./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201d185d-e4e1-44e8-8987-6cf1bbd66e37/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201d185d-e4e1-44e8-8987-6cf1bbd66e37/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201d185d-e4e1-44e8-8987-6cf1bbd66e37/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201d185d-e4e1-44e8-8987-6cf1bbd66e37/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201d185d-e4e1-44e8-8987-6cf1bbd66e37/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201d185d-e4e1-44e8-8987-6cf1bbd66e37/bin/utaipan-TEXQjIfE4P --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 bb7f3b8fa32d5493bfca7086e69548af9d6372d67a054dd07846784fcdf24eca --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:53:54,464 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:53:54,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:53:54,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:53:54,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:53:54,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:53:54,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:53:54,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:53:54,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:53:54,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:53:54,545 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:53:54,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:53:54,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:53:54,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:53:54,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:53:54,554 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:53:54,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:53:54,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:53:54,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:53:54,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:53:54,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:53:54,565 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:53:54,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:53:54,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:53:54,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:53:54,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:53:54,573 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:53:54,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:53:54,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:53:54,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:53:54,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:53:54,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:53:54,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:53:54,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:53:54,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:53:54,581 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:53:54,582 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:53:54,582 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:53:54,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:53:54,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:53:54,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:53:54,586 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201d185d-e4e1-44e8-8987-6cf1bbd66e37/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:53:54,612 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:53:54,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:53:54,613 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:53:54,613 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:53:54,614 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:53:54,614 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:53:54,615 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:53:54,615 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:53:54,615 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:53:54,615 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:53:54,616 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:53:54,616 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:53:54,616 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:53:54,616 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:53:54,617 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:53:54,617 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:53:54,617 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:53:54,617 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:53:54,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:53:54,618 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:53:54,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:53:54,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:53:54,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:53:54,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:53:54,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:53:54,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:53:54,620 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:53:54,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:53:54,621 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:53:54,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:53:54,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:53:54,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:53:54,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:53:54,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:53:54,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:53:54,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:53:54,623 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:53:54,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:53:54,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:53:54,623 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:53:54,624 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:53:54,624 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_201d185d-e4e1-44e8-8987-6cf1bbd66e37/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201d185d-e4e1-44e8-8987-6cf1bbd66e37/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb7f3b8fa32d5493bfca7086e69548af9d6372d67a054dd07846784fcdf24eca [2021-11-20 23:53:54,873 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:53:54,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:53:54,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:53:54,901 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:53:54,901 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:53:54,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201d185d-e4e1-44e8-8987-6cf1bbd66e37/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-20 23:53:54,981 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201d185d-e4e1-44e8-8987-6cf1bbd66e37/bin/utaipan-TEXQjIfE4P/data/66a1b5013/c3df6880176d4aaaba508aacbbd1dd67/FLAG432c19f06 [2021-11-20 23:53:55,525 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:53:55,532 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201d185d-e4e1-44e8-8987-6cf1bbd66e37/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-20 23:53:55,544 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201d185d-e4e1-44e8-8987-6cf1bbd66e37/bin/utaipan-TEXQjIfE4P/data/66a1b5013/c3df6880176d4aaaba508aacbbd1dd67/FLAG432c19f06 [2021-11-20 23:53:55,848 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201d185d-e4e1-44e8-8987-6cf1bbd66e37/bin/utaipan-TEXQjIfE4P/data/66a1b5013/c3df6880176d4aaaba508aacbbd1dd67 [2021-11-20 23:53:55,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:53:55,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:53:55,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:53:55,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:53:55,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:53:55,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:53:55" (1/1) ... [2021-11-20 23:53:55,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6de72103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:55, skipping insertion in model container [2021-11-20 23:53:55,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:53:55" (1/1) ... [2021-11-20 23:53:55,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:53:55,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:53:56,247 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_201d185d-e4e1-44e8-8987-6cf1bbd66e37/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[9241,9254] [2021-11-20 23:53:56,314 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:53:56,329 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:53:56,411 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_201d185d-e4e1-44e8-8987-6cf1bbd66e37/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[9241,9254] [2021-11-20 23:53:56,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:53:56,525 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:53:56,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:56 WrapperNode [2021-11-20 23:53:56,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:53:56,527 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:53:56,527 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:53:56,527 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:53:56,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:56" (1/1) ... [2021-11-20 23:53:56,558 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:56" (1/1) ... [2021-11-20 23:53:56,618 INFO L137 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 742 [2021-11-20 23:53:56,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:53:56,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:53:56,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:53:56,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:53:56,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:56" (1/1) ... [2021-11-20 23:53:56,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:56" (1/1) ... [2021-11-20 23:53:56,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:56" (1/1) ... [2021-11-20 23:53:56,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:56" (1/1) ... [2021-11-20 23:53:56,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:56" (1/1) ... [2021-11-20 23:53:56,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:56" (1/1) ... [2021-11-20 23:53:56,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:56" (1/1) ... [2021-11-20 23:53:56,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:53:56,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:53:56,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:53:56,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:53:56,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:56" (1/1) ... [2021-11-20 23:53:56,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:53:56,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201d185d-e4e1-44e8-8987-6cf1bbd66e37/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:53:56,716 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201d185d-e4e1-44e8-8987-6cf1bbd66e37/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:53:56,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201d185d-e4e1-44e8-8987-6cf1bbd66e37/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:53:56,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:53:56,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:53:56,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:53:56,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:53:56,886 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:53:56,888 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:53:57,525 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:53:57,687 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:53:57,687 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 23:53:57,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:53:57 BoogieIcfgContainer [2021-11-20 23:53:57,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:53:57,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:53:57,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:53:57,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:53:57,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:53:55" (1/3) ... [2021-11-20 23:53:57,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f92d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:53:57, skipping insertion in model container [2021-11-20 23:53:57,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:53:56" (2/3) ... [2021-11-20 23:53:57,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f92d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:53:57, skipping insertion in model container [2021-11-20 23:53:57,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:53:57" (3/3) ... [2021-11-20 23:53:57,698 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-20 23:53:57,703 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:53:57,703 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:53:57,754 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:53:57,761 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 [2021-11-20 23:53:57,761 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:53:57,780 INFO L276 IsEmpty]: Start isEmpty. Operand has 127 states, 125 states have (on average 1.768) internal successors, (221), 126 states have internal predecessors, (221), 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) [2021-11-20 23:53:57,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-20 23:53:57,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:53:57,790 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:53:57,791 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:53:57,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:53:57,797 INFO L85 PathProgramCache]: Analyzing trace with hash -854246578, now seen corresponding path program 1 times [2021-11-20 23:53:57,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:53:57,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141095920] [2021-11-20 23:53:57,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:53:57,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:53:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:53:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:53:58,225 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:53:58,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141095920] [2021-11-20 23:53:58,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141095920] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:53:58,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:53:58,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:53:58,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868148690] [2021-11-20 23:53:58,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:53:58,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:53:58,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:53:58,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:53:58,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:53:58,275 INFO L87 Difference]: Start difference. First operand has 127 states, 125 states have (on average 1.768) internal successors, (221), 126 states have internal predecessors, (221), 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 15.6) internal successors, (78), 4 states have internal predecessors, (78), 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) [2021-11-20 23:53:58,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:53:58,566 INFO L93 Difference]: Finished difference Result 212 states and 353 transitions. [2021-11-20 23:53:58,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:53:58,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 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 78 [2021-11-20 23:53:58,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:53:58,581 INFO L225 Difference]: With dead ends: 212 [2021-11-20 23:53:58,581 INFO L226 Difference]: Without dead ends: 125 [2021-11-20 23:53:58,584 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 [2021-11-20 23:53:58,588 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 592 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:53:58,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 137 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:53:58,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-20 23:53:58,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-20 23:53:58,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.2096774193548387) internal successors, (150), 124 states have internal predecessors, (150), 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) [2021-11-20 23:53:58,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 150 transitions. [2021-11-20 23:53:58,647 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 150 transitions. Word has length 78 [2021-11-20 23:53:58,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:53:58,649 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 150 transitions. [2021-11-20 23:53:58,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 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) [2021-11-20 23:53:58,650 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 150 transitions. [2021-11-20 23:53:58,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 23:53:58,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:53:58,655 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:53:58,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:53:58,656 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:53:58,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:53:58,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1933161071, now seen corresponding path program 1 times [2021-11-20 23:53:58,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:53:58,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744940306] [2021-11-20 23:53:58,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:53:58,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:53:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:53:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:53:58,885 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:53:58,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744940306] [2021-11-20 23:53:58,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744940306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:53:58,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:53:58,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:53:58,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363806154] [2021-11-20 23:53:58,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:53:58,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:53:58,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:53:58,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:53:58,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:53:58,892 INFO L87 Difference]: Start difference. First operand 125 states and 150 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 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) [2021-11-20 23:53:59,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:53:59,053 INFO L93 Difference]: Finished difference Result 188 states and 234 transitions. [2021-11-20 23:53:59,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:53:59,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 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 79 [2021-11-20 23:53:59,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:53:59,059 INFO L225 Difference]: With dead ends: 188 [2021-11-20 23:53:59,059 INFO L226 Difference]: Without dead ends: 125 [2021-11-20 23:53:59,064 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 [2021-11-20 23:53:59,066 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 343 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:53:59,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 110 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:53:59,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-20 23:53:59,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-20 23:53:59,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 124 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:53:59,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2021-11-20 23:53:59,093 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 79 [2021-11-20 23:53:59,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:53:59,098 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2021-11-20 23:53:59,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 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) [2021-11-20 23:53:59,099 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2021-11-20 23:53:59,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-20 23:53:59,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:53:59,107 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:53:59,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:53:59,108 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:53:59,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:53:59,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1685981038, now seen corresponding path program 1 times [2021-11-20 23:53:59,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:53:59,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723258687] [2021-11-20 23:53:59,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:53:59,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:53:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:53:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:53:59,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:53:59,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723258687] [2021-11-20 23:53:59,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723258687] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:53:59,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:53:59,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:53:59,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450504442] [2021-11-20 23:53:59,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:53:59,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:53:59,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:53:59,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:53:59,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:53:59,239 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2021-11-20 23:53:59,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:53:59,385 INFO L93 Difference]: Finished difference Result 196 states and 240 transitions. [2021-11-20 23:53:59,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:53:59,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 80 [2021-11-20 23:53:59,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:53:59,389 INFO L225 Difference]: With dead ends: 196 [2021-11-20 23:53:59,389 INFO L226 Difference]: Without dead ends: 125 [2021-11-20 23:53:59,390 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 [2021-11-20 23:53:59,397 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 359 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:53:59,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 94 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:53:59,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-20 23:53:59,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-20 23:53:59,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1774193548387097) internal successors, (146), 124 states have internal predecessors, (146), 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) [2021-11-20 23:53:59,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2021-11-20 23:53:59,415 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 80 [2021-11-20 23:53:59,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:53:59,419 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2021-11-20 23:53:59,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2021-11-20 23:53:59,420 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2021-11-20 23:53:59,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-20 23:53:59,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:53:59,422 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:53:59,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:53:59,422 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:53:59,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:53:59,424 INFO L85 PathProgramCache]: Analyzing trace with hash -33024433, now seen corresponding path program 1 times [2021-11-20 23:53:59,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:53:59,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127683829] [2021-11-20 23:53:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:53:59,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:53:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:53:59,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:53:59,588 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:53:59,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127683829] [2021-11-20 23:53:59,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127683829] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:53:59,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:53:59,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:53:59,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818341192] [2021-11-20 23:53:59,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:53:59,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:53:59,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:53:59,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:53:59,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:53:59,592 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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) [2021-11-20 23:53:59,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:53:59,718 INFO L93 Difference]: Finished difference Result 192 states and 232 transitions. [2021-11-20 23:53:59,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:53:59,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 81 [2021-11-20 23:53:59,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:53:59,722 INFO L225 Difference]: With dead ends: 192 [2021-11-20 23:53:59,722 INFO L226 Difference]: Without dead ends: 125 [2021-11-20 23:53:59,725 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 [2021-11-20 23:53:59,732 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 341 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:53:59,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 102 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:53:59,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-20 23:53:59,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-20 23:53:59,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 124 states have internal predecessors, (144), 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) [2021-11-20 23:53:59,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2021-11-20 23:53:59,751 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 81 [2021-11-20 23:53:59,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:53:59,752 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2021-11-20 23:53:59,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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) [2021-11-20 23:53:59,752 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2021-11-20 23:53:59,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-20 23:53:59,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:53:59,753 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:53:59,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:53:59,754 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:53:59,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:53:59,754 INFO L85 PathProgramCache]: Analyzing trace with hash 730896410, now seen corresponding path program 1 times [2021-11-20 23:53:59,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:53:59,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751054824] [2021-11-20 23:53:59,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:53:59,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:53:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:53:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:53:59,881 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:53:59,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751054824] [2021-11-20 23:53:59,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751054824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:53:59,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:53:59,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:53:59,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175633338] [2021-11-20 23:53:59,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:53:59,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:53:59,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:53:59,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:53:59,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:53:59,884 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:54:00,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:54:00,024 INFO L93 Difference]: Finished difference Result 200 states and 237 transitions. [2021-11-20 23:54:00,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:54:00,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-20 23:54:00,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:54:00,026 INFO L225 Difference]: With dead ends: 200 [2021-11-20 23:54:00,026 INFO L226 Difference]: Without dead ends: 125 [2021-11-20 23:54:00,026 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 [2021-11-20 23:54:00,027 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 358 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:54:00,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 86 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:54:00,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-20 23:54:00,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-20 23:54:00,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1451612903225807) internal successors, (142), 124 states have internal predecessors, (142), 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) [2021-11-20 23:54:00,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 142 transitions. [2021-11-20 23:54:00,040 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 142 transitions. Word has length 82 [2021-11-20 23:54:00,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:54:00,040 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 142 transitions. [2021-11-20 23:54:00,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:54:00,040 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 142 transitions. [2021-11-20 23:54:00,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-20 23:54:00,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:00,042 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:54:00,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:54:00,042 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:54:00,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:00,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1987887175, now seen corresponding path program 1 times [2021-11-20 23:54:00,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:00,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735357300] [2021-11-20 23:54:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:00,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:54:00,123 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:54:00,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735357300] [2021-11-20 23:54:00,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735357300] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:54:00,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:54:00,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:54:00,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221305454] [2021-11-20 23:54:00,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:54:00,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:54:00,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:54:00,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:54:00,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:54:00,126 INFO L87 Difference]: Start difference. First operand 125 states and 142 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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) [2021-11-20 23:54:00,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:54:00,232 INFO L93 Difference]: Finished difference Result 184 states and 217 transitions. [2021-11-20 23:54:00,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:54:00,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 83 [2021-11-20 23:54:00,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:54:00,234 INFO L225 Difference]: With dead ends: 184 [2021-11-20 23:54:00,234 INFO L226 Difference]: Without dead ends: 125 [2021-11-20 23:54:00,235 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 [2021-11-20 23:54:00,237 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 304 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:54:00,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 118 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:54:00,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-20 23:54:00,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-20 23:54:00,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1290322580645162) internal successors, (140), 124 states have internal predecessors, (140), 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) [2021-11-20 23:54:00,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 140 transitions. [2021-11-20 23:54:00,252 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 140 transitions. Word has length 83 [2021-11-20 23:54:00,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:54:00,253 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 140 transitions. [2021-11-20 23:54:00,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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) [2021-11-20 23:54:00,253 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 140 transitions. [2021-11-20 23:54:00,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-20 23:54:00,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:00,254 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:54:00,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:54:00,255 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:54:00,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:00,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1480366454, now seen corresponding path program 1 times [2021-11-20 23:54:00,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:00,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776005720] [2021-11-20 23:54:00,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:00,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:54:09,509 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:54:09,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776005720] [2021-11-20 23:54:09,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776005720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:54:09,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:54:09,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-11-20 23:54:09,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960442937] [2021-11-20 23:54:09,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:54:09,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-20 23:54:09,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:54:09,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-20 23:54:09,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1415, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 23:54:09,512 INFO L87 Difference]: Start difference. First operand 125 states and 140 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 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) [2021-11-20 23:54:22,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:54:22,243 INFO L93 Difference]: Finished difference Result 303 states and 374 transitions. [2021-11-20 23:54:22,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-20 23:54:22,244 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 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 84 [2021-11-20 23:54:22,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:54:22,247 INFO L225 Difference]: With dead ends: 303 [2021-11-20 23:54:22,247 INFO L226 Difference]: Without dead ends: 257 [2021-11-20 23:54:22,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=1148, Invalid=3964, Unknown=0, NotChecked=0, Total=5112 [2021-11-20 23:54:22,250 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 1347 mSDsluCounter, 1392 mSDsCounter, 0 mSdLazyCounter, 2906 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1347 SdHoareTripleChecker+Valid, 1469 SdHoareTripleChecker+Invalid, 3007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:54:22,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1347 Valid, 1469 Invalid, 3007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2906 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-20 23:54:22,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-20 23:54:22,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 166. [2021-11-20 23:54:22,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.1757575757575758) internal successors, (194), 165 states have internal predecessors, (194), 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) [2021-11-20 23:54:22,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 194 transitions. [2021-11-20 23:54:22,274 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 194 transitions. Word has length 84 [2021-11-20 23:54:22,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:54:22,275 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 194 transitions. [2021-11-20 23:54:22,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 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) [2021-11-20 23:54:22,275 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 194 transitions. [2021-11-20 23:54:22,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-20 23:54:22,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:22,276 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:54:22,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:54:22,277 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:54:22,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:22,277 INFO L85 PathProgramCache]: Analyzing trace with hash 242662638, now seen corresponding path program 1 times [2021-11-20 23:54:22,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:22,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412348692] [2021-11-20 23:54:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:22,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:33,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:54:33,470 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:54:33,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412348692] [2021-11-20 23:54:33,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412348692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:54:33,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:54:33,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-11-20 23:54:33,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225037903] [2021-11-20 23:54:33,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:54:33,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-20 23:54:33,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:54:33,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-20 23:54:33,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1805, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 23:54:33,473 INFO L87 Difference]: Start difference. First operand 166 states and 194 transitions. Second operand has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 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) [2021-11-20 23:54:51,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:54:51,803 INFO L93 Difference]: Finished difference Result 299 states and 369 transitions. [2021-11-20 23:54:51,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-20 23:54:51,803 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 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 86 [2021-11-20 23:54:51,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:54:51,805 INFO L225 Difference]: With dead ends: 299 [2021-11-20 23:54:51,805 INFO L226 Difference]: Without dead ends: 212 [2021-11-20 23:54:51,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=1439, Invalid=4723, Unknown=0, NotChecked=0, Total=6162 [2021-11-20 23:54:51,809 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 892 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 2264 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 2336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:54:51,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [892 Valid, 1189 Invalid, 2336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2264 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 23:54:51,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-20 23:54:51,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 210. [2021-11-20 23:54:51,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.2057416267942584) internal successors, (252), 209 states have internal predecessors, (252), 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) [2021-11-20 23:54:51,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 252 transitions. [2021-11-20 23:54:51,846 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 252 transitions. Word has length 86 [2021-11-20 23:54:51,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:54:51,847 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 252 transitions. [2021-11-20 23:54:51,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 44 states have internal predecessors, (86), 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) [2021-11-20 23:54:51,847 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 252 transitions. [2021-11-20 23:54:51,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-20 23:54:51,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:51,848 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:54:51,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:54:51,849 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:54:51,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:51,849 INFO L85 PathProgramCache]: Analyzing trace with hash 13569848, now seen corresponding path program 1 times [2021-11-20 23:54:51,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:51,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141462131] [2021-11-20 23:54:51,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:51,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:54:51,951 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:54:51,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141462131] [2021-11-20 23:54:51,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141462131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:54:51,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:54:51,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:54:51,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453089359] [2021-11-20 23:54:51,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:54:51,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:54:51,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:54:51,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:54:51,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:54:51,953 INFO L87 Difference]: Start difference. First operand 210 states and 252 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2021-11-20 23:54:52,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:54:52,055 INFO L93 Difference]: Finished difference Result 471 states and 597 transitions. [2021-11-20 23:54:52,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:54:52,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2021-11-20 23:54:52,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:54:52,058 INFO L225 Difference]: With dead ends: 471 [2021-11-20 23:54:52,058 INFO L226 Difference]: Without dead ends: 340 [2021-11-20 23:54:52,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:54:52,059 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 128 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:54:52,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 303 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:54:52,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-20 23:54:52,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 338. [2021-11-20 23:54:52,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 1.2492581602373887) internal successors, (421), 337 states have internal predecessors, (421), 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) [2021-11-20 23:54:52,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 421 transitions. [2021-11-20 23:54:52,118 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 421 transitions. Word has length 86 [2021-11-20 23:54:52,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:54:52,118 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 421 transitions. [2021-11-20 23:54:52,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2021-11-20 23:54:52,119 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 421 transitions. [2021-11-20 23:54:52,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-20 23:54:52,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:52,120 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:54:52,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:54:52,120 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:54:52,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:52,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1055270479, now seen corresponding path program 1 times [2021-11-20 23:54:52,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:52,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265252447] [2021-11-20 23:54:52,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:52,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:54:52,194 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:54:52,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265252447] [2021-11-20 23:54:52,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265252447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:54:52,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:54:52,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:54:52,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008938372] [2021-11-20 23:54:52,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:54:52,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:54:52,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:54:52,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:54:52,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:54:52,197 INFO L87 Difference]: Start difference. First operand 338 states and 421 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 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) [2021-11-20 23:54:52,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:54:52,437 INFO L93 Difference]: Finished difference Result 661 states and 846 transitions. [2021-11-20 23:54:52,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:54:52,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 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 87 [2021-11-20 23:54:52,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:54:52,441 INFO L225 Difference]: With dead ends: 661 [2021-11-20 23:54:52,442 INFO L226 Difference]: Without dead ends: 530 [2021-11-20 23:54:52,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:54:52,443 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 289 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:54:52,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 719 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:54:52,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-20 23:54:52,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 293. [2021-11-20 23:54:52,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.2328767123287672) internal successors, (360), 292 states have internal predecessors, (360), 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) [2021-11-20 23:54:52,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 360 transitions. [2021-11-20 23:54:52,495 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 360 transitions. Word has length 87 [2021-11-20 23:54:52,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:54:52,495 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 360 transitions. [2021-11-20 23:54:52,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 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) [2021-11-20 23:54:52,496 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 360 transitions. [2021-11-20 23:54:52,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-20 23:54:52,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:52,497 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:54:52,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 23:54:52,498 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:54:52,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:52,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1948428546, now seen corresponding path program 1 times [2021-11-20 23:54:52,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:52,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507419818] [2021-11-20 23:54:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:52,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:52,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:54:52,583 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:54:52,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507419818] [2021-11-20 23:54:52,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507419818] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:54:52,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:54:52,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:54:52,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602926960] [2021-11-20 23:54:52,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:54:52,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:54:52,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:54:52,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:54:52,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:54:52,586 INFO L87 Difference]: Start difference. First operand 293 states and 360 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:54:52,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:54:52,681 INFO L93 Difference]: Finished difference Result 582 states and 739 transitions. [2021-11-20 23:54:52,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:54:52,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-20 23:54:52,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:54:52,685 INFO L225 Difference]: With dead ends: 582 [2021-11-20 23:54:52,685 INFO L226 Difference]: Without dead ends: 368 [2021-11-20 23:54:52,686 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 [2021-11-20 23:54:52,687 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 51 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 286 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 [2021-11-20 23:54:52,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 286 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:54:52,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-20 23:54:52,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 350. [2021-11-20 23:54:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.2406876790830945) internal successors, (433), 349 states have internal predecessors, (433), 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) [2021-11-20 23:54:52,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 433 transitions. [2021-11-20 23:54:52,746 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 433 transitions. Word has length 104 [2021-11-20 23:54:52,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:54:52,746 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 433 transitions. [2021-11-20 23:54:52,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:54:52,747 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 433 transitions. [2021-11-20 23:54:52,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-20 23:54:52,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:52,748 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:54:52,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 23:54:52,749 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:54:52,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:52,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1390352533, now seen corresponding path program 1 times [2021-11-20 23:54:52,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:52,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032128260] [2021-11-20 23:54:52,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:52,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:54:52,822 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:54:52,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032128260] [2021-11-20 23:54:52,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032128260] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:54:52,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:54:52,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:54:52,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157611472] [2021-11-20 23:54:52,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:54:52,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:54:52,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:54:52,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:54:52,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:54:52,825 INFO L87 Difference]: Start difference. First operand 350 states and 433 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-11-20 23:54:52,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:54:52,946 INFO L93 Difference]: Finished difference Result 801 states and 1026 transitions. [2021-11-20 23:54:52,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:54:52,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 107 [2021-11-20 23:54:52,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:54:52,950 INFO L225 Difference]: With dead ends: 801 [2021-11-20 23:54:52,951 INFO L226 Difference]: Without dead ends: 534 [2021-11-20 23:54:52,952 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 [2021-11-20 23:54:52,953 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 46 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:54:52,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 279 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:54:52,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-20 23:54:53,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 508. [2021-11-20 23:54:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 1.2603550295857988) internal successors, (639), 507 states have internal predecessors, (639), 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) [2021-11-20 23:54:53,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 639 transitions. [2021-11-20 23:54:53,033 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 639 transitions. Word has length 107 [2021-11-20 23:54:53,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:54:53,034 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 639 transitions. [2021-11-20 23:54:53,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-11-20 23:54:53,034 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 639 transitions. [2021-11-20 23:54:53,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-20 23:54:53,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:53,036 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:54:53,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 23:54:53,036 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:54:53,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:53,037 INFO L85 PathProgramCache]: Analyzing trace with hash 551817665, now seen corresponding path program 1 times [2021-11-20 23:54:53,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:53,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963554529] [2021-11-20 23:54:53,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:53,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:54:53,113 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:54:53,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963554529] [2021-11-20 23:54:53,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963554529] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:54:53,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:54:53,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:54:53,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379240829] [2021-11-20 23:54:53,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:54:53,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:54:53,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:54:53,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:54:53,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:54:53,115 INFO L87 Difference]: Start difference. First operand 508 states and 639 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:54:53,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:54:53,289 INFO L93 Difference]: Finished difference Result 1293 states and 1668 transitions. [2021-11-20 23:54:53,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:54:53,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-20 23:54:53,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:54:53,295 INFO L225 Difference]: With dead ends: 1293 [2021-11-20 23:54:53,295 INFO L226 Difference]: Without dead ends: 868 [2021-11-20 23:54:53,296 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 [2021-11-20 23:54:53,297 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 41 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:54:53,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 272 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:54:53,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-11-20 23:54:53,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 830. [2021-11-20 23:54:53,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 1.2750301568154403) internal successors, (1057), 829 states have internal predecessors, (1057), 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) [2021-11-20 23:54:53,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1057 transitions. [2021-11-20 23:54:53,443 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1057 transitions. Word has length 110 [2021-11-20 23:54:53,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:54:53,444 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 1057 transitions. [2021-11-20 23:54:53,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:54:53,444 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1057 transitions. [2021-11-20 23:54:53,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 23:54:53,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:53,448 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:54:53,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 23:54:53,448 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:54:53,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:53,449 INFO L85 PathProgramCache]: Analyzing trace with hash -769486073, now seen corresponding path program 1 times [2021-11-20 23:54:53,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:53,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397533981] [2021-11-20 23:54:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:53,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:54:53,513 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:54:53,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397533981] [2021-11-20 23:54:53,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397533981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:54:53,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:54:53,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:54:53,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193742556] [2021-11-20 23:54:53,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:54:53,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:54:53,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:54:53,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:54:53,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:54:53,517 INFO L87 Difference]: Start difference. First operand 830 states and 1057 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:54:53,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:54:53,811 INFO L93 Difference]: Finished difference Result 2277 states and 2946 transitions. [2021-11-20 23:54:53,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:54:53,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-20 23:54:53,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:54:53,820 INFO L225 Difference]: With dead ends: 2277 [2021-11-20 23:54:53,820 INFO L226 Difference]: Without dead ends: 1530 [2021-11-20 23:54:53,822 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 [2021-11-20 23:54:53,823 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 36 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:54:53,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 265 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:54:53,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-11-20 23:54:54,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1468. [2021-11-20 23:54:54,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 1.2822085889570551) internal successors, (1881), 1467 states have internal predecessors, (1881), 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) [2021-11-20 23:54:54,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 1881 transitions. [2021-11-20 23:54:54,068 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 1881 transitions. Word has length 113 [2021-11-20 23:54:54,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:54:54,068 INFO L470 AbstractCegarLoop]: Abstraction has 1468 states and 1881 transitions. [2021-11-20 23:54:54,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:54:54,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 1881 transitions. [2021-11-20 23:54:54,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 23:54:54,070 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:54,070 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:54:54,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 23:54:54,071 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:54:54,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:54,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1915647302, now seen corresponding path program 1 times [2021-11-20 23:54:54,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:54,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52980818] [2021-11-20 23:54:54,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:54,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:54:54,140 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:54:54,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52980818] [2021-11-20 23:54:54,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52980818] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:54:54,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:54:54,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:54:54,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106476472] [2021-11-20 23:54:54,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:54:54,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:54:54,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:54:54,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:54:54,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:54:54,143 INFO L87 Difference]: Start difference. First operand 1468 states and 1881 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2021-11-20 23:54:54,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:54:54,654 INFO L93 Difference]: Finished difference Result 4209 states and 5442 transitions. [2021-11-20 23:54:54,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:54:54,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 116 [2021-11-20 23:54:54,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:54:54,670 INFO L225 Difference]: With dead ends: 4209 [2021-11-20 23:54:54,670 INFO L226 Difference]: Without dead ends: 2824 [2021-11-20 23:54:54,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:54:54,675 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 31 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:54:54,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 258 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:54:54,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2021-11-20 23:54:55,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2714. [2021-11-20 23:54:55,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 2713 states have (on average 1.2830814596387763) internal successors, (3481), 2713 states have internal predecessors, (3481), 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) [2021-11-20 23:54:55,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 3481 transitions. [2021-11-20 23:54:55,147 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 3481 transitions. Word has length 116 [2021-11-20 23:54:55,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:54:55,147 INFO L470 AbstractCegarLoop]: Abstraction has 2714 states and 3481 transitions. [2021-11-20 23:54:55,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2021-11-20 23:54:55,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 3481 transitions. [2021-11-20 23:54:55,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 23:54:55,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:55,149 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:54:55,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 23:54:55,150 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:54:55,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:55,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1779056212, now seen corresponding path program 1 times [2021-11-20 23:54:55,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:55,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121966672] [2021-11-20 23:54:55,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:55,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:55,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:54:55,212 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:54:55,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121966672] [2021-11-20 23:54:55,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121966672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:54:55,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:54:55,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:54:55,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395819965] [2021-11-20 23:54:55,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:54:55,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:54:55,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:54:55,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:54:55,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:54:55,216 INFO L87 Difference]: Start difference. First operand 2714 states and 3481 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 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) [2021-11-20 23:54:56,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:54:56,141 INFO L93 Difference]: Finished difference Result 7965 states and 10266 transitions. [2021-11-20 23:54:56,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:54:56,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-20 23:54:56,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:54:56,172 INFO L225 Difference]: With dead ends: 7965 [2021-11-20 23:54:56,172 INFO L226 Difference]: Without dead ends: 5334 [2021-11-20 23:54:56,178 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 [2021-11-20 23:54:56,179 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 26 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:54:56,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 247 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:54:56,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2021-11-20 23:54:56,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 5128. [2021-11-20 23:54:56,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5128 states, 5127 states have (on average 1.2796957284961965) internal successors, (6561), 5127 states have internal predecessors, (6561), 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) [2021-11-20 23:54:56,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5128 states to 5128 states and 6561 transitions. [2021-11-20 23:54:56,894 INFO L78 Accepts]: Start accepts. Automaton has 5128 states and 6561 transitions. Word has length 119 [2021-11-20 23:54:56,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:54:56,895 INFO L470 AbstractCegarLoop]: Abstraction has 5128 states and 6561 transitions. [2021-11-20 23:54:56,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 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) [2021-11-20 23:54:56,895 INFO L276 IsEmpty]: Start isEmpty. Operand 5128 states and 6561 transitions. [2021-11-20 23:54:56,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-20 23:54:56,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:56,897 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:54:56,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 23:54:56,898 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:54:56,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:56,899 INFO L85 PathProgramCache]: Analyzing trace with hash -2059822941, now seen corresponding path program 1 times [2021-11-20 23:54:56,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:56,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701280192] [2021-11-20 23:54:56,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:56,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:57,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:58:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:58:40,156 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:58:40,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701280192] [2021-11-20 23:58:40,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701280192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:58:40,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843801372] [2021-11-20 23:58:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:58:40,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:58:40,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201d185d-e4e1-44e8-8987-6cf1bbd66e37/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:58:40,158 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201d185d-e4e1-44e8-8987-6cf1bbd66e37/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:58:40,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_201d185d-e4e1-44e8-8987-6cf1bbd66e37/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:58:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:58:40,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 160 conjunts are in the unsatisfiable core [2021-11-20 23:58:40,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:01:47,610 WARN L227 SmtUtils]: Spent 8.63s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)