09:46:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 09:46:14,584 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 09:46:14,585 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 09:46:14,586 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 09:46:14,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 09:46:14,592 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2022-12-14 09:46:14,596 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 09:46:14,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 09:46:14 BoogieIcfgContainer [2022-12-14 09:46:14,618 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 09:46:14,618 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 09:46:14,618 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 09:46:14,619 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 09:46:14,619 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:46:12" (3/4) ... [2022-12-14 09:46:14,622 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 09:46:14,660 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 09:46:14,661 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 09:46:14,661 INFO L158 Benchmark]: Toolchain (without parser) took 2879.81ms. Allocated memory was 144.7MB in the beginning and 174.1MB in the end (delta: 29.4MB). Free memory was 107.8MB in the beginning and 104.1MB in the end (delta: 3.7MB). Peak memory consumption was 31.9MB. Max. memory is 16.1GB. [2022-12-14 09:46:14,662 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 144.7MB. Free memory is still 115.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 09:46:14,662 INFO L158 Benchmark]: CACSL2BoogieTranslator took 143.56ms. Allocated memory is still 144.7MB. Free memory was 107.8MB in the beginning and 97.8MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 09:46:14,662 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.78ms. Allocated memory is still 144.7MB. Free memory was 97.8MB in the beginning and 96.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 09:46:14,662 INFO L158 Benchmark]: Boogie Preprocessor took 12.20ms. Allocated memory is still 144.7MB. Free memory was 96.4MB in the beginning and 95.7MB in the end (delta: 662.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:46:14,663 INFO L158 Benchmark]: RCFGBuilder took 207.15ms. Allocated memory is still 144.7MB. Free memory was 95.3MB in the beginning and 85.7MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-14 09:46:14,663 INFO L158 Benchmark]: TraceAbstraction took 2448.86ms. Allocated memory was 144.7MB in the beginning and 174.1MB in the end (delta: 29.4MB). Free memory was 85.2MB in the beginning and 106.2MB in the end (delta: -21.0MB). Peak memory consumption was 6.7MB. Max. memory is 16.1GB. [2022-12-14 09:46:14,663 INFO L158 Benchmark]: Witness Printer took 42.47ms. Allocated memory is still 174.1MB. Free memory was 106.2MB in the beginning and 104.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:46:14,665 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 144.7MB. Free memory is still 115.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 143.56ms. Allocated memory is still 144.7MB. Free memory was 107.8MB in the beginning and 97.8MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.78ms. Allocated memory is still 144.7MB. Free memory was 97.8MB in the beginning and 96.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 12.20ms. Allocated memory is still 144.7MB. Free memory was 96.4MB in the beginning and 95.7MB in the end (delta: 662.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 207.15ms. Allocated memory is still 144.7MB. Free memory was 95.3MB in the beginning and 85.7MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 2448.86ms. Allocated memory was 144.7MB in the beginning and 174.1MB in the end (delta: 29.4MB). Free memory was 85.2MB in the beginning and 106.2MB in the end (delta: -21.0MB). Peak memory consumption was 6.7MB. Max. memory is 16.1GB. * Witness Printer took 42.47ms. Allocated memory is still 174.1MB. Free memory was 106.2MB in the beginning and 104.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L13] unsigned int x = 0; [L14] unsigned int y = 1; VAL [x=0, y=1] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=1, y=2] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=2, y=4] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=3, y=8] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=4, y=16] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=5, y=32] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=6, y=64] [L16] COND FALSE !(x < 6) [L21] CALL __VERIFIER_assert(x != 6) [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.4s, OverallIterations: 4, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 27 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 27 mSDsluCounter, 25 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 18 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 83 IncrementalHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 7 mSDtfsCounter, 83 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=3, InterpolantAutomatonStates: 26, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 172 SizeOfPredicates, 4 NumberOfNonLiveVariables, 99 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 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! [2022-12-14 09:46:14,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55d301df-eb0a-4a9f-ad65-688ddc7d983d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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