./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f46be8-a136-427e-905b-097ffb73c503/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f46be8-a136-427e-905b-097ffb73c503/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_80f46be8-a136-427e-905b-097ffb73c503/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f46be8-a136-427e-905b-097ffb73c503/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f46be8-a136-427e-905b-097ffb73c503/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_80f46be8-a136-427e-905b-097ffb73c503/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 76982ccfa15d5420010caf48ff31900a394710bc42d46403e291e5b0b2cbfb5b --- 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 20:01:23,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:01:23,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:01:23,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:01:23,199 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:01:23,200 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:01:23,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:01:23,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:01:23,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:01:23,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:01:23,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:01:23,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:01:23,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:01:23,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:01:23,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:01:23,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:01:23,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:01:23,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:01:23,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:01:23,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:01:23,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:01:23,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:01:23,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:01:23,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:01:23,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:01:23,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:01:23,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:01:23,259 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:01:23,259 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:01:23,260 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:01:23,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:01:23,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:01:23,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:01:23,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:01:23,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:01:23,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:01:23,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:01:23,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:01:23,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:01:23,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:01:23,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:01:23,271 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f46be8-a136-427e-905b-097ffb73c503/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 20:01:23,317 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:01:23,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:01:23,318 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:01:23,318 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:01:23,319 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:01:23,319 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:01:23,320 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:01:23,320 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:01:23,320 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:01:23,320 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:01:23,321 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:01:23,322 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:01:23,322 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:01:23,322 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:01:23,322 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:01:23,323 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:01:23,323 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:01:23,323 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:01:23,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:01:23,324 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:01:23,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:01:23,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:01:23,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:01:23,326 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:01:23,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:01:23,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:01:23,327 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:01:23,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:01:23,327 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:01:23,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:01:23,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:01:23,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:01:23,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:01:23,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:01:23,329 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:01:23,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:01:23,330 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:01:23,330 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:01:23,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:01:23,330 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:01:23,331 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:01:23,331 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_80f46be8-a136-427e-905b-097ffb73c503/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f46be8-a136-427e-905b-097ffb73c503/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76982ccfa15d5420010caf48ff31900a394710bc42d46403e291e5b0b2cbfb5b [2022-11-16 20:01:23,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:01:23,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:01:23,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:01:23,667 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:01:23,667 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:01:23,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f46be8-a136-427e-905b-097ffb73c503/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c [2022-11-16 20:01:23,753 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f46be8-a136-427e-905b-097ffb73c503/bin/utaipan-Xvt2sAort0/data/b8cc1b3bd/50a74edead7d4a438e0cb17e466dc120/FLAG3ff005577 [2022-11-16 20:01:24,255 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:01:24,255 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f46be8-a136-427e-905b-097ffb73c503/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c [2022-11-16 20:01:24,263 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f46be8-a136-427e-905b-097ffb73c503/bin/utaipan-Xvt2sAort0/data/b8cc1b3bd/50a74edead7d4a438e0cb17e466dc120/FLAG3ff005577 [2022-11-16 20:01:24,616 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f46be8-a136-427e-905b-097ffb73c503/bin/utaipan-Xvt2sAort0/data/b8cc1b3bd/50a74edead7d4a438e0cb17e466dc120 [2022-11-16 20:01:24,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:01:24,623 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:01:24,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:01:24,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:01:24,631 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:01:24,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:01:24" (1/1) ... [2022-11-16 20:01:24,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cf31dea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:24, skipping insertion in model container [2022-11-16 20:01:24,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:01:24" (1/1) ... [2022-11-16 20:01:24,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:01:24,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:01:24,921 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_80f46be8-a136-427e-905b-097ffb73c503/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c[6803,6816] [2022-11-16 20:01:24,924 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:01:24,933 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:01:24,971 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_80f46be8-a136-427e-905b-097ffb73c503/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c[6803,6816] [2022-11-16 20:01:24,972 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:01:24,987 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:01:24,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:24 WrapperNode [2022-11-16 20:01:24,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:01:24,989 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:01:24,989 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:01:24,989 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:01:24,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:24" (1/1) ... [2022-11-16 20:01:25,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:24" (1/1) ... [2022-11-16 20:01:25,058 INFO L138 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 228 [2022-11-16 20:01:25,059 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:01:25,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:01:25,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:01:25,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:01:25,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:24" (1/1) ... [2022-11-16 20:01:25,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:24" (1/1) ... [2022-11-16 20:01:25,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:24" (1/1) ... [2022-11-16 20:01:25,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:24" (1/1) ... [2022-11-16 20:01:25,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:24" (1/1) ... [2022-11-16 20:01:25,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:24" (1/1) ... [2022-11-16 20:01:25,096 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:24" (1/1) ... [2022-11-16 20:01:25,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:24" (1/1) ... [2022-11-16 20:01:25,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:01:25,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:01:25,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:01:25,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:01:25,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:24" (1/1) ... [2022-11-16 20:01:25,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:01:25,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f46be8-a136-427e-905b-097ffb73c503/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:01:25,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f46be8-a136-427e-905b-097ffb73c503/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:01:25,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f46be8-a136-427e-905b-097ffb73c503/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:01:25,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:01:25,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:01:25,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:01:25,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:01:25,306 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:01:25,307 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:01:25,657 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:01:26,106 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:01:26,107 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 20:01:26,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:01:26 BoogieIcfgContainer [2022-11-16 20:01:26,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:01:26,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:01:26,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:01:26,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:01:26,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:01:24" (1/3) ... [2022-11-16 20:01:26,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13080bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:01:26, skipping insertion in model container [2022-11-16 20:01:26,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:24" (2/3) ... [2022-11-16 20:01:26,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13080bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:01:26, skipping insertion in model container [2022-11-16 20:01:26,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:01:26" (3/3) ... [2022-11-16 20:01:26,123 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c [2022-11-16 20:01:26,143 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:01:26,144 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:01:26,212 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:01:26,218 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;@1d70eac6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:01:26,219 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:01:26,224 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) [2022-11-16 20:01:26,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 20:01:26,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:01:26,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 20:01:26,231 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:01:26,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:01:26,237 INFO L85 PathProgramCache]: Analyzing trace with hash 13055434, now seen corresponding path program 1 times [2022-11-16 20:01:26,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:01:26,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549278491] [2022-11-16 20:01:26,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:01:26,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:01:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:01:27,944 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 20:01:27,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:01:27,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549278491] [2022-11-16 20:01:27,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549278491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:01:27,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:01:27,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:01:27,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243738135] [2022-11-16 20:01:27,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:01:27,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:01:27,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:01:27,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:01:27,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:01:28,004 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) [2022-11-16 20:01:28,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:01:28,091 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-11-16 20:01:28,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:01:28,094 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 [2022-11-16 20:01:28,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:01:28,102 INFO L225 Difference]: With dead ends: 19 [2022-11-16 20:01:28,103 INFO L226 Difference]: Without dead ends: 10 [2022-11-16 20:01:28,108 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 [2022-11-16 20:01:28,113 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:01:28,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:01:28,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-16 20:01:28,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2022-11-16 20:01:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2022-11-16 20:01:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2022-11-16 20:01:28,158 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2022-11-16 20:01:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:01:28,159 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2022-11-16 20:01:28,160 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) [2022-11-16 20:01:28,160 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2022-11-16 20:01:28,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 20:01:28,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:01:28,162 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-16 20:01:28,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:01:28,163 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:01:28,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:01:28,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1902458614, now seen corresponding path program 1 times [2022-11-16 20:01:28,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:01:28,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259917539] [2022-11-16 20:01:28,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:01:28,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:01:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:01:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:01:34,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:01:34,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259917539] [2022-11-16 20:01:34,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259917539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:01:34,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098519781] [2022-11-16 20:01:34,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:01:34,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:01:34,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f46be8-a136-427e-905b-097ffb73c503/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:01:34,271 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f46be8-a136-427e-905b-097ffb73c503/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:01:34,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80f46be8-a136-427e-905b-097ffb73c503/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:01:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:01:34,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-16 20:01:34,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:01:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:01:37,743 INFO L328 TraceCheckSpWp]: Computing backward predicates...