./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c25f59c5-41ab-4396-8050-1c805e087f6c/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c25f59c5-41ab-4396-8050-1c805e087f6c/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c25f59c5-41ab-4396-8050-1c805e087f6c/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c25f59c5-41ab-4396-8050-1c805e087f6c/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c25f59c5-41ab-4396-8050-1c805e087f6c/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c25f59c5-41ab-4396-8050-1c805e087f6c/bin/utaipan-aC7eJsxGYH --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 e5443f8a2fddbc0dcee6c49bebdf35f1e136769ad8bf83fa6d0886ad97d80161 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:18:58,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:18:58,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:18:58,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:18:58,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:18:58,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:18:58,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:18:58,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:18:58,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:18:58,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:18:58,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:18:58,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:18:58,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:18:58,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:18:58,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:18:58,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:18:58,196 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:18:58,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:18:58,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:18:58,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:18:58,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:18:58,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:18:58,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:18:58,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:18:58,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:18:58,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:18:58,211 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:18:58,212 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:18:58,213 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:18:58,214 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:18:58,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:18:58,216 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:18:58,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:18:58,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:18:58,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:18:58,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:18:58,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:18:58,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:18:58,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:18:58,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:18:58,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:18:58,228 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c25f59c5-41ab-4396-8050-1c805e087f6c/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:18:58,261 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:18:58,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:18:58,267 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:18:58,267 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:18:58,267 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:18:58,268 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:18:58,268 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:18:58,268 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:18:58,268 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:18:58,268 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:18:58,270 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:18:58,270 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:18:58,270 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:18:58,270 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:18:58,271 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:18:58,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:18:58,272 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:18:58,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:18:58,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:18:58,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:18:58,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:18:58,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:18:58,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:18:58,273 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:18:58,273 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:18:58,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:18:58,274 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:18:58,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:18:58,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:18:58,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:18:58,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:18:58,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:18:58,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:18:58,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:18:58,277 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:18:58,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:18:58,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:18:58,278 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:18:58,278 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:18:58,278 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c25f59c5-41ab-4396-8050-1c805e087f6c/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c25f59c5-41ab-4396-8050-1c805e087f6c/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5443f8a2fddbc0dcee6c49bebdf35f1e136769ad8bf83fa6d0886ad97d80161 [2021-11-03 04:18:58,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:18:58,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:18:58,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:18:58,614 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:18:58,615 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:18:58,616 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c25f59c5-41ab-4396-8050-1c805e087f6c/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c [2021-11-03 04:18:58,693 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c25f59c5-41ab-4396-8050-1c805e087f6c/bin/utaipan-aC7eJsxGYH/data/12cc29294/f2f9f5aa18bf469e9478823cef1b40c3/FLAG0ad07c11f [2021-11-03 04:18:59,552 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:18:59,552 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c25f59c5-41ab-4396-8050-1c805e087f6c/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c [2021-11-03 04:18:59,600 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c25f59c5-41ab-4396-8050-1c805e087f6c/bin/utaipan-aC7eJsxGYH/data/12cc29294/f2f9f5aa18bf469e9478823cef1b40c3/FLAG0ad07c11f [2021-11-03 04:19:00,004 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c25f59c5-41ab-4396-8050-1c805e087f6c/bin/utaipan-aC7eJsxGYH/data/12cc29294/f2f9f5aa18bf469e9478823cef1b40c3 [2021-11-03 04:19:00,015 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:19:00,019 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:19:00,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:19:00,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:19:00,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:19:00,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:19:00" (1/1) ... [2021-11-03 04:19:00,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3daebdab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:00, skipping insertion in model container [2021-11-03 04:19:00,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:19:00" (1/1) ... [2021-11-03 04:19:00,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:19:00,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:19:00,721 WARN L228 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_c25f59c5-41ab-4396-8050-1c805e087f6c/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c[15623,15636] [2021-11-03 04:19:00,818 WARN L228 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_c25f59c5-41ab-4396-8050-1c805e087f6c/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c[22441,22454] [2021-11-03 04:19:01,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:19:01,843 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:19:01,884 WARN L228 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_c25f59c5-41ab-4396-8050-1c805e087f6c/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c[15623,15636] [2021-11-03 04:19:01,901 WARN L228 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_c25f59c5-41ab-4396-8050-1c805e087f6c/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c[22441,22454] [2021-11-03 04:19:02,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:19:02,661 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:19:02,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:02 WrapperNode [2021-11-03 04:19:02,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:19:02,663 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:19:02,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:19:02,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:19:02,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:02" (1/1) ... [2021-11-03 04:19:02,729 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:02" (1/1) ... [2021-11-03 04:19:03,245 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:19:03,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:19:03,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:19:03,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:19:03,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:02" (1/1) ... [2021-11-03 04:19:03,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:02" (1/1) ... [2021-11-03 04:19:03,377 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:02" (1/1) ... [2021-11-03 04:19:03,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:02" (1/1) ... [2021-11-03 04:19:03,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:02" (1/1) ... [2021-11-03 04:19:03,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:02" (1/1) ... [2021-11-03 04:19:03,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:02" (1/1) ... [2021-11-03 04:19:03,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:19:03,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:19:03,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:19:03,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:19:03,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:02" (1/1) ... [2021-11-03 04:19:03,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:19:03,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c25f59c5-41ab-4396-8050-1c805e087f6c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:19:03,791 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c25f59c5-41ab-4396-8050-1c805e087f6c/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:19:03,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c25f59c5-41ab-4396-8050-1c805e087f6c/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:19:03,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:19:03,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:19:03,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:19:03,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:31:13,450 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:31:13,450 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2021-11-03 04:31:13,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:31:13 BoogieIcfgContainer [2021-11-03 04:31:13,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:31:13,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:31:13,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:31:13,463 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:31:13,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:19:00" (1/3) ... [2021-11-03 04:31:13,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5569e9c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:31:13, skipping insertion in model container [2021-11-03 04:31:13,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:19:02" (2/3) ... [2021-11-03 04:31:13,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5569e9c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:31:13, skipping insertion in model container [2021-11-03 04:31:13,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:31:13" (3/3) ... [2021-11-03 04:31:13,466 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label04.c [2021-11-03 04:31:13,492 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:31:13,497 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-03 04:31:13,604 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:31:13,612 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:31:13,612 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-03 04:31:13,640 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:13,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:31:13,644 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:13,645 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:31:13,645 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:31:13,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:13,650 INFO L85 PathProgramCache]: Analyzing trace with hash 847400816, now seen corresponding path program 1 times [2021-11-03 04:31:13,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:31:13,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896470123] [2021-11-03 04:31:13,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:13,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:31:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:14,129 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:31:14,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896470123] [2021-11-03 04:31:14,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896470123] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:14,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:14,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:31:14,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760386226] [2021-11-03 04:31:14,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:31:14,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:31:14,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:31:14,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:31:14,155 INFO L87 Difference]: Start difference. First operand has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 20 states have internal predecessors, (29), 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 1.5) internal successors, (6), 3 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) [2021-11-03 04:31:14,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:14,859 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-11-03 04:31:14,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:31:14,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 04:31:14,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:14,879 INFO L225 Difference]: With dead ends: 47 [2021-11-03 04:31:14,879 INFO L226 Difference]: Without dead ends: 22 [2021-11-03 04:31:14,883 INFO L786 BasicCegarLoop]: 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 [2021-11-03 04:31:14,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-03 04:31:14,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-11-03 04:31:14,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-03 04:31:14,914 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 6 [2021-11-03 04:31:14,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:14,915 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-03 04:31:14,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 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) [2021-11-03 04:31:14,915 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-03 04:31:14,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-03 04:31:14,916 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:14,916 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:31:14,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:31:14,917 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:31:14,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:14,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1111467287, now seen corresponding path program 1 times [2021-11-03 04:31:14,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:31:14,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779637665] [2021-11-03 04:31:14,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:14,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:31:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:15,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:15,367 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:31:15,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779637665] [2021-11-03 04:31:15,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779637665] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:15,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:15,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:31:15,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200951154] [2021-11-03 04:31:15,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:31:15,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:31:15,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:31:15,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:31:15,371 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:15,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:15,473 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-11-03 04:31:15,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:31:15,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-03 04:31:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:15,476 INFO L225 Difference]: With dead ends: 42 [2021-11-03 04:31:15,476 INFO L226 Difference]: Without dead ends: 32 [2021-11-03 04:31:15,477 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:31:15,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-03 04:31:15,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-11-03 04:31:15,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:15,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-03 04:31:15,499 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 7 [2021-11-03 04:31:15,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:15,500 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-03 04:31:15,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:15,500 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-03 04:31:15,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-03 04:31:15,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:15,502 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:31:15,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 04:31:15,503 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:31:15,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:15,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1347301320, now seen corresponding path program 1 times [2021-11-03 04:31:15,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:31:15,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139839024] [2021-11-03 04:31:15,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:15,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:31:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:15,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:15,768 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:31:15,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139839024] [2021-11-03 04:31:15,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139839024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:15,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:15,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:31:15,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932192047] [2021-11-03 04:31:15,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:31:15,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:31:15,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:31:15,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:31:15,770 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2021-11-03 04:31:15,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:15,865 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-11-03 04:31:15,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:31:15,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-03 04:31:15,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:15,866 INFO L225 Difference]: With dead ends: 42 [2021-11-03 04:31:15,866 INFO L226 Difference]: Without dead ends: 32 [2021-11-03 04:31:15,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:31:15,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-03 04:31:15,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2021-11-03 04:31:15,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:15,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-03 04:31:15,873 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2021-11-03 04:31:15,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:15,874 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-03 04:31:15,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2021-11-03 04:31:15,874 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-03 04:31:15,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-03 04:31:15,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:15,875 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:31:15,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 04:31:15,875 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:31:15,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:15,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1467627169, now seen corresponding path program 1 times [2021-11-03 04:31:15,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:31:15,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158786405] [2021-11-03 04:31:15,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:15,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:31:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:16,271 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:31:16,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158786405] [2021-11-03 04:31:16,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158786405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:16,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:16,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:31:16,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196664758] [2021-11-03 04:31:16,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:31:16,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:31:16,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:31:16,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:31:16,274 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2021-11-03 04:31:16,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:16,375 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2021-11-03 04:31:16,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:31:16,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-03 04:31:16,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:16,380 INFO L225 Difference]: With dead ends: 42 [2021-11-03 04:31:16,380 INFO L226 Difference]: Without dead ends: 32 [2021-11-03 04:31:16,380 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:31:16,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-03 04:31:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2021-11-03 04:31:16,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:16,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-11-03 04:31:16,386 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 9 [2021-11-03 04:31:16,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:16,386 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-11-03 04:31:16,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2021-11-03 04:31:16,387 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-11-03 04:31:16,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:31:16,399 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:16,400 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-03 04:31:16,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 04:31:16,404 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:31:16,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:16,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1451080745, now seen corresponding path program 1 times [2021-11-03 04:31:16,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:31:16,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33143696] [2021-11-03 04:31:16,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:16,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:31:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:25,876 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:31:25,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33143696] [2021-11-03 04:31:25,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33143696] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:31:25,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017744251] [2021-11-03 04:31:25,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:25,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:31:25,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c25f59c5-41ab-4396-8050-1c805e087f6c/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:31:25,907 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c25f59c5-41ab-4396-8050-1c805e087f6c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:31:25,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c25f59c5-41ab-4396-8050-1c805e087f6c/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 04:31:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:26,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-03 04:31:26,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:39,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:39,940 INFO L328 TraceCheckSpWp]: Computing backward predicates...