./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a0c2ad-1ca9-4df5-93d7-e16e7050d065/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a0c2ad-1ca9-4df5-93d7-e16e7050d065/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a0c2ad-1ca9-4df5-93d7-e16e7050d065/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a0c2ad-1ca9-4df5-93d7-e16e7050d065/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a0c2ad-1ca9-4df5-93d7-e16e7050d065/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a0c2ad-1ca9-4df5-93d7-e16e7050d065/bin/utaipan-Xvt2sAort0 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 37f79062fe3be0abf370e94726d24a3524d934123ef5393980d7efccb29185f4 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 19:58:45,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:58:45,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:58:46,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:58:46,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:58:46,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:58:46,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:58:46,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:58:46,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:58:46,020 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:58:46,021 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:58:46,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:58:46,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:58:46,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:58:46,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:58:46,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:58:46,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:58:46,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:58:46,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:58:46,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:58:46,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:58:46,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:58:46,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:58:46,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:58:46,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:58:46,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:58:46,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:58:46,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:58:46,043 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:58:46,044 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:58:46,044 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:58:46,045 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:58:46,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:58:46,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:58:46,048 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:58:46,049 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:58:46,049 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:58:46,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:58:46,050 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:58:46,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:58:46,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:58:46,053 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a0c2ad-1ca9-4df5-93d7-e16e7050d065/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 19:58:46,077 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:58:46,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:58:46,078 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:58:46,078 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:58:46,079 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:58:46,079 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:58:46,079 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:58:46,080 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:58:46,080 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:58:46,080 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:58:46,081 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:58:46,081 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:58:46,081 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:58:46,082 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:58:46,082 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:58:46,082 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:58:46,083 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:58:46,083 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:58:46,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:58:46,084 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:58:46,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:58:46,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:58:46,085 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:58:46,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:58:46,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:58:46,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:58:46,086 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:58:46,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:58:46,087 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:58:46,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:58:46,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:58:46,088 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:58:46,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:58:46,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:58:46,089 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:58:46,089 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:58:46,089 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:58:46,090 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:58:46,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:58:46,090 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:58:46,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:58:46,091 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_e9a0c2ad-1ca9-4df5-93d7-e16e7050d065/bin/utaipan-Xvt2sAort0/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a0c2ad-1ca9-4df5-93d7-e16e7050d065/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37f79062fe3be0abf370e94726d24a3524d934123ef5393980d7efccb29185f4 [2022-11-16 19:58:46,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:58:46,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:58:46,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:58:46,362 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:58:46,364 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:58:46,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a0c2ad-1ca9-4df5-93d7-e16e7050d065/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/eca-rers2012/Problem14_label50.c [2022-11-16 19:58:46,454 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a0c2ad-1ca9-4df5-93d7-e16e7050d065/bin/utaipan-Xvt2sAort0/data/aa2b27598/1e87c5a50e1e4d4492eea7aac9465a6d/FLAG4f0b39430 [2022-11-16 19:58:47,007 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:58:47,008 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a0c2ad-1ca9-4df5-93d7-e16e7050d065/sv-benchmarks/c/eca-rers2012/Problem14_label50.c [2022-11-16 19:58:47,021 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a0c2ad-1ca9-4df5-93d7-e16e7050d065/bin/utaipan-Xvt2sAort0/data/aa2b27598/1e87c5a50e1e4d4492eea7aac9465a6d/FLAG4f0b39430 [2022-11-16 19:58:47,284 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a0c2ad-1ca9-4df5-93d7-e16e7050d065/bin/utaipan-Xvt2sAort0/data/aa2b27598/1e87c5a50e1e4d4492eea7aac9465a6d [2022-11-16 19:58:47,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:58:47,288 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:58:47,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:58:47,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:58:47,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:58:47,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:58:47" (1/1) ... [2022-11-16 19:58:47,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bcbe83f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:47, skipping insertion in model container [2022-11-16 19:58:47,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:58:47" (1/1) ... [2022-11-16 19:58:47,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:58:47,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:58:47,609 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a0c2ad-1ca9-4df5-93d7-e16e7050d065/sv-benchmarks/c/eca-rers2012/Problem14_label50.c[3933,3946] [2022-11-16 19:58:47,822 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:58:47,830 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:58:47,848 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a0c2ad-1ca9-4df5-93d7-e16e7050d065/sv-benchmarks/c/eca-rers2012/Problem14_label50.c[3933,3946] [2022-11-16 19:58:47,966 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:58:47,980 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:58:47,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:47 WrapperNode [2022-11-16 19:58:47,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:58:47,982 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:58:47,982 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:58:47,982 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:58:47,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:47" (1/1) ... [2022-11-16 19:58:48,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:47" (1/1) ... [2022-11-16 19:58:48,122 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 858 [2022-11-16 19:58:48,123 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:58:48,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:58:48,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:58:48,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:58:48,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:47" (1/1) ... [2022-11-16 19:58:48,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:47" (1/1) ... [2022-11-16 19:58:48,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:47" (1/1) ... [2022-11-16 19:58:48,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:47" (1/1) ... [2022-11-16 19:58:48,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:47" (1/1) ... [2022-11-16 19:58:48,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:47" (1/1) ... [2022-11-16 19:58:48,248 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:47" (1/1) ... [2022-11-16 19:58:48,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:47" (1/1) ... [2022-11-16 19:58:48,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:58:48,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:58:48,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:58:48,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:58:48,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:47" (1/1) ... [2022-11-16 19:58:48,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:58:48,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a0c2ad-1ca9-4df5-93d7-e16e7050d065/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:58:48,292 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a0c2ad-1ca9-4df5-93d7-e16e7050d065/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:58:48,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a0c2ad-1ca9-4df5-93d7-e16e7050d065/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:58:48,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:58:48,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:58:48,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:58:48,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:58:48,418 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:58:48,421 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:58:49,850 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:58:54,371 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:58:54,371 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 19:58:54,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:58:54 BoogieIcfgContainer [2022-11-16 19:58:54,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:58:54,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:58:54,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:58:54,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:58:54,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:58:47" (1/3) ... [2022-11-16 19:58:54,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@431819ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:58:54, skipping insertion in model container [2022-11-16 19:58:54,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:58:47" (2/3) ... [2022-11-16 19:58:54,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@431819ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:58:54, skipping insertion in model container [2022-11-16 19:58:54,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:58:54" (3/3) ... [2022-11-16 19:58:54,388 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label50.c [2022-11-16 19:58:54,410 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:58:54,410 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 19:58:54,464 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:58:54,471 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;@f50ee4c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:58:54,471 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 19:58:54,476 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:54,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 19:58:54,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:58:54,483 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 19:58:54,483 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:58:54,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:58:54,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1065570151, now seen corresponding path program 1 times [2022-11-16 19:58:54,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:58:54,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861626294] [2022-11-16 19:58:54,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:54,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:58:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:58:54,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:58:54,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861626294] [2022-11-16 19:58:54,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861626294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:58:54,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:58:54,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:58:54,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545809854] [2022-11-16 19:58:54,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:58:54,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:58:54,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:58:54,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:58:54,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:58:54,918 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 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) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:55,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:58:55,116 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2022-11-16 19:58:55,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:58:55,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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 [2022-11-16 19:58:55,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:58:55,129 INFO L225 Difference]: With dead ends: 29 [2022-11-16 19:58:55,129 INFO L226 Difference]: Without dead ends: 15 [2022-11-16 19:58:55,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:58:55,143 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:58:55,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 10 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:58:55,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-16 19:58:55,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-11-16 19:58:55,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 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) [2022-11-16 19:58:55,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-11-16 19:58:55,176 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 5 [2022-11-16 19:58:55,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:58:55,176 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-11-16 19:58:55,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:55,177 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-11-16 19:58:55,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 19:58:55,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:58:55,179 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1] [2022-11-16 19:58:55,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:58:55,180 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:58:55,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:58:55,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1142107909, now seen corresponding path program 1 times [2022-11-16 19:58:55,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:58:55,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196128352] [2022-11-16 19:58:55,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:55,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:58:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:59:43,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:43,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196128352] [2022-11-16 19:59:43,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196128352] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:59:43,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923574291] [2022-11-16 19:59:43,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:43,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:43,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a0c2ad-1ca9-4df5-93d7-e16e7050d065/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:59:43,046 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a0c2ad-1ca9-4df5-93d7-e16e7050d065/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:59:43,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9a0c2ad-1ca9-4df5-93d7-e16e7050d065/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:59:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:43,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:59:43,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:07:41,536 WARN L233 SmtUtils]: Spent 12.90s on a formula simplification. DAG size of input: 290 DAG size of output: 87 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:07:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:07:42,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:08:22,577 WARN L233 SmtUtils]: Spent 39.89s on a formula simplification. DAG size of input: 2572 DAG size of output: 2572 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)