./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8803fd3-540b-4570-b1b5-76b6a121c186/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8803fd3-540b-4570-b1b5-76b6a121c186/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8803fd3-540b-4570-b1b5-76b6a121c186/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8803fd3-540b-4570-b1b5-76b6a121c186/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8803fd3-540b-4570-b1b5-76b6a121c186/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8803fd3-540b-4570-b1b5-76b6a121c186/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d9dc4c1afb888b23c0ebc469c8090d62842d0a0c5570d5e56681453b5bd49afb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:03:27,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:03:27,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:03:27,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:03:27,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:03:27,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:03:27,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:03:27,506 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:03:27,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:03:27,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:03:27,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:03:27,517 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:03:27,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:03:27,519 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:03:27,521 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:03:27,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:03:27,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:03:27,530 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:03:27,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:03:27,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:03:27,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:03:27,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:03:27,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:03:27,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:03:27,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:03:27,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:03:27,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:03:27,557 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:03:27,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:03:27,560 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:03:27,560 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:03:27,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:03:27,563 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:03:27,564 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:03:27,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:03:27,566 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:03:27,567 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:03:27,567 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:03:27,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:03:27,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:03:27,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:03:27,570 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8803fd3-540b-4570-b1b5-76b6a121c186/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:03:27,616 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:03:27,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:03:27,618 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:03:27,619 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:03:27,619 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:03:27,619 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:03:27,620 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:03:27,620 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:03:27,620 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:03:27,620 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:03:27,621 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:03:27,622 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:03:27,622 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:03:27,622 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:03:27,623 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:03:27,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:03:27,624 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:03:27,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:03:27,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:03:27,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:03:27,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:03:27,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:03:27,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:03:27,625 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:03:27,626 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:03:27,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:03:27,626 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:03:27,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:03:27,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:03:27,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:03:27,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:03:27,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:03:27,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:03:27,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:03:27,630 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:03:27,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:03:27,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:03:27,630 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:03:27,631 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:03:27,631 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_d8803fd3-540b-4570-b1b5-76b6a121c186/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8803fd3-540b-4570-b1b5-76b6a121c186/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9dc4c1afb888b23c0ebc469c8090d62842d0a0c5570d5e56681453b5bd49afb [2021-11-03 05:03:27,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:03:27,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:03:27,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:03:27,975 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:03:27,976 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:03:27,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8803fd3-540b-4570-b1b5-76b6a121c186/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2021-11-03 05:03:28,071 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8803fd3-540b-4570-b1b5-76b6a121c186/bin/utaipan-aC7eJsxGYH/data/e1926ea87/2529acec9e44442d90836e6bc22bdecc/FLAG439c27a9c [2021-11-03 05:03:28,697 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:03:28,698 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8803fd3-540b-4570-b1b5-76b6a121c186/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2021-11-03 05:03:28,715 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8803fd3-540b-4570-b1b5-76b6a121c186/bin/utaipan-aC7eJsxGYH/data/e1926ea87/2529acec9e44442d90836e6bc22bdecc/FLAG439c27a9c [2021-11-03 05:03:28,966 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8803fd3-540b-4570-b1b5-76b6a121c186/bin/utaipan-aC7eJsxGYH/data/e1926ea87/2529acec9e44442d90836e6bc22bdecc [2021-11-03 05:03:28,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:03:28,970 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:03:28,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:03:28,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:03:28,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:03:28,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:03:28" (1/1) ... [2021-11-03 05:03:28,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23f9e749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:28, skipping insertion in model container [2021-11-03 05:03:28,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:03:28" (1/1) ... [2021-11-03 05:03:28,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:03:29,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:03:29,409 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8803fd3-540b-4570-b1b5-76b6a121c186/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c[15364,15377] [2021-11-03 05:03:29,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:03:29,569 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:03:29,806 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8803fd3-540b-4570-b1b5-76b6a121c186/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c[15364,15377] [2021-11-03 05:03:29,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:03:29,997 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:03:29,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:29 WrapperNode [2021-11-03 05:03:29,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:03:29,999 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:03:29,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:03:29,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:03:30,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:29" (1/1) ... [2021-11-03 05:03:30,055 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:29" (1/1) ... [2021-11-03 05:03:30,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:03:30,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:03:30,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:03:30,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:03:30,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:29" (1/1) ... [2021-11-03 05:03:30,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:29" (1/1) ... [2021-11-03 05:03:30,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:29" (1/1) ... [2021-11-03 05:03:30,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:29" (1/1) ... [2021-11-03 05:03:30,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:29" (1/1) ... [2021-11-03 05:03:30,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:29" (1/1) ... [2021-11-03 05:03:30,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:29" (1/1) ... [2021-11-03 05:03:30,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:03:30,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:03:30,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:03:30,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:03:30,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:29" (1/1) ... [2021-11-03 05:03:30,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:03:30,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8803fd3-540b-4570-b1b5-76b6a121c186/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:03:30,290 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8803fd3-540b-4570-b1b5-76b6a121c186/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:03:30,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8803fd3-540b-4570-b1b5-76b6a121c186/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:03:30,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:03:30,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:03:30,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:03:30,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:03:34,033 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:03:34,034 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-03 05:03:34,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:03:34 BoogieIcfgContainer [2021-11-03 05:03:34,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:03:34,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:03:34,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:03:34,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:03:34,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:03:28" (1/3) ... [2021-11-03 05:03:34,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61a2c158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:03:34, skipping insertion in model container [2021-11-03 05:03:34,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:03:29" (2/3) ... [2021-11-03 05:03:34,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61a2c158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:03:34, skipping insertion in model container [2021-11-03 05:03:34,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:03:34" (3/3) ... [2021-11-03 05:03:34,050 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2021-11-03 05:03:34,057 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:03:34,057 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:03:34,118 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:03:34,125 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 05:03:34,126 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:03:34,157 INFO L276 IsEmpty]: Start isEmpty. Operand has 307 states, 305 states have (on average 1.544262295081967) internal successors, (471), 306 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:34,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:03:34,179 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:34,179 INFO L513 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:03:34,181 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:03:34,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:34,187 INFO L85 PathProgramCache]: Analyzing trace with hash 44850494, now seen corresponding path program 1 times [2021-11-03 05:03:34,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:03:34,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317753157] [2021-11-03 05:03:34,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:34,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:03:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:34,700 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:03:34,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317753157] [2021-11-03 05:03:34,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317753157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:34,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:34,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:03:34,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759462720] [2021-11-03 05:03:34,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:03:34,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:03:34,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:03:34,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:34,723 INFO L87 Difference]: Start difference. First operand has 307 states, 305 states have (on average 1.544262295081967) internal successors, (471), 306 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:34,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:34,998 INFO L93 Difference]: Finished difference Result 816 states and 1248 transitions. [2021-11-03 05:03:34,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:03:35,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 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 60 [2021-11-03 05:03:35,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:35,017 INFO L225 Difference]: With dead ends: 816 [2021-11-03 05:03:35,017 INFO L226 Difference]: Without dead ends: 513 [2021-11-03 05:03:35,022 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:35,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-11-03 05:03:35,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 511. [2021-11-03 05:03:35,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.5137254901960784) internal successors, (772), 510 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:35,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 772 transitions. [2021-11-03 05:03:35,115 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 772 transitions. Word has length 60 [2021-11-03 05:03:35,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:35,115 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 772 transitions. [2021-11-03 05:03:35,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:35,116 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 772 transitions. [2021-11-03 05:03:35,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 05:03:35,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:35,120 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:03:35,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:03:35,121 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:03:35,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:35,122 INFO L85 PathProgramCache]: Analyzing trace with hash 538961238, now seen corresponding path program 1 times [2021-11-03 05:03:35,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:03:35,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856571106] [2021-11-03 05:03:35,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:35,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:03:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:35,271 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:03:35,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856571106] [2021-11-03 05:03:35,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856571106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:35,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:35,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:03:35,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442203177] [2021-11-03 05:03:35,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:03:35,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:03:35,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:03:35,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:35,276 INFO L87 Difference]: Start difference. First operand 511 states and 772 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:35,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:35,435 INFO L93 Difference]: Finished difference Result 1355 states and 2048 transitions. [2021-11-03 05:03:35,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:03:35,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-03 05:03:35,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:35,445 INFO L225 Difference]: With dead ends: 1355 [2021-11-03 05:03:35,445 INFO L226 Difference]: Without dead ends: 867 [2021-11-03 05:03:35,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:35,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2021-11-03 05:03:35,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 865. [2021-11-03 05:03:35,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 1.5081018518518519) internal successors, (1303), 864 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:35,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1303 transitions. [2021-11-03 05:03:35,541 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1303 transitions. Word has length 64 [2021-11-03 05:03:35,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:35,541 INFO L470 AbstractCegarLoop]: Abstraction has 865 states and 1303 transitions. [2021-11-03 05:03:35,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:35,542 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1303 transitions. [2021-11-03 05:03:35,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 05:03:35,547 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:35,548 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:03:35,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 05:03:35,548 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:03:35,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:35,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1086112913, now seen corresponding path program 1 times [2021-11-03 05:03:35,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:03:35,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101505791] [2021-11-03 05:03:35,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:35,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:03:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:35,723 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:03:35,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101505791] [2021-11-03 05:03:35,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101505791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:35,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:35,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:03:35,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024940405] [2021-11-03 05:03:35,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:03:35,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:03:35,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:03:35,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:35,734 INFO L87 Difference]: Start difference. First operand 865 states and 1303 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:35,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:35,869 INFO L93 Difference]: Finished difference Result 2308 states and 3475 transitions. [2021-11-03 05:03:35,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:03:35,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 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 70 [2021-11-03 05:03:35,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:35,881 INFO L225 Difference]: With dead ends: 2308 [2021-11-03 05:03:35,881 INFO L226 Difference]: Without dead ends: 1479 [2021-11-03 05:03:35,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:35,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2021-11-03 05:03:36,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1477. [2021-11-03 05:03:36,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 1.5) internal successors, (2214), 1476 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:36,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 2214 transitions. [2021-11-03 05:03:36,024 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 2214 transitions. Word has length 70 [2021-11-03 05:03:36,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:36,024 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 2214 transitions. [2021-11-03 05:03:36,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:36,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 2214 transitions. [2021-11-03 05:03:36,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-03 05:03:36,031 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:36,031 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:03:36,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 05:03:36,032 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:03:36,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:36,033 INFO L85 PathProgramCache]: Analyzing trace with hash 163452826, now seen corresponding path program 1 times [2021-11-03 05:03:36,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:03:36,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807510351] [2021-11-03 05:03:36,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:36,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:03:36,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:36,201 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:03:36,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807510351] [2021-11-03 05:03:36,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807510351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:36,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:36,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:03:36,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137398796] [2021-11-03 05:03:36,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:03:36,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:03:36,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:03:36,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:36,210 INFO L87 Difference]: Start difference. First operand 1477 states and 2214 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:36,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:36,419 INFO L93 Difference]: Finished difference Result 3939 states and 5894 transitions. [2021-11-03 05:03:36,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:03:36,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 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 76 [2021-11-03 05:03:36,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:36,435 INFO L225 Difference]: With dead ends: 3939 [2021-11-03 05:03:36,435 INFO L226 Difference]: Without dead ends: 2511 [2021-11-03 05:03:36,438 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:36,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-11-03 05:03:36,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2509. [2021-11-03 05:03:36,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 2508 states have (on average 1.4884370015948962) internal successors, (3733), 2508 states have internal predecessors, (3733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:36,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3733 transitions. [2021-11-03 05:03:36,622 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3733 transitions. Word has length 76 [2021-11-03 05:03:36,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:36,623 INFO L470 AbstractCegarLoop]: Abstraction has 2509 states and 3733 transitions. [2021-11-03 05:03:36,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:36,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3733 transitions. [2021-11-03 05:03:36,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 05:03:36,629 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:36,629 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:03:36,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 05:03:36,630 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:03:36,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:36,631 INFO L85 PathProgramCache]: Analyzing trace with hash -83572149, now seen corresponding path program 1 times [2021-11-03 05:03:36,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:03:36,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036935569] [2021-11-03 05:03:36,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:36,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:03:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:36,703 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:03:36,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036935569] [2021-11-03 05:03:36,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036935569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:36,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:36,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:03:36,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973958966] [2021-11-03 05:03:36,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:03:36,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:03:36,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:03:36,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:36,706 INFO L87 Difference]: Start difference. First operand 2509 states and 3733 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:37,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:37,008 INFO L93 Difference]: Finished difference Result 6638 states and 9841 transitions. [2021-11-03 05:03:37,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:03:37,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 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 82 [2021-11-03 05:03:37,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:37,034 INFO L225 Difference]: With dead ends: 6638 [2021-11-03 05:03:37,034 INFO L226 Difference]: Without dead ends: 4191 [2021-11-03 05:03:37,038 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:37,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4191 states. [2021-11-03 05:03:37,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4191 to 4189. [2021-11-03 05:03:37,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4189 states, 4188 states have (on average 1.4718242597898759) internal successors, (6164), 4188 states have internal predecessors, (6164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:37,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4189 states to 4189 states and 6164 transitions. [2021-11-03 05:03:37,314 INFO L78 Accepts]: Start accepts. Automaton has 4189 states and 6164 transitions. Word has length 82 [2021-11-03 05:03:37,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:37,315 INFO L470 AbstractCegarLoop]: Abstraction has 4189 states and 6164 transitions. [2021-11-03 05:03:37,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:37,316 INFO L276 IsEmpty]: Start isEmpty. Operand 4189 states and 6164 transitions. [2021-11-03 05:03:37,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-03 05:03:37,325 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:37,325 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:03:37,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 05:03:37,326 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:03:37,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:37,327 INFO L85 PathProgramCache]: Analyzing trace with hash 683747427, now seen corresponding path program 1 times [2021-11-03 05:03:37,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:03:37,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939149804] [2021-11-03 05:03:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:37,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:03:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:37,421 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:03:37,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939149804] [2021-11-03 05:03:37,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939149804] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:37,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:37,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:03:37,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014398273] [2021-11-03 05:03:37,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:03:37,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:03:37,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:03:37,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:37,424 INFO L87 Difference]: Start difference. First operand 4189 states and 6164 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:37,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:37,877 INFO L93 Difference]: Finished difference Result 10897 states and 15932 transitions. [2021-11-03 05:03:37,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:03:37,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 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 88 [2021-11-03 05:03:37,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:37,917 INFO L225 Difference]: With dead ends: 10897 [2021-11-03 05:03:37,917 INFO L226 Difference]: Without dead ends: 6783 [2021-11-03 05:03:37,925 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:37,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6783 states. [2021-11-03 05:03:38,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6783 to 6781. [2021-11-03 05:03:38,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6781 states, 6780 states have (on average 1.4470501474926254) internal successors, (9811), 6780 states have internal predecessors, (9811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:38,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6781 states to 6781 states and 9811 transitions. [2021-11-03 05:03:38,423 INFO L78 Accepts]: Start accepts. Automaton has 6781 states and 9811 transitions. Word has length 88 [2021-11-03 05:03:38,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:38,424 INFO L470 AbstractCegarLoop]: Abstraction has 6781 states and 9811 transitions. [2021-11-03 05:03:38,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:38,424 INFO L276 IsEmpty]: Start isEmpty. Operand 6781 states and 9811 transitions. [2021-11-03 05:03:38,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-03 05:03:38,446 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:38,446 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:03:38,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 05:03:38,447 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:03:38,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:38,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1209962627, now seen corresponding path program 1 times [2021-11-03 05:03:38,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:03:38,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116382600] [2021-11-03 05:03:38,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:38,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:03:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:38,742 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:03:38,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116382600] [2021-11-03 05:03:38,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116382600] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:38,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:38,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-03 05:03:38,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686042942] [2021-11-03 05:03:38,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-03 05:03:38,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:03:38,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-03 05:03:38,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:03:38,744 INFO L87 Difference]: Start difference. First operand 6781 states and 9811 transitions. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:41,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:41,690 INFO L93 Difference]: Finished difference Result 40376 states and 57866 transitions. [2021-11-03 05:03:41,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:03:41,691 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 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 94 [2021-11-03 05:03:41,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:41,837 INFO L225 Difference]: With dead ends: 40376 [2021-11-03 05:03:41,838 INFO L226 Difference]: Without dead ends: 33664 [2021-11-03 05:03:41,867 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:03:41,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33664 states. [2021-11-03 05:03:44,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33664 to 33654. [2021-11-03 05:03:44,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33654 states, 33653 states have (on average 1.4278667577927673) internal successors, (48052), 33653 states have internal predecessors, (48052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:44,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33654 states to 33654 states and 48052 transitions. [2021-11-03 05:03:44,450 INFO L78 Accepts]: Start accepts. Automaton has 33654 states and 48052 transitions. Word has length 94 [2021-11-03 05:03:44,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:44,451 INFO L470 AbstractCegarLoop]: Abstraction has 33654 states and 48052 transitions. [2021-11-03 05:03:44,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:44,452 INFO L276 IsEmpty]: Start isEmpty. Operand 33654 states and 48052 transitions. [2021-11-03 05:03:44,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-03 05:03:44,527 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:44,528 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:03:44,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 05:03:44,528 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:03:44,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:44,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1875663133, now seen corresponding path program 1 times [2021-11-03 05:03:44,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:03:44,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161419131] [2021-11-03 05:03:44,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:44,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:03:44,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:44,767 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:03:44,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161419131] [2021-11-03 05:03:44,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161419131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:44,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:44,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:03:44,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388850475] [2021-11-03 05:03:44,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:03:44,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:03:44,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:03:44,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:44,778 INFO L87 Difference]: Start difference. First operand 33654 states and 48052 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:47,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:47,971 INFO L93 Difference]: Finished difference Result 82325 states and 117923 transitions. [2021-11-03 05:03:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:03:47,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 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 98 [2021-11-03 05:03:47,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:48,093 INFO L225 Difference]: With dead ends: 82325 [2021-11-03 05:03:48,093 INFO L226 Difference]: Without dead ends: 48696 [2021-11-03 05:03:48,139 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:03:48,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48696 states. [2021-11-03 05:03:51,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48696 to 48694. [2021-11-03 05:03:51,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48694 states, 48693 states have (on average 1.4220729879038054) internal successors, (69245), 48693 states have internal predecessors, (69245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:51,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48694 states to 48694 states and 69245 transitions. [2021-11-03 05:03:51,230 INFO L78 Accepts]: Start accepts. Automaton has 48694 states and 69245 transitions. Word has length 98 [2021-11-03 05:03:51,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:51,230 INFO L470 AbstractCegarLoop]: Abstraction has 48694 states and 69245 transitions. [2021-11-03 05:03:51,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:51,231 INFO L276 IsEmpty]: Start isEmpty. Operand 48694 states and 69245 transitions. [2021-11-03 05:03:51,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-03 05:03:51,360 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:51,360 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:03:51,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 05:03:51,361 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:03:51,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:51,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1477054754, now seen corresponding path program 1 times [2021-11-03 05:03:51,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:03:51,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440986745] [2021-11-03 05:03:51,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:51,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:03:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:51,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:51,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:03:51,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440986745] [2021-11-03 05:03:51,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440986745] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:51,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:51,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 05:03:51,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903466659] [2021-11-03 05:03:51,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:03:51,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:03:51,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:03:51,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:03:51,578 INFO L87 Difference]: Start difference. First operand 48694 states and 69245 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:04:02,434 INFO L93 Difference]: Finished difference Result 211977 states and 301651 transitions. [2021-11-03 05:04:02,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:04:02,446 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 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 98 [2021-11-03 05:04:02,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:04:03,042 INFO L225 Difference]: With dead ends: 211977 [2021-11-03 05:04:03,042 INFO L226 Difference]: Without dead ends: 166050 [2021-11-03 05:04:03,122 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:04:03,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166050 states. [2021-11-03 05:04:09,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166050 to 76051. [2021-11-03 05:04:09,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76051 states, 76050 states have (on average 1.4117948717948718) internal successors, (107367), 76050 states have internal predecessors, (107367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:09,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76051 states to 76051 states and 107367 transitions. [2021-11-03 05:04:09,980 INFO L78 Accepts]: Start accepts. Automaton has 76051 states and 107367 transitions. Word has length 98 [2021-11-03 05:04:09,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:04:09,981 INFO L470 AbstractCegarLoop]: Abstraction has 76051 states and 107367 transitions. [2021-11-03 05:04:09,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:09,981 INFO L276 IsEmpty]: Start isEmpty. Operand 76051 states and 107367 transitions. [2021-11-03 05:04:10,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-03 05:04:10,087 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:04:10,087 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:04:10,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 05:04:10,088 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:04:10,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:04:10,088 INFO L85 PathProgramCache]: Analyzing trace with hash -489626557, now seen corresponding path program 1 times [2021-11-03 05:04:10,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:04:10,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756935946] [2021-11-03 05:04:10,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:04:10,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:04:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:12,929 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:04:12,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756935946] [2021-11-03 05:04:12,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756935946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:04:12,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:04:12,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-03 05:04:12,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737436434] [2021-11-03 05:04:12,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-03 05:04:12,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:04:12,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-03 05:04:12,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-11-03 05:04:12,932 INFO L87 Difference]: Start difference. First operand 76051 states and 107367 transitions. Second operand has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:42,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:04:42,086 INFO L93 Difference]: Finished difference Result 216057 states and 304451 transitions. [2021-11-03 05:04:42,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-03 05:04:42,087 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 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 98 [2021-11-03 05:04:42,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:04:42,588 INFO L225 Difference]: With dead ends: 216057 [2021-11-03 05:04:42,588 INFO L226 Difference]: Without dead ends: 140036 [2021-11-03 05:04:42,754 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=754, Invalid=2906, Unknown=0, NotChecked=0, Total=3660 [2021-11-03 05:04:42,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140036 states. [2021-11-03 05:04:52,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140036 to 100931. [2021-11-03 05:04:52,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100931 states, 100930 states have (on average 1.3963142772218369) internal successors, (140930), 100930 states have internal predecessors, (140930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:52,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100931 states to 100931 states and 140930 transitions. [2021-11-03 05:04:52,769 INFO L78 Accepts]: Start accepts. Automaton has 100931 states and 140930 transitions. Word has length 98 [2021-11-03 05:04:52,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:04:52,770 INFO L470 AbstractCegarLoop]: Abstraction has 100931 states and 140930 transitions. [2021-11-03 05:04:52,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:52,771 INFO L276 IsEmpty]: Start isEmpty. Operand 100931 states and 140930 transitions. [2021-11-03 05:04:52,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-03 05:04:52,881 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:04:52,881 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:04:52,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 05:04:52,881 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:04:52,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:04:52,882 INFO L85 PathProgramCache]: Analyzing trace with hash 2130260003, now seen corresponding path program 1 times [2021-11-03 05:04:52,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:04:52,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207625876] [2021-11-03 05:04:52,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:04:52,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:04:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:52,964 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:04:52,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207625876] [2021-11-03 05:04:52,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207625876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:04:52,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:04:52,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:04:52,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504326735] [2021-11-03 05:04:52,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:04:52,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:04:52,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:04:52,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:04:52,966 INFO L87 Difference]: Start difference. First operand 100931 states and 140930 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 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)