./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem05_label49.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f1e75-a345-4ff6-ac56-26e0cf588cd9/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f1e75-a345-4ff6-ac56-26e0cf588cd9/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f1e75-a345-4ff6-ac56-26e0cf588cd9/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f1e75-a345-4ff6-ac56-26e0cf588cd9/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem05_label49.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f1e75-a345-4ff6-ac56-26e0cf588cd9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f1e75-a345-4ff6-ac56-26e0cf588cd9/bin/utaipan-UUZaoUuFF8 --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 ec47703dd9ca56b015ed04be692f36d14f45a0813c854d61b2b3eed727aa39e9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:25:13,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:25:13,651 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:25:13,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:25:13,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:25:13,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:25:13,702 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:25:13,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:25:13,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:25:13,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:25:13,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:25:13,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:25:13,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:25:13,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:25:13,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:25:13,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:25:13,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:25:13,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:25:13,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:25:13,727 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:25:13,729 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:25:13,731 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:25:13,733 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:25:13,734 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:25:13,739 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:25:13,740 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:25:13,740 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:25:13,741 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:25:13,742 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:25:13,743 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:25:13,744 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:25:13,745 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:25:13,746 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:25:13,747 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:25:13,754 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:25:13,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:25:13,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:25:13,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:25:13,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:25:13,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:25:13,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:25:13,763 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f1e75-a345-4ff6-ac56-26e0cf588cd9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:25:13,800 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:25:13,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:25:13,801 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:25:13,801 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:25:13,801 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:25:13,802 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:25:13,802 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:25:13,802 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:25:13,802 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:25:13,803 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:25:13,803 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:25:13,803 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:25:13,803 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:25:13,804 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:25:13,804 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:25:13,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:25:13,805 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:25:13,805 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:25:13,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:25:13,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:25:13,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:25:13,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:25:13,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:25:13,807 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:25:13,807 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:25:13,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:25:13,808 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:25:13,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:25:13,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:25:13,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:25:13,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:13,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:25:13,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:25:13,817 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:25:13,817 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:25:13,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:25:13,817 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:25:13,817 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:25:13,818 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:25:13,818 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_b27f1e75-a345-4ff6-ac56-26e0cf588cd9/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f1e75-a345-4ff6-ac56-26e0cf588cd9/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec47703dd9ca56b015ed04be692f36d14f45a0813c854d61b2b3eed727aa39e9 [2021-11-07 01:25:14,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:25:14,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:25:14,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:25:14,132 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:25:14,133 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:25:14,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f1e75-a345-4ff6-ac56-26e0cf588cd9/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/eca-rers2012/Problem05_label49.c [2021-11-07 01:25:14,199 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f1e75-a345-4ff6-ac56-26e0cf588cd9/bin/utaipan-UUZaoUuFF8/data/5c8f5ea6b/8b49d7e63a1144c3b55ec1b83dab3f62/FLAG6d17ba83a [2021-11-07 01:25:15,251 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:25:15,253 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f1e75-a345-4ff6-ac56-26e0cf588cd9/sv-benchmarks/c/eca-rers2012/Problem05_label49.c [2021-11-07 01:25:15,306 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f1e75-a345-4ff6-ac56-26e0cf588cd9/bin/utaipan-UUZaoUuFF8/data/5c8f5ea6b/8b49d7e63a1144c3b55ec1b83dab3f62/FLAG6d17ba83a [2021-11-07 01:25:15,593 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f1e75-a345-4ff6-ac56-26e0cf588cd9/bin/utaipan-UUZaoUuFF8/data/5c8f5ea6b/8b49d7e63a1144c3b55ec1b83dab3f62 [2021-11-07 01:25:15,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:25:15,598 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:25:15,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:15,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:25:15,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:25:15,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:15" (1/1) ... [2021-11-07 01:25:15,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6baed14c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:15, skipping insertion in model container [2021-11-07 01:25:15,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:15" (1/1) ... [2021-11-07 01:25:15,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:25:15,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:18,102 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f1e75-a345-4ff6-ac56-26e0cf588cd9/sv-benchmarks/c/eca-rers2012/Problem05_label49.c[380250,380263] [2021-11-07 01:25:18,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:18,142 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:25:19,397 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f1e75-a345-4ff6-ac56-26e0cf588cd9/sv-benchmarks/c/eca-rers2012/Problem05_label49.c[380250,380263] [2021-11-07 01:25:19,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:19,468 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:25:19,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:19 WrapperNode [2021-11-07 01:25:19,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:19,470 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:25:19,470 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:25:19,471 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:25:19,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:19" (1/1) ... [2021-11-07 01:25:19,570 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:19" (1/1) ... [2021-11-07 01:25:20,053 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:25:20,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:25:20,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:25:20,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:25:20,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:19" (1/1) ... [2021-11-07 01:25:20,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:19" (1/1) ... [2021-11-07 01:25:20,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:19" (1/1) ... [2021-11-07 01:25:20,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:19" (1/1) ... [2021-11-07 01:25:20,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:19" (1/1) ... [2021-11-07 01:25:20,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:19" (1/1) ... [2021-11-07 01:25:20,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:19" (1/1) ... [2021-11-07 01:25:20,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:25:20,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:25:20,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:25:20,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:25:20,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:19" (1/1) ... [2021-11-07 01:25:20,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:20,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f1e75-a345-4ff6-ac56-26e0cf588cd9/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:25:20,762 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f1e75-a345-4ff6-ac56-26e0cf588cd9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:25:20,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b27f1e75-a345-4ff6-ac56-26e0cf588cd9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:25:20,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:25:20,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:25:20,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:25:20,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:25:32,135 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:25:32,135 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-11-07 01:25:32,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:25:32 BoogieIcfgContainer [2021-11-07 01:25:32,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:25:32,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:25:32,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:25:32,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:25:32,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:25:15" (1/3) ... [2021-11-07 01:25:32,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c4d655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:25:32, skipping insertion in model container [2021-11-07 01:25:32,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:19" (2/3) ... [2021-11-07 01:25:32,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c4d655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:25:32, skipping insertion in model container [2021-11-07 01:25:32,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:25:32" (3/3) ... [2021-11-07 01:25:32,154 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label49.c [2021-11-07 01:25:32,160 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:25:32,160 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:25:32,233 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:25:32,242 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 [2021-11-07 01:25:32,243 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:25:32,300 INFO L276 IsEmpty]: Start isEmpty. Operand has 1643 states, 1641 states have (on average 1.9932967702620354) internal successors, (3271), 1642 states have internal predecessors, (3271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:32,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1632 [2021-11-07 01:25:32,442 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:32,444 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:32,445 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:32,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:32,453 INFO L85 PathProgramCache]: Analyzing trace with hash -2125838784, now seen corresponding path program 1 times [2021-11-07 01:25:32,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:25:32,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966718135] [2021-11-07 01:25:32,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:32,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:25:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:34,740 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:25:34,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966718135] [2021-11-07 01:25:34,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966718135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:34,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:34,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:25:34,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493019915] [2021-11-07 01:25:34,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:34,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:25:34,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:34,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:34,773 INFO L87 Difference]: Start difference. First operand has 1643 states, 1641 states have (on average 1.9932967702620354) internal successors, (3271), 1642 states have internal predecessors, (3271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 543.6666666666666) internal successors, (1631), 2 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:42,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:42,100 INFO L93 Difference]: Finished difference Result 4925 states and 9809 transitions. [2021-11-07 01:25:42,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:42,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 543.6666666666666) internal successors, (1631), 2 states have internal predecessors, (1631), 0 states have call successors, (0), 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 1631 [2021-11-07 01:25:42,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:42,162 INFO L225 Difference]: With dead ends: 4925 [2021-11-07 01:25:42,163 INFO L226 Difference]: Without dead ends: 3279 [2021-11-07 01:25:42,174 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:42,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-11-07 01:25:42,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 3279. [2021-11-07 01:25:42,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3279 states, 3278 states have (on average 1.8221476510067114) internal successors, (5973), 3278 states have internal predecessors, (5973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:42,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3279 states to 3279 states and 5973 transitions. [2021-11-07 01:25:42,344 INFO L78 Accepts]: Start accepts. Automaton has 3279 states and 5973 transitions. Word has length 1631 [2021-11-07 01:25:42,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:42,348 INFO L470 AbstractCegarLoop]: Abstraction has 3279 states and 5973 transitions. [2021-11-07 01:25:42,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 543.6666666666666) internal successors, (1631), 2 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:42,350 INFO L276 IsEmpty]: Start isEmpty. Operand 3279 states and 5973 transitions. [2021-11-07 01:25:42,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1637 [2021-11-07 01:25:42,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:42,425 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:42,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:25:42,427 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:42,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:42,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1313004680, now seen corresponding path program 1 times [2021-11-07 01:25:42,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:25:42,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068193886] [2021-11-07 01:25:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:42,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:25:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:43,799 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:25:43,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068193886] [2021-11-07 01:25:43,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068193886] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:43,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:43,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:25:43,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155629328] [2021-11-07 01:25:43,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:25:43,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:25:43,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:25:43,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:43,808 INFO L87 Difference]: Start difference. First operand 3279 states and 5973 transitions. Second operand has 3 states, 3 states have (on average 545.3333333333334) internal successors, (1636), 2 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:50,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:50,734 INFO L93 Difference]: Finished difference Result 9833 states and 17916 transitions. [2021-11-07 01:25:50,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:25:50,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 545.3333333333334) internal successors, (1636), 2 states have internal predecessors, (1636), 0 states have call successors, (0), 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 1636 [2021-11-07 01:25:50,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:50,790 INFO L225 Difference]: With dead ends: 9833 [2021-11-07 01:25:50,790 INFO L226 Difference]: Without dead ends: 6555 [2021-11-07 01:25:50,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:25:50,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6555 states. [2021-11-07 01:25:50,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6555 to 6555. [2021-11-07 01:25:50,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6555 states, 6554 states have (on average 1.6539517851693621) internal successors, (10840), 6554 states have internal predecessors, (10840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:51,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6555 states to 6555 states and 10840 transitions. [2021-11-07 01:25:51,001 INFO L78 Accepts]: Start accepts. Automaton has 6555 states and 10840 transitions. Word has length 1636 [2021-11-07 01:25:51,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:51,003 INFO L470 AbstractCegarLoop]: Abstraction has 6555 states and 10840 transitions. [2021-11-07 01:25:51,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 545.3333333333334) internal successors, (1636), 2 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 6555 states and 10840 transitions. [2021-11-07 01:25:51,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1639 [2021-11-07 01:25:51,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:51,058 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:51,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:25:51,059 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:51,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:51,061 INFO L85 PathProgramCache]: Analyzing trace with hash -122925389, now seen corresponding path program 1 times [2021-11-07 01:25:51,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:25:51,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731891147] [2021-11-07 01:25:51,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:51,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:25:51,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:53,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:53,538 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:25:53,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731891147] [2021-11-07 01:25:53,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731891147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:53,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:53,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:25:53,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219197130] [2021-11-07 01:25:53,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:25:53,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:25:53,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:25:53,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:25:53,552 INFO L87 Difference]: Start difference. First operand 6555 states and 10840 transitions. Second operand has 4 states, 4 states have (on average 409.5) internal successors, (1638), 3 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:03,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:03,634 INFO L93 Difference]: Finished difference Result 21297 states and 35095 transitions. [2021-11-07 01:26:03,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:26:03,635 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 409.5) internal successors, (1638), 3 states have internal predecessors, (1638), 0 states have call successors, (0), 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 1638 [2021-11-07 01:26:03,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:03,702 INFO L225 Difference]: With dead ends: 21297 [2021-11-07 01:26:03,702 INFO L226 Difference]: Without dead ends: 13107 [2021-11-07 01:26:03,712 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:26:03,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13107 states. [2021-11-07 01:26:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13107 to 13107. [2021-11-07 01:26:03,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13107 states, 13106 states have (on average 1.3048222188310696) internal successors, (17101), 13106 states have internal predecessors, (17101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13107 states to 13107 states and 17101 transitions. [2021-11-07 01:26:04,038 INFO L78 Accepts]: Start accepts. Automaton has 13107 states and 17101 transitions. Word has length 1638 [2021-11-07 01:26:04,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:04,038 INFO L470 AbstractCegarLoop]: Abstraction has 13107 states and 17101 transitions. [2021-11-07 01:26:04,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 409.5) internal successors, (1638), 3 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:04,040 INFO L276 IsEmpty]: Start isEmpty. Operand 13107 states and 17101 transitions. [2021-11-07 01:26:04,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1645 [2021-11-07 01:26:04,089 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:04,091 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:04,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:26:04,091 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:04,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:04,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1534781818, now seen corresponding path program 1 times [2021-11-07 01:26:04,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:26:04,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596776266] [2021-11-07 01:26:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:04,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:26:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:26:04,638 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:26:04,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596776266] [2021-11-07 01:26:04,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596776266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:04,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:04,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:26:04,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518438575] [2021-11-07 01:26:04,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:26:04,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:26:04,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:26:04,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:26:04,648 INFO L87 Difference]: Start difference. First operand 13107 states and 17101 transitions. Second operand has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:09,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:09,405 INFO L93 Difference]: Finished difference Result 34403 states and 44780 transitions. [2021-11-07 01:26:09,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:26:09,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 0 states have call successors, (0), 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 1644 [2021-11-07 01:26:09,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:09,467 INFO L225 Difference]: With dead ends: 34403 [2021-11-07 01:26:09,467 INFO L226 Difference]: Without dead ends: 21297 [2021-11-07 01:26:09,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:26:09,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21297 states. [2021-11-07 01:26:09,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21297 to 21297. [2021-11-07 01:26:09,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21297 states, 21296 states have (on average 1.1979714500375658) internal successors, (25512), 21296 states have internal predecessors, (25512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:09,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21297 states to 21297 states and 25512 transitions. [2021-11-07 01:26:09,878 INFO L78 Accepts]: Start accepts. Automaton has 21297 states and 25512 transitions. Word has length 1644 [2021-11-07 01:26:09,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:09,879 INFO L470 AbstractCegarLoop]: Abstraction has 21297 states and 25512 transitions. [2021-11-07 01:26:09,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:09,880 INFO L276 IsEmpty]: Start isEmpty. Operand 21297 states and 25512 transitions. [2021-11-07 01:26:09,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1650 [2021-11-07 01:26:09,946 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:09,947 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:09,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:26:09,948 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:09,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:09,998 INFO L85 PathProgramCache]: Analyzing trace with hash 2091892242, now seen corresponding path program 1 times [2021-11-07 01:26:09,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:26:09,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716603133] [2021-11-07 01:26:09,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:09,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:26:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:26:11,136 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:26:11,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716603133] [2021-11-07 01:26:11,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716603133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:11,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:11,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:26:11,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417712548] [2021-11-07 01:26:11,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:26:11,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:26:11,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:26:11,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:26:11,141 INFO L87 Difference]: Start difference. First operand 21297 states and 25512 transitions. Second operand has 3 states, 3 states have (on average 549.6666666666666) internal successors, (1649), 3 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:16,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:16,390 INFO L93 Difference]: Finished difference Result 54059 states and 65379 transitions. [2021-11-07 01:26:16,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:26:16,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 549.6666666666666) internal successors, (1649), 3 states have internal predecessors, (1649), 0 states have call successors, (0), 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 1649 [2021-11-07 01:26:16,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:16,458 INFO L225 Difference]: With dead ends: 54059 [2021-11-07 01:26:16,458 INFO L226 Difference]: Without dead ends: 32763 [2021-11-07 01:26:16,474 INFO L786 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 [2021-11-07 01:26:16,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32763 states. [2021-11-07 01:26:16,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32763 to 32763. [2021-11-07 01:26:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32763 states, 32762 states have (on average 1.2039863256211465) internal successors, (39445), 32762 states have internal predecessors, (39445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:16,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32763 states to 32763 states and 39445 transitions. [2021-11-07 01:26:16,995 INFO L78 Accepts]: Start accepts. Automaton has 32763 states and 39445 transitions. Word has length 1649 [2021-11-07 01:26:16,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:16,997 INFO L470 AbstractCegarLoop]: Abstraction has 32763 states and 39445 transitions. [2021-11-07 01:26:16,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 549.6666666666666) internal successors, (1649), 3 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:16,998 INFO L276 IsEmpty]: Start isEmpty. Operand 32763 states and 39445 transitions. [2021-11-07 01:26:17,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1707 [2021-11-07 01:26:17,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:17,069 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:17,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:26:17,070 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:17,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:17,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1292547971, now seen corresponding path program 1 times [2021-11-07 01:26:17,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:26:17,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36533477] [2021-11-07 01:26:17,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:17,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:26:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:17,718 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:26:17,719 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:26:17,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36533477] [2021-11-07 01:26:17,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36533477] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:17,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:17,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:26:17,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609582499] [2021-11-07 01:26:17,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:26:17,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:26:17,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:26:17,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:26:17,724 INFO L87 Difference]: Start difference. First operand 32763 states and 39445 transitions. Second operand has 3 states, 3 states have (on average 567.3333333333334) internal successors, (1702), 2 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:22,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:22,967 INFO L93 Difference]: Finished difference Result 95009 states and 113272 transitions. [2021-11-07 01:26:22,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:26:22,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 567.3333333333334) internal successors, (1702), 2 states have internal predecessors, (1702), 0 states have call successors, (0), 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 1706 [2021-11-07 01:26:22,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:23,097 INFO L225 Difference]: With dead ends: 95009 [2021-11-07 01:26:23,097 INFO L226 Difference]: Without dead ends: 62247 [2021-11-07 01:26:23,126 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:26:23,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62247 states. [2021-11-07 01:26:23,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62247 to 62247. [2021-11-07 01:26:23,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62247 states, 62246 states have (on average 1.1385470552324648) internal successors, (70870), 62246 states have internal predecessors, (70870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:24,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62247 states to 62247 states and 70870 transitions. [2021-11-07 01:26:24,054 INFO L78 Accepts]: Start accepts. Automaton has 62247 states and 70870 transitions. Word has length 1706 [2021-11-07 01:26:24,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:24,055 INFO L470 AbstractCegarLoop]: Abstraction has 62247 states and 70870 transitions. [2021-11-07 01:26:24,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 567.3333333333334) internal successors, (1702), 2 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:24,056 INFO L276 IsEmpty]: Start isEmpty. Operand 62247 states and 70870 transitions. [2021-11-07 01:26:24,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1725 [2021-11-07 01:26:24,135 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:24,137 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:24,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:26:24,137 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:24,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:24,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1148540565, now seen corresponding path program 1 times [2021-11-07 01:26:24,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:26:24,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909855667] [2021-11-07 01:26:24,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:24,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:26:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:26:24,718 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:26:24,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909855667] [2021-11-07 01:26:24,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909855667] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:24,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:24,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:26:24,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006246589] [2021-11-07 01:26:24,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:26:24,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:26:24,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:26:24,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:26:24,724 INFO L87 Difference]: Start difference. First operand 62247 states and 70870 transitions. Second operand has 3 states, 3 states have (on average 573.3333333333334) internal successors, (1720), 3 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:30,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:30,081 INFO L93 Difference]: Finished difference Result 153977 states and 176122 transitions. [2021-11-07 01:26:30,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:26:30,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 573.3333333333334) internal successors, (1720), 3 states have internal predecessors, (1720), 0 states have call successors, (0), 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 1724 [2021-11-07 01:26:30,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:30,225 INFO L225 Difference]: With dead ends: 153977 [2021-11-07 01:26:30,225 INFO L226 Difference]: Without dead ends: 91731 [2021-11-07 01:26:30,681 INFO L786 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 [2021-11-07 01:26:30,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91731 states. [2021-11-07 01:26:31,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91731 to 91731. [2021-11-07 01:26:31,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91731 states, 91730 states have (on average 1.1103782840946255) internal successors, (101855), 91730 states have internal predecessors, (101855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:32,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91731 states to 91731 states and 101855 transitions. [2021-11-07 01:26:32,082 INFO L78 Accepts]: Start accepts. Automaton has 91731 states and 101855 transitions. Word has length 1724 [2021-11-07 01:26:32,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:32,082 INFO L470 AbstractCegarLoop]: Abstraction has 91731 states and 101855 transitions. [2021-11-07 01:26:32,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 573.3333333333334) internal successors, (1720), 3 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:32,083 INFO L276 IsEmpty]: Start isEmpty. Operand 91731 states and 101855 transitions. [2021-11-07 01:26:32,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1738 [2021-11-07 01:26:32,523 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:32,534 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:32,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:26:32,534 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:32,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:32,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1372865350, now seen corresponding path program 1 times [2021-11-07 01:26:32,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:26:32,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893836833] [2021-11-07 01:26:32,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:32,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:26:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:26:33,314 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:26:33,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893836833] [2021-11-07 01:26:33,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893836833] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:33,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:33,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:26:33,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813011344] [2021-11-07 01:26:33,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:26:33,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:26:33,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:26:33,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:26:33,319 INFO L87 Difference]: Start difference. First operand 91731 states and 101855 transitions. Second operand has 3 states, 3 states have (on average 579.0) internal successors, (1737), 2 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:38,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:38,829 INFO L93 Difference]: Finished difference Result 262085 states and 289876 transitions. [2021-11-07 01:26:38,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:26:38,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 579.0) internal successors, (1737), 2 states have internal predecessors, (1737), 0 states have call successors, (0), 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 1737 [2021-11-07 01:26:38,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:39,218 INFO L225 Difference]: With dead ends: 262085 [2021-11-07 01:26:39,218 INFO L226 Difference]: Without dead ends: 170355 [2021-11-07 01:26:39,276 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:26:39,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170355 states. [2021-11-07 01:26:41,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170355 to 149061. [2021-11-07 01:26:41,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149061 states, 149060 states have (on average 1.08781698644841) internal successors, (162150), 149060 states have internal predecessors, (162150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149061 states to 149061 states and 162150 transitions. [2021-11-07 01:26:41,666 INFO L78 Accepts]: Start accepts. Automaton has 149061 states and 162150 transitions. Word has length 1737 [2021-11-07 01:26:41,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:41,667 INFO L470 AbstractCegarLoop]: Abstraction has 149061 states and 162150 transitions. [2021-11-07 01:26:41,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 579.0) internal successors, (1737), 2 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:41,668 INFO L276 IsEmpty]: Start isEmpty. Operand 149061 states and 162150 transitions. [2021-11-07 01:26:41,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1761 [2021-11-07 01:26:41,835 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:41,836 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:41,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:26:41,836 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:41,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:41,837 INFO L85 PathProgramCache]: Analyzing trace with hash -458212174, now seen corresponding path program 1 times [2021-11-07 01:26:41,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:26:41,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669980895] [2021-11-07 01:26:41,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:41,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:26:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-07 01:26:42,656 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:26:42,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669980895] [2021-11-07 01:26:42,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669980895] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:42,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:42,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:26:42,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560946552] [2021-11-07 01:26:42,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:26:42,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:26:42,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:26:42,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:26:42,661 INFO L87 Difference]: Start difference. First operand 149061 states and 162150 transitions. Second operand has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 2 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:48,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:48,683 INFO L93 Difference]: Finished difference Result 353813 states and 384179 transitions. [2021-11-07 01:26:48,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:26:48,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 2 states have internal predecessors, (1669), 0 states have call successors, (0), 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 1760 [2021-11-07 01:26:48,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:48,948 INFO L225 Difference]: With dead ends: 353813 [2021-11-07 01:26:48,948 INFO L226 Difference]: Without dead ends: 204753 [2021-11-07 01:26:49,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:26:49,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204753 states. [2021-11-07 01:26:51,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204753 to 194925. [2021-11-07 01:26:51,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194925 states, 194924 states have (on average 1.0618138351357451) internal successors, (206973), 194924 states have internal predecessors, (206973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:52,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194925 states to 194925 states and 206973 transitions. [2021-11-07 01:26:52,212 INFO L78 Accepts]: Start accepts. Automaton has 194925 states and 206973 transitions. Word has length 1760 [2021-11-07 01:26:52,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:52,213 INFO L470 AbstractCegarLoop]: Abstraction has 194925 states and 206973 transitions. [2021-11-07 01:26:52,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 2 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:52,213 INFO L276 IsEmpty]: Start isEmpty. Operand 194925 states and 206973 transitions. [2021-11-07 01:26:52,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1870 [2021-11-07 01:26:52,336 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:52,337 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:52,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 01:26:52,337 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:52,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:52,338 INFO L85 PathProgramCache]: Analyzing trace with hash 402625828, now seen corresponding path program 1 times [2021-11-07 01:26:52,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:26:52,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837776061] [2021-11-07 01:26:52,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:52,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:26:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 387 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-07 01:26:53,600 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:26:53,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837776061] [2021-11-07 01:26:53,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837776061] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:53,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:53,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:26:53,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610351693] [2021-11-07 01:26:53,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:26:53,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:26:53,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:26:53,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:26:53,606 INFO L87 Difference]: Start difference. First operand 194925 states and 206973 transitions. Second operand has 3 states, 3 states have (on average 604.3333333333334) internal successors, (1813), 3 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:59,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:59,960 INFO L93 Difference]: Finished difference Result 450455 states and 478315 transitions. [2021-11-07 01:26:59,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:26:59,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 604.3333333333334) internal successors, (1813), 3 states have internal predecessors, (1813), 0 states have call successors, (0), 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 1869 [2021-11-07 01:26:59,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:00,287 INFO L225 Difference]: With dead ends: 450455 [2021-11-07 01:27:00,287 INFO L226 Difference]: Without dead ends: 253893 [2021-11-07 01:27:00,368 INFO L786 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 [2021-11-07 01:27:00,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253893 states. [2021-11-07 01:27:03,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253893 to 252255. [2021-11-07 01:27:03,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252255 states, 252254 states have (on average 1.052070532082742) internal successors, (265389), 252254 states have internal predecessors, (265389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252255 states to 252255 states and 265389 transitions. [2021-11-07 01:27:04,000 INFO L78 Accepts]: Start accepts. Automaton has 252255 states and 265389 transitions. Word has length 1869 [2021-11-07 01:27:04,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:04,000 INFO L470 AbstractCegarLoop]: Abstraction has 252255 states and 265389 transitions. [2021-11-07 01:27:04,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 604.3333333333334) internal successors, (1813), 3 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:04,001 INFO L276 IsEmpty]: Start isEmpty. Operand 252255 states and 265389 transitions. [2021-11-07 01:27:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2028 [2021-11-07 01:27:04,141 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:04,142 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:04,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 01:27:04,143 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:27:04,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:04,144 INFO L85 PathProgramCache]: Analyzing trace with hash -919139906, now seen corresponding path program 1 times [2021-11-07 01:27:04,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:27:04,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954409799] [2021-11-07 01:27:04,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:04,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:27:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 583 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-07 01:27:05,713 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:27:05,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954409799] [2021-11-07 01:27:05,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954409799] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:05,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:05,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:27:05,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649666585] [2021-11-07 01:27:05,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:27:05,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:27:05,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:27:05,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:05,721 INFO L87 Difference]: Start difference. First operand 252255 states and 265389 transitions. Second operand has 3 states, 3 states have (on average 657.0) internal successors, (1971), 3 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:12,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:12,336 INFO L93 Difference]: Finished difference Result 517613 states and 544317 transitions. [2021-11-07 01:27:12,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:27:12,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 657.0) internal successors, (1971), 3 states have internal predecessors, (1971), 0 states have call successors, (0), 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 2027 [2021-11-07 01:27:12,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:12,738 INFO L225 Difference]: With dead ends: 517613 [2021-11-07 01:27:12,739 INFO L226 Difference]: Without dead ends: 262083 [2021-11-07 01:27:12,878 INFO L786 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 [2021-11-07 01:27:13,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262083 states. [2021-11-07 01:27:15,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262083 to 255531. [2021-11-07 01:27:15,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255531 states, 255530 states have (on average 1.0406371071889797) internal successors, (265914), 255530 states have internal predecessors, (265914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)