./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d804c4ae-4900-4911-a56a-dc872bd76896/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d804c4ae-4900-4911-a56a-dc872bd76896/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d804c4ae-4900-4911-a56a-dc872bd76896/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d804c4ae-4900-4911-a56a-dc872bd76896/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d804c4ae-4900-4911-a56a-dc872bd76896/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d804c4ae-4900-4911-a56a-dc872bd76896/bin/utaipan-EQgc7hIp5V --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 5c7b2e547f39f7d53d20335ecc1b1fbde6acdc52384cb52caa86017352bf317a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:21:39,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:21:39,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:21:39,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:21:39,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:21:39,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:21:39,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:21:39,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:21:39,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:21:39,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:21:39,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:21:39,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:21:39,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:21:39,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:21:39,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:21:39,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:21:39,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:21:39,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:21:39,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:21:39,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:21:39,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:21:39,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:21:39,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:21:39,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:21:39,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:21:39,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:21:39,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:21:39,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:21:39,613 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:21:39,614 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:21:39,615 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:21:39,616 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:21:39,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:21:39,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:21:39,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:21:39,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:21:39,622 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:21:39,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:21:39,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:21:39,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:21:39,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:21:39,628 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d804c4ae-4900-4911-a56a-dc872bd76896/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:21:39,657 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:21:39,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:21:39,658 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:21:39,659 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:21:39,659 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:21:39,660 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:21:39,660 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:21:39,660 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:21:39,661 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:21:39,661 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:21:39,661 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:21:39,662 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:21:39,662 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:21:39,662 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:21:39,662 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:21:39,663 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:21:39,663 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:21:39,663 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:21:39,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:21:39,664 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:21:39,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:21:39,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:21:39,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:21:39,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:21:39,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:21:39,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:21:39,666 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:21:39,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:21:39,667 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:21:39,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:21:39,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:21:39,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:21:39,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:21:39,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:21:39,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:21:39,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:21:39,669 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:21:39,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:21:39,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:21:39,670 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:21:39,670 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:21:39,671 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_d804c4ae-4900-4911-a56a-dc872bd76896/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d804c4ae-4900-4911-a56a-dc872bd76896/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c7b2e547f39f7d53d20335ecc1b1fbde6acdc52384cb52caa86017352bf317a [2021-11-23 02:21:39,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:21:40,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:21:40,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:21:40,026 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:21:40,027 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:21:40,028 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d804c4ae-4900-4911-a56a-dc872bd76896/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-23 02:21:40,114 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d804c4ae-4900-4911-a56a-dc872bd76896/bin/utaipan-EQgc7hIp5V/data/70bafae02/86bb2aa4b2c3444bbff7bd2058501e37/FLAGd45b45707 [2021-11-23 02:21:40,719 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:21:40,720 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d804c4ae-4900-4911-a56a-dc872bd76896/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-23 02:21:40,737 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d804c4ae-4900-4911-a56a-dc872bd76896/bin/utaipan-EQgc7hIp5V/data/70bafae02/86bb2aa4b2c3444bbff7bd2058501e37/FLAGd45b45707 [2021-11-23 02:21:41,001 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d804c4ae-4900-4911-a56a-dc872bd76896/bin/utaipan-EQgc7hIp5V/data/70bafae02/86bb2aa4b2c3444bbff7bd2058501e37 [2021-11-23 02:21:41,015 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:21:41,016 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:21:41,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:21:41,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:21:41,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:21:41,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:21:41" (1/1) ... [2021-11-23 02:21:41,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fff2dde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:41, skipping insertion in model container [2021-11-23 02:21:41,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:21:41" (1/1) ... [2021-11-23 02:21:41,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:21:41,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:21:41,460 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d804c4ae-4900-4911-a56a-dc872bd76896/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7834,7847] [2021-11-23 02:21:41,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:21:41,547 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:21:41,659 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d804c4ae-4900-4911-a56a-dc872bd76896/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7834,7847] [2021-11-23 02:21:41,735 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:21:41,757 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:21:41,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:41 WrapperNode [2021-11-23 02:21:41,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:21:41,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:21:41,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:21:41,760 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:21:41,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:41" (1/1) ... [2021-11-23 02:21:41,786 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:41" (1/1) ... [2021-11-23 02:21:41,879 INFO L137 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 616 [2021-11-23 02:21:41,879 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:21:41,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:21:41,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:21:41,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:21:41,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:41" (1/1) ... [2021-11-23 02:21:41,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:41" (1/1) ... [2021-11-23 02:21:41,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:41" (1/1) ... [2021-11-23 02:21:41,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:41" (1/1) ... [2021-11-23 02:21:41,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:41" (1/1) ... [2021-11-23 02:21:41,967 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:41" (1/1) ... [2021-11-23 02:21:41,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:41" (1/1) ... [2021-11-23 02:21:41,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:21:41,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:21:41,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:21:41,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:21:41,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:41" (1/1) ... [2021-11-23 02:21:42,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:21:42,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d804c4ae-4900-4911-a56a-dc872bd76896/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:21:42,049 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d804c4ae-4900-4911-a56a-dc872bd76896/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:21:42,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d804c4ae-4900-4911-a56a-dc872bd76896/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:21:42,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:21:42,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:21:42,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:21:42,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:21:42,305 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:21:42,307 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:21:43,188 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:21:43,337 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:21:43,337 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:21:43,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:21:43 BoogieIcfgContainer [2021-11-23 02:21:43,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:21:43,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:21:43,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:21:43,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:21:43,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:21:41" (1/3) ... [2021-11-23 02:21:43,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d63f5e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:21:43, skipping insertion in model container [2021-11-23 02:21:43,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:41" (2/3) ... [2021-11-23 02:21:43,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d63f5e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:21:43, skipping insertion in model container [2021-11-23 02:21:43,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:21:43" (3/3) ... [2021-11-23 02:21:43,350 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-23 02:21:43,356 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:21:43,356 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:21:43,409 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:21:43,417 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 [2021-11-23 02:21:43,418 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:21:43,436 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 102 states have (on average 1.7647058823529411) internal successors, (180), 103 states have internal predecessors, (180), 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) [2021-11-23 02:21:43,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 02:21:43,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:43,446 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] [2021-11-23 02:21:43,447 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:43,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:43,459 INFO L85 PathProgramCache]: Analyzing trace with hash -853769130, now seen corresponding path program 1 times [2021-11-23 02:21:43,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:43,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418457850] [2021-11-23 02:21:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:43,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:21:43,961 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:43,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418457850] [2021-11-23 02:21:43,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418457850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:21:43,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:21:43,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:21:43,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038349174] [2021-11-23 02:21:43,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:43,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:21:43,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:44,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:21:44,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:21:44,021 INFO L87 Difference]: Start difference. First operand has 104 states, 102 states have (on average 1.7647058823529411) internal successors, (180), 103 states have internal predecessors, (180), 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 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:21:44,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:44,349 INFO L93 Difference]: Finished difference Result 176 states and 291 transitions. [2021-11-23 02:21:44,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:21:44,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-23 02:21:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:44,364 INFO L225 Difference]: With dead ends: 176 [2021-11-23 02:21:44,364 INFO L226 Difference]: Without dead ends: 102 [2021-11-23 02:21:44,368 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 [2021-11-23 02:21:44,373 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 479 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:44,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 111 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:21:44,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-23 02:21:44,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-11-23 02:21:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 101 states have internal predecessors, (123), 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) [2021-11-23 02:21:44,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 123 transitions. [2021-11-23 02:21:44,527 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 123 transitions. Word has length 64 [2021-11-23 02:21:44,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:44,528 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 123 transitions. [2021-11-23 02:21:44,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:21:44,529 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 123 transitions. [2021-11-23 02:21:44,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 02:21:44,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:44,532 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] [2021-11-23 02:21:44,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:21:44,533 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:44,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:44,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1847172465, now seen corresponding path program 1 times [2021-11-23 02:21:44,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:44,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694627050] [2021-11-23 02:21:44,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:44,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:21:44,737 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:44,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694627050] [2021-11-23 02:21:44,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694627050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:21:44,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:21:44,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:21:44,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090678476] [2021-11-23 02:21:44,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:44,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:21:44,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:44,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:21:44,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:21:44,742 INFO L87 Difference]: Start difference. First operand 102 states and 123 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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) [2021-11-23 02:21:44,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:44,884 INFO L93 Difference]: Finished difference Result 152 states and 190 transitions. [2021-11-23 02:21:44,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:21:44,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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 65 [2021-11-23 02:21:44,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:44,887 INFO L225 Difference]: With dead ends: 152 [2021-11-23 02:21:44,887 INFO L226 Difference]: Without dead ends: 102 [2021-11-23 02:21:44,888 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 [2021-11-23 02:21:44,890 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 272 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:44,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 96 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:21:44,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-23 02:21:44,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-11-23 02:21:44,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.198019801980198) internal successors, (121), 101 states have internal predecessors, (121), 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) [2021-11-23 02:21:44,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 121 transitions. [2021-11-23 02:21:44,931 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 121 transitions. Word has length 65 [2021-11-23 02:21:44,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:44,934 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 121 transitions. [2021-11-23 02:21:44,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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) [2021-11-23 02:21:44,935 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 121 transitions. [2021-11-23 02:21:44,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 02:21:44,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:44,942 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] [2021-11-23 02:21:44,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:21:44,943 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:44,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:44,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1316074358, now seen corresponding path program 1 times [2021-11-23 02:21:44,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:44,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959981878] [2021-11-23 02:21:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:44,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:21:45,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:45,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959981878] [2021-11-23 02:21:45,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959981878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:21:45,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:21:45,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:21:45,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115692056] [2021-11-23 02:21:45,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:45,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:21:45,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:45,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:21:45,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:21:45,095 INFO L87 Difference]: Start difference. First operand 102 states and 121 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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) [2021-11-23 02:21:45,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:45,228 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2021-11-23 02:21:45,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:21:45,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 66 [2021-11-23 02:21:45,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:45,230 INFO L225 Difference]: With dead ends: 160 [2021-11-23 02:21:45,231 INFO L226 Difference]: Without dead ends: 102 [2021-11-23 02:21:45,232 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 [2021-11-23 02:21:45,244 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 288 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:45,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 80 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:21:45,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-23 02:21:45,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-11-23 02:21:45,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 101 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) [2021-11-23 02:21:45,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2021-11-23 02:21:45,266 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 66 [2021-11-23 02:21:45,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:45,268 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2021-11-23 02:21:45,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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) [2021-11-23 02:21:45,269 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2021-11-23 02:21:45,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 02:21:45,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:45,276 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] [2021-11-23 02:21:45,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:21:45,277 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:45,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:45,279 INFO L85 PathProgramCache]: Analyzing trace with hash 990643055, now seen corresponding path program 1 times [2021-11-23 02:21:45,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:45,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133865836] [2021-11-23 02:21:45,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:45,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:21:45,452 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:45,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133865836] [2021-11-23 02:21:45,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133865836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:21:45,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:21:45,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:21:45,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954339447] [2021-11-23 02:21:45,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:45,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:21:45,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:45,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:21:45,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:21:45,456 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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) [2021-11-23 02:21:45,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:45,614 INFO L93 Difference]: Finished difference Result 156 states and 188 transitions. [2021-11-23 02:21:45,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:21:45,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 67 [2021-11-23 02:21:45,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:45,616 INFO L225 Difference]: With dead ends: 156 [2021-11-23 02:21:45,616 INFO L226 Difference]: Without dead ends: 102 [2021-11-23 02:21:45,617 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 [2021-11-23 02:21:45,619 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 270 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:45,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 88 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:21:45,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-23 02:21:45,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-11-23 02:21:45,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 101 states have internal predecessors, (117), 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) [2021-11-23 02:21:45,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2021-11-23 02:21:45,634 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 67 [2021-11-23 02:21:45,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:45,635 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2021-11-23 02:21:45,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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) [2021-11-23 02:21:45,635 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2021-11-23 02:21:45,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 02:21:45,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:45,637 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] [2021-11-23 02:21:45,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:21:45,637 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:45,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:45,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1627175134, now seen corresponding path program 1 times [2021-11-23 02:21:45,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:45,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668940714] [2021-11-23 02:21:45,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:45,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:45,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:21:45,722 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:45,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668940714] [2021-11-23 02:21:45,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668940714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:21:45,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:21:45,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:21:45,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213632112] [2021-11-23 02:21:45,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:45,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:21:45,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:45,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:21:45,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:21:45,726 INFO L87 Difference]: Start difference. First operand 102 states and 117 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-11-23 02:21:45,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:45,864 INFO L93 Difference]: Finished difference Result 164 states and 193 transitions. [2021-11-23 02:21:45,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:21:45,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 68 [2021-11-23 02:21:45,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:45,866 INFO L225 Difference]: With dead ends: 164 [2021-11-23 02:21:45,867 INFO L226 Difference]: Without dead ends: 102 [2021-11-23 02:21:45,867 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 [2021-11-23 02:21:45,869 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 287 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:45,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 72 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:21:45,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-23 02:21:45,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-11-23 02:21:45,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 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) [2021-11-23 02:21:45,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2021-11-23 02:21:45,882 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 68 [2021-11-23 02:21:45,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:45,883 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2021-11-23 02:21:45,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2021-11-23 02:21:45,883 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2021-11-23 02:21:45,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 02:21:45,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:45,884 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] [2021-11-23 02:21:45,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:21:45,885 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:45,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:45,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1174071911, now seen corresponding path program 1 times [2021-11-23 02:21:45,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:45,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991124904] [2021-11-23 02:21:45,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:45,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:21:53,056 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:53,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991124904] [2021-11-23 02:21:53,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991124904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:21:53,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:21:53,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-11-23 02:21:53,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698448460] [2021-11-23 02:21:53,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:53,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 02:21:53,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:53,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 02:21:53,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 02:21:53,060 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 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) [2021-11-23 02:22:02,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:22:02,463 INFO L93 Difference]: Finished difference Result 175 states and 212 transitions. [2021-11-23 02:22:02,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-23 02:22:02,465 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 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 69 [2021-11-23 02:22:02,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:22:02,466 INFO L225 Difference]: With dead ends: 175 [2021-11-23 02:22:02,466 INFO L226 Difference]: Without dead ends: 137 [2021-11-23 02:22:02,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=778, Invalid=2528, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 02:22:02,471 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 661 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:22:02,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 822 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 02:22:02,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-23 02:22:02,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2021-11-23 02:22:02,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.1865671641791045) internal successors, (159), 134 states have internal predecessors, (159), 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) [2021-11-23 02:22:02,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 159 transitions. [2021-11-23 02:22:02,521 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 159 transitions. Word has length 69 [2021-11-23 02:22:02,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:02,523 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 159 transitions. [2021-11-23 02:22:02,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 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) [2021-11-23 02:22:02,524 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 159 transitions. [2021-11-23 02:22:02,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:22:02,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:02,525 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] [2021-11-23 02:22:02,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:22:02,525 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:02,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:02,527 INFO L85 PathProgramCache]: Analyzing trace with hash 971361958, now seen corresponding path program 1 times [2021-11-23 02:22:02,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:02,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091909119] [2021-11-23 02:22:02,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:02,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:22:15,841 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:15,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091909119] [2021-11-23 02:22:15,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091909119] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:15,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:22:15,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-11-23 02:22:15,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645330662] [2021-11-23 02:22:15,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:15,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-23 02:22:15,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:15,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-23 02:22:15,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1367, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 02:22:15,845 INFO L87 Difference]: Start difference. First operand 135 states and 159 transitions. Second operand has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 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) [2021-11-23 02:22:37,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:22:37,528 INFO L93 Difference]: Finished difference Result 244 states and 304 transitions. [2021-11-23 02:22:37,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-23 02:22:37,528 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 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 71 [2021-11-23 02:22:37,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:22:37,531 INFO L225 Difference]: With dead ends: 244 [2021-11-23 02:22:37,531 INFO L226 Difference]: Without dead ends: 173 [2021-11-23 02:22:37,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=1190, Invalid=3780, Unknown=0, NotChecked=0, Total=4970 [2021-11-23 02:22:37,536 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 713 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:22:37,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 685 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1226 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 02:22:37,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-23 02:22:37,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2021-11-23 02:22:37,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.2176470588235293) internal successors, (207), 170 states have internal predecessors, (207), 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) [2021-11-23 02:22:37,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 207 transitions. [2021-11-23 02:22:37,567 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 207 transitions. Word has length 71 [2021-11-23 02:22:37,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:37,568 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 207 transitions. [2021-11-23 02:22:37,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 39 states have internal predecessors, (71), 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) [2021-11-23 02:22:37,569 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 207 transitions. [2021-11-23 02:22:37,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:22:37,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:37,570 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] [2021-11-23 02:22:37,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:22:37,570 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:37,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:37,571 INFO L85 PathProgramCache]: Analyzing trace with hash 775009477, now seen corresponding path program 1 times [2021-11-23 02:22:37,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:37,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303790708] [2021-11-23 02:22:37,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:37,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:22:37,702 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:37,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303790708] [2021-11-23 02:22:37,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303790708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:37,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:22:37,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:22:37,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538503055] [2021-11-23 02:22:37,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:37,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:22:37,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:37,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:22:37,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:22:37,705 INFO L87 Difference]: Start difference. First operand 171 states and 207 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2021-11-23 02:22:37,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:22:37,815 INFO L93 Difference]: Finished difference Result 384 states and 492 transitions. [2021-11-23 02:22:37,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:22:37,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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 71 [2021-11-23 02:22:37,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:22:37,820 INFO L225 Difference]: With dead ends: 384 [2021-11-23 02:22:37,820 INFO L226 Difference]: Without dead ends: 277 [2021-11-23 02:22:37,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:22:37,826 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 47 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:22:37,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 301 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:22:37,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-23 02:22:37,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 275. [2021-11-23 02:22:37,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.2627737226277371) internal successors, (346), 274 states have internal predecessors, (346), 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) [2021-11-23 02:22:37,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 346 transitions. [2021-11-23 02:22:37,895 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 346 transitions. Word has length 71 [2021-11-23 02:22:37,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:37,898 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 346 transitions. [2021-11-23 02:22:37,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2021-11-23 02:22:37,899 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 346 transitions. [2021-11-23 02:22:37,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 02:22:37,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:37,900 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] [2021-11-23 02:22:37,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:22:37,900 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:37,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:37,901 INFO L85 PathProgramCache]: Analyzing trace with hash 57039674, now seen corresponding path program 1 times [2021-11-23 02:22:37,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:37,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177055755] [2021-11-23 02:22:37,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:37,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:22:37,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:37,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177055755] [2021-11-23 02:22:37,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177055755] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:37,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:22:37,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:22:37,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527686900] [2021-11-23 02:22:37,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:37,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:22:37,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:37,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:22:37,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:22:37,997 INFO L87 Difference]: Start difference. First operand 275 states and 346 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 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) [2021-11-23 02:22:38,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:22:38,254 INFO L93 Difference]: Finished difference Result 537 states and 694 transitions. [2021-11-23 02:22:38,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:22:38,255 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 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 72 [2021-11-23 02:22:38,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:22:38,261 INFO L225 Difference]: With dead ends: 537 [2021-11-23 02:22:38,261 INFO L226 Difference]: Without dead ends: 430 [2021-11-23 02:22:38,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:22:38,265 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 235 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:22:38,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 588 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:22:38,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-11-23 02:22:38,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 238. [2021-11-23 02:22:38,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.2447257383966244) internal successors, (295), 237 states have internal predecessors, (295), 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) [2021-11-23 02:22:38,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 295 transitions. [2021-11-23 02:22:38,316 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 295 transitions. Word has length 72 [2021-11-23 02:22:38,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:38,317 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 295 transitions. [2021-11-23 02:22:38,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 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) [2021-11-23 02:22:38,317 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 295 transitions. [2021-11-23 02:22:38,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 02:22:38,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:38,319 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] [2021-11-23 02:22:38,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:22:38,319 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:38,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:38,321 INFO L85 PathProgramCache]: Analyzing trace with hash 353118257, now seen corresponding path program 1 times [2021-11-23 02:22:38,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:38,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897700413] [2021-11-23 02:22:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:38,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:38,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:22:38,417 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:38,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897700413] [2021-11-23 02:22:38,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897700413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:38,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:22:38,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:22:38,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188228656] [2021-11-23 02:22:38,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:38,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:22:38,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:38,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:22:38,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:22:38,420 INFO L87 Difference]: Start difference. First operand 238 states and 295 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-11-23 02:22:38,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:22:38,502 INFO L93 Difference]: Finished difference Result 476 states and 611 transitions. [2021-11-23 02:22:38,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:22:38,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 85 [2021-11-23 02:22:38,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:22:38,505 INFO L225 Difference]: With dead ends: 476 [2021-11-23 02:22:38,505 INFO L226 Difference]: Without dead ends: 302 [2021-11-23 02:22:38,506 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 [2021-11-23 02:22:38,507 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 42 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:22:38,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 231 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:22:38,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-23 02:22:38,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 284. [2021-11-23 02:22:38,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.254416961130742) internal successors, (355), 283 states have internal predecessors, (355), 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) [2021-11-23 02:22:38,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 355 transitions. [2021-11-23 02:22:38,552 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 355 transitions. Word has length 85 [2021-11-23 02:22:38,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:38,553 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 355 transitions. [2021-11-23 02:22:38,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-11-23 02:22:38,553 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 355 transitions. [2021-11-23 02:22:38,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 02:22:38,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:38,554 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] [2021-11-23 02:22:38,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:22:38,555 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:38,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:38,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1241787828, now seen corresponding path program 1 times [2021-11-23 02:22:38,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:38,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121786504] [2021-11-23 02:22:38,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:38,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:22:38,625 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:38,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121786504] [2021-11-23 02:22:38,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121786504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:38,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:22:38,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:22:38,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020789383] [2021-11-23 02:22:38,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:38,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:22:38,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:38,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:22:38,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:22:38,628 INFO L87 Difference]: Start difference. First operand 284 states and 355 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:22:38,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:22:38,741 INFO L93 Difference]: Finished difference Result 654 states and 849 transitions. [2021-11-23 02:22:38,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:22:38,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-23 02:22:38,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:22:38,747 INFO L225 Difference]: With dead ends: 654 [2021-11-23 02:22:38,747 INFO L226 Difference]: Without dead ends: 438 [2021-11-23 02:22:38,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:22:38,749 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 37 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:22:38,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 225 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:22:38,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-23 02:22:38,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 412. [2021-11-23 02:22:38,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.2773722627737227) internal successors, (525), 411 states have internal predecessors, (525), 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) [2021-11-23 02:22:38,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 525 transitions. [2021-11-23 02:22:38,816 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 525 transitions. Word has length 88 [2021-11-23 02:22:38,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:38,817 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 525 transitions. [2021-11-23 02:22:38,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:22:38,817 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 525 transitions. [2021-11-23 02:22:38,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 02:22:38,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:38,819 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] [2021-11-23 02:22:38,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:22:38,820 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:38,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:38,821 INFO L85 PathProgramCache]: Analyzing trace with hash 80899168, now seen corresponding path program 1 times [2021-11-23 02:22:38,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:38,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031324181] [2021-11-23 02:22:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:38,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:22:38,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:38,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031324181] [2021-11-23 02:22:38,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031324181] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:38,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:22:38,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:22:38,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611937816] [2021-11-23 02:22:38,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:38,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:22:38,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:38,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:22:38,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:22:38,887 INFO L87 Difference]: Start difference. First operand 412 states and 525 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) [2021-11-23 02:22:39,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:22:39,037 INFO L93 Difference]: Finished difference Result 1056 states and 1383 transitions. [2021-11-23 02:22:39,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:22:39,037 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 [2021-11-23 02:22:39,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:22:39,043 INFO L225 Difference]: With dead ends: 1056 [2021-11-23 02:22:39,043 INFO L226 Difference]: Without dead ends: 712 [2021-11-23 02:22:39,044 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 [2021-11-23 02:22:39,046 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 32 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:22:39,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 218 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:22:39,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-11-23 02:22:39,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 674. [2021-11-23 02:22:39,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 1.2942050520059436) internal successors, (871), 673 states have internal predecessors, (871), 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) [2021-11-23 02:22:39,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 871 transitions. [2021-11-23 02:22:39,175 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 871 transitions. Word has length 91 [2021-11-23 02:22:39,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:39,175 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 871 transitions. [2021-11-23 02:22:39,176 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) [2021-11-23 02:22:39,176 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 871 transitions. [2021-11-23 02:22:39,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 02:22:39,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:39,180 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] [2021-11-23 02:22:39,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:22:39,180 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:39,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:39,181 INFO L85 PathProgramCache]: Analyzing trace with hash -356018612, now seen corresponding path program 1 times [2021-11-23 02:22:39,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:39,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187534618] [2021-11-23 02:22:39,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:39,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:22:39,255 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:39,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187534618] [2021-11-23 02:22:39,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187534618] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:39,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:22:39,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:22:39,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808132772] [2021-11-23 02:22:39,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:39,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:22:39,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:39,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:22:39,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:22:39,258 INFO L87 Difference]: Start difference. First operand 674 states and 871 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) [2021-11-23 02:22:39,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:22:39,508 INFO L93 Difference]: Finished difference Result 1860 states and 2445 transitions. [2021-11-23 02:22:39,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:22:39,509 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 [2021-11-23 02:22:39,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:22:39,518 INFO L225 Difference]: With dead ends: 1860 [2021-11-23 02:22:39,519 INFO L226 Difference]: Without dead ends: 1254 [2021-11-23 02:22:39,521 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 [2021-11-23 02:22:39,522 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 27 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:22:39,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 211 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:22:39,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-11-23 02:22:39,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 1192. [2021-11-23 02:22:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 1.3022670025188916) internal successors, (1551), 1191 states have internal predecessors, (1551), 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) [2021-11-23 02:22:39,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1551 transitions. [2021-11-23 02:22:39,770 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1551 transitions. Word has length 94 [2021-11-23 02:22:39,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:39,770 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 1551 transitions. [2021-11-23 02:22:39,771 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) [2021-11-23 02:22:39,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1551 transitions. [2021-11-23 02:22:39,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 02:22:39,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:39,773 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] [2021-11-23 02:22:39,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:22:39,773 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:39,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:39,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1971522173, now seen corresponding path program 1 times [2021-11-23 02:22:39,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:39,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735925685] [2021-11-23 02:22:39,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:39,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:39,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:22:39,844 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:39,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735925685] [2021-11-23 02:22:39,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735925685] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:39,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:22:39,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:22:39,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250617000] [2021-11-23 02:22:39,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:39,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:22:39,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:39,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:22:39,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:22:39,847 INFO L87 Difference]: Start difference. First operand 1192 states and 1551 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-11-23 02:22:40,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:22:40,318 INFO L93 Difference]: Finished difference Result 3432 states and 4509 transitions. [2021-11-23 02:22:40,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:22:40,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 97 [2021-11-23 02:22:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:22:40,336 INFO L225 Difference]: With dead ends: 3432 [2021-11-23 02:22:40,337 INFO L226 Difference]: Without dead ends: 2308 [2021-11-23 02:22:40,339 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 [2021-11-23 02:22:40,340 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 22 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:22:40,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 200 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:22:40,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-11-23 02:22:40,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2198. [2021-11-23 02:22:40,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2198 states, 2197 states have (on average 1.3031406463359125) internal successors, (2863), 2197 states have internal predecessors, (2863), 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) [2021-11-23 02:22:40,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2198 states to 2198 states and 2863 transitions. [2021-11-23 02:22:40,734 INFO L78 Accepts]: Start accepts. Automaton has 2198 states and 2863 transitions. Word has length 97 [2021-11-23 02:22:40,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:40,735 INFO L470 AbstractCegarLoop]: Abstraction has 2198 states and 2863 transitions. [2021-11-23 02:22:40,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-11-23 02:22:40,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2198 states and 2863 transitions. [2021-11-23 02:22:40,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 02:22:40,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:40,737 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:22:40,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:22:40,738 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:40,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:40,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1949386391, now seen corresponding path program 1 times [2021-11-23 02:22:40,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:40,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563640582] [2021-11-23 02:22:40,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:40,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:26:14,266 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:26:14,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563640582] [2021-11-23 02:26:14,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563640582] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:26:14,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620752807] [2021-11-23 02:26:14,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:14,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:26:14,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d804c4ae-4900-4911-a56a-dc872bd76896/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:26:14,268 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d804c4ae-4900-4911-a56a-dc872bd76896/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:26:14,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d804c4ae-4900-4911-a56a-dc872bd76896/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:26:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:14,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 136 conjunts are in the unsatisfiable core [2021-11-23 02:26:14,810 INFO L286 TraceCheckSpWp]: Computing forward predicates...