./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd66f72c-0fd9-41ef-9f23-d824c5ebc7bd/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd66f72c-0fd9-41ef-9f23-d824c5ebc7bd/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd66f72c-0fd9-41ef-9f23-d824c5ebc7bd/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd66f72c-0fd9-41ef-9f23-d824c5ebc7bd/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd66f72c-0fd9-41ef-9f23-d824c5ebc7bd/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd66f72c-0fd9-41ef-9f23-d824c5ebc7bd/bin/utaipan-UbGMyvGFUs --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 160554c42c564a52ebd5fe8cd6d07ff66d908df6432eaaa8c30073c4760a7967 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:03:48,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:03:48,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:03:48,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:03:48,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:03:48,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:03:48,127 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:03:48,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:03:48,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:03:48,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:03:48,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:03:48,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:03:48,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:03:48,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:03:48,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:03:48,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:03:48,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:03:48,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:03:48,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:03:48,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:03:48,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:03:48,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:03:48,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:03:48,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:03:48,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:03:48,174 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:03:48,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:03:48,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:03:48,176 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:03:48,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:03:48,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:03:48,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:03:48,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:03:48,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:03:48,187 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:03:48,187 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:03:48,188 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:03:48,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:03:48,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:03:48,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:03:48,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:03:48,192 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd66f72c-0fd9-41ef-9f23-d824c5ebc7bd/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:03:48,235 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:03:48,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:03:48,236 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:03:48,237 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:03:48,237 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:03:48,237 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:03:48,238 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:03:48,238 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:03:48,244 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:03:48,244 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:03:48,245 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:03:48,246 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:03:48,246 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:03:48,246 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:03:48,247 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:03:48,247 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:03:48,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:03:48,248 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:03:48,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:03:48,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:03:48,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:03:48,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:03:48,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:03:48,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:03:48,249 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:03:48,250 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:03:48,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:03:48,250 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:03:48,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:03:48,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:03:48,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:03:48,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:03:48,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:03:48,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:03:48,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:03:48,253 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:03:48,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:03:48,254 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:03:48,254 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:03:48,254 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:03:48,255 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_cd66f72c-0fd9-41ef-9f23-d824c5ebc7bd/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd66f72c-0fd9-41ef-9f23-d824c5ebc7bd/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 160554c42c564a52ebd5fe8cd6d07ff66d908df6432eaaa8c30073c4760a7967 [2021-11-19 14:03:48,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:03:48,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:03:48,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:03:48,630 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:03:48,630 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:03:48,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd66f72c-0fd9-41ef-9f23-d824c5ebc7bd/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-19 14:03:48,722 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd66f72c-0fd9-41ef-9f23-d824c5ebc7bd/bin/utaipan-UbGMyvGFUs/data/f11f93abc/4603fa52e3b34bc3931a37255999560c/FLAGa7472078e [2021-11-19 14:03:49,291 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:03:49,292 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd66f72c-0fd9-41ef-9f23-d824c5ebc7bd/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-19 14:03:49,307 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd66f72c-0fd9-41ef-9f23-d824c5ebc7bd/bin/utaipan-UbGMyvGFUs/data/f11f93abc/4603fa52e3b34bc3931a37255999560c/FLAGa7472078e [2021-11-19 14:03:49,609 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd66f72c-0fd9-41ef-9f23-d824c5ebc7bd/bin/utaipan-UbGMyvGFUs/data/f11f93abc/4603fa52e3b34bc3931a37255999560c [2021-11-19 14:03:49,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:03:49,614 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:03:49,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:03:49,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:03:49,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:03:49,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:03:49" (1/1) ... [2021-11-19 14:03:49,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a60998d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:49, skipping insertion in model container [2021-11-19 14:03:49,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:03:49" (1/1) ... [2021-11-19 14:03:49,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:03:49,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:03:49,997 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd66f72c-0fd9-41ef-9f23-d824c5ebc7bd/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[4902,4915] [2021-11-19 14:03:50,032 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:03:50,049 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:03:50,101 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd66f72c-0fd9-41ef-9f23-d824c5ebc7bd/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[4902,4915] [2021-11-19 14:03:50,135 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:03:50,161 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:03:50,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:50 WrapperNode [2021-11-19 14:03:50,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:03:50,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:03:50,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:03:50,167 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:03:50,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:50" (1/1) ... [2021-11-19 14:03:50,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:50" (1/1) ... [2021-11-19 14:03:50,247 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 343 [2021-11-19 14:03:50,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:03:50,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:03:50,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:03:50,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:03:50,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:50" (1/1) ... [2021-11-19 14:03:50,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:50" (1/1) ... [2021-11-19 14:03:50,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:50" (1/1) ... [2021-11-19 14:03:50,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:50" (1/1) ... [2021-11-19 14:03:50,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:50" (1/1) ... [2021-11-19 14:03:50,285 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:50" (1/1) ... [2021-11-19 14:03:50,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:50" (1/1) ... [2021-11-19 14:03:50,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:03:50,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:03:50,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:03:50,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:03:50,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:50" (1/1) ... [2021-11-19 14:03:50,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:03:50,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd66f72c-0fd9-41ef-9f23-d824c5ebc7bd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:03:50,347 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd66f72c-0fd9-41ef-9f23-d824c5ebc7bd/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:03:50,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd66f72c-0fd9-41ef-9f23-d824c5ebc7bd/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:03:50,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:03:50,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:03:50,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:03:50,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:03:50,522 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:03:50,524 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:03:50,993 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:03:51,131 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:03:51,131 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 14:03:51,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:03:51 BoogieIcfgContainer [2021-11-19 14:03:51,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:03:51,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:03:51,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:03:51,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:03:51,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:03:49" (1/3) ... [2021-11-19 14:03:51,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d513b15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:03:51, skipping insertion in model container [2021-11-19 14:03:51,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:03:50" (2/3) ... [2021-11-19 14:03:51,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d513b15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:03:51, skipping insertion in model container [2021-11-19 14:03:51,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:03:51" (3/3) ... [2021-11-19 14:03:51,148 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-19 14:03:51,156 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:03:51,156 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:03:51,216 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:03:51,225 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 [2021-11-19 14:03:51,225 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:03:51,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 58 states have (on average 1.7241379310344827) internal successors, (100), 59 states have internal predecessors, (100), 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) [2021-11-19 14:03:51,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-19 14:03:51,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:51,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:51,256 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:51,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:51,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1366550172, now seen corresponding path program 1 times [2021-11-19 14:03:51,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:03:51,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218478270] [2021-11-19 14:03:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:51,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:03:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:51,747 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:03:51,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218478270] [2021-11-19 14:03:51,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218478270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:51,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:51,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:03:51,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440974220] [2021-11-19 14:03:51,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:51,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:03:51,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:03:51,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:03:51,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:03:51,800 INFO L87 Difference]: Start difference. First operand has 60 states, 58 states have (on average 1.7241379310344827) internal successors, (100), 59 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2021-11-19 14:03:51,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:51,928 INFO L93 Difference]: Finished difference Result 126 states and 196 transitions. [2021-11-19 14:03:51,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:03:51,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 38 [2021-11-19 14:03:51,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:51,944 INFO L225 Difference]: With dead ends: 126 [2021-11-19 14:03:51,944 INFO L226 Difference]: Without dead ends: 87 [2021-11-19 14:03:51,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:03:51,953 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 66 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:51,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 171 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:03:51,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-19 14:03:51,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2021-11-19 14:03:51,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.3452380952380953) internal successors, (113), 84 states have internal predecessors, (113), 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) [2021-11-19 14:03:51,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 113 transitions. [2021-11-19 14:03:51,997 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 113 transitions. Word has length 38 [2021-11-19 14:03:51,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:51,998 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 113 transitions. [2021-11-19 14:03:51,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2021-11-19 14:03:51,999 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 113 transitions. [2021-11-19 14:03:52,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-19 14:03:52,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:52,001 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:52,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:03:52,002 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:52,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:52,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1345882917, now seen corresponding path program 1 times [2021-11-19 14:03:52,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:03:52,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308468408] [2021-11-19 14:03:52,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:52,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:03:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:52,097 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:03:52,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308468408] [2021-11-19 14:03:52,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308468408] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:52,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:52,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:03:52,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840430249] [2021-11-19 14:03:52,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:52,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:03:52,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:03:52,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:03:52,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:03:52,102 INFO L87 Difference]: Start difference. First operand 85 states and 113 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2021-11-19 14:03:52,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:52,161 INFO L93 Difference]: Finished difference Result 197 states and 277 transitions. [2021-11-19 14:03:52,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:03:52,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 41 [2021-11-19 14:03:52,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:52,164 INFO L225 Difference]: With dead ends: 197 [2021-11-19 14:03:52,165 INFO L226 Difference]: Without dead ends: 137 [2021-11-19 14:03:52,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:03:52,168 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 40 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:52,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 137 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:03:52,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-19 14:03:52,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2021-11-19 14:03:52,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.3880597014925373) internal successors, (186), 134 states have internal predecessors, (186), 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) [2021-11-19 14:03:52,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 186 transitions. [2021-11-19 14:03:52,196 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 186 transitions. Word has length 41 [2021-11-19 14:03:52,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:52,197 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 186 transitions. [2021-11-19 14:03:52,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2021-11-19 14:03:52,197 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 186 transitions. [2021-11-19 14:03:52,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-19 14:03:52,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:52,199 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:52,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 14:03:52,200 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:52,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:52,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1412731696, now seen corresponding path program 1 times [2021-11-19 14:03:52,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:03:52,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988547206] [2021-11-19 14:03:52,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:52,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:03:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:52,317 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:03:52,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988547206] [2021-11-19 14:03:52,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988547206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:52,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:52,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:03:52,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998060586] [2021-11-19 14:03:52,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:52,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:03:52,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:03:52,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:03:52,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:03:52,321 INFO L87 Difference]: Start difference. First operand 135 states and 186 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2021-11-19 14:03:52,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:52,416 INFO L93 Difference]: Finished difference Result 339 states and 484 transitions. [2021-11-19 14:03:52,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:03:52,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 44 [2021-11-19 14:03:52,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:52,421 INFO L225 Difference]: With dead ends: 339 [2021-11-19 14:03:52,424 INFO L226 Difference]: Without dead ends: 229 [2021-11-19 14:03:52,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:03:52,427 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 35 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:52,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 133 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:03:52,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-19 14:03:52,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2021-11-19 14:03:52,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.407079646017699) internal successors, (318), 226 states have internal predecessors, (318), 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) [2021-11-19 14:03:52,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 318 transitions. [2021-11-19 14:03:52,489 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 318 transitions. Word has length 44 [2021-11-19 14:03:52,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:52,490 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 318 transitions. [2021-11-19 14:03:52,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2021-11-19 14:03:52,492 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 318 transitions. [2021-11-19 14:03:52,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 14:03:52,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:52,495 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:52,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 14:03:52,496 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:52,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:52,497 INFO L85 PathProgramCache]: Analyzing trace with hash -2077931098, now seen corresponding path program 1 times [2021-11-19 14:03:52,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:03:52,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509301462] [2021-11-19 14:03:52,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:52,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:03:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:52,610 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:03:52,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509301462] [2021-11-19 14:03:52,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509301462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:52,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:52,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:03:52,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069530721] [2021-11-19 14:03:52,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:52,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:03:52,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:03:52,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:03:52,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:03:52,620 INFO L87 Difference]: Start difference. First operand 227 states and 318 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2021-11-19 14:03:52,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:52,738 INFO L93 Difference]: Finished difference Result 599 states and 856 transitions. [2021-11-19 14:03:52,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:03:52,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 47 [2021-11-19 14:03:52,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:52,743 INFO L225 Difference]: With dead ends: 599 [2021-11-19 14:03:52,744 INFO L226 Difference]: Without dead ends: 397 [2021-11-19 14:03:52,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:03:52,758 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 30 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:52,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 129 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:03:52,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-11-19 14:03:52,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 395. [2021-11-19 14:03:52,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.4060913705583757) internal successors, (554), 394 states have internal predecessors, (554), 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) [2021-11-19 14:03:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 554 transitions. [2021-11-19 14:03:52,817 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 554 transitions. Word has length 47 [2021-11-19 14:03:52,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:52,818 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 554 transitions. [2021-11-19 14:03:52,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2021-11-19 14:03:52,819 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 554 transitions. [2021-11-19 14:03:52,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 14:03:52,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:52,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:52,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 14:03:52,827 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:52,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:52,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1318268341, now seen corresponding path program 1 times [2021-11-19 14:03:52,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:03:52,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002529940] [2021-11-19 14:03:52,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:52,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:03:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:52,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:52,966 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:03:52,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002529940] [2021-11-19 14:03:52,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002529940] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:52,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:52,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 14:03:52,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067818751] [2021-11-19 14:03:52,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:52,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:03:52,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:03:52,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:03:52,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:03:52,973 INFO L87 Difference]: Start difference. First operand 395 states and 554 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 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) [2021-11-19 14:03:53,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:53,287 INFO L93 Difference]: Finished difference Result 1605 states and 2279 transitions. [2021-11-19 14:03:53,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:03:53,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 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 50 [2021-11-19 14:03:53,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:53,296 INFO L225 Difference]: With dead ends: 1605 [2021-11-19 14:03:53,296 INFO L226 Difference]: Without dead ends: 1235 [2021-11-19 14:03:53,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:03:53,301 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 352 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:53,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 714 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:03:53,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-11-19 14:03:53,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 567. [2021-11-19 14:03:53,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 1.3939929328621907) internal successors, (789), 566 states have internal predecessors, (789), 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) [2021-11-19 14:03:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 789 transitions. [2021-11-19 14:03:53,389 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 789 transitions. Word has length 50 [2021-11-19 14:03:53,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:53,391 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 789 transitions. [2021-11-19 14:03:53,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 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) [2021-11-19 14:03:53,392 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 789 transitions. [2021-11-19 14:03:53,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 14:03:53,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:53,400 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:53,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 14:03:53,401 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:53,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:53,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1075310744, now seen corresponding path program 1 times [2021-11-19 14:03:53,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:03:53,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883088852] [2021-11-19 14:03:53,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:53,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:03:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:53,500 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:03:53,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883088852] [2021-11-19 14:03:53,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883088852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:53,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:53,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:03:53,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338737941] [2021-11-19 14:03:53,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:53,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:03:53,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:03:53,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:03:53,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:03:53,504 INFO L87 Difference]: Start difference. First operand 567 states and 789 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-19 14:03:53,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:53,617 INFO L93 Difference]: Finished difference Result 1437 states and 2027 transitions. [2021-11-19 14:03:53,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:03:53,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-11-19 14:03:53,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:53,623 INFO L225 Difference]: With dead ends: 1437 [2021-11-19 14:03:53,624 INFO L226 Difference]: Without dead ends: 895 [2021-11-19 14:03:53,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:03:53,626 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 24 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:53,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 108 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:03:53,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-11-19 14:03:53,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 893. [2021-11-19 14:03:53,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.404708520179372) internal successors, (1253), 892 states have internal predecessors, (1253), 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) [2021-11-19 14:03:53,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1253 transitions. [2021-11-19 14:03:53,737 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1253 transitions. Word has length 52 [2021-11-19 14:03:53,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:53,737 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 1253 transitions. [2021-11-19 14:03:53,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2021-11-19 14:03:53,739 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1253 transitions. [2021-11-19 14:03:53,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 14:03:53,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:53,741 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:53,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 14:03:53,742 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:53,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:53,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1060296080, now seen corresponding path program 1 times [2021-11-19 14:03:53,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:03:53,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873081014] [2021-11-19 14:03:53,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:53,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:03:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:53,907 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:03:53,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873081014] [2021-11-19 14:03:53,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873081014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:53,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:53,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 14:03:53,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134352452] [2021-11-19 14:03:53,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:53,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:03:53,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:03:53,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:03:53,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:03:53,910 INFO L87 Difference]: Start difference. First operand 893 states and 1253 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2021-11-19 14:03:54,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:54,111 INFO L93 Difference]: Finished difference Result 1761 states and 2480 transitions. [2021-11-19 14:03:54,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:03:54,112 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 52 [2021-11-19 14:03:54,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:54,118 INFO L225 Difference]: With dead ends: 1761 [2021-11-19 14:03:54,118 INFO L226 Difference]: Without dead ends: 895 [2021-11-19 14:03:54,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:03:54,120 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 168 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:54,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 198 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:03:54,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-11-19 14:03:54,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 893. [2021-11-19 14:03:54,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.4024663677130045) internal successors, (1251), 892 states have internal predecessors, (1251), 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) [2021-11-19 14:03:54,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1251 transitions. [2021-11-19 14:03:54,226 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1251 transitions. Word has length 52 [2021-11-19 14:03:54,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:54,227 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 1251 transitions. [2021-11-19 14:03:54,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2021-11-19 14:03:54,227 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1251 transitions. [2021-11-19 14:03:54,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 14:03:54,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:54,228 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:54,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 14:03:54,229 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:54,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:54,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1494638487, now seen corresponding path program 1 times [2021-11-19 14:03:54,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:03:54,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748625175] [2021-11-19 14:03:54,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:54,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:03:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:54,295 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:03:54,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748625175] [2021-11-19 14:03:54,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748625175] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:54,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:54,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:03:54,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650259984] [2021-11-19 14:03:54,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:54,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:03:54,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:03:54,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:03:54,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:03:54,297 INFO L87 Difference]: Start difference. First operand 893 states and 1251 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-11-19 14:03:54,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:54,482 INFO L93 Difference]: Finished difference Result 1759 states and 2475 transitions. [2021-11-19 14:03:54,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:03:54,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 53 [2021-11-19 14:03:54,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:54,488 INFO L225 Difference]: With dead ends: 1759 [2021-11-19 14:03:54,489 INFO L226 Difference]: Without dead ends: 893 [2021-11-19 14:03:54,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:03:54,491 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 154 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:54,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 61 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:03:54,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-11-19 14:03:54,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 893. [2021-11-19 14:03:54,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.3845291479820627) internal successors, (1235), 892 states have internal predecessors, (1235), 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) [2021-11-19 14:03:54,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1235 transitions. [2021-11-19 14:03:54,611 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1235 transitions. Word has length 53 [2021-11-19 14:03:54,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:54,612 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 1235 transitions. [2021-11-19 14:03:54,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-11-19 14:03:54,612 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1235 transitions. [2021-11-19 14:03:54,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 14:03:54,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:54,613 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:54,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 14:03:54,614 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:54,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:54,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1934796420, now seen corresponding path program 1 times [2021-11-19 14:03:54,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:03:54,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019978760] [2021-11-19 14:03:54,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:54,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:03:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:54,661 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:03:54,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019978760] [2021-11-19 14:03:54,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019978760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:54,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:54,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:03:54,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996131005] [2021-11-19 14:03:54,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:54,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:03:54,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:03:54,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:03:54,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:03:54,664 INFO L87 Difference]: Start difference. First operand 893 states and 1235 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-11-19 14:03:54,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:54,856 INFO L93 Difference]: Finished difference Result 1761 states and 2444 transitions. [2021-11-19 14:03:54,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:03:54,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 53 [2021-11-19 14:03:54,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:54,862 INFO L225 Difference]: With dead ends: 1761 [2021-11-19 14:03:54,863 INFO L226 Difference]: Without dead ends: 895 [2021-11-19 14:03:54,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:03:54,865 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 258 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:54,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 69 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:03:54,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-11-19 14:03:54,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 893. [2021-11-19 14:03:54,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.366591928251121) internal successors, (1219), 892 states have internal predecessors, (1219), 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) [2021-11-19 14:03:54,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1219 transitions. [2021-11-19 14:03:54,986 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1219 transitions. Word has length 53 [2021-11-19 14:03:54,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:54,986 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 1219 transitions. [2021-11-19 14:03:54,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-11-19 14:03:54,986 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1219 transitions. [2021-11-19 14:03:54,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 14:03:54,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:54,987 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:54,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 14:03:54,987 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:54,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:54,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1597307169, now seen corresponding path program 1 times [2021-11-19 14:03:54,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:03:54,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733105572] [2021-11-19 14:03:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:54,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:03:55,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:55,055 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:03:55,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733105572] [2021-11-19 14:03:55,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733105572] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:55,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:55,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:03:55,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658223504] [2021-11-19 14:03:55,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:55,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:03:55,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:03:55,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:03:55,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:03:55,058 INFO L87 Difference]: Start difference. First operand 893 states and 1219 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-11-19 14:03:55,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:55,223 INFO L93 Difference]: Finished difference Result 1759 states and 2411 transitions. [2021-11-19 14:03:55,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:03:55,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 53 [2021-11-19 14:03:55,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:55,229 INFO L225 Difference]: With dead ends: 1759 [2021-11-19 14:03:55,229 INFO L226 Difference]: Without dead ends: 893 [2021-11-19 14:03:55,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:03:55,232 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 164 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:55,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 53 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:03:55,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-11-19 14:03:55,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 893. [2021-11-19 14:03:55,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.344170403587444) internal successors, (1199), 892 states have internal predecessors, (1199), 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) [2021-11-19 14:03:55,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1199 transitions. [2021-11-19 14:03:55,373 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1199 transitions. Word has length 53 [2021-11-19 14:03:55,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:55,374 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 1199 transitions. [2021-11-19 14:03:55,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-11-19 14:03:55,374 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1199 transitions. [2021-11-19 14:03:55,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 14:03:55,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:55,375 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:55,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 14:03:55,375 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:55,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:55,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1725392476, now seen corresponding path program 1 times [2021-11-19 14:03:55,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:03:55,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28350170] [2021-11-19 14:03:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:55,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:03:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:55,489 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:03:55,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28350170] [2021-11-19 14:03:55,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28350170] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:55,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:55,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 14:03:55,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219693108] [2021-11-19 14:03:55,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:55,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:03:55,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:03:55,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:03:55,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:03:55,491 INFO L87 Difference]: Start difference. First operand 893 states and 1199 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2021-11-19 14:03:55,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:55,749 INFO L93 Difference]: Finished difference Result 1174 states and 1562 transitions. [2021-11-19 14:03:55,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:03:55,750 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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 53 [2021-11-19 14:03:55,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:55,757 INFO L225 Difference]: With dead ends: 1174 [2021-11-19 14:03:55,757 INFO L226 Difference]: Without dead ends: 1172 [2021-11-19 14:03:55,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:03:55,762 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 103 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:55,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 382 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:03:55,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-11-19 14:03:55,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 893. [2021-11-19 14:03:55,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.3352017937219731) internal successors, (1191), 892 states have internal predecessors, (1191), 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) [2021-11-19 14:03:55,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1191 transitions. [2021-11-19 14:03:55,907 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1191 transitions. Word has length 53 [2021-11-19 14:03:55,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:55,907 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 1191 transitions. [2021-11-19 14:03:55,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2021-11-19 14:03:55,908 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1191 transitions. [2021-11-19 14:03:55,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 14:03:55,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:55,909 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:55,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 14:03:55,909 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:55,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:55,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1473759324, now seen corresponding path program 1 times [2021-11-19 14:03:55,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:03:55,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819868709] [2021-11-19 14:03:55,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:55,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:03:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:04:00,374 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:04:00,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819868709] [2021-11-19 14:04:00,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819868709] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:04:00,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466300726] [2021-11-19 14:04:00,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:00,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:04:00,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd66f72c-0fd9-41ef-9f23-d824c5ebc7bd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:04:00,377 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd66f72c-0fd9-41ef-9f23-d824c5ebc7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:04:00,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd66f72c-0fd9-41ef-9f23-d824c5ebc7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 14:04:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:00,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-19 14:04:00,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:05:23,583 INFO L328 TraceCheckSpWp]: Computing backward predicates...