./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.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_e6126ac6-a267-4c30-8ad3-d9bdb59b5079/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6126ac6-a267-4c30-8ad3-d9bdb59b5079/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_e6126ac6-a267-4c30-8ad3-d9bdb59b5079/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6126ac6-a267-4c30-8ad3-d9bdb59b5079/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6126ac6-a267-4c30-8ad3-d9bdb59b5079/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_e6126ac6-a267-4c30-8ad3-d9bdb59b5079/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 3f65c5712bd883a6886a8bc01d4e0133fd034d0de7d6cdf4a43830b50c44bd44 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:09:10,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:09:10,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:09:10,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:09:10,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:09:10,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:09:10,646 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:09:10,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:09:10,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:09:10,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:09:10,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:09:10,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:09:10,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:09:10,663 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:09:10,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:09:10,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:09:10,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:09:10,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:09:10,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:09:10,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:09:10,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:09:10,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:09:10,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:09:10,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:09:10,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:09:10,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:09:10,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:09:10,707 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:09:10,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:09:10,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:09:10,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:09:10,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:09:10,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:09:10,714 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:09:10,716 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:09:10,716 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:09:10,717 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:09:10,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:09:10,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:09:10,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:09:10,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:09:10,720 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6126ac6-a267-4c30-8ad3-d9bdb59b5079/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:09:10,764 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:09:10,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:09:10,764 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:09:10,764 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:09:10,765 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:09:10,765 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:09:10,765 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:09:10,766 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:09:10,766 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:09:10,766 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:09:10,766 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:09:10,766 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:09:10,767 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:09:10,767 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:09:10,767 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:09:10,767 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:09:10,767 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:09:10,767 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:09:10,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:09:10,768 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:09:10,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:09:10,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:09:10,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:09:10,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:09:10,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:09:10,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:09:10,770 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:09:10,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:09:10,775 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:09:10,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:09:10,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:09:10,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:09:10,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:09:10,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:09:10,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:09:10,776 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:09:10,777 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:09:10,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:09:10,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:09:10,778 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:09:10,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:09:10,778 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_e6126ac6-a267-4c30-8ad3-d9bdb59b5079/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6126ac6-a267-4c30-8ad3-d9bdb59b5079/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f65c5712bd883a6886a8bc01d4e0133fd034d0de7d6cdf4a43830b50c44bd44 [2021-11-21 01:09:11,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:09:11,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:09:11,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:09:11,108 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:09:11,109 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:09:11,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6126ac6-a267-4c30-8ad3-d9bdb59b5079/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-21 01:09:11,182 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6126ac6-a267-4c30-8ad3-d9bdb59b5079/bin/utaipan-TEXQjIfE4P/data/f386175d0/b6237ac66bb44d6a8f12f404ec8313dd/FLAGc991d54db [2021-11-21 01:09:11,789 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:09:11,789 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6126ac6-a267-4c30-8ad3-d9bdb59b5079/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-21 01:09:11,817 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6126ac6-a267-4c30-8ad3-d9bdb59b5079/bin/utaipan-TEXQjIfE4P/data/f386175d0/b6237ac66bb44d6a8f12f404ec8313dd/FLAGc991d54db [2021-11-21 01:09:12,057 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6126ac6-a267-4c30-8ad3-d9bdb59b5079/bin/utaipan-TEXQjIfE4P/data/f386175d0/b6237ac66bb44d6a8f12f404ec8313dd [2021-11-21 01:09:12,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:09:12,061 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:09:12,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:09:12,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:09:12,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:09:12,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:09:12" (1/1) ... [2021-11-21 01:09:12,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40bf0ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:12, skipping insertion in model container [2021-11-21 01:09:12,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:09:12" (1/1) ... [2021-11-21 01:09:12,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:09:12,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:09:12,537 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_e6126ac6-a267-4c30-8ad3-d9bdb59b5079/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[14417,14430] [2021-11-21 01:09:12,617 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:09:12,629 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:09:12,754 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_e6126ac6-a267-4c30-8ad3-d9bdb59b5079/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[14417,14430] [2021-11-21 01:09:12,821 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:09:12,839 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:09:12,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:12 WrapperNode [2021-11-21 01:09:12,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:09:12,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:09:12,841 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:09:12,841 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:09:12,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:12" (1/1) ... [2021-11-21 01:09:12,882 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:12" (1/1) ... [2021-11-21 01:09:12,958 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1181 [2021-11-21 01:09:12,958 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:09:12,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:09:12,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:09:12,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:09:12,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:12" (1/1) ... [2021-11-21 01:09:12,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:12" (1/1) ... [2021-11-21 01:09:12,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:12" (1/1) ... [2021-11-21 01:09:12,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:12" (1/1) ... [2021-11-21 01:09:13,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:12" (1/1) ... [2021-11-21 01:09:13,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:12" (1/1) ... [2021-11-21 01:09:13,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:12" (1/1) ... [2021-11-21 01:09:13,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:09:13,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:09:13,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:09:13,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:09:13,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:12" (1/1) ... [2021-11-21 01:09:13,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:09:13,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6126ac6-a267-4c30-8ad3-d9bdb59b5079/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:09:13,106 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6126ac6-a267-4c30-8ad3-d9bdb59b5079/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:09:13,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6126ac6-a267-4c30-8ad3-d9bdb59b5079/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:09:13,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:09:13,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:09:13,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:09:13,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:09:13,315 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:09:13,316 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:09:14,429 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:09:14,780 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:09:14,781 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 01:09:14,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:09:14 BoogieIcfgContainer [2021-11-21 01:09:14,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:09:14,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:09:14,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:09:14,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:09:14,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:09:12" (1/3) ... [2021-11-21 01:09:14,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f34eab4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:09:14, skipping insertion in model container [2021-11-21 01:09:14,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:09:12" (2/3) ... [2021-11-21 01:09:14,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f34eab4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:09:14, skipping insertion in model container [2021-11-21 01:09:14,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:09:14" (3/3) ... [2021-11-21 01:09:14,801 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-21 01:09:14,807 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:09:14,808 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:09:14,881 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:09:14,889 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 [2021-11-21 01:09:14,889 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:09:14,924 INFO L276 IsEmpty]: Start isEmpty. Operand has 227 states, 225 states have (on average 1.7644444444444445) internal successors, (397), 226 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:14,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-21 01:09:14,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:09:14,947 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:09:14,948 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:09:14,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:09:14,953 INFO L85 PathProgramCache]: Analyzing trace with hash -614299169, now seen corresponding path program 1 times [2021-11-21 01:09:14,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:09:14,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872993053] [2021-11-21 01:09:14,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:09:14,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:09:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:09:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:09:15,923 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:09:15,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872993053] [2021-11-21 01:09:15,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872993053] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:09:15,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:09:15,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:09:15,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269320779] [2021-11-21 01:09:15,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:09:15,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:09:15,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:09:15,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:09:15,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:09:15,984 INFO L87 Difference]: Start difference. First operand has 227 states, 225 states have (on average 1.7644444444444445) internal successors, (397), 226 states have internal predecessors, (397), 0 states have call successors, (0), 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 23.0) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:16,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:09:16,279 INFO L93 Difference]: Finished difference Result 560 states and 973 transitions. [2021-11-21 01:09:16,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:09:16,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-11-21 01:09:16,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:09:16,314 INFO L225 Difference]: With dead ends: 560 [2021-11-21 01:09:16,314 INFO L226 Difference]: Without dead ends: 389 [2021-11-21 01:09:16,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:09:16,325 INFO L933 BasicCegarLoop]: 599 mSDtfsCounter, 715 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 947 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 [2021-11-21 01:09:16,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 947 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:09:16,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-21 01:09:16,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 387. [2021-11-21 01:09:16,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.3419689119170986) internal successors, (518), 386 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:16,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 518 transitions. [2021-11-21 01:09:16,424 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 518 transitions. Word has length 115 [2021-11-21 01:09:16,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:09:16,425 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 518 transitions. [2021-11-21 01:09:16,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:16,426 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 518 transitions. [2021-11-21 01:09:16,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-21 01:09:16,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:09:16,435 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:09:16,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:09:16,436 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:09:16,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:09:16,437 INFO L85 PathProgramCache]: Analyzing trace with hash 160382172, now seen corresponding path program 1 times [2021-11-21 01:09:16,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:09:16,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174000706] [2021-11-21 01:09:16,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:09:16,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:09:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:09:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:09:16,793 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:09:16,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174000706] [2021-11-21 01:09:16,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174000706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:09:16,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:09:16,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:09:16,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251284384] [2021-11-21 01:09:16,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:09:16,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:09:16,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:09:16,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:09:16,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:09:16,798 INFO L87 Difference]: Start difference. First operand 387 states and 518 transitions. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:17,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:09:17,476 INFO L93 Difference]: Finished difference Result 1333 states and 1794 transitions. [2021-11-21 01:09:17,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:09:17,477 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-21 01:09:17,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:09:17,485 INFO L225 Difference]: With dead ends: 1333 [2021-11-21 01:09:17,486 INFO L226 Difference]: Without dead ends: 996 [2021-11-21 01:09:17,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:09:17,499 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 2644 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2644 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:09:17,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2644 Valid, 580 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:09:17,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-11-21 01:09:17,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 992. [2021-11-21 01:09:17,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 1.3057517658930373) internal successors, (1294), 991 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:17,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1294 transitions. [2021-11-21 01:09:17,624 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1294 transitions. Word has length 121 [2021-11-21 01:09:17,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:09:17,630 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 1294 transitions. [2021-11-21 01:09:17,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:17,631 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1294 transitions. [2021-11-21 01:09:17,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-21 01:09:17,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:09:17,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:09:17,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:09:17,666 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:09:17,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:09:17,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1020904745, now seen corresponding path program 1 times [2021-11-21 01:09:17,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:09:17,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314659096] [2021-11-21 01:09:17,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:09:17,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:09:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:09:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:09:18,046 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:09:18,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314659096] [2021-11-21 01:09:18,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314659096] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:09:18,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:09:18,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:09:18,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836336829] [2021-11-21 01:09:18,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:09:18,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:09:18,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:09:18,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:09:18,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:09:18,052 INFO L87 Difference]: Start difference. First operand 992 states and 1294 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:18,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:09:18,265 INFO L93 Difference]: Finished difference Result 1766 states and 2359 transitions. [2021-11-21 01:09:18,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:09:18,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-21 01:09:18,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:09:18,273 INFO L225 Difference]: With dead ends: 1766 [2021-11-21 01:09:18,273 INFO L226 Difference]: Without dead ends: 1083 [2021-11-21 01:09:18,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:09:18,284 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 749 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:09:18,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 692 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:09:18,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-11-21 01:09:18,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1081. [2021-11-21 01:09:18,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 1.3148148148148149) internal successors, (1420), 1080 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:18,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1420 transitions. [2021-11-21 01:09:18,453 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1420 transitions. Word has length 121 [2021-11-21 01:09:18,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:09:18,456 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1420 transitions. [2021-11-21 01:09:18,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:18,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1420 transitions. [2021-11-21 01:09:18,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-21 01:09:18,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:09:18,461 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:09:18,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:09:18,462 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:09:18,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:09:18,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1032350864, now seen corresponding path program 1 times [2021-11-21 01:09:18,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:09:18,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750446822] [2021-11-21 01:09:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:09:18,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:09:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:09:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:09:18,636 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:09:18,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750446822] [2021-11-21 01:09:18,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750446822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:09:18,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:09:18,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:09:18,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009986060] [2021-11-21 01:09:18,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:09:18,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:09:18,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:09:18,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:09:18,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:09:18,641 INFO L87 Difference]: Start difference. First operand 1081 states and 1420 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:18,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:09:18,922 INFO L93 Difference]: Finished difference Result 2054 states and 2701 transitions. [2021-11-21 01:09:18,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:09:18,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-21 01:09:18,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:09:18,932 INFO L225 Difference]: With dead ends: 2054 [2021-11-21 01:09:18,932 INFO L226 Difference]: Without dead ends: 1081 [2021-11-21 01:09:18,934 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 [2021-11-21 01:09:18,935 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 786 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:09:18,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 226 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:09:18,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-11-21 01:09:19,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 1081. [2021-11-21 01:09:19,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 1.2925925925925925) internal successors, (1396), 1080 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:19,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1396 transitions. [2021-11-21 01:09:19,053 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1396 transitions. Word has length 121 [2021-11-21 01:09:19,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:09:19,053 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1396 transitions. [2021-11-21 01:09:19,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:19,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1396 transitions. [2021-11-21 01:09:19,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-21 01:09:19,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:09:19,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:09:19,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:09:19,058 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:09:19,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:09:19,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1421290091, now seen corresponding path program 1 times [2021-11-21 01:09:19,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:09:19,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054454734] [2021-11-21 01:09:19,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:09:19,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:09:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:09:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:09:19,371 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:09:19,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054454734] [2021-11-21 01:09:19,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054454734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:09:19,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:09:19,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:09:19,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23794761] [2021-11-21 01:09:19,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:09:19,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:09:19,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:09:19,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:09:19,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:09:19,376 INFO L87 Difference]: Start difference. First operand 1081 states and 1396 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:19,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:09:19,765 INFO L93 Difference]: Finished difference Result 3043 states and 3940 transitions. [2021-11-21 01:09:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:09:19,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-21 01:09:19,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:09:19,779 INFO L225 Difference]: With dead ends: 3043 [2021-11-21 01:09:19,779 INFO L226 Difference]: Without dead ends: 2044 [2021-11-21 01:09:19,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:09:19,783 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 1206 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:09:19,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1206 Valid, 507 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:09:19,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-11-21 01:09:20,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 2042. [2021-11-21 01:09:20,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2042 states, 2041 states have (on average 1.2876041156295934) internal successors, (2628), 2041 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:20,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 2628 transitions. [2021-11-21 01:09:20,044 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 2628 transitions. Word has length 121 [2021-11-21 01:09:20,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:09:20,044 INFO L470 AbstractCegarLoop]: Abstraction has 2042 states and 2628 transitions. [2021-11-21 01:09:20,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:20,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 2628 transitions. [2021-11-21 01:09:20,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-21 01:09:20,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:09:20,050 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:09:20,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:09:20,051 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:09:20,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:09:20,051 INFO L85 PathProgramCache]: Analyzing trace with hash -31024589, now seen corresponding path program 1 times [2021-11-21 01:09:20,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:09:20,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503358254] [2021-11-21 01:09:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:09:20,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:09:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:09:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:09:20,372 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:09:20,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503358254] [2021-11-21 01:09:20,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503358254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:09:20,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:09:20,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:09:20,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041276369] [2021-11-21 01:09:20,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:09:20,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:09:20,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:09:20,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:09:20,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:09:20,375 INFO L87 Difference]: Start difference. First operand 2042 states and 2628 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:20,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:09:20,704 INFO L93 Difference]: Finished difference Result 2046 states and 2630 transitions. [2021-11-21 01:09:20,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:09:20,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-21 01:09:20,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:09:20,717 INFO L225 Difference]: With dead ends: 2046 [2021-11-21 01:09:20,717 INFO L226 Difference]: Without dead ends: 1772 [2021-11-21 01:09:20,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:09:20,721 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 965 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:09:20,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [965 Valid, 531 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:09:20,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2021-11-21 01:09:20,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1632. [2021-11-21 01:09:20,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 1.2752912323727774) internal successors, (2080), 1631 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:20,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 2080 transitions. [2021-11-21 01:09:20,896 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 2080 transitions. Word has length 127 [2021-11-21 01:09:20,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:09:20,896 INFO L470 AbstractCegarLoop]: Abstraction has 1632 states and 2080 transitions. [2021-11-21 01:09:20,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:20,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 2080 transitions. [2021-11-21 01:09:20,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-21 01:09:20,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:09:20,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:09:20,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:09:20,902 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:09:20,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:09:20,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1397033387, now seen corresponding path program 1 times [2021-11-21 01:09:20,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:09:20,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859902192] [2021-11-21 01:09:20,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:09:20,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:09:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:09:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:09:21,336 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:09:21,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859902192] [2021-11-21 01:09:21,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859902192] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:09:21,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:09:21,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:09:21,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913474650] [2021-11-21 01:09:21,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:09:21,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:09:21,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:09:21,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:09:21,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:09:21,339 INFO L87 Difference]: Start difference. First operand 1632 states and 2080 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:21,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:09:21,661 INFO L93 Difference]: Finished difference Result 2732 states and 3493 transitions. [2021-11-21 01:09:21,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:09:21,662 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-11-21 01:09:21,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:09:21,674 INFO L225 Difference]: With dead ends: 2732 [2021-11-21 01:09:21,675 INFO L226 Difference]: Without dead ends: 2082 [2021-11-21 01:09:21,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:09:21,682 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 495 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:09:21,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 526 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:09:21,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2021-11-21 01:09:21,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 2080. [2021-11-21 01:09:21,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 1.2645502645502646) internal successors, (2629), 2079 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:21,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 2629 transitions. [2021-11-21 01:09:21,943 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 2629 transitions. Word has length 133 [2021-11-21 01:09:21,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:09:21,943 INFO L470 AbstractCegarLoop]: Abstraction has 2080 states and 2629 transitions. [2021-11-21 01:09:21,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:09:21,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 2629 transitions. [2021-11-21 01:09:21,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-21 01:09:21,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:09:21,948 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:09:21,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:09:21,948 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:09:21,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:09:21,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2112036481, now seen corresponding path program 1 times [2021-11-21 01:09:21,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:09:21,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854486172] [2021-11-21 01:09:21,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:09:21,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:09:22,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:09:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:09:45,284 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:09:45,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854486172] [2021-11-21 01:09:45,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854486172] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:09:45,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:09:45,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-11-21 01:09:45,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641199344] [2021-11-21 01:09:45,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:09:45,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-21 01:09:45,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:09:45,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-21 01:09:45,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1593, Unknown=0, NotChecked=0, Total=1892 [2021-11-21 01:09:45,288 INFO L87 Difference]: Start difference. First operand 2080 states and 2629 transitions. Second operand has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:14,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:10:14,911 INFO L93 Difference]: Finished difference Result 3859 states and 5090 transitions. [2021-11-21 01:10:14,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-21 01:10:14,912 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-11-21 01:10:14,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:10:14,929 INFO L225 Difference]: With dead ends: 3859 [2021-11-21 01:10:14,930 INFO L226 Difference]: Without dead ends: 3094 [2021-11-21 01:10:14,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=1363, Invalid=5609, Unknown=0, NotChecked=0, Total=6972 [2021-11-21 01:10:14,935 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 3851 mSDsluCounter, 4198 mSDsCounter, 0 mSdLazyCounter, 3645 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3851 SdHoareTripleChecker+Valid, 4406 SdHoareTripleChecker+Invalid, 3787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 3645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:10:14,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3851 Valid, 4406 Invalid, 3787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 3645 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2021-11-21 01:10:14,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3094 states. [2021-11-21 01:10:15,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3094 to 2820. [2021-11-21 01:10:15,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2820 states, 2819 states have (on average 1.2912380276693862) internal successors, (3640), 2819 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:15,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2820 states to 2820 states and 3640 transitions. [2021-11-21 01:10:15,354 INFO L78 Accepts]: Start accepts. Automaton has 2820 states and 3640 transitions. Word has length 133 [2021-11-21 01:10:15,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:10:15,357 INFO L470 AbstractCegarLoop]: Abstraction has 2820 states and 3640 transitions. [2021-11-21 01:10:15,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:15,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2820 states and 3640 transitions. [2021-11-21 01:10:15,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-21 01:10:15,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:10:15,362 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:10:15,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:10:15,363 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:10:15,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:10:15,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1623510684, now seen corresponding path program 1 times [2021-11-21 01:10:15,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:10:15,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387390801] [2021-11-21 01:10:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:10:15,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:10:15,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:10:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:10:15,581 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:10:15,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387390801] [2021-11-21 01:10:15,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387390801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:10:15,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:10:15,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:10:15,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960098595] [2021-11-21 01:10:15,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:10:15,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:10:15,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:10:15,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:10:15,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:10:15,585 INFO L87 Difference]: Start difference. First operand 2820 states and 3640 transitions. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:16,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:10:16,596 INFO L93 Difference]: Finished difference Result 6904 states and 8935 transitions. [2021-11-21 01:10:16,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:10:16,597 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-11-21 01:10:16,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:10:16,619 INFO L225 Difference]: With dead ends: 6904 [2021-11-21 01:10:16,619 INFO L226 Difference]: Without dead ends: 4225 [2021-11-21 01:10:16,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:10:16,626 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 1479 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1479 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:10:16,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1479 Valid, 663 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:10:16,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2021-11-21 01:10:17,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 4206. [2021-11-21 01:10:17,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4206 states, 4205 states have (on average 1.2546967895362664) internal successors, (5276), 4205 states have internal predecessors, (5276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:17,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4206 states to 4206 states and 5276 transitions. [2021-11-21 01:10:17,274 INFO L78 Accepts]: Start accepts. Automaton has 4206 states and 5276 transitions. Word has length 133 [2021-11-21 01:10:17,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:10:17,275 INFO L470 AbstractCegarLoop]: Abstraction has 4206 states and 5276 transitions. [2021-11-21 01:10:17,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:17,275 INFO L276 IsEmpty]: Start isEmpty. Operand 4206 states and 5276 transitions. [2021-11-21 01:10:17,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-21 01:10:17,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:10:17,282 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:10:17,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:10:17,282 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:10:17,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:10:17,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1915666155, now seen corresponding path program 1 times [2021-11-21 01:10:17,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:10:17,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835951002] [2021-11-21 01:10:17,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:10:17,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:10:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:10:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:10:17,451 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:10:17,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835951002] [2021-11-21 01:10:17,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835951002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:10:17,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:10:17,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:10:17,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904620979] [2021-11-21 01:10:17,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:10:17,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:10:17,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:10:17,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:10:17,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:10:17,458 INFO L87 Difference]: Start difference. First operand 4206 states and 5276 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:18,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:10:18,116 INFO L93 Difference]: Finished difference Result 5442 states and 6907 transitions. [2021-11-21 01:10:18,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:10:18,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-11-21 01:10:18,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:10:18,137 INFO L225 Difference]: With dead ends: 5442 [2021-11-21 01:10:18,137 INFO L226 Difference]: Without dead ends: 3665 [2021-11-21 01:10:18,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:10:18,141 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 907 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:10:18,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 599 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:10:18,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3665 states. [2021-11-21 01:10:18,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3665 to 3663. [2021-11-21 01:10:18,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 1.2515019115237576) internal successors, (4583), 3662 states have internal predecessors, (4583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 4583 transitions. [2021-11-21 01:10:18,582 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 4583 transitions. Word has length 133 [2021-11-21 01:10:18,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:10:18,582 INFO L470 AbstractCegarLoop]: Abstraction has 3663 states and 4583 transitions. [2021-11-21 01:10:18,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:18,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 4583 transitions. [2021-11-21 01:10:18,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-21 01:10:18,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:10:18,588 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:10:18,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:10:18,588 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:10:18,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:10:18,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1612766911, now seen corresponding path program 1 times [2021-11-21 01:10:18,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:10:18,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698179071] [2021-11-21 01:10:18,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:10:18,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:10:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:10:36,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:10:36,524 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:10:36,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698179071] [2021-11-21 01:10:36,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698179071] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:10:36,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:10:36,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-11-21 01:10:36,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378382086] [2021-11-21 01:10:36,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:10:36,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-21 01:10:36,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:10:36,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-21 01:10:36,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1638, Unknown=0, NotChecked=0, Total=1892 [2021-11-21 01:10:36,527 INFO L87 Difference]: Start difference. First operand 3663 states and 4583 transitions. Second operand has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:00,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:00,950 INFO L93 Difference]: Finished difference Result 5420 states and 6825 transitions. [2021-11-21 01:11:00,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-21 01:11:00,951 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-11-21 01:11:00,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:00,967 INFO L225 Difference]: With dead ends: 5420 [2021-11-21 01:11:00,967 INFO L226 Difference]: Without dead ends: 4137 [2021-11-21 01:11:00,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=1120, Invalid=5200, Unknown=0, NotChecked=0, Total=6320 [2021-11-21 01:11:00,973 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 2203 mSDsluCounter, 3265 mSDsCounter, 0 mSdLazyCounter, 2442 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2203 SdHoareTripleChecker+Valid, 3564 SdHoareTripleChecker+Invalid, 2497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:00,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2203 Valid, 3564 Invalid, 2497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2442 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-21 01:11:00,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4137 states. [2021-11-21 01:11:01,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4137 to 3779. [2021-11-21 01:11:01,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3779 states, 3778 states have (on average 1.2464266807834834) internal successors, (4709), 3778 states have internal predecessors, (4709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3779 states to 3779 states and 4709 transitions. [2021-11-21 01:11:01,473 INFO L78 Accepts]: Start accepts. Automaton has 3779 states and 4709 transitions. Word has length 133 [2021-11-21 01:11:01,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:11:01,474 INFO L470 AbstractCegarLoop]: Abstraction has 3779 states and 4709 transitions. [2021-11-21 01:11:01,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:01,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3779 states and 4709 transitions. [2021-11-21 01:11:01,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-21 01:11:01,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:01,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:11:01,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:11:01,481 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:11:01,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:01,481 INFO L85 PathProgramCache]: Analyzing trace with hash 705336723, now seen corresponding path program 1 times [2021-11-21 01:11:01,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:01,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133561552] [2021-11-21 01:11:01,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:01,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:11:01,562 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:01,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133561552] [2021-11-21 01:11:01,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133561552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:01,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:01,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:11:01,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825348932] [2021-11-21 01:11:01,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:01,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:11:01,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:01,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:11:01,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:11:01,565 INFO L87 Difference]: Start difference. First operand 3779 states and 4709 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:02,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:02,322 INFO L93 Difference]: Finished difference Result 6627 states and 8302 transitions. [2021-11-21 01:11:02,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:11:02,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-21 01:11:02,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:02,353 INFO L225 Difference]: With dead ends: 6627 [2021-11-21 01:11:02,360 INFO L226 Difference]: Without dead ends: 4071 [2021-11-21 01:11:02,365 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 [2021-11-21 01:11:02,366 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 221 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:02,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 305 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:11:02,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2021-11-21 01:11:02,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 3734. [2021-11-21 01:11:02,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3734 states, 3733 states have (on average 1.2368068577551568) internal successors, (4617), 3733 states have internal predecessors, (4617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:02,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3734 states to 3734 states and 4617 transitions. [2021-11-21 01:11:02,998 INFO L78 Accepts]: Start accepts. Automaton has 3734 states and 4617 transitions. Word has length 134 [2021-11-21 01:11:02,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:11:02,999 INFO L470 AbstractCegarLoop]: Abstraction has 3734 states and 4617 transitions. [2021-11-21 01:11:03,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:03,000 INFO L276 IsEmpty]: Start isEmpty. Operand 3734 states and 4617 transitions. [2021-11-21 01:11:03,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-21 01:11:03,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:03,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:11:03,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 01:11:03,008 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:11:03,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:03,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1863063984, now seen corresponding path program 1 times [2021-11-21 01:11:03,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:03,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744025265] [2021-11-21 01:11:03,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:03,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:11:03,100 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:03,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744025265] [2021-11-21 01:11:03,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744025265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:03,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:03,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:11:03,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015536907] [2021-11-21 01:11:03,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:03,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:11:03,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:03,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:11:03,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:11:03,102 INFO L87 Difference]: Start difference. First operand 3734 states and 4617 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:03,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:03,780 INFO L93 Difference]: Finished difference Result 6173 states and 7637 transitions. [2021-11-21 01:11:03,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:11:03,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-21 01:11:03,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:03,788 INFO L225 Difference]: With dead ends: 6173 [2021-11-21 01:11:03,788 INFO L226 Difference]: Without dead ends: 3735 [2021-11-21 01:11:03,792 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 [2021-11-21 01:11:03,793 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 200 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:03,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 232 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:11:03,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3735 states. [2021-11-21 01:11:04,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3735 to 3681. [2021-11-21 01:11:04,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3681 states, 3680 states have (on average 1.2252717391304349) internal successors, (4509), 3680 states have internal predecessors, (4509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:04,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3681 states to 3681 states and 4509 transitions. [2021-11-21 01:11:04,406 INFO L78 Accepts]: Start accepts. Automaton has 3681 states and 4509 transitions. Word has length 134 [2021-11-21 01:11:04,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:11:04,406 INFO L470 AbstractCegarLoop]: Abstraction has 3681 states and 4509 transitions. [2021-11-21 01:11:04,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:04,407 INFO L276 IsEmpty]: Start isEmpty. Operand 3681 states and 4509 transitions. [2021-11-21 01:11:04,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-21 01:11:04,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:04,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:11:04,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 01:11:04,413 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:11:04,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:04,414 INFO L85 PathProgramCache]: Analyzing trace with hash -2026271304, now seen corresponding path program 1 times [2021-11-21 01:11:04,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:04,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081676918] [2021-11-21 01:11:04,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:04,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:11:04,467 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:04,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081676918] [2021-11-21 01:11:04,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081676918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:04,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:04,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:11:04,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341690260] [2021-11-21 01:11:04,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:04,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:11:04,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:04,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:11:04,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:11:04,470 INFO L87 Difference]: Start difference. First operand 3681 states and 4509 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:05,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:05,235 INFO L93 Difference]: Finished difference Result 6666 states and 8228 transitions. [2021-11-21 01:11:05,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:11:05,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-21 01:11:05,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:05,243 INFO L225 Difference]: With dead ends: 6666 [2021-11-21 01:11:05,244 INFO L226 Difference]: Without dead ends: 4159 [2021-11-21 01:11:05,248 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 [2021-11-21 01:11:05,248 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 208 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:05,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 334 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:11:05,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4159 states. [2021-11-21 01:11:05,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4159 to 3573. [2021-11-21 01:11:05,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3573 states, 3572 states have (on average 1.2186450167973124) internal successors, (4353), 3572 states have internal predecessors, (4353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:05,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3573 states to 3573 states and 4353 transitions. [2021-11-21 01:11:05,848 INFO L78 Accepts]: Start accepts. Automaton has 3573 states and 4353 transitions. Word has length 134 [2021-11-21 01:11:05,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:11:05,848 INFO L470 AbstractCegarLoop]: Abstraction has 3573 states and 4353 transitions. [2021-11-21 01:11:05,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:05,849 INFO L276 IsEmpty]: Start isEmpty. Operand 3573 states and 4353 transitions. [2021-11-21 01:11:05,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-21 01:11:05,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:05,854 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:11:05,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 01:11:05,854 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:11:05,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:05,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1883195160, now seen corresponding path program 1 times [2021-11-21 01:11:05,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:05,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649504824] [2021-11-21 01:11:05,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:05,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:11:05,889 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:05,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649504824] [2021-11-21 01:11:05,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649504824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:05,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:05,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:11:05,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390699999] [2021-11-21 01:11:05,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:05,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:11:05,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:05,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:11:05,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:11:05,891 INFO L87 Difference]: Start difference. First operand 3573 states and 4353 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:06,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:06,481 INFO L93 Difference]: Finished difference Result 7189 states and 8875 transitions. [2021-11-21 01:11:06,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:11:06,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-21 01:11:06,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:06,486 INFO L225 Difference]: With dead ends: 7189 [2021-11-21 01:11:06,486 INFO L226 Difference]: Without dead ends: 4088 [2021-11-21 01:11:06,490 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 [2021-11-21 01:11:06,491 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 211 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:06,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 308 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:11:06,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2021-11-21 01:11:07,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 3514. [2021-11-21 01:11:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3514 states, 3513 states have (on average 1.2095075434101907) internal successors, (4249), 3513 states have internal predecessors, (4249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:07,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 4249 transitions. [2021-11-21 01:11:07,043 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 4249 transitions. Word has length 134 [2021-11-21 01:11:07,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:11:07,044 INFO L470 AbstractCegarLoop]: Abstraction has 3514 states and 4249 transitions. [2021-11-21 01:11:07,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:07,044 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 4249 transitions. [2021-11-21 01:11:07,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-21 01:11:07,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:07,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:11:07,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 01:11:07,050 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:11:07,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:07,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1109404638, now seen corresponding path program 1 times [2021-11-21 01:11:07,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:07,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342842201] [2021-11-21 01:11:07,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:07,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:07,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:11:07,105 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:07,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342842201] [2021-11-21 01:11:07,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342842201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:07,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:07,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:11:07,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933896370] [2021-11-21 01:11:07,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:07,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:11:07,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:07,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:11:07,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:11:07,108 INFO L87 Difference]: Start difference. First operand 3514 states and 4249 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:07,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:07,544 INFO L93 Difference]: Finished difference Result 5851 states and 7104 transitions. [2021-11-21 01:11:07,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:11:07,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-21 01:11:07,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:07,550 INFO L225 Difference]: With dead ends: 5851 [2021-11-21 01:11:07,550 INFO L226 Difference]: Without dead ends: 3518 [2021-11-21 01:11:07,554 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 [2021-11-21 01:11:07,555 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 180 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:07,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 230 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:11:07,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3518 states. [2021-11-21 01:11:08,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3518 to 3466. [2021-11-21 01:11:08,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3466 states, 3465 states have (on average 1.197979797979798) internal successors, (4151), 3465 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:08,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3466 states to 3466 states and 4151 transitions. [2021-11-21 01:11:08,150 INFO L78 Accepts]: Start accepts. Automaton has 3466 states and 4151 transitions. Word has length 134 [2021-11-21 01:11:08,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:11:08,153 INFO L470 AbstractCegarLoop]: Abstraction has 3466 states and 4151 transitions. [2021-11-21 01:11:08,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:08,153 INFO L276 IsEmpty]: Start isEmpty. Operand 3466 states and 4151 transitions. [2021-11-21 01:11:08,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-21 01:11:08,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:08,159 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:11:08,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 01:11:08,159 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:11:08,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:08,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1539985247, now seen corresponding path program 1 times [2021-11-21 01:11:08,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:08,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911962635] [2021-11-21 01:11:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:08,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:11:08,211 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:08,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911962635] [2021-11-21 01:11:08,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911962635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:08,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:08,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:11:08,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701139324] [2021-11-21 01:11:08,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:08,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:11:08,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:08,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:11:08,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:11:08,213 INFO L87 Difference]: Start difference. First operand 3466 states and 4151 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:08,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:08,736 INFO L93 Difference]: Finished difference Result 5960 states and 7179 transitions. [2021-11-21 01:11:08,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:11:08,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-21 01:11:08,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:08,744 INFO L225 Difference]: With dead ends: 5960 [2021-11-21 01:11:08,744 INFO L226 Difference]: Without dead ends: 3620 [2021-11-21 01:11:08,747 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 [2021-11-21 01:11:08,750 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 184 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:08,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 252 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:11:08,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3620 states. [2021-11-21 01:11:09,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3620 to 3324. [2021-11-21 01:11:09,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3324 states, 3323 states have (on average 1.1907914535058681) internal successors, (3957), 3323 states have internal predecessors, (3957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 3957 transitions. [2021-11-21 01:11:09,210 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 3957 transitions. Word has length 134 [2021-11-21 01:11:09,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:11:09,211 INFO L470 AbstractCegarLoop]: Abstraction has 3324 states and 3957 transitions. [2021-11-21 01:11:09,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:09,211 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 3957 transitions. [2021-11-21 01:11:09,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-21 01:11:09,216 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:09,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:11:09,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 01:11:09,217 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:11:09,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:09,218 INFO L85 PathProgramCache]: Analyzing trace with hash -206003554, now seen corresponding path program 1 times [2021-11-21 01:11:09,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:09,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735059738] [2021-11-21 01:11:09,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:09,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:11:09,278 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:09,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735059738] [2021-11-21 01:11:09,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735059738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:09,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:09,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:11:09,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742931219] [2021-11-21 01:11:09,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:09,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:11:09,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:09,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:11:09,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:11:09,281 INFO L87 Difference]: Start difference. First operand 3324 states and 3957 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:09,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:11:09,837 INFO L93 Difference]: Finished difference Result 3913 states and 4687 transitions. [2021-11-21 01:11:09,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:11:09,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2021-11-21 01:11:09,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:11:09,843 INFO L225 Difference]: With dead ends: 3913 [2021-11-21 01:11:09,843 INFO L226 Difference]: Without dead ends: 3261 [2021-11-21 01:11:09,845 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 [2021-11-21 01:11:09,846 INFO L933 BasicCegarLoop]: 398 mSDtfsCounter, 153 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:11:09,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 607 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:11:09,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-11-21 01:11:10,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 3259. [2021-11-21 01:11:10,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3259 states, 3258 states have (on average 1.1810926949048497) internal successors, (3848), 3258 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:10,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 3848 transitions. [2021-11-21 01:11:10,321 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 3848 transitions. Word has length 136 [2021-11-21 01:11:10,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:11:10,321 INFO L470 AbstractCegarLoop]: Abstraction has 3259 states and 3848 transitions. [2021-11-21 01:11:10,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:11:10,322 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 3848 transitions. [2021-11-21 01:11:10,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-21 01:11:10,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:11:10,327 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:11:10,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-21 01:11:10,327 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:11:10,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:11:10,328 INFO L85 PathProgramCache]: Analyzing trace with hash -287854409, now seen corresponding path program 1 times [2021-11-21 01:11:10,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:11:10,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365217985] [2021-11-21 01:11:10,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:11:10,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:11:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:11:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:11:49,701 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:11:49,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365217985] [2021-11-21 01:11:49,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365217985] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:11:49,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:11:49,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-21 01:11:49,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262771039] [2021-11-21 01:11:49,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:11:49,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-21 01:11:49,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:11:49,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-21 01:11:49,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=1890, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 01:11:49,704 INFO L87 Difference]: Start difference. First operand 3259 states and 3848 transitions. Second operand has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:12:16,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:12:16,539 INFO L93 Difference]: Finished difference Result 3339 states and 3950 transitions. [2021-11-21 01:12:16,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-21 01:12:16,540 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 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 139 [2021-11-21 01:12:16,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:12:16,543 INFO L225 Difference]: With dead ends: 3339 [2021-11-21 01:12:16,543 INFO L226 Difference]: Without dead ends: 3262 [2021-11-21 01:12:16,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=1455, Invalid=5855, Unknown=0, NotChecked=0, Total=7310 [2021-11-21 01:12:16,547 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 1610 mSDsluCounter, 4867 mSDsCounter, 0 mSdLazyCounter, 5246 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 5089 SdHoareTripleChecker+Invalid, 5293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 5246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:12:16,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1610 Valid, 5089 Invalid, 5293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 5246 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2021-11-21 01:12:16,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3262 states. [2021-11-21 01:12:16,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3262 to 3258. [2021-11-21 01:12:16,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3258 states, 3257 states have (on average 1.1808412649677618) internal successors, (3846), 3257 states have internal predecessors, (3846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:12:16,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3258 states to 3258 states and 3846 transitions. [2021-11-21 01:12:16,911 INFO L78 Accepts]: Start accepts. Automaton has 3258 states and 3846 transitions. Word has length 139 [2021-11-21 01:12:16,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:12:16,911 INFO L470 AbstractCegarLoop]: Abstraction has 3258 states and 3846 transitions. [2021-11-21 01:12:16,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:12:16,912 INFO L276 IsEmpty]: Start isEmpty. Operand 3258 states and 3846 transitions. [2021-11-21 01:12:16,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-21 01:12:16,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:12:16,917 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:12:16,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-21 01:12:16,918 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:12:16,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:12:16,918 INFO L85 PathProgramCache]: Analyzing trace with hash 304966563, now seen corresponding path program 1 times [2021-11-21 01:12:16,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:12:16,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728331988] [2021-11-21 01:12:16,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:12:16,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:12:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:12:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:12:37,477 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:12:37,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728331988] [2021-11-21 01:12:37,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728331988] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:12:37,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:12:37,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-21 01:12:37,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966905998] [2021-11-21 01:12:37,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:12:37,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-21 01:12:37,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:12:37,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-21 01:12:37,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1988, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 01:12:37,480 INFO L87 Difference]: Start difference. First operand 3258 states and 3846 transitions. Second operand has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:13:04,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:13:04,377 INFO L93 Difference]: Finished difference Result 3507 states and 4175 transitions. [2021-11-21 01:13:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-21 01:13:04,378 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 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 139 [2021-11-21 01:13:04,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:13:04,381 INFO L225 Difference]: With dead ends: 3507 [2021-11-21 01:13:04,381 INFO L226 Difference]: Without dead ends: 3350 [2021-11-21 01:13:04,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=1315, Invalid=6341, Unknown=0, NotChecked=0, Total=7656 [2021-11-21 01:13:04,384 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 2020 mSDsluCounter, 5272 mSDsCounter, 0 mSdLazyCounter, 5308 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2020 SdHoareTripleChecker+Valid, 5448 SdHoareTripleChecker+Invalid, 5369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 5308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:13:04,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2020 Valid, 5448 Invalid, 5369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 5308 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2021-11-21 01:13:04,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3350 states. [2021-11-21 01:13:04,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3350 to 3257. [2021-11-21 01:13:04,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 3256 states have (on average 1.1805896805896805) internal successors, (3844), 3256 states have internal predecessors, (3844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:13:04,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 3844 transitions. [2021-11-21 01:13:04,773 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 3844 transitions. Word has length 139 [2021-11-21 01:13:04,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:13:04,774 INFO L470 AbstractCegarLoop]: Abstraction has 3257 states and 3844 transitions. [2021-11-21 01:13:04,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:13:04,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 3844 transitions. [2021-11-21 01:13:04,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-21 01:13:04,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:13:04,779 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:13:04,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-21 01:13:04,780 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:13:04,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:13:04,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1644772842, now seen corresponding path program 1 times [2021-11-21 01:13:04,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:13:04,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242774732] [2021-11-21 01:13:04,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:13:04,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:13:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:13:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:13:16,484 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:13:16,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242774732] [2021-11-21 01:13:16,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242774732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:13:16,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:13:16,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-11-21 01:13:16,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446007216] [2021-11-21 01:13:16,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:13:16,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-21 01:13:16,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:13:16,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-21 01:13:16,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2021-11-21 01:13:16,487 INFO L87 Difference]: Start difference. First operand 3257 states and 3844 transitions. Second operand has 43 states, 43 states have (on average 3.2325581395348837) internal successors, (139), 42 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:13:33,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:13:33,453 INFO L93 Difference]: Finished difference Result 5838 states and 7322 transitions. [2021-11-21 01:13:33,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-21 01:13:33,453 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.2325581395348837) internal successors, (139), 42 states have internal predecessors, (139), 0 states have call successors, (0), 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 139 [2021-11-21 01:13:33,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:13:33,457 INFO L225 Difference]: With dead ends: 5838 [2021-11-21 01:13:33,457 INFO L226 Difference]: Without dead ends: 4428 [2021-11-21 01:13:33,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=1110, Invalid=6372, Unknown=0, NotChecked=0, Total=7482 [2021-11-21 01:13:33,463 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 2090 mSDsluCounter, 3975 mSDsCounter, 0 mSdLazyCounter, 4448 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2090 SdHoareTripleChecker+Valid, 4104 SdHoareTripleChecker+Invalid, 4596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 4448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:13:33,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2090 Valid, 4104 Invalid, 4596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 4448 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-11-21 01:13:33,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4428 states. [2021-11-21 01:13:34,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4428 to 4420. [2021-11-21 01:13:34,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4420 states, 4419 states have (on average 1.2176963113826658) internal successors, (5381), 4419 states have internal predecessors, (5381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:13:34,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 5381 transitions. [2021-11-21 01:13:34,035 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 5381 transitions. Word has length 139 [2021-11-21 01:13:34,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:13:34,035 INFO L470 AbstractCegarLoop]: Abstraction has 4420 states and 5381 transitions. [2021-11-21 01:13:34,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.2325581395348837) internal successors, (139), 42 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:13:34,035 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 5381 transitions. [2021-11-21 01:13:34,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-21 01:13:34,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:13:34,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:13:34,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-21 01:13:34,040 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:13:34,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:13:34,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1560579393, now seen corresponding path program 1 times [2021-11-21 01:13:34,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:13:34,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693663205] [2021-11-21 01:13:34,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:13:34,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:13:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:13:50,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:13:50,519 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:13:50,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693663205] [2021-11-21 01:13:50,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693663205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:13:50,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:13:50,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-21 01:13:50,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715566974] [2021-11-21 01:13:50,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:13:50,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-21 01:13:50,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:13:50,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-21 01:13:50,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1910, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 01:13:50,523 INFO L87 Difference]: Start difference. First operand 4420 states and 5381 transitions. Second operand has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:16,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:16,732 INFO L93 Difference]: Finished difference Result 4940 states and 6054 transitions. [2021-11-21 01:14:16,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-21 01:14:16,734 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 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 139 [2021-11-21 01:14:16,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:16,739 INFO L225 Difference]: With dead ends: 4940 [2021-11-21 01:14:16,739 INFO L226 Difference]: Without dead ends: 4599 [2021-11-21 01:14:16,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=1459, Invalid=6197, Unknown=0, NotChecked=0, Total=7656 [2021-11-21 01:14:16,743 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 1765 mSDsluCounter, 4948 mSDsCounter, 0 mSdLazyCounter, 5234 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1765 SdHoareTripleChecker+Valid, 5220 SdHoareTripleChecker+Invalid, 5279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 5234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:16,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1765 Valid, 5220 Invalid, 5279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 5234 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2021-11-21 01:14:16,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4599 states. [2021-11-21 01:14:17,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4599 to 4419. [2021-11-21 01:14:17,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4419 states, 4418 states have (on average 1.2172928927116342) internal successors, (5378), 4418 states have internal predecessors, (5378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:17,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4419 states to 4419 states and 5378 transitions. [2021-11-21 01:14:17,271 INFO L78 Accepts]: Start accepts. Automaton has 4419 states and 5378 transitions. Word has length 139 [2021-11-21 01:14:17,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:17,271 INFO L470 AbstractCegarLoop]: Abstraction has 4419 states and 5378 transitions. [2021-11-21 01:14:17,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:17,272 INFO L276 IsEmpty]: Start isEmpty. Operand 4419 states and 5378 transitions. [2021-11-21 01:14:17,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-21 01:14:17,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:17,276 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:14:17,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-21 01:14:17,276 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:17,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:17,277 INFO L85 PathProgramCache]: Analyzing trace with hash 229657911, now seen corresponding path program 1 times [2021-11-21 01:14:17,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:17,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544669418] [2021-11-21 01:14:17,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:17,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:14:43,663 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:43,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544669418] [2021-11-21 01:14:43,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544669418] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:43,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:43,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-11-21 01:14:43,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997384582] [2021-11-21 01:14:43,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:43,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-21 01:14:43,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:43,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-21 01:14:43,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1898, Unknown=0, NotChecked=0, Total=2162 [2021-11-21 01:14:43,665 INFO L87 Difference]: Start difference. First operand 4419 states and 5378 transitions. Second operand has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:15:24,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:24,114 INFO L93 Difference]: Finished difference Result 5621 states and 6905 transitions. [2021-11-21 01:15:24,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-21 01:15:24,115 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 0 states have call successors, (0), 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 139 [2021-11-21 01:15:24,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:24,119 INFO L225 Difference]: With dead ends: 5621 [2021-11-21 01:15:24,119 INFO L226 Difference]: Without dead ends: 4898 [2021-11-21 01:15:24,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=1296, Invalid=5844, Unknown=0, NotChecked=0, Total=7140 [2021-11-21 01:15:24,123 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 1534 mSDsluCounter, 6148 mSDsCounter, 0 mSdLazyCounter, 6239 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1534 SdHoareTripleChecker+Valid, 6422 SdHoareTripleChecker+Invalid, 6272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 6239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:24,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1534 Valid, 6422 Invalid, 6272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 6239 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2021-11-21 01:15:24,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-11-21 01:15:24,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 4418. [2021-11-21 01:15:24,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4418 states, 4417 states have (on average 1.2166628933665384) internal successors, (5374), 4417 states have internal predecessors, (5374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:15:24,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4418 states to 4418 states and 5374 transitions. [2021-11-21 01:15:24,737 INFO L78 Accepts]: Start accepts. Automaton has 4418 states and 5374 transitions. Word has length 139 [2021-11-21 01:15:24,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:24,738 INFO L470 AbstractCegarLoop]: Abstraction has 4418 states and 5374 transitions. [2021-11-21 01:15:24,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:15:24,738 INFO L276 IsEmpty]: Start isEmpty. Operand 4418 states and 5374 transitions. [2021-11-21 01:15:24,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-21 01:15:24,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:24,741 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:24,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-21 01:15:24,741 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:15:24,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:24,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1171021157, now seen corresponding path program 1 times [2021-11-21 01:15:24,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:24,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124168873] [2021-11-21 01:15:24,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:24,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:15:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:15:39,715 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:15:39,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124168873] [2021-11-21 01:15:39,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124168873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:15:39,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:15:39,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-21 01:15:39,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319005483] [2021-11-21 01:15:39,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:15:39,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-21 01:15:39,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:15:39,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-21 01:15:39,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=1895, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 01:15:39,718 INFO L87 Difference]: Start difference. First operand 4418 states and 5374 transitions. Second operand has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:15:59,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:59,111 INFO L93 Difference]: Finished difference Result 4840 states and 5888 transitions. [2021-11-21 01:15:59,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-21 01:15:59,112 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 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 139 [2021-11-21 01:15:59,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:59,116 INFO L225 Difference]: With dead ends: 4840 [2021-11-21 01:15:59,116 INFO L226 Difference]: Without dead ends: 4498 [2021-11-21 01:15:59,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=1502, Invalid=6154, Unknown=0, NotChecked=0, Total=7656 [2021-11-21 01:15:59,118 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 1704 mSDsluCounter, 3134 mSDsCounter, 0 mSdLazyCounter, 3358 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 3404 SdHoareTripleChecker+Invalid, 3396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:59,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1704 Valid, 3404 Invalid, 3396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3358 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-21 01:15:59,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4498 states. [2021-11-21 01:15:59,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4498 to 4417. [2021-11-21 01:15:59,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4417 states, 4416 states have (on average 1.2162590579710144) internal successors, (5371), 4416 states have internal predecessors, (5371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:15:59,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4417 states to 4417 states and 5371 transitions. [2021-11-21 01:15:59,696 INFO L78 Accepts]: Start accepts. Automaton has 4417 states and 5371 transitions. Word has length 139 [2021-11-21 01:15:59,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:15:59,697 INFO L470 AbstractCegarLoop]: Abstraction has 4417 states and 5371 transitions. [2021-11-21 01:15:59,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:15:59,697 INFO L276 IsEmpty]: Start isEmpty. Operand 4417 states and 5371 transitions. [2021-11-21 01:15:59,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-21 01:15:59,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:15:59,701 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:15:59,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-21 01:15:59,701 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:15:59,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:15:59,702 INFO L85 PathProgramCache]: Analyzing trace with hash 870992682, now seen corresponding path program 1 times [2021-11-21 01:15:59,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:15:59,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321612816] [2021-11-21 01:15:59,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:15:59,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:15:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:16:07,272 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:16:07,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321612816] [2021-11-21 01:16:07,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321612816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:16:07,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:16:07,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-11-21 01:16:07,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46924937] [2021-11-21 01:16:07,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:16:07,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-21 01:16:07,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:16:07,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-21 01:16:07,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2021-11-21 01:16:07,275 INFO L87 Difference]: Start difference. First operand 4417 states and 5371 transitions. Second operand has 43 states, 43 states have (on average 3.2325581395348837) internal successors, (139), 42 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:16:23,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:16:23,706 INFO L93 Difference]: Finished difference Result 7862 states and 10024 transitions. [2021-11-21 01:16:23,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-21 01:16:23,707 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.2325581395348837) internal successors, (139), 42 states have internal predecessors, (139), 0 states have call successors, (0), 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 139 [2021-11-21 01:16:23,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:16:23,714 INFO L225 Difference]: With dead ends: 7862 [2021-11-21 01:16:23,714 INFO L226 Difference]: Without dead ends: 6727 [2021-11-21 01:16:23,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2028 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1204, Invalid=7352, Unknown=0, NotChecked=0, Total=8556 [2021-11-21 01:16:23,718 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 1818 mSDsluCounter, 5836 mSDsCounter, 0 mSdLazyCounter, 6089 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1818 SdHoareTripleChecker+Valid, 6065 SdHoareTripleChecker+Invalid, 6227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 6089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:16:23,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1818 Valid, 6065 Invalid, 6227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 6089 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2021-11-21 01:16:23,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6727 states. [2021-11-21 01:16:24,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6727 to 5824. [2021-11-21 01:16:24,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5824 states, 5823 states have (on average 1.2493560020607934) internal successors, (7275), 5823 states have internal predecessors, (7275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:16:24,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5824 states to 5824 states and 7275 transitions. [2021-11-21 01:16:24,520 INFO L78 Accepts]: Start accepts. Automaton has 5824 states and 7275 transitions. Word has length 139 [2021-11-21 01:16:24,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:16:24,521 INFO L470 AbstractCegarLoop]: Abstraction has 5824 states and 7275 transitions. [2021-11-21 01:16:24,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.2325581395348837) internal successors, (139), 42 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:16:24,521 INFO L276 IsEmpty]: Start isEmpty. Operand 5824 states and 7275 transitions. [2021-11-21 01:16:24,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-21 01:16:24,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:16:24,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:16:24,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-21 01:16:24,525 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:16:24,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:16:24,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1851221155, now seen corresponding path program 1 times [2021-11-21 01:16:24,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:16:24,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074786075] [2021-11-21 01:16:24,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:16:24,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:16:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:16:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:16:43,242 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:16:43,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074786075] [2021-11-21 01:16:43,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074786075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:16:43,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:16:43,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-11-21 01:16:43,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255142037] [2021-11-21 01:16:43,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:16:43,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-21 01:16:43,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:16:43,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-21 01:16:43,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1818, Unknown=0, NotChecked=0, Total=2070 [2021-11-21 01:16:43,244 INFO L87 Difference]: Start difference. First operand 5824 states and 7275 transitions. Second operand has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:17:03,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:17:03,785 INFO L93 Difference]: Finished difference Result 6620 states and 8268 transitions. [2021-11-21 01:17:03,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-21 01:17:03,786 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 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 139 [2021-11-21 01:17:03,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:17:03,792 INFO L225 Difference]: With dead ends: 6620 [2021-11-21 01:17:03,792 INFO L226 Difference]: Without dead ends: 5867 [2021-11-21 01:17:03,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=1232, Invalid=5248, Unknown=0, NotChecked=0, Total=6480 [2021-11-21 01:17:03,795 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 1829 mSDsluCounter, 3471 mSDsCounter, 0 mSdLazyCounter, 3463 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1829 SdHoareTripleChecker+Valid, 3753 SdHoareTripleChecker+Invalid, 3508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 3463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:17:03,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1829 Valid, 3753 Invalid, 3508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 3463 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-21 01:17:03,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5867 states. [2021-11-21 01:17:04,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5867 to 5823. [2021-11-21 01:17:04,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5823 states, 5822 states have (on average 1.2488835451734799) internal successors, (7271), 5822 states have internal predecessors, (7271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:17:04,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5823 states to 5823 states and 7271 transitions. [2021-11-21 01:17:04,674 INFO L78 Accepts]: Start accepts. Automaton has 5823 states and 7271 transitions. Word has length 139 [2021-11-21 01:17:04,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:17:04,674 INFO L470 AbstractCegarLoop]: Abstraction has 5823 states and 7271 transitions. [2021-11-21 01:17:04,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:17:04,675 INFO L276 IsEmpty]: Start isEmpty. Operand 5823 states and 7271 transitions. [2021-11-21 01:17:04,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-21 01:17:04,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:17:04,677 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:17:04,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-21 01:17:04,677 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:17:04,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:17:04,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1771576589, now seen corresponding path program 1 times [2021-11-21 01:17:04,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:17:04,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530484809] [2021-11-21 01:17:04,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:17:04,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:17:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:17:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:17:16,995 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:17:16,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530484809] [2021-11-21 01:17:16,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530484809] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:17:16,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:17:16,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-11-21 01:17:16,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529336091] [2021-11-21 01:17:16,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:17:16,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-21 01:17:16,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:17:16,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-21 01:17:16,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1893, Unknown=0, NotChecked=0, Total=2162 [2021-11-21 01:17:16,996 INFO L87 Difference]: Start difference. First operand 5823 states and 7271 transitions. Second operand has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:17:37,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:17:37,446 INFO L93 Difference]: Finished difference Result 6734 states and 8428 transitions. [2021-11-21 01:17:37,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-21 01:17:37,447 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 0 states have call successors, (0), 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 139 [2021-11-21 01:17:37,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:17:37,453 INFO L225 Difference]: With dead ends: 6734 [2021-11-21 01:17:37,453 INFO L226 Difference]: Without dead ends: 5826 [2021-11-21 01:17:37,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=1319, Invalid=5991, Unknown=0, NotChecked=0, Total=7310 [2021-11-21 01:17:37,457 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 1387 mSDsluCounter, 4505 mSDsCounter, 0 mSdLazyCounter, 4781 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1387 SdHoareTripleChecker+Valid, 4762 SdHoareTripleChecker+Invalid, 4815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 4781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:17:37,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1387 Valid, 4762 Invalid, 4815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 4781 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2021-11-21 01:17:37,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-11-21 01:17:38,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 5822. [2021-11-21 01:17:38,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5822 states, 5821 states have (on average 1.2480673423810342) internal successors, (7265), 5821 states have internal predecessors, (7265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:17:38,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5822 states to 5822 states and 7265 transitions. [2021-11-21 01:17:38,357 INFO L78 Accepts]: Start accepts. Automaton has 5822 states and 7265 transitions. Word has length 139 [2021-11-21 01:17:38,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:17:38,358 INFO L470 AbstractCegarLoop]: Abstraction has 5822 states and 7265 transitions. [2021-11-21 01:17:38,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:17:38,359 INFO L276 IsEmpty]: Start isEmpty. Operand 5822 states and 7265 transitions. [2021-11-21 01:17:38,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-21 01:17:38,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:17:38,363 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:17:38,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-21 01:17:38,363 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:17:38,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:17:38,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1122711639, now seen corresponding path program 1 times [2021-11-21 01:17:38,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:17:38,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150876944] [2021-11-21 01:17:38,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:17:38,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:17:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:17:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:17:54,038 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:17:54,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150876944] [2021-11-21 01:17:54,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150876944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:17:54,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:17:54,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-11-21 01:17:54,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000003416] [2021-11-21 01:17:54,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:17:54,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-21 01:17:54,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:17:54,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-21 01:17:54,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1751, Unknown=0, NotChecked=0, Total=2070 [2021-11-21 01:17:54,041 INFO L87 Difference]: Start difference. First operand 5822 states and 7265 transitions. Second operand has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:18:21,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:18:21,237 INFO L93 Difference]: Finished difference Result 6328 states and 7922 transitions. [2021-11-21 01:18:21,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-21 01:18:21,237 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 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 139 [2021-11-21 01:18:21,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:18:21,244 INFO L225 Difference]: With dead ends: 6328 [2021-11-21 01:18:21,244 INFO L226 Difference]: Without dead ends: 6045 [2021-11-21 01:18:21,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=1323, Invalid=5649, Unknown=0, NotChecked=0, Total=6972 [2021-11-21 01:18:21,247 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 1970 mSDsluCounter, 4514 mSDsCounter, 0 mSdLazyCounter, 5115 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1970 SdHoareTripleChecker+Valid, 4789 SdHoareTripleChecker+Invalid, 5170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 5115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:18:21,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1970 Valid, 4789 Invalid, 5170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 5115 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2021-11-21 01:18:21,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6045 states. [2021-11-21 01:18:22,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6045 to 5995. [2021-11-21 01:18:22,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5995 states, 5994 states have (on average 1.2510844177510845) internal successors, (7499), 5994 states have internal predecessors, (7499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:18:22,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5995 states to 5995 states and 7499 transitions. [2021-11-21 01:18:22,210 INFO L78 Accepts]: Start accepts. Automaton has 5995 states and 7499 transitions. Word has length 139 [2021-11-21 01:18:22,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:18:22,211 INFO L470 AbstractCegarLoop]: Abstraction has 5995 states and 7499 transitions. [2021-11-21 01:18:22,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:18:22,211 INFO L276 IsEmpty]: Start isEmpty. Operand 5995 states and 7499 transitions. [2021-11-21 01:18:22,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-21 01:18:22,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:18:22,213 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:18:22,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-21 01:18:22,214 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:18:22,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:18:22,214 INFO L85 PathProgramCache]: Analyzing trace with hash 31494487, now seen corresponding path program 1 times [2021-11-21 01:18:22,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:18:22,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602170736] [2021-11-21 01:18:22,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:18:22,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:18:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:18:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:18:37,745 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:18:37,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602170736] [2021-11-21 01:18:37,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602170736] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:18:37,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:18:37,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-11-21 01:18:37,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188209583] [2021-11-21 01:18:37,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:18:37,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-21 01:18:37,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:18:37,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-21 01:18:37,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1817, Unknown=0, NotChecked=0, Total=2070 [2021-11-21 01:18:37,746 INFO L87 Difference]: Start difference. First operand 5995 states and 7499 transitions. Second operand has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:19:04,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:19:04,436 INFO L93 Difference]: Finished difference Result 6752 states and 8455 transitions. [2021-11-21 01:19:04,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-21 01:19:04,437 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 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 139 [2021-11-21 01:19:04,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:19:04,444 INFO L225 Difference]: With dead ends: 6752 [2021-11-21 01:19:04,444 INFO L226 Difference]: Without dead ends: 6042 [2021-11-21 01:19:04,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=1323, Invalid=5817, Unknown=0, NotChecked=0, Total=7140 [2021-11-21 01:19:04,447 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 1974 mSDsluCounter, 2911 mSDsCounter, 0 mSdLazyCounter, 2877 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1974 SdHoareTripleChecker+Valid, 3179 SdHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:19:04,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1974 Valid, 3179 Invalid, 2923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2877 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-21 01:19:04,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6042 states. [2021-11-21 01:19:05,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6042 to 5994. [2021-11-21 01:19:05,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5994 states, 5993 states have (on average 1.2506257300183548) internal successors, (7495), 5993 states have internal predecessors, (7495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:19:05,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5994 states to 5994 states and 7495 transitions. [2021-11-21 01:19:05,538 INFO L78 Accepts]: Start accepts. Automaton has 5994 states and 7495 transitions. Word has length 139 [2021-11-21 01:19:05,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:19:05,538 INFO L470 AbstractCegarLoop]: Abstraction has 5994 states and 7495 transitions. [2021-11-21 01:19:05,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:19:05,539 INFO L276 IsEmpty]: Start isEmpty. Operand 5994 states and 7495 transitions. [2021-11-21 01:19:05,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-21 01:19:05,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:19:05,541 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:19:05,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-21 01:19:05,542 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:19:05,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:19:05,542 INFO L85 PathProgramCache]: Analyzing trace with hash -671088830, now seen corresponding path program 1 times [2021-11-21 01:19:05,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:19:05,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741554739] [2021-11-21 01:19:05,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:19:05,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:19:05,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:19:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:19:06,411 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:19:06,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741554739] [2021-11-21 01:19:06,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741554739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:19:06,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:19:06,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-21 01:19:06,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203863283] [2021-11-21 01:19:06,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:19:06,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 01:19:06,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:19:06,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 01:19:06,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:19:06,413 INFO L87 Difference]: Start difference. First operand 5994 states and 7495 transitions. Second operand has 18 states, 18 states have (on average 7.833333333333333) internal successors, (141), 18 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:19:10,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:19:10,741 INFO L93 Difference]: Finished difference Result 21313 states and 28244 transitions. [2021-11-21 01:19:10,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-21 01:19:10,741 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 7.833333333333333) internal successors, (141), 18 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2021-11-21 01:19:10,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:19:10,764 INFO L225 Difference]: With dead ends: 21313 [2021-11-21 01:19:10,764 INFO L226 Difference]: Without dead ends: 17122 [2021-11-21 01:19:10,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2021-11-21 01:19:10,771 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 1032 mSDsluCounter, 2176 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 2341 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:19:10,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1032 Valid, 2341 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 01:19:10,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17122 states. [2021-11-21 01:19:12,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17122 to 8578. [2021-11-21 01:19:12,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8578 states, 8577 states have (on average 1.2611635770082779) internal successors, (10817), 8577 states have internal predecessors, (10817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:19:12,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8578 states to 8578 states and 10817 transitions. [2021-11-21 01:19:12,539 INFO L78 Accepts]: Start accepts. Automaton has 8578 states and 10817 transitions. Word has length 141 [2021-11-21 01:19:12,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:19:12,540 INFO L470 AbstractCegarLoop]: Abstraction has 8578 states and 10817 transitions. [2021-11-21 01:19:12,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.833333333333333) internal successors, (141), 18 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:19:12,540 INFO L276 IsEmpty]: Start isEmpty. Operand 8578 states and 10817 transitions. [2021-11-21 01:19:12,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-21 01:19:12,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:19:12,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:19:12,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-21 01:19:12,544 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:19:12,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:19:12,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1292101867, now seen corresponding path program 1 times [2021-11-21 01:19:12,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:19:12,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003582394] [2021-11-21 01:19:12,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:19:12,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:19:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:19:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:19:39,981 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:19:39,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003582394] [2021-11-21 01:19:39,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003582394] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:19:39,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:19:39,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-11-21 01:19:39,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014632351] [2021-11-21 01:19:39,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:19:39,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-21 01:19:39,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:19:39,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-21 01:19:39,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2187, Unknown=0, NotChecked=0, Total=2450 [2021-11-21 01:19:39,984 INFO L87 Difference]: Start difference. First operand 8578 states and 10817 transitions. Second operand has 50 states, 50 states have (on average 2.9) internal successors, (145), 49 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:20:29,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:29,466 INFO L93 Difference]: Finished difference Result 9033 states and 11393 transitions. [2021-11-21 01:20:29,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-21 01:20:29,467 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.9) internal successors, (145), 49 states have internal predecessors, (145), 0 states have call successors, (0), 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 145 [2021-11-21 01:20:29,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:29,476 INFO L225 Difference]: With dead ends: 9033 [2021-11-21 01:20:29,476 INFO L226 Difference]: Without dead ends: 8753 [2021-11-21 01:20:29,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 44.2s TimeCoverageRelationStatistics Valid=1463, Invalid=6727, Unknown=0, NotChecked=0, Total=8190 [2021-11-21 01:20:29,479 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 1820 mSDsluCounter, 7461 mSDsCounter, 0 mSdLazyCounter, 8285 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1820 SdHoareTripleChecker+Valid, 7681 SdHoareTripleChecker+Invalid, 8334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 8285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:29,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1820 Valid, 7681 Invalid, 8334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 8285 Invalid, 0 Unknown, 0 Unchecked, 13.5s Time] [2021-11-21 01:20:29,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8753 states. [2021-11-21 01:20:31,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8753 to 8741. [2021-11-21 01:20:31,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8741 states, 8740 states have (on average 1.2617848970251717) internal successors, (11028), 8740 states have internal predecessors, (11028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:20:31,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8741 states to 8741 states and 11028 transitions. [2021-11-21 01:20:31,077 INFO L78 Accepts]: Start accepts. Automaton has 8741 states and 11028 transitions. Word has length 145 [2021-11-21 01:20:31,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:31,078 INFO L470 AbstractCegarLoop]: Abstraction has 8741 states and 11028 transitions. [2021-11-21 01:20:31,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.9) internal successors, (145), 49 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:20:31,078 INFO L276 IsEmpty]: Start isEmpty. Operand 8741 states and 11028 transitions. [2021-11-21 01:20:31,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-21 01:20:31,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:31,082 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:31,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-21 01:20:31,083 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:31,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:31,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1752579294, now seen corresponding path program 1 times [2021-11-21 01:20:31,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:31,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444026070] [2021-11-21 01:20:31,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:31,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:45,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:20:45,147 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:45,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444026070] [2021-11-21 01:20:45,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444026070] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:20:45,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:20:45,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-21 01:20:45,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584981708] [2021-11-21 01:20:45,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:20:45,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-21 01:20:45,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:20:45,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-21 01:20:45,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=1822, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 01:20:45,149 INFO L87 Difference]: Start difference. First operand 8741 states and 11028 transitions. Second operand has 48 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 47 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:05,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:05,470 INFO L93 Difference]: Finished difference Result 10114 states and 12850 transitions. [2021-11-21 01:21:05,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-21 01:21:05,471 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 47 states have internal predecessors, (145), 0 states have call successors, (0), 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 145 [2021-11-21 01:21:05,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:05,481 INFO L225 Difference]: With dead ends: 10114 [2021-11-21 01:21:05,481 INFO L226 Difference]: Without dead ends: 9858 [2021-11-21 01:21:05,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=1170, Invalid=5636, Unknown=0, NotChecked=0, Total=6806 [2021-11-21 01:21:05,484 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 1487 mSDsluCounter, 5166 mSDsCounter, 0 mSdLazyCounter, 5327 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 5395 SdHoareTripleChecker+Invalid, 5374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 5327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:05,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1487 Valid, 5395 Invalid, 5374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 5327 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2021-11-21 01:21:05,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9858 states. [2021-11-21 01:21:07,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9858 to 8849. [2021-11-21 01:21:07,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8849 states, 8848 states have (on average 1.2619801084990958) internal successors, (11166), 8848 states have internal predecessors, (11166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:07,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 11166 transitions. [2021-11-21 01:21:07,107 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 11166 transitions. Word has length 145 [2021-11-21 01:21:07,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:07,107 INFO L470 AbstractCegarLoop]: Abstraction has 8849 states and 11166 transitions. [2021-11-21 01:21:07,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 47 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:21:07,108 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 11166 transitions. [2021-11-21 01:21:07,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-21 01:21:07,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:07,110 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:21:07,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-21 01:21:07,110 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:21:07,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:07,111 INFO L85 PathProgramCache]: Analyzing trace with hash 845847822, now seen corresponding path program 1 times [2021-11-21 01:21:07,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:07,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118546900] [2021-11-21 01:21:07,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:07,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat