./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF --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 3fcf713e89fe507946e50cd7ac5d1f3269c91b4606b9da766f31c3632a8650aa --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:32:48,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:32:48,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:32:48,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:32:48,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:32:48,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:32:48,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:32:48,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:32:48,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:32:48,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:32:48,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:32:48,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:32:48,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:32:48,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:32:48,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:32:48,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:32:48,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:32:48,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:32:48,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:32:48,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:32:48,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:32:48,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:32:48,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:32:48,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:32:48,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:32:48,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:32:48,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:32:48,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:32:48,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:32:48,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:32:48,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:32:48,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:32:48,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:32:48,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:32:48,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:32:48,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:32:48,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:32:48,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:32:48,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:32:48,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:32:48,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:32:48,590 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:32:48,615 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:32:48,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:32:48,616 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:32:48,616 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:32:48,616 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:32:48,616 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:32:48,617 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:32:48,617 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:32:48,617 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:32:48,617 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:32:48,617 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:32:48,618 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:32:48,618 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:32:48,618 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:32:48,618 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:32:48,618 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:32:48,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:32:48,619 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:32:48,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:32:48,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:32:48,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:32:48,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:32:48,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:32:48,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:32:48,620 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:32:48,621 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:32:48,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:32:48,621 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:32:48,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:32:48,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:32:48,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:32:48,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:32:48,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:32:48,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:32:48,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:32:48,623 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:32:48,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:32:48,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:32:48,623 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:32:48,623 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:32:48,623 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_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3fcf713e89fe507946e50cd7ac5d1f3269c91b4606b9da766f31c3632a8650aa [2021-11-13 02:32:48,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:32:48,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:32:48,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:32:48,916 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:32:48,916 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:32:48,918 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-13 02:32:49,016 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF/data/87bedccee/2ab1f6071b4343338b22bdd820c65101/FLAG545f645c8 [2021-11-13 02:32:49,558 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:32:49,559 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-13 02:32:49,575 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF/data/87bedccee/2ab1f6071b4343338b22bdd820c65101/FLAG545f645c8 [2021-11-13 02:32:49,881 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF/data/87bedccee/2ab1f6071b4343338b22bdd820c65101 [2021-11-13 02:32:49,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:32:49,889 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:32:49,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:32:49,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:32:49,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:32:49,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:32:49" (1/1) ... [2021-11-13 02:32:49,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50b6d093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:49, skipping insertion in model container [2021-11-13 02:32:49,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:32:49" (1/1) ... [2021-11-13 02:32:49,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:32:49,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:32:50,266 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_d1658fea-9e9d-4133-9cc7-de22d417e2a6/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12650,12663] [2021-11-13 02:32:50,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:32:50,351 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:32:50,433 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_d1658fea-9e9d-4133-9cc7-de22d417e2a6/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12650,12663] [2021-11-13 02:32:50,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:32:50,528 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:32:50,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50 WrapperNode [2021-11-13 02:32:50,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:32:50,529 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:32:50,529 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:32:50,530 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:32:50,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50" (1/1) ... [2021-11-13 02:32:50,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50" (1/1) ... [2021-11-13 02:32:50,657 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:32:50,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:32:50,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:32:50,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:32:50,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50" (1/1) ... [2021-11-13 02:32:50,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50" (1/1) ... [2021-11-13 02:32:50,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50" (1/1) ... [2021-11-13 02:32:50,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50" (1/1) ... [2021-11-13 02:32:50,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50" (1/1) ... [2021-11-13 02:32:50,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50" (1/1) ... [2021-11-13 02:32:50,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50" (1/1) ... [2021-11-13 02:32:50,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:32:50,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:32:50,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:32:50,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:32:50,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50" (1/1) ... [2021-11-13 02:32:50,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:32:50,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:50,790 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:32:50,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:32:50,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 02:32:50,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:32:50,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:32:50,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:32:52,428 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:32:52,429 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 02:32:52,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:32:52 BoogieIcfgContainer [2021-11-13 02:32:52,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:32:52,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:32:52,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:32:52,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:32:52,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:32:49" (1/3) ... [2021-11-13 02:32:52,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66082835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:32:52, skipping insertion in model container [2021-11-13 02:32:52,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50" (2/3) ... [2021-11-13 02:32:52,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66082835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:32:52, skipping insertion in model container [2021-11-13 02:32:52,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:32:52" (3/3) ... [2021-11-13 02:32:52,446 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-13 02:32:52,454 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:32:52,455 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:32:52,521 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:32:52,527 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 [2021-11-13 02:32:52,527 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:32:52,549 INFO L276 IsEmpty]: Start isEmpty. Operand has 243 states, 241 states have (on average 1.6639004149377594) internal successors, (401), 242 states have internal predecessors, (401), 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) [2021-11-13 02:32:52,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-13 02:32:52,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:52,564 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:52,564 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:52,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:52,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1791153164, now seen corresponding path program 1 times [2021-11-13 02:32:52,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:52,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8516030] [2021-11-13 02:32:52,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:52,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:32:53,062 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:53,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8516030] [2021-11-13 02:32:53,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8516030] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:53,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:53,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:32:53,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283724949] [2021-11-13 02:32:53,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:53,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:32:53,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:53,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:32:53,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:32:53,099 INFO L87 Difference]: Start difference. First operand has 243 states, 241 states have (on average 1.6639004149377594) internal successors, (401), 242 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-11-13 02:32:53,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:53,304 INFO L93 Difference]: Finished difference Result 408 states and 666 transitions. [2021-11-13 02:32:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:32:53,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 89 [2021-11-13 02:32:53,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:53,321 INFO L225 Difference]: With dead ends: 408 [2021-11-13 02:32:53,321 INFO L226 Difference]: Without dead ends: 313 [2021-11-13 02:32:53,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:32:53,328 INFO L933 BasicCegarLoop]: 479 mSDtfsCounter, 147 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.90ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 123.62ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:53,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 810 Invalid, 71 Unknown, 0 Unchecked, 7.90ms Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 123.62ms Time] [2021-11-13 02:32:53,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-13 02:32:53,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 311. [2021-11-13 02:32:53,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.5580645161290323) internal successors, (483), 310 states have internal predecessors, (483), 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) [2021-11-13 02:32:53,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 483 transitions. [2021-11-13 02:32:53,395 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 483 transitions. Word has length 89 [2021-11-13 02:32:53,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:53,396 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 483 transitions. [2021-11-13 02:32:53,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-11-13 02:32:53,396 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 483 transitions. [2021-11-13 02:32:53,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-13 02:32:53,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:53,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:53,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 02:32:53,402 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:53,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:53,403 INFO L85 PathProgramCache]: Analyzing trace with hash -727100931, now seen corresponding path program 1 times [2021-11-13 02:32:53,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:53,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071280765] [2021-11-13 02:32:53,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:53,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:32:53,527 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:53,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071280765] [2021-11-13 02:32:53,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071280765] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:53,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:53,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:32:53,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506568079] [2021-11-13 02:32:53,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:53,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:32:53,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:53,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:32:53,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:32:53,532 INFO L87 Difference]: Start difference. First operand 311 states and 483 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2021-11-13 02:32:53,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:53,667 INFO L93 Difference]: Finished difference Result 559 states and 885 transitions. [2021-11-13 02:32:53,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:32:53,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 91 [2021-11-13 02:32:53,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:53,673 INFO L225 Difference]: With dead ends: 559 [2021-11-13 02:32:53,673 INFO L226 Difference]: Without dead ends: 400 [2021-11-13 02:32:53,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:32:53,676 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 136 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 87.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.77ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104.02ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:53,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 643 Invalid, 75 Unknown, 0 Unchecked, 3.77ms Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 104.02ms Time] [2021-11-13 02:32:53,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-11-13 02:32:53,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 398. [2021-11-13 02:32:53,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.5642317380352644) internal successors, (621), 397 states have internal predecessors, (621), 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) [2021-11-13 02:32:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 621 transitions. [2021-11-13 02:32:53,715 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 621 transitions. Word has length 91 [2021-11-13 02:32:53,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:53,716 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 621 transitions. [2021-11-13 02:32:53,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2021-11-13 02:32:53,717 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 621 transitions. [2021-11-13 02:32:53,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-13 02:32:53,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:53,728 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:53,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 02:32:53,729 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:53,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:53,729 INFO L85 PathProgramCache]: Analyzing trace with hash 2006695004, now seen corresponding path program 1 times [2021-11-13 02:32:53,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:53,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594757725] [2021-11-13 02:32:53,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:53,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:53,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:32:53,878 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:53,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594757725] [2021-11-13 02:32:53,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594757725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:53,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:53,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:32:53,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997147587] [2021-11-13 02:32:53,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:53,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:32:53,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:53,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:32:53,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:32:53,885 INFO L87 Difference]: Start difference. First operand 398 states and 621 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 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) [2021-11-13 02:32:54,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:54,051 INFO L93 Difference]: Finished difference Result 837 states and 1332 transitions. [2021-11-13 02:32:54,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:32:54,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 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 [2021-11-13 02:32:54,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:54,057 INFO L225 Difference]: With dead ends: 837 [2021-11-13 02:32:54,057 INFO L226 Difference]: Without dead ends: 592 [2021-11-13 02:32:54,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:32:54,067 INFO L933 BasicCegarLoop]: 415 mSDtfsCounter, 136 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.44ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 132.69ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:54,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 721 Invalid, 67 Unknown, 0 Unchecked, 2.44ms Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 132.69ms Time] [2021-11-13 02:32:54,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-13 02:32:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 590. [2021-11-13 02:32:54,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 1.5823429541595926) internal successors, (932), 589 states have internal predecessors, (932), 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) [2021-11-13 02:32:54,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 932 transitions. [2021-11-13 02:32:54,119 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 932 transitions. Word has length 94 [2021-11-13 02:32:54,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:54,120 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 932 transitions. [2021-11-13 02:32:54,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 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) [2021-11-13 02:32:54,121 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 932 transitions. [2021-11-13 02:32:54,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-13 02:32:54,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:54,134 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:54,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 02:32:54,135 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:54,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:54,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1727106365, now seen corresponding path program 1 times [2021-11-13 02:32:54,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:54,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134089193] [2021-11-13 02:32:54,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:54,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:32:54,245 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:54,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134089193] [2021-11-13 02:32:54,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134089193] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:54,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:54,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:32:54,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707399863] [2021-11-13 02:32:54,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:54,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:32:54,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:54,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:32:54,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:32:54,248 INFO L87 Difference]: Start difference. First operand 590 states and 932 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2021-11-13 02:32:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:54,382 INFO L93 Difference]: Finished difference Result 1290 states and 2062 transitions. [2021-11-13 02:32:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:32:54,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2021-11-13 02:32:54,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:54,389 INFO L225 Difference]: With dead ends: 1290 [2021-11-13 02:32:54,390 INFO L226 Difference]: Without dead ends: 853 [2021-11-13 02:32:54,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:32:54,392 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 135 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.93ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.56ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:54,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 659 Invalid, 63 Unknown, 0 Unchecked, 1.93ms Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 90.56ms Time] [2021-11-13 02:32:54,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-11-13 02:32:54,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 851. [2021-11-13 02:32:54,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.5894117647058823) internal successors, (1351), 850 states have internal predecessors, (1351), 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) [2021-11-13 02:32:54,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1351 transitions. [2021-11-13 02:32:54,462 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1351 transitions. Word has length 96 [2021-11-13 02:32:54,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:54,463 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1351 transitions. [2021-11-13 02:32:54,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2021-11-13 02:32:54,463 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1351 transitions. [2021-11-13 02:32:54,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-13 02:32:54,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:54,465 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:54,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 02:32:54,466 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:54,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:54,467 INFO L85 PathProgramCache]: Analyzing trace with hash -158699486, now seen corresponding path program 1 times [2021-11-13 02:32:54,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:54,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653619855] [2021-11-13 02:32:54,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:54,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:32:54,610 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:54,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653619855] [2021-11-13 02:32:54,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653619855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:54,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:54,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:32:54,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033606260] [2021-11-13 02:32:54,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:54,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:32:54,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:54,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:32:54,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:32:54,616 INFO L87 Difference]: Start difference. First operand 851 states and 1351 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2021-11-13 02:32:54,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:54,793 INFO L93 Difference]: Finished difference Result 2058 states and 3306 transitions. [2021-11-13 02:32:54,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:32:54,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 99 [2021-11-13 02:32:54,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:54,804 INFO L225 Difference]: With dead ends: 2058 [2021-11-13 02:32:54,804 INFO L226 Difference]: Without dead ends: 1378 [2021-11-13 02:32:54,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:32:54,808 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 130 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.15ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.80ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:54,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 694 Invalid, 67 Unknown, 0 Unchecked, 2.15ms Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 98.80ms Time] [2021-11-13 02:32:54,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-11-13 02:32:54,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1376. [2021-11-13 02:32:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 1.5978181818181818) internal successors, (2197), 1375 states have internal predecessors, (2197), 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) [2021-11-13 02:32:54,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 2197 transitions. [2021-11-13 02:32:54,904 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 2197 transitions. Word has length 99 [2021-11-13 02:32:54,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:54,908 INFO L470 AbstractCegarLoop]: Abstraction has 1376 states and 2197 transitions. [2021-11-13 02:32:54,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2021-11-13 02:32:54,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 2197 transitions. [2021-11-13 02:32:54,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-13 02:32:54,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:54,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:54,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 02:32:54,911 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:54,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:54,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1123710545, now seen corresponding path program 1 times [2021-11-13 02:32:54,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:54,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002862253] [2021-11-13 02:32:54,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:54,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:55,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:32:55,029 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:55,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002862253] [2021-11-13 02:32:55,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002862253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:55,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:55,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:32:55,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455220156] [2021-11-13 02:32:55,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:55,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:32:55,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:55,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:32:55,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:32:55,032 INFO L87 Difference]: Start difference. First operand 1376 states and 2197 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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) [2021-11-13 02:32:55,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:55,239 INFO L93 Difference]: Finished difference Result 3279 states and 5268 transitions. [2021-11-13 02:32:55,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:32:55,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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 101 [2021-11-13 02:32:55,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:55,254 INFO L225 Difference]: With dead ends: 3279 [2021-11-13 02:32:55,254 INFO L226 Difference]: Without dead ends: 2074 [2021-11-13 02:32:55,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:32:55,260 INFO L933 BasicCegarLoop]: 344 mSDtfsCounter, 129 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.15ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 96.77ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:55,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 661 Invalid, 63 Unknown, 0 Unchecked, 3.15ms Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 96.77ms Time] [2021-11-13 02:32:55,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2021-11-13 02:32:55,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2072. [2021-11-13 02:32:55,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 1.5997102848865283) internal successors, (3313), 2071 states have internal predecessors, (3313), 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) [2021-11-13 02:32:55,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 3313 transitions. [2021-11-13 02:32:55,410 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 3313 transitions. Word has length 101 [2021-11-13 02:32:55,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:55,411 INFO L470 AbstractCegarLoop]: Abstraction has 2072 states and 3313 transitions. [2021-11-13 02:32:55,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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) [2021-11-13 02:32:55,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 3313 transitions. [2021-11-13 02:32:55,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-13 02:32:55,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:55,413 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:55,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 02:32:55,415 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:55,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:55,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1686559704, now seen corresponding path program 1 times [2021-11-13 02:32:55,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:55,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329578736] [2021-11-13 02:32:55,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:55,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:32:55,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:55,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329578736] [2021-11-13 02:32:55,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329578736] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:55,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:55,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:32:55,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892721076] [2021-11-13 02:32:55,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:55,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:32:55,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:55,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:32:55,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:32:55,488 INFO L87 Difference]: Start difference. First operand 2072 states and 3313 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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) [2021-11-13 02:32:55,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:55,832 INFO L93 Difference]: Finished difference Result 5379 states and 8652 transitions. [2021-11-13 02:32:55,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:32:55,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 104 [2021-11-13 02:32:55,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:55,857 INFO L225 Difference]: With dead ends: 5379 [2021-11-13 02:32:55,858 INFO L226 Difference]: Without dead ends: 3496 [2021-11-13 02:32:55,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:32:55,868 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 124 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.86ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 133.77ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:55,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 667 Invalid, 67 Unknown, 0 Unchecked, 1.86ms Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 133.77ms Time] [2021-11-13 02:32:55,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2021-11-13 02:32:56,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 3494. [2021-11-13 02:32:56,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3494 states, 3493 states have (on average 1.6003435442313199) internal successors, (5590), 3493 states have internal predecessors, (5590), 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) [2021-11-13 02:32:56,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3494 states to 3494 states and 5590 transitions. [2021-11-13 02:32:56,147 INFO L78 Accepts]: Start accepts. Automaton has 3494 states and 5590 transitions. Word has length 104 [2021-11-13 02:32:56,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:56,147 INFO L470 AbstractCegarLoop]: Abstraction has 3494 states and 5590 transitions. [2021-11-13 02:32:56,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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) [2021-11-13 02:32:56,148 INFO L276 IsEmpty]: Start isEmpty. Operand 3494 states and 5590 transitions. [2021-11-13 02:32:56,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-13 02:32:56,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:56,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:56,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 02:32:56,150 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:56,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:56,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1560949449, now seen corresponding path program 1 times [2021-11-13 02:32:56,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:56,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888963900] [2021-11-13 02:32:56,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:56,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:56,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:32:56,215 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:56,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888963900] [2021-11-13 02:32:56,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888963900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:56,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:56,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:32:56,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613673012] [2021-11-13 02:32:56,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:56,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:32:56,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:56,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:32:56,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:32:56,219 INFO L87 Difference]: Start difference. First operand 3494 states and 5590 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2021-11-13 02:32:56,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:56,645 INFO L93 Difference]: Finished difference Result 8700 states and 13962 transitions. [2021-11-13 02:32:56,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:32:56,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 106 [2021-11-13 02:32:56,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:56,680 INFO L225 Difference]: With dead ends: 8700 [2021-11-13 02:32:56,681 INFO L226 Difference]: Without dead ends: 5395 [2021-11-13 02:32:56,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:32:56,688 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 123 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.91ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.79ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:56,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 663 Invalid, 63 Unknown, 0 Unchecked, 1.91ms Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 87.79ms Time] [2021-11-13 02:32:56,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5395 states. [2021-11-13 02:32:57,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5395 to 5393. [2021-11-13 02:32:57,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5393 states, 5392 states have (on average 1.5992210682492582) internal successors, (8623), 5392 states have internal predecessors, (8623), 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) [2021-11-13 02:32:57,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5393 states to 5393 states and 8623 transitions. [2021-11-13 02:32:57,056 INFO L78 Accepts]: Start accepts. Automaton has 5393 states and 8623 transitions. Word has length 106 [2021-11-13 02:32:57,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:57,057 INFO L470 AbstractCegarLoop]: Abstraction has 5393 states and 8623 transitions. [2021-11-13 02:32:57,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2021-11-13 02:32:57,057 INFO L276 IsEmpty]: Start isEmpty. Operand 5393 states and 8623 transitions. [2021-11-13 02:32:57,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-13 02:32:57,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:57,060 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:57,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 02:32:57,061 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:57,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:57,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1036556746, now seen corresponding path program 1 times [2021-11-13 02:32:57,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:57,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480226915] [2021-11-13 02:32:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:57,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:32:57,158 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:57,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480226915] [2021-11-13 02:32:57,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480226915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:57,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:57,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 02:32:57,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401608043] [2021-11-13 02:32:57,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:57,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:32:57,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:57,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:32:57,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:32:57,162 INFO L87 Difference]: Start difference. First operand 5393 states and 8623 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2021-11-13 02:32:58,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:58,155 INFO L93 Difference]: Finished difference Result 13476 states and 21549 transitions. [2021-11-13 02:32:58,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:32:58,156 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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 109 [2021-11-13 02:32:58,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:58,208 INFO L225 Difference]: With dead ends: 13476 [2021-11-13 02:32:58,209 INFO L226 Difference]: Without dead ends: 8290 [2021-11-13 02:32:58,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:32:58,218 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 1040 mSDsluCounter, 2815 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 308.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1040 SdHoareTripleChecker+Valid, 3045 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.74ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 410.49ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:58,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1040 Valid, 3045 Invalid, 387 Unknown, 0 Unchecked, 11.74ms Time], IncrementalHoareTripleChecker [7 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 410.49ms Time] [2021-11-13 02:32:58,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2021-11-13 02:32:58,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8276. [2021-11-13 02:32:58,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8276 states, 8275 states have (on average 1.589728096676737) internal successors, (13155), 8275 states have internal predecessors, (13155), 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) [2021-11-13 02:32:58,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8276 states to 8276 states and 13155 transitions. [2021-11-13 02:32:58,901 INFO L78 Accepts]: Start accepts. Automaton has 8276 states and 13155 transitions. Word has length 109 [2021-11-13 02:32:58,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:58,902 INFO L470 AbstractCegarLoop]: Abstraction has 8276 states and 13155 transitions. [2021-11-13 02:32:58,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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) [2021-11-13 02:32:58,902 INFO L276 IsEmpty]: Start isEmpty. Operand 8276 states and 13155 transitions. [2021-11-13 02:32:58,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-13 02:32:58,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:58,904 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:58,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 02:32:58,905 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:58,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:58,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2135550104, now seen corresponding path program 1 times [2021-11-13 02:32:58,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:58,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674315021] [2021-11-13 02:32:58,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:58,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:58,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:32:58,971 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:58,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674315021] [2021-11-13 02:32:58,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674315021] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:58,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:58,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:32:58,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468247155] [2021-11-13 02:32:58,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:58,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:32:58,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:58,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:32:58,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:32:58,974 INFO L87 Difference]: Start difference. First operand 8276 states and 13155 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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) [2021-11-13 02:32:59,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:59,612 INFO L93 Difference]: Finished difference Result 16347 states and 26005 transitions. [2021-11-13 02:32:59,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:32:59,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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 110 [2021-11-13 02:32:59,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:59,658 INFO L225 Difference]: With dead ends: 16347 [2021-11-13 02:32:59,658 INFO L226 Difference]: Without dead ends: 8278 [2021-11-13 02:32:59,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:32:59,671 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 255 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 109.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.15ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 131.18ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:59,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 970 Invalid, 119 Unknown, 0 Unchecked, 3.15ms Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 131.18ms Time] [2021-11-13 02:32:59,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8278 states. [2021-11-13 02:33:00,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8278 to 8276. [2021-11-13 02:33:00,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8276 states, 8275 states have (on average 1.585619335347432) internal successors, (13121), 8275 states have internal predecessors, (13121), 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) [2021-11-13 02:33:00,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8276 states to 8276 states and 13121 transitions. [2021-11-13 02:33:00,216 INFO L78 Accepts]: Start accepts. Automaton has 8276 states and 13121 transitions. Word has length 110 [2021-11-13 02:33:00,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:00,217 INFO L470 AbstractCegarLoop]: Abstraction has 8276 states and 13121 transitions. [2021-11-13 02:33:00,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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) [2021-11-13 02:33:00,218 INFO L276 IsEmpty]: Start isEmpty. Operand 8276 states and 13121 transitions. [2021-11-13 02:33:00,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 02:33:00,219 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:00,220 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:00,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 02:33:00,220 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:00,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:00,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1840047811, now seen corresponding path program 1 times [2021-11-13 02:33:00,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:00,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386025011] [2021-11-13 02:33:00,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:00,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:00,294 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:00,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386025011] [2021-11-13 02:33:00,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386025011] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:00,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:00,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:33:00,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442718761] [2021-11-13 02:33:00,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:00,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:00,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:00,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:00,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:00,297 INFO L87 Difference]: Start difference. First operand 8276 states and 13121 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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) [2021-11-13 02:33:01,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:01,010 INFO L93 Difference]: Finished difference Result 16347 states and 25937 transitions. [2021-11-13 02:33:01,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:01,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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 111 [2021-11-13 02:33:01,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:01,049 INFO L225 Difference]: With dead ends: 16347 [2021-11-13 02:33:01,049 INFO L226 Difference]: Without dead ends: 8278 [2021-11-13 02:33:01,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:33:01,064 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 263 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.27ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 133.53ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:01,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 976 Invalid, 120 Unknown, 0 Unchecked, 9.27ms Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 133.53ms Time] [2021-11-13 02:33:01,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8278 states. [2021-11-13 02:33:01,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8278 to 8276. [2021-11-13 02:33:01,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8276 states, 8275 states have (on average 1.5815105740181268) internal successors, (13087), 8275 states have internal predecessors, (13087), 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) [2021-11-13 02:33:01,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8276 states to 8276 states and 13087 transitions. [2021-11-13 02:33:01,661 INFO L78 Accepts]: Start accepts. Automaton has 8276 states and 13087 transitions. Word has length 111 [2021-11-13 02:33:01,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:01,661 INFO L470 AbstractCegarLoop]: Abstraction has 8276 states and 13087 transitions. [2021-11-13 02:33:01,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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) [2021-11-13 02:33:01,662 INFO L276 IsEmpty]: Start isEmpty. Operand 8276 states and 13087 transitions. [2021-11-13 02:33:01,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-13 02:33:01,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:01,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:01,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 02:33:01,664 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:01,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:01,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1264853297, now seen corresponding path program 1 times [2021-11-13 02:33:01,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:01,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779679604] [2021-11-13 02:33:01,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:01,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:01,743 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:01,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779679604] [2021-11-13 02:33:01,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779679604] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:01,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:01,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:33:01,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053323416] [2021-11-13 02:33:01,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:01,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:01,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:01,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:01,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:01,745 INFO L87 Difference]: Start difference. First operand 8276 states and 13087 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2021-11-13 02:33:02,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:02,402 INFO L93 Difference]: Finished difference Result 16347 states and 25869 transitions. [2021-11-13 02:33:02,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:02,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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 112 [2021-11-13 02:33:02,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:02,425 INFO L225 Difference]: With dead ends: 16347 [2021-11-13 02:33:02,425 INFO L226 Difference]: Without dead ends: 8278 [2021-11-13 02:33:02,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:33:02,440 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 261 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.24ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 129.08ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:02,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 979 Invalid, 119 Unknown, 0 Unchecked, 3.24ms Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 129.08ms Time] [2021-11-13 02:33:02,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8278 states. [2021-11-13 02:33:02,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8278 to 8276. [2021-11-13 02:33:02,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8276 states, 8275 states have (on average 1.5774018126888218) internal successors, (13053), 8275 states have internal predecessors, (13053), 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) [2021-11-13 02:33:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8276 states to 8276 states and 13053 transitions. [2021-11-13 02:33:02,942 INFO L78 Accepts]: Start accepts. Automaton has 8276 states and 13053 transitions. Word has length 112 [2021-11-13 02:33:02,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:02,942 INFO L470 AbstractCegarLoop]: Abstraction has 8276 states and 13053 transitions. [2021-11-13 02:33:02,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2021-11-13 02:33:02,943 INFO L276 IsEmpty]: Start isEmpty. Operand 8276 states and 13053 transitions. [2021-11-13 02:33:02,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-13 02:33:02,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:02,945 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:02,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 02:33:02,945 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:02,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:02,946 INFO L85 PathProgramCache]: Analyzing trace with hash -609134524, now seen corresponding path program 1 times [2021-11-13 02:33:02,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:02,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937581361] [2021-11-13 02:33:02,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:02,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:03,025 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:03,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937581361] [2021-11-13 02:33:03,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937581361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:03,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:03,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:33:03,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119252343] [2021-11-13 02:33:03,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:03,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:03,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:03,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:03,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:03,028 INFO L87 Difference]: Start difference. First operand 8276 states and 13053 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:03,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:03,460 INFO L93 Difference]: Finished difference Result 16347 states and 25801 transitions. [2021-11-13 02:33:03,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:03,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-13 02:33:03,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:03,481 INFO L225 Difference]: With dead ends: 16347 [2021-11-13 02:33:03,482 INFO L226 Difference]: Without dead ends: 8278 [2021-11-13 02:33:03,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:33:03,497 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 259 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 103.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.28ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 123.53ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:03,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 982 Invalid, 118 Unknown, 0 Unchecked, 3.28ms Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 123.53ms Time] [2021-11-13 02:33:03,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8278 states. [2021-11-13 02:33:04,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8278 to 8276. [2021-11-13 02:33:04,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8276 states, 8275 states have (on average 1.5732930513595167) internal successors, (13019), 8275 states have internal predecessors, (13019), 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) [2021-11-13 02:33:04,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8276 states to 8276 states and 13019 transitions. [2021-11-13 02:33:04,161 INFO L78 Accepts]: Start accepts. Automaton has 8276 states and 13019 transitions. Word has length 113 [2021-11-13 02:33:04,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:04,161 INFO L470 AbstractCegarLoop]: Abstraction has 8276 states and 13019 transitions. [2021-11-13 02:33:04,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:04,162 INFO L276 IsEmpty]: Start isEmpty. Operand 8276 states and 13019 transitions. [2021-11-13 02:33:04,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-13 02:33:04,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:04,164 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:04,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 02:33:04,164 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:04,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:04,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1514935861, now seen corresponding path program 1 times [2021-11-13 02:33:04,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:04,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46380864] [2021-11-13 02:33:04,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:04,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:04,379 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:04,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46380864] [2021-11-13 02:33:04,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46380864] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:04,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:04,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 02:33:04,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797359495] [2021-11-13 02:33:04,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:04,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:33:04,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:04,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:33:04,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:33:04,382 INFO L87 Difference]: Start difference. First operand 8276 states and 13019 transitions. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2021-11-13 02:33:05,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:05,353 INFO L93 Difference]: Finished difference Result 16347 states and 25733 transitions. [2021-11-13 02:33:05,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:33:05,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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 115 [2021-11-13 02:33:05,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:05,377 INFO L225 Difference]: With dead ends: 16347 [2021-11-13 02:33:05,377 INFO L226 Difference]: Without dead ends: 8278 [2021-11-13 02:33:05,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:33:05,392 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 338 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 187.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.22ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 224.12ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:05,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 1269 Invalid, 191 Unknown, 0 Unchecked, 5.22ms Time], IncrementalHoareTripleChecker [2 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 224.12ms Time] [2021-11-13 02:33:05,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8278 states. [2021-11-13 02:33:05,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8278 to 8276. [2021-11-13 02:33:05,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8276 states, 8275 states have (on average 1.5713595166163141) internal successors, (13003), 8275 states have internal predecessors, (13003), 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) [2021-11-13 02:33:05,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8276 states to 8276 states and 13003 transitions. [2021-11-13 02:33:05,897 INFO L78 Accepts]: Start accepts. Automaton has 8276 states and 13003 transitions. Word has length 115 [2021-11-13 02:33:05,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:05,898 INFO L470 AbstractCegarLoop]: Abstraction has 8276 states and 13003 transitions. [2021-11-13 02:33:05,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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) [2021-11-13 02:33:05,898 INFO L276 IsEmpty]: Start isEmpty. Operand 8276 states and 13003 transitions. [2021-11-13 02:33:05,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-13 02:33:05,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:05,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:05,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 02:33:05,901 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:05,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:05,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2110499679, now seen corresponding path program 1 times [2021-11-13 02:33:05,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:05,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605875786] [2021-11-13 02:33:05,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:05,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:06,072 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:06,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605875786] [2021-11-13 02:33:06,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605875786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:06,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:06,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 02:33:06,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389868482] [2021-11-13 02:33:06,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:06,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:33:06,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:06,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:33:06,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:33:06,074 INFO L87 Difference]: Start difference. First operand 8276 states and 13003 transitions. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 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) [2021-11-13 02:33:07,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:07,009 INFO L93 Difference]: Finished difference Result 20541 states and 32197 transitions. [2021-11-13 02:33:07,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:33:07,014 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 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 118 [2021-11-13 02:33:07,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:07,047 INFO L225 Difference]: With dead ends: 20541 [2021-11-13 02:33:07,047 INFO L226 Difference]: Without dead ends: 12472 [2021-11-13 02:33:07,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:33:07,062 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 438 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 180.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.38ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 214.65ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:07,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 1298 Invalid, 179 Unknown, 0 Unchecked, 5.38ms Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 214.65ms Time] [2021-11-13 02:33:07,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12472 states. [2021-11-13 02:33:07,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12472 to 12470. [2021-11-13 02:33:07,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12470 states, 12469 states have (on average 1.5618734461464432) internal successors, (19475), 12469 states have internal predecessors, (19475), 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) [2021-11-13 02:33:07,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12470 states to 12470 states and 19475 transitions. [2021-11-13 02:33:07,713 INFO L78 Accepts]: Start accepts. Automaton has 12470 states and 19475 transitions. Word has length 118 [2021-11-13 02:33:07,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:07,714 INFO L470 AbstractCegarLoop]: Abstraction has 12470 states and 19475 transitions. [2021-11-13 02:33:07,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 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) [2021-11-13 02:33:07,714 INFO L276 IsEmpty]: Start isEmpty. Operand 12470 states and 19475 transitions. [2021-11-13 02:33:07,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-13 02:33:07,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:07,716 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:07,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 02:33:07,717 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:07,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:07,717 INFO L85 PathProgramCache]: Analyzing trace with hash -969702568, now seen corresponding path program 1 times [2021-11-13 02:33:07,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:07,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234373929] [2021-11-13 02:33:07,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:07,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:07,897 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:07,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234373929] [2021-11-13 02:33:07,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234373929] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:07,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:07,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 02:33:07,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156245755] [2021-11-13 02:33:07,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:07,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:33:07,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:07,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:33:07,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:33:07,902 INFO L87 Difference]: Start difference. First operand 12470 states and 19475 transitions. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 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) [2021-11-13 02:33:09,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:09,028 INFO L93 Difference]: Finished difference Result 15348 states and 23856 transitions. [2021-11-13 02:33:09,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:33:09,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 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 119 [2021-11-13 02:33:09,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:09,062 INFO L225 Difference]: With dead ends: 15348 [2021-11-13 02:33:09,063 INFO L226 Difference]: Without dead ends: 15346 [2021-11-13 02:33:09,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:33:09,071 INFO L933 BasicCegarLoop]: 557 mSDtfsCounter, 369 mSDsluCounter, 1663 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 234.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 2103 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.27ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 286.97ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:09,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 2103 Invalid, 246 Unknown, 0 Unchecked, 8.27ms Time], IncrementalHoareTripleChecker [2 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 286.97ms Time] [2021-11-13 02:33:09,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15346 states. [2021-11-13 02:33:09,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15346 to 12484. [2021-11-13 02:33:09,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12484 states, 12483 states have (on average 1.5596411119122007) internal successors, (19469), 12483 states have internal predecessors, (19469), 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) [2021-11-13 02:33:09,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12484 states to 12484 states and 19469 transitions. [2021-11-13 02:33:09,902 INFO L78 Accepts]: Start accepts. Automaton has 12484 states and 19469 transitions. Word has length 119 [2021-11-13 02:33:09,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:09,903 INFO L470 AbstractCegarLoop]: Abstraction has 12484 states and 19469 transitions. [2021-11-13 02:33:09,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 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) [2021-11-13 02:33:09,903 INFO L276 IsEmpty]: Start isEmpty. Operand 12484 states and 19469 transitions. [2021-11-13 02:33:09,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-13 02:33:09,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:09,905 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:09,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 02:33:09,905 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:09,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:09,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2050752886, now seen corresponding path program 1 times [2021-11-13 02:33:09,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:09,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472664871] [2021-11-13 02:33:09,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:09,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:33:10,626 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:10,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472664871] [2021-11-13 02:33:10,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472664871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:10,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110147747] [2021-11-13 02:33:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:10,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:33:10,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:33:10,629 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:33:10,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 02:33:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:10,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:33:10,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:33:11,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:33:11,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110147747] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:11,900 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:33:11,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [13] total 16 [2021-11-13 02:33:11,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280053303] [2021-11-13 02:33:11,901 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:11,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:33:11,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:11,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:33:11,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:33:11,903 INFO L87 Difference]: Start difference. First operand 12484 states and 19469 transitions. Second operand has 5 states, 5 states have (on average 28.6) internal successors, (143), 4 states have internal predecessors, (143), 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) [2021-11-13 02:33:13,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:13,828 INFO L93 Difference]: Finished difference Result 36750 states and 57353 transitions. [2021-11-13 02:33:13,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:13,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 4 states have internal predecessors, (143), 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 127 [2021-11-13 02:33:13,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:13,871 INFO L225 Difference]: With dead ends: 36750 [2021-11-13 02:33:13,871 INFO L226 Difference]: Without dead ends: 24471 [2021-11-13 02:33:13,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-13 02:33:13,888 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 793 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.95ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 109.78ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:13,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 721 Invalid, 72 Unknown, 0 Unchecked, 3.95ms Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 109.78ms Time] [2021-11-13 02:33:13,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24471 states. [2021-11-13 02:33:15,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24471 to 24469. [2021-11-13 02:33:15,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24469 states, 24468 states have (on average 1.5560732385156122) internal successors, (38074), 24468 states have internal predecessors, (38074), 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) [2021-11-13 02:33:15,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24469 states to 24469 states and 38074 transitions. [2021-11-13 02:33:15,630 INFO L78 Accepts]: Start accepts. Automaton has 24469 states and 38074 transitions. Word has length 127 [2021-11-13 02:33:15,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:15,630 INFO L470 AbstractCegarLoop]: Abstraction has 24469 states and 38074 transitions. [2021-11-13 02:33:15,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 4 states have internal predecessors, (143), 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) [2021-11-13 02:33:15,631 INFO L276 IsEmpty]: Start isEmpty. Operand 24469 states and 38074 transitions. [2021-11-13 02:33:15,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-13 02:33:15,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:15,634 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:15,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:15,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-13 02:33:15,842 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:15,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:15,843 INFO L85 PathProgramCache]: Analyzing trace with hash 2066299650, now seen corresponding path program 1 times [2021-11-13 02:33:15,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:15,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579415539] [2021-11-13 02:33:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:15,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 02:33:15,943 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:15,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579415539] [2021-11-13 02:33:15,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579415539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:15,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:15,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:33:15,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711245619] [2021-11-13 02:33:15,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:15,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:33:15,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:15,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:33:15,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:33:15,946 INFO L87 Difference]: Start difference. First operand 24469 states and 38074 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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) [2021-11-13 02:33:18,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:18,572 INFO L93 Difference]: Finished difference Result 71785 states and 111776 transitions. [2021-11-13 02:33:18,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:33:18,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 129 [2021-11-13 02:33:18,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:18,857 INFO L225 Difference]: With dead ends: 71785 [2021-11-13 02:33:18,857 INFO L226 Difference]: Without dead ends: 47404 [2021-11-13 02:33:18,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:33:18,879 INFO L933 BasicCegarLoop]: 621 mSDtfsCounter, 246 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 113.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.04ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 136.43ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:18,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 943 Invalid, 99 Unknown, 0 Unchecked, 3.04ms Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 136.43ms Time] [2021-11-13 02:33:18,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47404 states. [2021-11-13 02:33:22,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47404 to 47402. [2021-11-13 02:33:22,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47402 states, 47401 states have (on average 1.5497985274572266) internal successors, (73462), 47401 states have internal predecessors, (73462), 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) [2021-11-13 02:33:22,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47402 states to 47402 states and 73462 transitions. [2021-11-13 02:33:22,213 INFO L78 Accepts]: Start accepts. Automaton has 47402 states and 73462 transitions. Word has length 129 [2021-11-13 02:33:22,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:22,213 INFO L470 AbstractCegarLoop]: Abstraction has 47402 states and 73462 transitions. [2021-11-13 02:33:22,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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) [2021-11-13 02:33:22,214 INFO L276 IsEmpty]: Start isEmpty. Operand 47402 states and 73462 transitions. [2021-11-13 02:33:22,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-13 02:33:22,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:22,218 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:22,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 02:33:22,219 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:22,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:22,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2122052879, now seen corresponding path program 1 times [2021-11-13 02:33:22,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:22,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674776336] [2021-11-13 02:33:22,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:22,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:22,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:22,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 02:33:22,266 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:22,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674776336] [2021-11-13 02:33:22,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674776336] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:22,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:22,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:33:22,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798314446] [2021-11-13 02:33:22,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:22,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:33:22,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:22,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:33:22,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:33:22,270 INFO L87 Difference]: Start difference. First operand 47402 states and 73462 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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) [2021-11-13 02:33:28,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:28,691 INFO L93 Difference]: Finished difference Result 142113 states and 220236 transitions. [2021-11-13 02:33:28,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:33:28,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 129 [2021-11-13 02:33:28,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:28,907 INFO L225 Difference]: With dead ends: 142113 [2021-11-13 02:33:28,907 INFO L226 Difference]: Without dead ends: 94759 [2021-11-13 02:33:28,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:33:28,975 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 306 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.68ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116.93ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:28,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 664 Invalid, 68 Unknown, 0 Unchecked, 2.68ms Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 116.93ms Time] [2021-11-13 02:33:29,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94759 states. [2021-11-13 02:33:33,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94759 to 47416. [2021-11-13 02:33:33,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47416 states, 47415 states have (on average 1.5497205525677529) internal successors, (73480), 47415 states have internal predecessors, (73480), 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) [2021-11-13 02:33:33,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47416 states to 47416 states and 73480 transitions. [2021-11-13 02:33:33,384 INFO L78 Accepts]: Start accepts. Automaton has 47416 states and 73480 transitions. Word has length 129 [2021-11-13 02:33:33,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:33,385 INFO L470 AbstractCegarLoop]: Abstraction has 47416 states and 73480 transitions. [2021-11-13 02:33:33,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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) [2021-11-13 02:33:33,385 INFO L276 IsEmpty]: Start isEmpty. Operand 47416 states and 73480 transitions. [2021-11-13 02:33:33,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-13 02:33:33,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:33,389 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:33,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-13 02:33:33,390 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:33,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:33,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1364135696, now seen corresponding path program 1 times [2021-11-13 02:33:33,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:33,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300371112] [2021-11-13 02:33:33,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:33,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:33:33,502 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:33,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300371112] [2021-11-13 02:33:33,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300371112] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:33,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:33,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:33:33,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962547012] [2021-11-13 02:33:33,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:33,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:33:33,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:33,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:33:33,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:33:33,505 INFO L87 Difference]: Start difference. First operand 47416 states and 73480 transitions. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 4 states have internal predecessors, (128), 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) [2021-11-13 02:33:37,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:37,990 INFO L93 Difference]: Finished difference Result 94174 states and 146009 transitions. [2021-11-13 02:33:37,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:33:37,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 4 states have internal predecessors, (128), 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 130 [2021-11-13 02:33:37,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:38,085 INFO L225 Difference]: With dead ends: 94174 [2021-11-13 02:33:38,085 INFO L226 Difference]: Without dead ends: 47416 [2021-11-13 02:33:38,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:33:38,120 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 585 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 126.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.02ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 152.78ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:38,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [585 Valid, 644 Invalid, 136 Unknown, 0 Unchecked, 4.02ms Time], IncrementalHoareTripleChecker [5 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 152.78ms Time] [2021-11-13 02:33:38,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47416 states. [2021-11-13 02:33:42,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47416 to 47416. [2021-11-13 02:33:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47416 states, 47415 states have (on average 1.5258884319308237) internal successors, (72350), 47415 states have internal predecessors, (72350), 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) [2021-11-13 02:33:42,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47416 states to 47416 states and 72350 transitions. [2021-11-13 02:33:42,874 INFO L78 Accepts]: Start accepts. Automaton has 47416 states and 72350 transitions. Word has length 130 [2021-11-13 02:33:42,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:42,875 INFO L470 AbstractCegarLoop]: Abstraction has 47416 states and 72350 transitions. [2021-11-13 02:33:42,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 4 states have internal predecessors, (128), 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) [2021-11-13 02:33:42,875 INFO L276 IsEmpty]: Start isEmpty. Operand 47416 states and 72350 transitions. [2021-11-13 02:33:42,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-13 02:33:42,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:42,879 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:42,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-13 02:33:42,880 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:42,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:42,880 INFO L85 PathProgramCache]: Analyzing trace with hash 154822123, now seen corresponding path program 1 times [2021-11-13 02:33:42,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:42,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602450537] [2021-11-13 02:33:42,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:42,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:33:43,475 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:43,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602450537] [2021-11-13 02:33:43,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602450537] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:43,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513953340] [2021-11-13 02:33:43,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:43,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:33:43,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:33:43,478 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:33:43,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1658fea-9e9d-4133-9cc7-de22d417e2a6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 02:33:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:43,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:33:43,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 02:33:44,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 02:33:44,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513953340] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:44,714 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:33:44,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [13] total 16 [2021-11-13 02:33:44,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858483034] [2021-11-13 02:33:44,718 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:44,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:33:44,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:44,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:33:44,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:33:44,720 INFO L87 Difference]: Start difference. First operand 47416 states and 72350 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 4 states have internal predecessors, (148), 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)