./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem06_label34.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c2957f-58e5-4056-aa58-3516df435876/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c2957f-58e5-4056-aa58-3516df435876/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c2957f-58e5-4056-aa58-3516df435876/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c2957f-58e5-4056-aa58-3516df435876/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem06_label34.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c2957f-58e5-4056-aa58-3516df435876/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c2957f-58e5-4056-aa58-3516df435876/bin/utaipan-aC7eJsxGYH --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 5720b7b8988236e90efce736cf3593749047732c946eecc8fea6a291ed30b9c6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:36:34,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:36:34,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:36:34,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:36:34,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:36:34,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:36:34,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:36:34,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:36:34,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:36:34,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:36:34,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:36:34,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:36:34,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:36:34,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:36:34,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:36:34,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:36:34,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:36:34,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:36:34,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:36:34,664 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:36:34,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:36:34,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:36:34,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:36:34,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:36:34,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:36:34,676 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:36:34,677 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:36:34,678 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:36:34,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:36:34,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:36:34,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:36:34,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:36:34,683 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:36:34,684 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:36:34,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:36:34,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:36:34,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:36:34,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:36:34,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:36:34,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:36:34,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:36:34,692 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c2957f-58e5-4056-aa58-3516df435876/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:36:34,720 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:36:34,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:36:34,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:36:34,735 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:36:34,736 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:36:34,737 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:36:34,737 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:36:34,740 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:36:34,740 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:36:34,740 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:36:34,741 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:36:34,741 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:36:34,741 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:36:34,741 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:36:34,742 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:36:34,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:36:34,743 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:36:34,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:36:34,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:36:34,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:36:34,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:36:34,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:36:34,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:36:34,745 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:36:34,746 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:36:34,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:36:34,746 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:36:34,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:36:34,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:36:34,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:36:34,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:36:34,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:36:34,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:36:34,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:36:34,748 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:36:34,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:36:34,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:36:34,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:36:34,749 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:36:34,749 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_73c2957f-58e5-4056-aa58-3516df435876/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c2957f-58e5-4056-aa58-3516df435876/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5720b7b8988236e90efce736cf3593749047732c946eecc8fea6a291ed30b9c6 [2021-11-03 05:36:34,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:36:35,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:36:35,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:36:35,008 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:36:35,009 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:36:35,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c2957f-58e5-4056-aa58-3516df435876/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/eca-rers2012/Problem06_label34.c [2021-11-03 05:36:35,093 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c2957f-58e5-4056-aa58-3516df435876/bin/utaipan-aC7eJsxGYH/data/a4553c25d/032a5e7331ac47efb689cbe50f25bf99/FLAG92479a553 [2021-11-03 05:36:36,057 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:36:36,058 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c2957f-58e5-4056-aa58-3516df435876/sv-benchmarks/c/eca-rers2012/Problem06_label34.c [2021-11-03 05:36:36,116 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c2957f-58e5-4056-aa58-3516df435876/bin/utaipan-aC7eJsxGYH/data/a4553c25d/032a5e7331ac47efb689cbe50f25bf99/FLAG92479a553 [2021-11-03 05:36:36,546 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c2957f-58e5-4056-aa58-3516df435876/bin/utaipan-aC7eJsxGYH/data/a4553c25d/032a5e7331ac47efb689cbe50f25bf99 [2021-11-03 05:36:36,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:36:36,550 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:36:36,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:36:36,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:36:36,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:36:36,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:36:36" (1/1) ... [2021-11-03 05:36:36,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cf1e39a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:36:36, skipping insertion in model container [2021-11-03 05:36:36,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:36:36" (1/1) ... [2021-11-03 05:36:36,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:36:36,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:36:39,082 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_73c2957f-58e5-4056-aa58-3516df435876/sv-benchmarks/c/eca-rers2012/Problem06_label34.c[336423,336436] [2021-11-03 05:36:39,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:36:39,114 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:36:40,282 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_73c2957f-58e5-4056-aa58-3516df435876/sv-benchmarks/c/eca-rers2012/Problem06_label34.c[336423,336436] [2021-11-03 05:36:40,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:36:40,343 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:36:40,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:36:40 WrapperNode [2021-11-03 05:36:40,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:36:40,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:36:40,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:36:40,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:36:40,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:36:40" (1/1) ... [2021-11-03 05:36:40,487 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:36:40" (1/1) ... [2021-11-03 05:36:40,979 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:36:40,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:36:40,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:36:40,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:36:40,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:36:40" (1/1) ... [2021-11-03 05:36:40,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:36:40" (1/1) ... [2021-11-03 05:36:41,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:36:40" (1/1) ... [2021-11-03 05:36:41,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:36:40" (1/1) ... [2021-11-03 05:36:41,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:36:40" (1/1) ... [2021-11-03 05:36:41,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:36:40" (1/1) ... [2021-11-03 05:36:41,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:36:40" (1/1) ... [2021-11-03 05:36:41,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:36:41,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:36:41,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:36:41,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:36:41,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:36:40" (1/1) ... [2021-11-03 05:36:41,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:36:41,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c2957f-58e5-4056-aa58-3516df435876/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:36:41,676 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c2957f-58e5-4056-aa58-3516df435876/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:36:41,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73c2957f-58e5-4056-aa58-3516df435876/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:36:41,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:36:41,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:36:41,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:36:41,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:36:50,888 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:36:50,888 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-03 05:36:50,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:36:50 BoogieIcfgContainer [2021-11-03 05:36:50,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:36:51,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:36:51,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:36:51,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:36:51,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:36:36" (1/3) ... [2021-11-03 05:36:51,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b709ea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:36:51, skipping insertion in model container [2021-11-03 05:36:51,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:36:40" (2/3) ... [2021-11-03 05:36:51,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b709ea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:36:51, skipping insertion in model container [2021-11-03 05:36:51,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:36:50" (3/3) ... [2021-11-03 05:36:51,015 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label34.c [2021-11-03 05:36:51,020 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:36:51,020 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:36:51,083 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:36:51,089 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 [2021-11-03 05:36:51,089 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:36:51,130 INFO L276 IsEmpty]: Start isEmpty. Operand has 938 states, 936 states have (on average 1.9914529914529915) internal successors, (1864), 937 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:36:51,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 930 [2021-11-03 05:36:51,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:36:51,195 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] [2021-11-03 05:36:51,195 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:36:51,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:36:51,201 INFO L85 PathProgramCache]: Analyzing trace with hash -2092635968, now seen corresponding path program 1 times [2021-11-03 05:36:51,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:36:51,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571719591] [2021-11-03 05:36:51,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:36:51,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:36:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:36:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:36:52,732 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:36:52,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571719591] [2021-11-03 05:36:52,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571719591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:36:52,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:36:52,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:36:52,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827759761] [2021-11-03 05:36:52,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:36:52,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:36:52,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:36:52,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:36:52,767 INFO L87 Difference]: Start difference. First operand has 938 states, 936 states have (on average 1.9914529914529915) internal successors, (1864), 937 states have internal predecessors, (1864), 0 states have call successors, (0), 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 309.6666666666667) internal successors, (929), 2 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:36:57,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:36:57,351 INFO L93 Difference]: Finished difference Result 2810 states and 5588 transitions. [2021-11-03 05:36:57,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:36:57,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 309.6666666666667) internal successors, (929), 2 states have internal predecessors, (929), 0 states have call successors, (0), 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 929 [2021-11-03 05:36:57,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:36:57,398 INFO L225 Difference]: With dead ends: 2810 [2021-11-03 05:36:57,398 INFO L226 Difference]: Without dead ends: 1869 [2021-11-03 05:36:57,406 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 [2021-11-03 05:36:57,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-11-03 05:36:57,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1869. [2021-11-03 05:36:57,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.7826552462526766) internal successors, (3330), 1868 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:36:57,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 3330 transitions. [2021-11-03 05:36:57,542 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 3330 transitions. Word has length 929 [2021-11-03 05:36:57,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:36:57,545 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 3330 transitions. [2021-11-03 05:36:57,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 309.6666666666667) internal successors, (929), 2 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:36:57,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 3330 transitions. [2021-11-03 05:36:57,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 938 [2021-11-03 05:36:57,585 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:36:57,586 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 05:36:57,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:36:57,587 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:36:57,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:36:57,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1773950179, now seen corresponding path program 1 times [2021-11-03 05:36:57,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:36:57,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231791776] [2021-11-03 05:36:57,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:36:57,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:36:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:36:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:36:57,978 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:36:57,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231791776] [2021-11-03 05:36:57,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231791776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:36:57,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:36:57,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:36:57,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060320134] [2021-11-03 05:36:57,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:36:57,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:36:57,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:36:57,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:36:57,986 INFO L87 Difference]: Start difference. First operand 1869 states and 3330 transitions. Second operand has 3 states, 3 states have (on average 312.3333333333333) internal successors, (937), 2 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:02,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:37:02,341 INFO L93 Difference]: Finished difference Result 4670 states and 8145 transitions. [2021-11-03 05:37:02,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:37:02,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 312.3333333333333) internal successors, (937), 2 states have internal predecessors, (937), 0 states have call successors, (0), 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 937 [2021-11-03 05:37:02,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:37:02,363 INFO L225 Difference]: With dead ends: 4670 [2021-11-03 05:37:02,363 INFO L226 Difference]: Without dead ends: 2802 [2021-11-03 05:37:02,367 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 [2021-11-03 05:37:02,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2802 states. [2021-11-03 05:37:02,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2802 to 2802. [2021-11-03 05:37:02,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2801 states have (on average 1.6465548018564797) internal successors, (4612), 2801 states have internal predecessors, (4612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:02,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 4612 transitions. [2021-11-03 05:37:02,501 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 4612 transitions. Word has length 937 [2021-11-03 05:37:02,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:37:02,502 INFO L470 AbstractCegarLoop]: Abstraction has 2802 states and 4612 transitions. [2021-11-03 05:37:02,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.3333333333333) internal successors, (937), 2 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:02,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 4612 transitions. [2021-11-03 05:37:02,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 940 [2021-11-03 05:37:02,523 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:37:02,524 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 05:37:02,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 05:37:02,525 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:37:02,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:37:02,527 INFO L85 PathProgramCache]: Analyzing trace with hash -926901342, now seen corresponding path program 1 times [2021-11-03 05:37:02,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:37:02,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487787875] [2021-11-03 05:37:02,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:37:02,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:37:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:37:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:37:02,857 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:37:02,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487787875] [2021-11-03 05:37:02,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487787875] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:37:02,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:37:02,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:37:02,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036471355] [2021-11-03 05:37:02,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:37:02,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:37:02,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:37:02,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:37:02,862 INFO L87 Difference]: Start difference. First operand 2802 states and 4612 transitions. Second operand has 3 states, 3 states have (on average 313.0) internal successors, (939), 2 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:07,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:37:07,221 INFO L93 Difference]: Finished difference Result 8402 states and 13833 transitions. [2021-11-03 05:37:07,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:37:07,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 313.0) internal successors, (939), 2 states have internal predecessors, (939), 0 states have call successors, (0), 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 939 [2021-11-03 05:37:07,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:37:07,255 INFO L225 Difference]: With dead ends: 8402 [2021-11-03 05:37:07,255 INFO L226 Difference]: Without dead ends: 5601 [2021-11-03 05:37:07,259 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 [2021-11-03 05:37:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-11-03 05:37:07,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 5601. [2021-11-03 05:37:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5601 states, 5600 states have (on average 1.6296428571428572) internal successors, (9126), 5600 states have internal predecessors, (9126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:07,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5601 states to 5601 states and 9126 transitions. [2021-11-03 05:37:07,384 INFO L78 Accepts]: Start accepts. Automaton has 5601 states and 9126 transitions. Word has length 939 [2021-11-03 05:37:07,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:37:07,385 INFO L470 AbstractCegarLoop]: Abstraction has 5601 states and 9126 transitions. [2021-11-03 05:37:07,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 313.0) internal successors, (939), 2 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:07,386 INFO L276 IsEmpty]: Start isEmpty. Operand 5601 states and 9126 transitions. [2021-11-03 05:37:07,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 942 [2021-11-03 05:37:07,405 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:37:07,406 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-03 05:37:07,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 05:37:07,406 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:37:07,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:37:07,407 INFO L85 PathProgramCache]: Analyzing trace with hash 814288580, now seen corresponding path program 1 times [2021-11-03 05:37:07,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:37:07,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792642121] [2021-11-03 05:37:07,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:37:07,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:37:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:37:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-03 05:37:07,680 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:37:07,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792642121] [2021-11-03 05:37:07,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792642121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:37:07,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:37:07,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:37:07,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114754397] [2021-11-03 05:37:07,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:37:07,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:37:07,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:37:07,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:37:07,684 INFO L87 Difference]: Start difference. First operand 5601 states and 9126 transitions. Second operand has 3 states, 3 states have (on average 311.3333333333333) internal successors, (934), 2 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:09,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:37:09,014 INFO L93 Difference]: Finished difference Result 16801 states and 27376 transitions. [2021-11-03 05:37:09,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:37:09,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 311.3333333333333) internal successors, (934), 2 states have internal predecessors, (934), 0 states have call successors, (0), 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 941 [2021-11-03 05:37:09,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:37:09,073 INFO L225 Difference]: With dead ends: 16801 [2021-11-03 05:37:09,074 INFO L226 Difference]: Without dead ends: 11201 [2021-11-03 05:37:09,083 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 [2021-11-03 05:37:09,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11201 states. [2021-11-03 05:37:09,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11201 to 11199. [2021-11-03 05:37:09,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11199 states, 11198 states have (on average 1.6267190569744596) internal successors, (18216), 11198 states have internal predecessors, (18216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:09,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11199 states to 11199 states and 18216 transitions. [2021-11-03 05:37:09,337 INFO L78 Accepts]: Start accepts. Automaton has 11199 states and 18216 transitions. Word has length 941 [2021-11-03 05:37:09,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:37:09,337 INFO L470 AbstractCegarLoop]: Abstraction has 11199 states and 18216 transitions. [2021-11-03 05:37:09,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 311.3333333333333) internal successors, (934), 2 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:09,338 INFO L276 IsEmpty]: Start isEmpty. Operand 11199 states and 18216 transitions. [2021-11-03 05:37:09,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 954 [2021-11-03 05:37:09,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:37:09,370 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:37:09,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 05:37:09,370 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:37:09,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:37:09,371 INFO L85 PathProgramCache]: Analyzing trace with hash 328895071, now seen corresponding path program 1 times [2021-11-03 05:37:09,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:37:09,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191292678] [2021-11-03 05:37:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:37:09,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:37:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:37:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-03 05:37:09,629 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:37:09,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191292678] [2021-11-03 05:37:09,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191292678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:37:09,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:37:09,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:37:09,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221307681] [2021-11-03 05:37:09,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:37:09,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:37:09,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:37:09,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:37:09,633 INFO L87 Difference]: Start difference. First operand 11199 states and 18216 transitions. Second operand has 3 states, 3 states have (on average 315.3333333333333) internal successors, (946), 2 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:13,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:37:13,206 INFO L93 Difference]: Finished difference Result 33593 states and 54645 transitions. [2021-11-03 05:37:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:37:13,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 315.3333333333333) internal successors, (946), 2 states have internal predecessors, (946), 0 states have call successors, (0), 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 953 [2021-11-03 05:37:13,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:37:13,271 INFO L225 Difference]: With dead ends: 33593 [2021-11-03 05:37:13,272 INFO L226 Difference]: Without dead ends: 22395 [2021-11-03 05:37:13,287 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 [2021-11-03 05:37:13,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22395 states. [2021-11-03 05:37:13,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22395 to 22395. [2021-11-03 05:37:13,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22395 states, 22394 states have (on average 1.4763776011431633) internal successors, (33062), 22394 states have internal predecessors, (33062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:13,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22395 states to 22395 states and 33062 transitions. [2021-11-03 05:37:13,935 INFO L78 Accepts]: Start accepts. Automaton has 22395 states and 33062 transitions. Word has length 953 [2021-11-03 05:37:13,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:37:13,935 INFO L470 AbstractCegarLoop]: Abstraction has 22395 states and 33062 transitions. [2021-11-03 05:37:13,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 315.3333333333333) internal successors, (946), 2 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 22395 states and 33062 transitions. [2021-11-03 05:37:13,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1004 [2021-11-03 05:37:13,993 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:37:13,994 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:37:13,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 05:37:13,994 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:37:13,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:37:13,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1454950676, now seen corresponding path program 1 times [2021-11-03 05:37:13,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:37:13,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348198683] [2021-11-03 05:37:13,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:37:13,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:37:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:37:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-03 05:37:14,318 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:37:14,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348198683] [2021-11-03 05:37:14,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348198683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:37:14,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:37:14,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:37:14,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552216238] [2021-11-03 05:37:14,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:37:14,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:37:14,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:37:14,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:37:14,322 INFO L87 Difference]: Start difference. First operand 22395 states and 33062 transitions. Second operand has 3 states, 3 states have (on average 323.3333333333333) internal successors, (970), 2 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:18,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:37:18,323 INFO L93 Difference]: Finished difference Result 67181 states and 99183 transitions. [2021-11-03 05:37:18,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:37:18,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 323.3333333333333) internal successors, (970), 2 states have internal predecessors, (970), 0 states have call successors, (0), 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 1003 [2021-11-03 05:37:18,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:37:18,427 INFO L225 Difference]: With dead ends: 67181 [2021-11-03 05:37:18,427 INFO L226 Difference]: Without dead ends: 44787 [2021-11-03 05:37:18,455 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 [2021-11-03 05:37:18,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44787 states. [2021-11-03 05:37:19,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44787 to 44787. [2021-11-03 05:37:19,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44787 states, 44786 states have (on average 1.3671683115259232) internal successors, (61230), 44786 states have internal predecessors, (61230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:19,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44787 states to 44787 states and 61230 transitions. [2021-11-03 05:37:19,307 INFO L78 Accepts]: Start accepts. Automaton has 44787 states and 61230 transitions. Word has length 1003 [2021-11-03 05:37:19,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:37:19,308 INFO L470 AbstractCegarLoop]: Abstraction has 44787 states and 61230 transitions. [2021-11-03 05:37:19,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 323.3333333333333) internal successors, (970), 2 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:19,309 INFO L276 IsEmpty]: Start isEmpty. Operand 44787 states and 61230 transitions. [2021-11-03 05:37:19,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1008 [2021-11-03 05:37:19,557 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:37:19,558 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:37:19,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 05:37:19,559 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:37:19,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:37:19,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1123421989, now seen corresponding path program 1 times [2021-11-03 05:37:19,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:37:19,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678205315] [2021-11-03 05:37:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:37:19,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:37:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:37:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-03 05:37:19,900 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:37:19,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678205315] [2021-11-03 05:37:19,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678205315] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:37:19,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:37:19,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:37:19,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098353969] [2021-11-03 05:37:19,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:37:19,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:37:19,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:37:19,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:37:19,904 INFO L87 Difference]: Start difference. First operand 44787 states and 61230 transitions. Second operand has 3 states, 3 states have (on average 313.3333333333333) internal successors, (940), 2 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:24,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:37:24,522 INFO L93 Difference]: Finished difference Result 134357 states and 183687 transitions. [2021-11-03 05:37:24,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:37:24,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 313.3333333333333) internal successors, (940), 2 states have internal predecessors, (940), 0 states have call successors, (0), 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 1007 [2021-11-03 05:37:24,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:37:24,686 INFO L225 Difference]: With dead ends: 134357 [2021-11-03 05:37:24,686 INFO L226 Difference]: Without dead ends: 89571 [2021-11-03 05:37:24,730 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 [2021-11-03 05:37:24,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89571 states. [2021-11-03 05:37:26,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89571 to 89571. [2021-11-03 05:37:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89571 states, 89570 states have (on average 1.3313832756503294) internal successors, (119252), 89570 states have internal predecessors, (119252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:26,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89571 states to 89571 states and 119252 transitions. [2021-11-03 05:37:26,524 INFO L78 Accepts]: Start accepts. Automaton has 89571 states and 119252 transitions. Word has length 1007 [2021-11-03 05:37:26,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:37:26,525 INFO L470 AbstractCegarLoop]: Abstraction has 89571 states and 119252 transitions. [2021-11-03 05:37:26,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 313.3333333333333) internal successors, (940), 2 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:26,526 INFO L276 IsEmpty]: Start isEmpty. Operand 89571 states and 119252 transitions. [2021-11-03 05:37:26,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1040 [2021-11-03 05:37:26,687 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:37:26,688 INFO L513 BasicCegarLoop]: trace histogram [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, 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] [2021-11-03 05:37:26,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 05:37:26,689 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:37:26,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:37:26,690 INFO L85 PathProgramCache]: Analyzing trace with hash 2046150556, now seen corresponding path program 1 times [2021-11-03 05:37:26,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:37:26,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427298091] [2021-11-03 05:37:26,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:37:26,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:37:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:37:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-03 05:37:27,279 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:37:27,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427298091] [2021-11-03 05:37:27,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427298091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:37:27,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:37:27,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:37:27,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432662242] [2021-11-03 05:37:27,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:37:27,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:37:27,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:37:27,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:37:27,283 INFO L87 Difference]: Start difference. First operand 89571 states and 119252 transitions. Second operand has 3 states, 3 states have (on average 325.0) internal successors, (975), 2 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:31,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:37:31,366 INFO L93 Difference]: Finished difference Result 223927 states and 293788 transitions. [2021-11-03 05:37:31,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:37:31,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 325.0) internal successors, (975), 2 states have internal predecessors, (975), 0 states have call successors, (0), 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 1039 [2021-11-03 05:37:31,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:37:31,569 INFO L225 Difference]: With dead ends: 223927 [2021-11-03 05:37:31,569 INFO L226 Difference]: Without dead ends: 134357 [2021-11-03 05:37:31,618 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 [2021-11-03 05:37:31,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134357 states. [2021-11-03 05:37:33,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134357 to 134355. [2021-11-03 05:37:33,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134355 states, 134354 states have (on average 1.2966640367983089) internal successors, (174212), 134354 states have internal predecessors, (174212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:34,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134355 states to 134355 states and 174212 transitions. [2021-11-03 05:37:34,194 INFO L78 Accepts]: Start accepts. Automaton has 134355 states and 174212 transitions. Word has length 1039 [2021-11-03 05:37:34,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:37:34,195 INFO L470 AbstractCegarLoop]: Abstraction has 134355 states and 174212 transitions. [2021-11-03 05:37:34,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 325.0) internal successors, (975), 2 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:34,195 INFO L276 IsEmpty]: Start isEmpty. Operand 134355 states and 174212 transitions. [2021-11-03 05:37:34,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1042 [2021-11-03 05:37:34,355 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:37:34,356 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:37:34,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 05:37:34,357 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:37:34,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:37:34,358 INFO L85 PathProgramCache]: Analyzing trace with hash 273215512, now seen corresponding path program 1 times [2021-11-03 05:37:34,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:37:34,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758552635] [2021-11-03 05:37:34,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:37:34,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:37:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:37:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-03 05:37:35,159 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:37:35,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758552635] [2021-11-03 05:37:35,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758552635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:37:35,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:37:35,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:37:35,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817655077] [2021-11-03 05:37:35,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:37:35,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:37:35,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:37:35,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:37:35,170 INFO L87 Difference]: Start difference. First operand 134355 states and 174212 transitions. Second operand has 3 states, 3 states have (on average 318.0) internal successors, (954), 2 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:39,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:37:39,967 INFO L93 Difference]: Finished difference Result 347081 states and 449904 transitions. [2021-11-03 05:37:39,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:37:39,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 318.0) internal successors, (954), 2 states have internal predecessors, (954), 0 states have call successors, (0), 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 1041 [2021-11-03 05:37:39,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:37:40,288 INFO L225 Difference]: With dead ends: 347081 [2021-11-03 05:37:40,288 INFO L226 Difference]: Without dead ends: 212727 [2021-11-03 05:37:40,343 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 [2021-11-03 05:37:40,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212727 states. [2021-11-03 05:37:43,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212727 to 212727. [2021-11-03 05:37:43,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212727 states, 212726 states have (on average 1.2663896279721332) internal successors, (269394), 212726 states have internal predecessors, (269394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:44,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212727 states to 212727 states and 269394 transitions. [2021-11-03 05:37:44,030 INFO L78 Accepts]: Start accepts. Automaton has 212727 states and 269394 transitions. Word has length 1041 [2021-11-03 05:37:44,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:37:44,031 INFO L470 AbstractCegarLoop]: Abstraction has 212727 states and 269394 transitions. [2021-11-03 05:37:44,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 318.0) internal successors, (954), 2 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:44,032 INFO L276 IsEmpty]: Start isEmpty. Operand 212727 states and 269394 transitions. [2021-11-03 05:37:44,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1058 [2021-11-03 05:37:44,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:37:44,163 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-11-03 05:37:44,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 05:37:44,164 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:37:44,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:37:44,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1631983428, now seen corresponding path program 1 times [2021-11-03 05:37:44,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:37:44,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484618311] [2021-11-03 05:37:44,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:37:44,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:37:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:37:44,523 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:37:44,524 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:37:44,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484618311] [2021-11-03 05:37:44,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484618311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:37:44,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:37:44,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:37:44,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846328914] [2021-11-03 05:37:44,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:37:44,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:37:44,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:37:44,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:37:44,528 INFO L87 Difference]: Start difference. First operand 212727 states and 269394 transitions. Second operand has 3 states, 3 states have (on average 328.0) internal successors, (984), 2 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:50,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:37:50,818 INFO L93 Difference]: Finished difference Result 613919 states and 777681 transitions. [2021-11-03 05:37:50,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:37:50,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 328.0) internal successors, (984), 2 states have internal predecessors, (984), 0 states have call successors, (0), 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 1057 [2021-11-03 05:37:50,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:37:52,005 INFO L225 Difference]: With dead ends: 613919 [2021-11-03 05:37:52,005 INFO L226 Difference]: Without dead ends: 401193 [2021-11-03 05:37:52,144 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 [2021-11-03 05:37:52,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401193 states. [2021-11-03 05:37:57,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401193 to 401193. [2021-11-03 05:37:57,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401193 states, 401192 states have (on average 1.2123496979002573) internal successors, (486385), 401192 states have internal predecessors, (486385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:59,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401193 states to 401193 states and 486385 transitions. [2021-11-03 05:37:59,047 INFO L78 Accepts]: Start accepts. Automaton has 401193 states and 486385 transitions. Word has length 1057 [2021-11-03 05:37:59,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:37:59,047 INFO L470 AbstractCegarLoop]: Abstraction has 401193 states and 486385 transitions. [2021-11-03 05:37:59,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 328.0) internal successors, (984), 2 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:37:59,048 INFO L276 IsEmpty]: Start isEmpty. Operand 401193 states and 486385 transitions. [2021-11-03 05:37:59,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1078 [2021-11-03 05:37:59,312 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:37:59,313 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-11-03 05:37:59,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 05:37:59,314 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:37:59,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:37:59,315 INFO L85 PathProgramCache]: Analyzing trace with hash -2020970591, now seen corresponding path program 1 times [2021-11-03 05:37:59,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:37:59,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904929359] [2021-11-03 05:37:59,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:37:59,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:37:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:37:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-03 05:37:59,653 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:37:59,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904929359] [2021-11-03 05:37:59,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904929359] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:37:59,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:37:59,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:37:59,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284469599] [2021-11-03 05:37:59,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:37:59,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:37:59,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:37:59,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:37:59,658 INFO L87 Difference]: Start difference. First operand 401193 states and 486385 transitions. Second operand has 3 states, 3 states have (on average 334.0) internal successors, (1002), 2 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)