./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.4.ufo.UNBOUNDED.pals.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_1c6f25b6-4d6b-492e-9115-7c55780742a8/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f25b6-4d6b-492e-9115-7c55780742a8/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_1c6f25b6-4d6b-492e-9115-7c55780742a8/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f25b6-4d6b-492e-9115-7c55780742a8/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.4.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f25b6-4d6b-492e-9115-7c55780742a8/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_1c6f25b6-4d6b-492e-9115-7c55780742a8/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 bff75d9656e36398f3860eeb63dc9d2c0a8396d28a082e4ac99a64913f1f2573 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:29:09,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:29:09,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:29:09,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:29:09,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:29:09,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:29:09,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:29:09,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:29:09,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:29:09,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:29:09,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:29:09,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:29:09,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:29:09,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:29:09,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:29:09,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:29:09,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:29:09,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:29:09,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:29:09,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:29:09,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:29:09,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:29:09,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:29:09,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:29:09,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:29:09,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:29:09,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:29:09,701 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:29:09,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:29:09,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:29:09,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:29:09,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:29:09,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:29:09,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:29:09,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:29:09,715 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:29:09,716 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:29:09,716 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:29:09,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:29:09,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:29:09,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:29:09,721 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f25b6-4d6b-492e-9115-7c55780742a8/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:29:09,762 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:29:09,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:29:09,763 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:29:09,763 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:29:09,763 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:29:09,763 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:29:09,763 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:29:09,764 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:29:09,764 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:29:09,764 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:29:09,764 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:29:09,764 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:29:09,765 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:29:09,765 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:29:09,765 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:29:09,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:29:09,766 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:29:09,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:29:09,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:29:09,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:29:09,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:29:09,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:29:09,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:29:09,767 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:29:09,767 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:29:09,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:29:09,768 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:29:09,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:29:09,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:29:09,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:29:09,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:29:09,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:29:09,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:29:09,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:29:09,769 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:29:09,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:29:09,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:29:09,770 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:29:09,770 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:29:09,770 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_1c6f25b6-4d6b-492e-9115-7c55780742a8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f25b6-4d6b-492e-9115-7c55780742a8/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bff75d9656e36398f3860eeb63dc9d2c0a8396d28a082e4ac99a64913f1f2573 [2021-11-03 05:29:10,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:29:10,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:29:10,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:29:10,063 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:29:10,063 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:29:10,064 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f25b6-4d6b-492e-9115-7c55780742a8/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.4.ufo.UNBOUNDED.pals.c [2021-11-03 05:29:10,138 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f25b6-4d6b-492e-9115-7c55780742a8/bin/utaipan-aC7eJsxGYH/data/bbf823c8d/739e353435394bf983e7a1d80d64f043/FLAGf91ab8f06 [2021-11-03 05:29:10,782 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:29:10,782 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f25b6-4d6b-492e-9115-7c55780742a8/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.4.ufo.UNBOUNDED.pals.c [2021-11-03 05:29:10,800 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f25b6-4d6b-492e-9115-7c55780742a8/bin/utaipan-aC7eJsxGYH/data/bbf823c8d/739e353435394bf983e7a1d80d64f043/FLAGf91ab8f06 [2021-11-03 05:29:11,003 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f25b6-4d6b-492e-9115-7c55780742a8/bin/utaipan-aC7eJsxGYH/data/bbf823c8d/739e353435394bf983e7a1d80d64f043 [2021-11-03 05:29:11,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:29:11,006 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:29:11,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:29:11,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:29:11,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:29:11,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:29:11" (1/1) ... [2021-11-03 05:29:11,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70d1174f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:29:11, skipping insertion in model container [2021-11-03 05:29:11,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:29:11" (1/1) ... [2021-11-03 05:29:11,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:29:11,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:29:11,586 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_1c6f25b6-4d6b-492e-9115-7c55780742a8/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.4.ufo.UNBOUNDED.pals.c[65679,65692] [2021-11-03 05:29:11,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:29:11,607 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:29:11,754 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_1c6f25b6-4d6b-492e-9115-7c55780742a8/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.4.ufo.UNBOUNDED.pals.c[65679,65692] [2021-11-03 05:29:11,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:29:11,772 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:29:11,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:29:11 WrapperNode [2021-11-03 05:29:11,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:29:11,774 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:29:11,774 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:29:11,774 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:29:11,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:29:11" (1/1) ... [2021-11-03 05:29:11,826 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:29:11" (1/1) ... [2021-11-03 05:29:11,921 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:29:11,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:29:11,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:29:11,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:29:11,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:29:11" (1/1) ... [2021-11-03 05:29:11,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:29:11" (1/1) ... [2021-11-03 05:29:11,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:29:11" (1/1) ... [2021-11-03 05:29:11,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:29:11" (1/1) ... [2021-11-03 05:29:11,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:29:11" (1/1) ... [2021-11-03 05:29:12,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:29:11" (1/1) ... [2021-11-03 05:29:12,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:29:11" (1/1) ... [2021-11-03 05:29:12,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:29:12,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:29:12,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:29:12,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:29:12,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:29:11" (1/1) ... [2021-11-03 05:29:12,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:29:12,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f25b6-4d6b-492e-9115-7c55780742a8/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:29:12,106 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f25b6-4d6b-492e-9115-7c55780742a8/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:29:12,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f25b6-4d6b-492e-9115-7c55780742a8/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:29:12,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:29:12,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:29:12,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:29:12,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:29:20,393 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:29:20,393 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-11-03 05:29:20,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:29:20 BoogieIcfgContainer [2021-11-03 05:29:20,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:29:20,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:29:20,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:29:20,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:29:20,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:29:11" (1/3) ... [2021-11-03 05:29:20,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c8bb65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:29:20, skipping insertion in model container [2021-11-03 05:29:20,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:29:11" (2/3) ... [2021-11-03 05:29:20,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c8bb65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:29:20, skipping insertion in model container [2021-11-03 05:29:20,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:29:20" (3/3) ... [2021-11-03 05:29:20,408 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.UNBOUNDED.pals.c [2021-11-03 05:29:20,418 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:29:20,418 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:29:20,483 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:29:20,493 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 05:29:20,493 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:29:20,530 INFO L276 IsEmpty]: Start isEmpty. Operand has 440 states, 438 states have (on average 1.7191780821917808) internal successors, (753), 439 states have internal predecessors, (753), 0 states have call successors, (0), 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 05:29:20,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-03 05:29:20,566 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:29:20,567 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] [2021-11-03 05:29:20,567 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:29:20,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:29:20,578 INFO L85 PathProgramCache]: Analyzing trace with hash -2102645795, now seen corresponding path program 1 times [2021-11-03 05:29:20,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:29:20,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394854759] [2021-11-03 05:29:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:29:20,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:29:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:29:23,320 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 05:29:23,321 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:29:23,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394854759] [2021-11-03 05:29:23,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394854759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:29:23,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:29:23,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:29:23,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299035311] [2021-11-03 05:29:23,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:29:23,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:29:23,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:29:23,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:29:23,358 INFO L87 Difference]: Start difference. First operand has 440 states, 438 states have (on average 1.7191780821917808) internal successors, (753), 439 states have internal predecessors, (753), 0 states have call successors, (0), 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 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 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 05:29:23,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:29:23,588 INFO L93 Difference]: Finished difference Result 477 states and 819 transitions. [2021-11-03 05:29:23,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:29:23,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2021-11-03 05:29:23,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:29:23,611 INFO L225 Difference]: With dead ends: 477 [2021-11-03 05:29:23,611 INFO L226 Difference]: Without dead ends: 458 [2021-11-03 05:29:23,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:29:23,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-03 05:29:23,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 449. [2021-11-03 05:29:23,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.7142857142857142) internal successors, (768), 448 states have internal predecessors, (768), 0 states have call successors, (0), 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 05:29:23,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 768 transitions. [2021-11-03 05:29:23,710 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 768 transitions. Word has length 126 [2021-11-03 05:29:23,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:29:23,711 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 768 transitions. [2021-11-03 05:29:23,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 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 05:29:23,711 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 768 transitions. [2021-11-03 05:29:23,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-03 05:29:23,717 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:29:23,718 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] [2021-11-03 05:29:23,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:29:23,719 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:29:23,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:29:23,719 INFO L85 PathProgramCache]: Analyzing trace with hash -831166134, now seen corresponding path program 1 times [2021-11-03 05:29:23,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:29:23,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223579074] [2021-11-03 05:29:23,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:29:23,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:29:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:29:25,193 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 05:29:25,193 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:29:25,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223579074] [2021-11-03 05:29:25,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223579074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:29:25,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:29:25,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:29:25,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589509348] [2021-11-03 05:29:25,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:29:25,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:29:25,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:29:25,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:29:25,198 INFO L87 Difference]: Start difference. First operand 449 states and 768 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:29:25,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:29:25,351 INFO L93 Difference]: Finished difference Result 480 states and 816 transitions. [2021-11-03 05:29:25,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:29:25,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-03 05:29:25,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:29:25,357 INFO L225 Difference]: With dead ends: 480 [2021-11-03 05:29:25,357 INFO L226 Difference]: Without dead ends: 460 [2021-11-03 05:29:25,358 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:29:25,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-03 05:29:25,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 449. [2021-11-03 05:29:25,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.7120535714285714) internal successors, (767), 448 states have internal predecessors, (767), 0 states have call successors, (0), 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 05:29:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 767 transitions. [2021-11-03 05:29:25,380 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 767 transitions. Word has length 127 [2021-11-03 05:29:25,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:29:25,381 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 767 transitions. [2021-11-03 05:29:25,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:29:25,382 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 767 transitions. [2021-11-03 05:29:25,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-03 05:29:25,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:29:25,388 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] [2021-11-03 05:29:25,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 05:29:25,388 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:29:25,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:29:25,389 INFO L85 PathProgramCache]: Analyzing trace with hash -64550554, now seen corresponding path program 1 times [2021-11-03 05:29:25,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:29:25,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461773190] [2021-11-03 05:29:25,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:29:25,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:29:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:29:26,972 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 05:29:26,973 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:29:26,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461773190] [2021-11-03 05:29:26,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461773190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:29:26,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:29:26,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:29:26,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8375098] [2021-11-03 05:29:26,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:29:26,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:29:26,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:29:26,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:29:26,990 INFO L87 Difference]: Start difference. First operand 449 states and 767 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 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 05:29:27,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:29:27,174 INFO L93 Difference]: Finished difference Result 480 states and 815 transitions. [2021-11-03 05:29:27,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:29:27,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 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 128 [2021-11-03 05:29:27,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:29:27,179 INFO L225 Difference]: With dead ends: 480 [2021-11-03 05:29:27,179 INFO L226 Difference]: Without dead ends: 460 [2021-11-03 05:29:27,180 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:29:27,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-03 05:29:27,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 449. [2021-11-03 05:29:27,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.7098214285714286) internal successors, (766), 448 states have internal predecessors, (766), 0 states have call successors, (0), 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 05:29:27,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 766 transitions. [2021-11-03 05:29:27,205 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 766 transitions. Word has length 128 [2021-11-03 05:29:27,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:29:27,206 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 766 transitions. [2021-11-03 05:29:27,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 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 05:29:27,207 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 766 transitions. [2021-11-03 05:29:27,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-03 05:29:27,216 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:29:27,216 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] [2021-11-03 05:29:27,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 05:29:27,217 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:29:27,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:29:27,218 INFO L85 PathProgramCache]: Analyzing trace with hash -2063819597, now seen corresponding path program 1 times [2021-11-03 05:29:27,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:29:27,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384805729] [2021-11-03 05:29:27,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:29:27,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:29:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:29:28,170 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 05:29:28,171 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:29:28,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384805729] [2021-11-03 05:29:28,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384805729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:29:28,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:29:28,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:29:28,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605292679] [2021-11-03 05:29:28,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:29:28,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:29:28,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:29:28,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:29:28,174 INFO L87 Difference]: Start difference. First operand 449 states and 766 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 05:29:28,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:29:28,343 INFO L93 Difference]: Finished difference Result 480 states and 814 transitions. [2021-11-03 05:29:28,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:29:28,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2021-11-03 05:29:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:29:28,347 INFO L225 Difference]: With dead ends: 480 [2021-11-03 05:29:28,347 INFO L226 Difference]: Without dead ends: 460 [2021-11-03 05:29:28,348 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:29:28,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-03 05:29:28,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 449. [2021-11-03 05:29:28,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.7075892857142858) internal successors, (765), 448 states have internal predecessors, (765), 0 states have call successors, (0), 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 05:29:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 765 transitions. [2021-11-03 05:29:28,363 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 765 transitions. Word has length 129 [2021-11-03 05:29:28,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:29:28,364 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 765 transitions. [2021-11-03 05:29:28,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 05:29:28,364 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 765 transitions. [2021-11-03 05:29:28,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-03 05:29:28,366 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:29:28,367 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] [2021-11-03 05:29:28,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 05:29:28,367 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:29:28,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:29:28,368 INFO L85 PathProgramCache]: Analyzing trace with hash 388801263, now seen corresponding path program 1 times [2021-11-03 05:29:28,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:29:28,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870360853] [2021-11-03 05:29:28,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:29:28,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:29:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:29:29,197 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 05:29:29,197 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:29:29,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870360853] [2021-11-03 05:29:29,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870360853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:29:29,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:29:29,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:29:29,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913375052] [2021-11-03 05:29:29,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:29:29,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:29:29,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:29:29,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:29:29,200 INFO L87 Difference]: Start difference. First operand 449 states and 765 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 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 05:29:29,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:29:29,361 INFO L93 Difference]: Finished difference Result 480 states and 813 transitions. [2021-11-03 05:29:29,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:29:29,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-11-03 05:29:29,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:29:29,365 INFO L225 Difference]: With dead ends: 480 [2021-11-03 05:29:29,365 INFO L226 Difference]: Without dead ends: 460 [2021-11-03 05:29:29,365 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:29:29,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-03 05:29:29,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 449. [2021-11-03 05:29:29,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.7053571428571428) internal successors, (764), 448 states have internal predecessors, (764), 0 states have call successors, (0), 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 05:29:29,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 764 transitions. [2021-11-03 05:29:29,410 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 764 transitions. Word has length 130 [2021-11-03 05:29:29,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:29:29,410 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 764 transitions. [2021-11-03 05:29:29,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 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 05:29:29,411 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 764 transitions. [2021-11-03 05:29:29,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-03 05:29:29,413 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:29:29,413 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] [2021-11-03 05:29:29,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 05:29:29,414 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:29:29,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:29:29,415 INFO L85 PathProgramCache]: Analyzing trace with hash -883911652, now seen corresponding path program 1 times [2021-11-03 05:29:29,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:29:29,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140625916] [2021-11-03 05:29:29,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:29:29,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:29:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:29:30,218 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 05:29:30,221 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:29:30,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140625916] [2021-11-03 05:29:30,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140625916] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:29:30,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:29:30,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 05:29:30,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736896480] [2021-11-03 05:29:30,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:29:30,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:29:30,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:29:30,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:29:30,225 INFO L87 Difference]: Start difference. First operand 449 states and 764 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 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 05:29:30,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:29:30,491 INFO L93 Difference]: Finished difference Result 485 states and 817 transitions. [2021-11-03 05:29:30,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:29:30,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-11-03 05:29:30,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:29:30,495 INFO L225 Difference]: With dead ends: 485 [2021-11-03 05:29:30,495 INFO L226 Difference]: Without dead ends: 465 [2021-11-03 05:29:30,496 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:29:30,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-11-03 05:29:30,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 449. [2021-11-03 05:29:30,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.703125) internal successors, (763), 448 states have internal predecessors, (763), 0 states have call successors, (0), 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 05:29:30,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 763 transitions. [2021-11-03 05:29:30,511 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 763 transitions. Word has length 131 [2021-11-03 05:29:30,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:29:30,511 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 763 transitions. [2021-11-03 05:29:30,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 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 05:29:30,512 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 763 transitions. [2021-11-03 05:29:30,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-03 05:29:30,514 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:29:30,514 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] [2021-11-03 05:29:30,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 05:29:30,515 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:29:30,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:29:30,515 INFO L85 PathProgramCache]: Analyzing trace with hash -512894044, now seen corresponding path program 1 times [2021-11-03 05:29:30,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:29:30,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139182743] [2021-11-03 05:29:30,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:29:30,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:29:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:29:31,531 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 05:29:31,531 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:29:31,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139182743] [2021-11-03 05:29:31,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139182743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:29:31,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:29:31,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:29:31,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505952777] [2021-11-03 05:29:31,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:29:31,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:29:31,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:29:31,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:29:31,535 INFO L87 Difference]: Start difference. First operand 449 states and 763 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:29:31,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:29:31,683 INFO L93 Difference]: Finished difference Result 478 states and 808 transitions. [2021-11-03 05:29:31,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:29:31,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-03 05:29:31,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:29:31,687 INFO L225 Difference]: With dead ends: 478 [2021-11-03 05:29:31,687 INFO L226 Difference]: Without dead ends: 458 [2021-11-03 05:29:31,688 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:29:31,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-03 05:29:31,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 450. [2021-11-03 05:29:31,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7015590200445434) internal successors, (764), 449 states have internal predecessors, (764), 0 states have call successors, (0), 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 05:29:31,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 764 transitions. [2021-11-03 05:29:31,710 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 764 transitions. Word has length 133 [2021-11-03 05:29:31,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:29:31,710 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 764 transitions. [2021-11-03 05:29:31,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:29:31,711 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 764 transitions. [2021-11-03 05:29:31,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 05:29:31,713 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:29:31,713 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] [2021-11-03 05:29:31,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 05:29:31,714 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:29:31,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:29:31,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1192108838, now seen corresponding path program 1 times [2021-11-03 05:29:31,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:29:31,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226822389] [2021-11-03 05:29:31,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:29:31,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:29:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:29:32,605 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 05:29:32,605 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:29:32,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226822389] [2021-11-03 05:29:32,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226822389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:29:32,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:29:32,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:29:32,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980584391] [2021-11-03 05:29:32,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:29:32,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:29:32,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:29:32,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:29:32,609 INFO L87 Difference]: Start difference. First operand 450 states and 764 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:29:32,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:29:32,740 INFO L93 Difference]: Finished difference Result 479 states and 809 transitions. [2021-11-03 05:29:32,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:29:32,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-03 05:29:32,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:29:32,745 INFO L225 Difference]: With dead ends: 479 [2021-11-03 05:29:32,745 INFO L226 Difference]: Without dead ends: 459 [2021-11-03 05:29:32,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:29:32,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-11-03 05:29:32,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 452. [2021-11-03 05:29:32,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.6962305986696231) internal successors, (765), 451 states have internal predecessors, (765), 0 states have call successors, (0), 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 05:29:32,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 765 transitions. [2021-11-03 05:29:32,768 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 765 transitions. Word has length 134 [2021-11-03 05:29:32,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:29:32,769 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 765 transitions. [2021-11-03 05:29:32,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:29:32,770 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 765 transitions. [2021-11-03 05:29:32,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-03 05:29:32,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:29:32,773 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] [2021-11-03 05:29:32,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 05:29:32,773 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:29:32,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:29:32,774 INFO L85 PathProgramCache]: Analyzing trace with hash 370339436, now seen corresponding path program 1 times [2021-11-03 05:29:32,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:29:32,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583894284] [2021-11-03 05:29:32,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:29:32,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:29:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:29:33,846 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 05:29:33,846 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:29:33,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583894284] [2021-11-03 05:29:33,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583894284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:29:33,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:29:33,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:29:33,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706540919] [2021-11-03 05:29:33,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:29:33,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:29:33,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:29:33,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:29:33,858 INFO L87 Difference]: Start difference. First operand 452 states and 765 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:29:34,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:29:34,011 INFO L93 Difference]: Finished difference Result 479 states and 806 transitions. [2021-11-03 05:29:34,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:29:34,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-03 05:29:34,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:29:34,016 INFO L225 Difference]: With dead ends: 479 [2021-11-03 05:29:34,016 INFO L226 Difference]: Without dead ends: 459 [2021-11-03 05:29:34,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:29:34,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-11-03 05:29:34,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 453. [2021-11-03 05:29:34,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.6946902654867257) internal successors, (766), 452 states have internal predecessors, (766), 0 states have call successors, (0), 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 05:29:34,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 766 transitions. [2021-11-03 05:29:34,036 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 766 transitions. Word has length 136 [2021-11-03 05:29:34,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:29:34,036 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 766 transitions. [2021-11-03 05:29:34,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:29:34,037 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 766 transitions. [2021-11-03 05:29:34,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-03 05:29:34,039 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:29:34,039 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] [2021-11-03 05:29:34,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 05:29:34,040 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:29:34,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:29:34,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1408681853, now seen corresponding path program 1 times [2021-11-03 05:29:34,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:29:34,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491239878] [2021-11-03 05:29:34,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:29:34,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:29:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:29:34,285 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 05:29:34,286 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:29:34,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491239878] [2021-11-03 05:29:34,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491239878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:29:34,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:29:34,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 05:29:34,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642306995] [2021-11-03 05:29:34,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:29:34,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:29:34,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:29:34,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:29:34,289 INFO L87 Difference]: Start difference. First operand 453 states and 766 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 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 05:29:34,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:29:34,662 INFO L93 Difference]: Finished difference Result 501 states and 843 transitions. [2021-11-03 05:29:34,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:29:34,663 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 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 137 [2021-11-03 05:29:34,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:29:34,666 INFO L225 Difference]: With dead ends: 501 [2021-11-03 05:29:34,669 INFO L226 Difference]: Without dead ends: 481 [2021-11-03 05:29:34,669 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:29:34,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-11-03 05:29:34,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 456. [2021-11-03 05:29:34,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.687912087912088) internal successors, (768), 455 states have internal predecessors, (768), 0 states have call successors, (0), 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 05:29:34,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 768 transitions. [2021-11-03 05:29:34,691 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 768 transitions. Word has length 137 [2021-11-03 05:29:34,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:29:34,692 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 768 transitions. [2021-11-03 05:29:34,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 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 05:29:34,693 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 768 transitions. [2021-11-03 05:29:34,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-03 05:29:34,695 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:29:34,696 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:29:34,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 05:29:34,697 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:29:34,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:29:34,697 INFO L85 PathProgramCache]: Analyzing trace with hash -837242229, now seen corresponding path program 1 times [2021-11-03 05:29:34,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:29:34,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828891007] [2021-11-03 05:29:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:29:34,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:29:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:29:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:29:38,540 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:29:38,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828891007] [2021-11-03 05:29:38,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828891007] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:29:38,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862444418] [2021-11-03 05:29:38,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:29:38,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:29:38,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f25b6-4d6b-492e-9115-7c55780742a8/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:29:38,543 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f25b6-4d6b-492e-9115-7c55780742a8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:29:38,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f25b6-4d6b-492e-9115-7c55780742a8/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 05:29:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:29:38,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-03 05:29:39,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:30:19,901 WARN L207 SmtUtils]: Spent 5.97 s on a formula simplification that was a NOOP. DAG size: 527 [2021-11-03 05:34:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:57,344 INFO L328 TraceCheckSpWp]: Computing backward predicates...