./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF --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 f335fc064cc60cd164eea089db3c8b8685d81b0842015215c5c6d2ca6e9ee077 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:28:12,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:28:12,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:28:12,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:28:12,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:28:12,752 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:28:12,754 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:28:12,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:28:12,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:28:12,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:28:12,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:28:12,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:28:12,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:28:12,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:28:12,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:28:12,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:28:12,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:28:12,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:28:12,772 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:28:12,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:28:12,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:28:12,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:28:12,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:28:12,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:28:12,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:28:12,788 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:28:12,788 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:28:12,789 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:28:12,790 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:28:12,791 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:28:12,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:28:12,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:28:12,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:28:12,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:28:12,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:28:12,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:28:12,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:28:12,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:28:12,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:28:12,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:28:12,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:28:12,802 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:28:12,849 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:28:12,850 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:28:12,851 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:28:12,852 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:28:12,852 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:28:12,852 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:28:12,852 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:28:12,853 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:28:12,853 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:28:12,853 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:28:12,861 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:28:12,861 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:28:12,861 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:28:12,862 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:28:12,862 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:28:12,862 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:28:12,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:28:12,863 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:28:12,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:28:12,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:28:12,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:28:12,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:28:12,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:28:12,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:28:12,864 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:28:12,865 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:28:12,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:28:12,865 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:28:12,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:28:12,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:28:12,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:28:12,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:28:12,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:28:12,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:28:12,867 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:28:12,867 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:28:12,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:28:12,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:28:12,867 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:28:12,868 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:28:12,868 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_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f335fc064cc60cd164eea089db3c8b8685d81b0842015215c5c6d2ca6e9ee077 [2021-11-13 02:28:13,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:28:13,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:28:13,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:28:13,171 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:28:13,171 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:28:13,173 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-13 02:28:13,237 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/data/b8ddc1824/e9afeb72dbbd447d88e7c265d04013a7/FLAGfd9ca646a [2021-11-13 02:28:13,706 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:28:13,707 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-13 02:28:13,723 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/data/b8ddc1824/e9afeb72dbbd447d88e7c265d04013a7/FLAGfd9ca646a [2021-11-13 02:28:14,049 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/data/b8ddc1824/e9afeb72dbbd447d88e7c265d04013a7 [2021-11-13 02:28:14,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:28:14,053 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:28:14,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:28:14,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:28:14,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:28:14,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:28:14" (1/1) ... [2021-11-13 02:28:14,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6305583a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:14, skipping insertion in model container [2021-11-13 02:28:14,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:28:14" (1/1) ... [2021-11-13 02:28:14,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:28:14,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:28:14,388 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_c5eaa594-234a-4c60-96ff-defadcf7eb6b/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7347,7360] [2021-11-13 02:28:14,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:28:14,436 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:28:14,517 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_c5eaa594-234a-4c60-96ff-defadcf7eb6b/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7347,7360] [2021-11-13 02:28:14,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:28:14,560 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:28:14,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:14 WrapperNode [2021-11-13 02:28:14,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:28:14,562 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:28:14,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:28:14,562 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:28:14,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:14" (1/1) ... [2021-11-13 02:28:14,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:14" (1/1) ... [2021-11-13 02:28:14,638 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:28:14,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:28:14,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:28:14,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:28:14,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:14" (1/1) ... [2021-11-13 02:28:14,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:14" (1/1) ... [2021-11-13 02:28:14,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:14" (1/1) ... [2021-11-13 02:28:14,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:14" (1/1) ... [2021-11-13 02:28:14,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:14" (1/1) ... [2021-11-13 02:28:14,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:14" (1/1) ... [2021-11-13 02:28:14,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:14" (1/1) ... [2021-11-13 02:28:14,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:28:14,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:28:14,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:28:14,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:28:14,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:14" (1/1) ... [2021-11-13 02:28:14,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:28:14,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:28:14,744 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:28:14,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:28:14,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 02:28:14,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:28:14,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:28:14,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:28:15,877 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:28:15,877 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 02:28:15,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:28:15 BoogieIcfgContainer [2021-11-13 02:28:15,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:28:15,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:28:15,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:28:15,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:28:15,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:28:14" (1/3) ... [2021-11-13 02:28:15,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623f169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:28:15, skipping insertion in model container [2021-11-13 02:28:15,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:14" (2/3) ... [2021-11-13 02:28:15,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623f169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:28:15, skipping insertion in model container [2021-11-13 02:28:15,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:28:15" (3/3) ... [2021-11-13 02:28:15,890 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-13 02:28:15,895 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:28:15,895 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:28:15,946 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:28:15,954 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 [2021-11-13 02:28:15,954 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:28:15,971 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 84 states have (on average 1.7619047619047619) internal successors, (148), 85 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:15,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 02:28:15,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:15,980 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:15,980 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:15,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:15,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1768052657, now seen corresponding path program 1 times [2021-11-13 02:28:15,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:15,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048228693] [2021-11-13 02:28:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:15,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:28:16,382 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:16,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048228693] [2021-11-13 02:28:16,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048228693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:16,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:16,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:28:16,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982778771] [2021-11-13 02:28:16,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:16,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:28:16,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:16,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:28:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:28:16,424 INFO L87 Difference]: Start difference. First operand has 86 states, 84 states have (on average 1.7619047619047619) internal successors, (148), 85 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:16,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:16,539 INFO L93 Difference]: Finished difference Result 188 states and 311 transitions. [2021-11-13 02:28:16,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:28:16,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-11-13 02:28:16,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:16,560 INFO L225 Difference]: With dead ends: 188 [2021-11-13 02:28:16,560 INFO L226 Difference]: Without dead ends: 127 [2021-11-13 02:28:16,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:28:16,569 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 91 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.50ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.63ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:16,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 318 Invalid, 20 Unknown, 0 Unchecked, 4.50ms Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 59.63ms Time] [2021-11-13 02:28:16,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-13 02:28:16,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-11-13 02:28:16,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.5) internal successors, (186), 124 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:16,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 186 transitions. [2021-11-13 02:28:16,616 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 186 transitions. Word has length 37 [2021-11-13 02:28:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:16,617 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 186 transitions. [2021-11-13 02:28:16,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:16,617 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 186 transitions. [2021-11-13 02:28:16,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-13 02:28:16,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:16,619 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:16,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 02:28:16,620 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:16,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:16,621 INFO L85 PathProgramCache]: Analyzing trace with hash 938619083, now seen corresponding path program 1 times [2021-11-13 02:28:16,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:16,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590794113] [2021-11-13 02:28:16,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:16,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:28:16,744 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:16,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590794113] [2021-11-13 02:28:16,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590794113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:16,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:16,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:28:16,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724417118] [2021-11-13 02:28:16,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:16,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:28:16,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:16,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:28:16,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:28:16,747 INFO L87 Difference]: Start difference. First operand 125 states and 186 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:16,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:16,867 INFO L93 Difference]: Finished difference Result 276 states and 431 transitions. [2021-11-13 02:28:16,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:28:16,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-11-13 02:28:16,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:16,875 INFO L225 Difference]: With dead ends: 276 [2021-11-13 02:28:16,876 INFO L226 Difference]: Without dead ends: 180 [2021-11-13 02:28:16,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:28:16,882 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 81 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.76ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 80.71ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:16,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 192 Invalid, 25 Unknown, 0 Unchecked, 2.76ms Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 80.71ms Time] [2021-11-13 02:28:16,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-13 02:28:16,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2021-11-13 02:28:16,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.5197740112994351) internal successors, (269), 177 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:16,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 269 transitions. [2021-11-13 02:28:16,912 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 269 transitions. Word has length 39 [2021-11-13 02:28:16,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:16,912 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 269 transitions. [2021-11-13 02:28:16,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:16,913 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 269 transitions. [2021-11-13 02:28:16,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 02:28:16,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:16,915 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:16,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 02:28:16,915 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:16,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:16,916 INFO L85 PathProgramCache]: Analyzing trace with hash 2080335096, now seen corresponding path program 1 times [2021-11-13 02:28:16,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:16,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509936091] [2021-11-13 02:28:16,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:16,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:28:17,018 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:17,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509936091] [2021-11-13 02:28:17,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509936091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:17,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:17,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:28:17,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614699757] [2021-11-13 02:28:17,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:17,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:28:17,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:17,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:28:17,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:28:17,025 INFO L87 Difference]: Start difference. First operand 178 states and 269 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:17,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:17,120 INFO L93 Difference]: Finished difference Result 438 states and 690 transitions. [2021-11-13 02:28:17,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:28:17,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-11-13 02:28:17,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:17,124 INFO L225 Difference]: With dead ends: 438 [2021-11-13 02:28:17,125 INFO L226 Difference]: Without dead ends: 290 [2021-11-13 02:28:17,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:28:17,136 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 82 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.10ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.19ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:17,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 242 Invalid, 16 Unknown, 0 Unchecked, 4.10ms Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 39.19ms Time] [2021-11-13 02:28:17,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-13 02:28:17,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 288. [2021-11-13 02:28:17,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.5574912891986064) internal successors, (447), 287 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:17,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 447 transitions. [2021-11-13 02:28:17,192 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 447 transitions. Word has length 41 [2021-11-13 02:28:17,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:17,193 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 447 transitions. [2021-11-13 02:28:17,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:17,193 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 447 transitions. [2021-11-13 02:28:17,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-13 02:28:17,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:17,195 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:17,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 02:28:17,196 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:17,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:17,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1713059214, now seen corresponding path program 1 times [2021-11-13 02:28:17,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:17,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509357602] [2021-11-13 02:28:17,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:17,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:28:17,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:17,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509357602] [2021-11-13 02:28:17,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509357602] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:17,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:17,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:28:17,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369872170] [2021-11-13 02:28:17,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:17,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:28:17,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:17,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:28:17,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:28:17,285 INFO L87 Difference]: Start difference. First operand 288 states and 447 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:17,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:17,344 INFO L93 Difference]: Finished difference Result 707 states and 1122 transitions. [2021-11-13 02:28:17,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:28:17,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-11-13 02:28:17,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:17,349 INFO L225 Difference]: With dead ends: 707 [2021-11-13 02:28:17,349 INFO L226 Difference]: Without dead ends: 449 [2021-11-13 02:28:17,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:28:17,351 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 81 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.64ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.72ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:17,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 208 Invalid, 13 Unknown, 0 Unchecked, 2.64ms Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 32.72ms Time] [2021-11-13 02:28:17,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-11-13 02:28:17,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 447. [2021-11-13 02:28:17,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.5717488789237668) internal successors, (701), 446 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:17,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 701 transitions. [2021-11-13 02:28:17,383 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 701 transitions. Word has length 43 [2021-11-13 02:28:17,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:17,384 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 701 transitions. [2021-11-13 02:28:17,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:17,385 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 701 transitions. [2021-11-13 02:28:17,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 02:28:17,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:17,397 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:17,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 02:28:17,397 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:17,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:17,398 INFO L85 PathProgramCache]: Analyzing trace with hash -334539291, now seen corresponding path program 1 times [2021-11-13 02:28:17,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:17,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181509867] [2021-11-13 02:28:17,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:17,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:28:17,524 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:17,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181509867] [2021-11-13 02:28:17,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181509867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:17,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:17,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:28:17,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734543488] [2021-11-13 02:28:17,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:17,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:28:17,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:17,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:28:17,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:28:17,527 INFO L87 Difference]: Start difference. First operand 447 states and 701 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:17,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:17,616 INFO L93 Difference]: Finished difference Result 1147 states and 1834 transitions. [2021-11-13 02:28:17,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:28:17,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-11-13 02:28:17,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:17,625 INFO L225 Difference]: With dead ends: 1147 [2021-11-13 02:28:17,625 INFO L226 Difference]: Without dead ends: 743 [2021-11-13 02:28:17,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:28:17,627 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 77 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.78ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.29ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:17,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 223 Invalid, 16 Unknown, 0 Unchecked, 0.78ms Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 52.29ms Time] [2021-11-13 02:28:17,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-11-13 02:28:17,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 741. [2021-11-13 02:28:17,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 1.5837837837837838) internal successors, (1172), 740 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1172 transitions. [2021-11-13 02:28:17,675 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1172 transitions. Word has length 45 [2021-11-13 02:28:17,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:17,678 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 1172 transitions. [2021-11-13 02:28:17,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:17,679 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1172 transitions. [2021-11-13 02:28:17,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-13 02:28:17,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:17,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:17,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 02:28:17,681 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:17,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:17,689 INFO L85 PathProgramCache]: Analyzing trace with hash -312170093, now seen corresponding path program 1 times [2021-11-13 02:28:17,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:17,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632416573] [2021-11-13 02:28:17,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:17,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:17,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:28:17,776 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:17,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632416573] [2021-11-13 02:28:17,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632416573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:17,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:17,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:28:17,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175660887] [2021-11-13 02:28:17,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:17,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:28:17,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:17,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:28:17,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:28:17,779 INFO L87 Difference]: Start difference. First operand 741 states and 1172 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:17,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:17,898 INFO L93 Difference]: Finished difference Result 1856 states and 2966 transitions. [2021-11-13 02:28:17,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:28:17,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-11-13 02:28:17,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:17,906 INFO L225 Difference]: With dead ends: 1856 [2021-11-13 02:28:17,906 INFO L226 Difference]: Without dead ends: 1158 [2021-11-13 02:28:17,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:28:17,910 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 76 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.75ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.52ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:17,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 210 Invalid, 13 Unknown, 0 Unchecked, 0.75ms Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 32.52ms Time] [2021-11-13 02:28:17,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-11-13 02:28:17,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1156. [2021-11-13 02:28:17,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 1.587012987012987) internal successors, (1833), 1155 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:18,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1833 transitions. [2021-11-13 02:28:18,001 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1833 transitions. Word has length 47 [2021-11-13 02:28:18,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:18,002 INFO L470 AbstractCegarLoop]: Abstraction has 1156 states and 1833 transitions. [2021-11-13 02:28:18,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:18,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1833 transitions. [2021-11-13 02:28:18,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-13 02:28:18,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:18,006 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:18,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 02:28:18,006 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:18,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:18,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1501020928, now seen corresponding path program 1 times [2021-11-13 02:28:18,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:18,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153502012] [2021-11-13 02:28:18,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:18,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:28:18,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:18,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153502012] [2021-11-13 02:28:18,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153502012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:18,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:18,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 02:28:18,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307437761] [2021-11-13 02:28:18,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:18,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:28:18,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:18,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:28:18,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:28:18,123 INFO L87 Difference]: Start difference. First operand 1156 states and 1833 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:18,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:18,467 INFO L93 Difference]: Finished difference Result 2931 states and 4669 transitions. [2021-11-13 02:28:18,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:28:18,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2021-11-13 02:28:18,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:18,481 INFO L225 Difference]: With dead ends: 2931 [2021-11-13 02:28:18,482 INFO L226 Difference]: Without dead ends: 1831 [2021-11-13 02:28:18,484 INFO L932 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 [2021-11-13 02:28:18,485 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 456 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 137.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.06ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 171.20ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:18,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 806 Invalid, 139 Unknown, 0 Unchecked, 4.06ms Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 171.20ms Time] [2021-11-13 02:28:18,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-11-13 02:28:18,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1821. [2021-11-13 02:28:18,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1820 states have (on average 1.5785714285714285) internal successors, (2873), 1820 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:18,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2873 transitions. [2021-11-13 02:28:18,630 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2873 transitions. Word has length 49 [2021-11-13 02:28:18,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:18,631 INFO L470 AbstractCegarLoop]: Abstraction has 1821 states and 2873 transitions. [2021-11-13 02:28:18,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:18,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2873 transitions. [2021-11-13 02:28:18,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-13 02:28:18,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:18,633 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:18,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 02:28:18,633 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:18,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:18,636 INFO L85 PathProgramCache]: Analyzing trace with hash 650487300, now seen corresponding path program 1 times [2021-11-13 02:28:18,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:18,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342561965] [2021-11-13 02:28:18,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:18,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:28:18,690 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:18,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342561965] [2021-11-13 02:28:18,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342561965] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:18,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:18,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:28:18,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318055522] [2021-11-13 02:28:18,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:18,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:28:18,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:18,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:28:18,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:28:18,692 INFO L87 Difference]: Start difference. First operand 1821 states and 2873 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:18,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:18,880 INFO L93 Difference]: Finished difference Result 3588 states and 5679 transitions. [2021-11-13 02:28:18,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:28:18,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-11-13 02:28:18,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:18,891 INFO L225 Difference]: With dead ends: 3588 [2021-11-13 02:28:18,892 INFO L226 Difference]: Without dead ends: 1823 [2021-11-13 02:28:18,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:28:18,895 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 152 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.29ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63.03ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:18,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 299 Invalid, 43 Unknown, 0 Unchecked, 1.29ms Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 63.03ms Time] [2021-11-13 02:28:18,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-11-13 02:28:19,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1821. [2021-11-13 02:28:19,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1820 states have (on average 1.571978021978022) internal successors, (2861), 1820 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:19,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2861 transitions. [2021-11-13 02:28:19,051 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2861 transitions. Word has length 50 [2021-11-13 02:28:19,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:19,051 INFO L470 AbstractCegarLoop]: Abstraction has 1821 states and 2861 transitions. [2021-11-13 02:28:19,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:19,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2861 transitions. [2021-11-13 02:28:19,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 02:28:19,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:19,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:19,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 02:28:19,052 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:19,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:19,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1367676345, now seen corresponding path program 1 times [2021-11-13 02:28:19,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:19,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672271032] [2021-11-13 02:28:19,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:19,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:28:19,099 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:19,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672271032] [2021-11-13 02:28:19,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672271032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:19,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:19,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:28:19,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092944262] [2021-11-13 02:28:19,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:19,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:28:19,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:19,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:28:19,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:28:19,101 INFO L87 Difference]: Start difference. First operand 1821 states and 2861 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:19,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:19,278 INFO L93 Difference]: Finished difference Result 3588 states and 5655 transitions. [2021-11-13 02:28:19,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:28:19,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-11-13 02:28:19,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:19,290 INFO L225 Difference]: With dead ends: 3588 [2021-11-13 02:28:19,290 INFO L226 Difference]: Without dead ends: 1823 [2021-11-13 02:28:19,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:28:19,294 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 160 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.21ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.88ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:19,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 305 Invalid, 44 Unknown, 0 Unchecked, 1.21ms Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 53.88ms Time] [2021-11-13 02:28:19,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-11-13 02:28:19,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1821. [2021-11-13 02:28:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1820 states have (on average 1.5653846153846154) internal successors, (2849), 1820 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:19,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2849 transitions. [2021-11-13 02:28:19,451 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2849 transitions. Word has length 51 [2021-11-13 02:28:19,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:19,451 INFO L470 AbstractCegarLoop]: Abstraction has 1821 states and 2849 transitions. [2021-11-13 02:28:19,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:19,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2849 transitions. [2021-11-13 02:28:19,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-13 02:28:19,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:19,452 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:19,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 02:28:19,452 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:19,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:19,453 INFO L85 PathProgramCache]: Analyzing trace with hash 498318123, now seen corresponding path program 1 times [2021-11-13 02:28:19,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:19,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177436672] [2021-11-13 02:28:19,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:19,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:28:19,498 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:19,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177436672] [2021-11-13 02:28:19,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177436672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:19,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:19,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:28:19,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698141943] [2021-11-13 02:28:19,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:19,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:28:19,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:19,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:28:19,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:28:19,500 INFO L87 Difference]: Start difference. First operand 1821 states and 2849 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:19,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:19,692 INFO L93 Difference]: Finished difference Result 3588 states and 5631 transitions. [2021-11-13 02:28:19,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:28:19,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-11-13 02:28:19,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:19,704 INFO L225 Difference]: With dead ends: 3588 [2021-11-13 02:28:19,704 INFO L226 Difference]: Without dead ends: 1823 [2021-11-13 02:28:19,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:28:19,708 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 158 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.31ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.96ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:19,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 308 Invalid, 43 Unknown, 0 Unchecked, 1.31ms Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 52.96ms Time] [2021-11-13 02:28:19,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-11-13 02:28:19,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1821. [2021-11-13 02:28:19,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1820 states have (on average 1.5587912087912088) internal successors, (2837), 1820 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:19,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2837 transitions. [2021-11-13 02:28:19,855 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2837 transitions. Word has length 52 [2021-11-13 02:28:19,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:19,856 INFO L470 AbstractCegarLoop]: Abstraction has 1821 states and 2837 transitions. [2021-11-13 02:28:19,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:19,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2837 transitions. [2021-11-13 02:28:19,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-13 02:28:19,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:19,857 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:19,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 02:28:19,857 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:19,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:19,858 INFO L85 PathProgramCache]: Analyzing trace with hash 625035068, now seen corresponding path program 1 times [2021-11-13 02:28:19,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:19,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873069336] [2021-11-13 02:28:19,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:19,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:28:19,958 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:19,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873069336] [2021-11-13 02:28:19,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873069336] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:19,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:19,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 02:28:19,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783209278] [2021-11-13 02:28:19,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:19,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:28:19,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:19,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:28:19,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:28:19,960 INFO L87 Difference]: Start difference. First operand 1821 states and 2837 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:20,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:20,183 INFO L93 Difference]: Finished difference Result 3588 states and 5607 transitions. [2021-11-13 02:28:20,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:28:20,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-11-13 02:28:20,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:20,195 INFO L225 Difference]: With dead ends: 3588 [2021-11-13 02:28:20,195 INFO L226 Difference]: Without dead ends: 1823 [2021-11-13 02:28:20,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:28:20,199 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 245 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.55ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.80ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:20,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 294 Invalid, 59 Unknown, 0 Unchecked, 1.55ms Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 84.80ms Time] [2021-11-13 02:28:20,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-11-13 02:28:20,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1821. [2021-11-13 02:28:20,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1820 states have (on average 1.5543956043956044) internal successors, (2829), 1820 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:20,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2829 transitions. [2021-11-13 02:28:20,333 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2829 transitions. Word has length 54 [2021-11-13 02:28:20,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:20,333 INFO L470 AbstractCegarLoop]: Abstraction has 1821 states and 2829 transitions. [2021-11-13 02:28:20,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:20,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2829 transitions. [2021-11-13 02:28:20,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 02:28:20,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:20,334 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:20,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 02:28:20,335 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:20,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:20,335 INFO L85 PathProgramCache]: Analyzing trace with hash -312065607, now seen corresponding path program 1 times [2021-11-13 02:28:20,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:20,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310642346] [2021-11-13 02:28:20,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:20,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:28:20,427 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:20,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310642346] [2021-11-13 02:28:20,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310642346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:20,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:20,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 02:28:20,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357515650] [2021-11-13 02:28:20,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:20,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:28:20,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:20,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:28:20,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:28:20,430 INFO L87 Difference]: Start difference. First operand 1821 states and 2829 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:20,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:20,718 INFO L93 Difference]: Finished difference Result 4565 states and 7090 transitions. [2021-11-13 02:28:20,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:28:20,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-11-13 02:28:20,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:20,734 INFO L225 Difference]: With dead ends: 4565 [2021-11-13 02:28:20,735 INFO L226 Difference]: Without dead ends: 2800 [2021-11-13 02:28:20,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:28:20,738 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 120 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.48ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.17ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:20,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 411 Invalid, 62 Unknown, 0 Unchecked, 1.48ms Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 78.17ms Time] [2021-11-13 02:28:20,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2021-11-13 02:28:20,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 2798. [2021-11-13 02:28:20,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 1.543081873435824) internal successors, (4316), 2797 states have internal predecessors, (4316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:20,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 4316 transitions. [2021-11-13 02:28:20,927 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 4316 transitions. Word has length 57 [2021-11-13 02:28:20,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:20,927 INFO L470 AbstractCegarLoop]: Abstraction has 2798 states and 4316 transitions. [2021-11-13 02:28:20,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:20,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 4316 transitions. [2021-11-13 02:28:20,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 02:28:20,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:20,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:20,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 02:28:20,929 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:20,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:20,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1074717730, now seen corresponding path program 1 times [2021-11-13 02:28:20,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:20,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911835381] [2021-11-13 02:28:20,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:20,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:28:21,056 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:21,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911835381] [2021-11-13 02:28:21,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911835381] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:21,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:21,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 02:28:21,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947739639] [2021-11-13 02:28:21,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:21,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:28:21,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:21,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:28:21,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:28:21,058 INFO L87 Difference]: Start difference. First operand 2798 states and 4316 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:21,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:21,454 INFO L93 Difference]: Finished difference Result 3454 states and 5289 transitions. [2021-11-13 02:28:21,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:28:21,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-11-13 02:28:21,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:21,477 INFO L225 Difference]: With dead ends: 3454 [2021-11-13 02:28:21,477 INFO L226 Difference]: Without dead ends: 3452 [2021-11-13 02:28:21,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:28:21,480 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 214 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.73ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 126.61ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:21,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 772 Invalid, 115 Unknown, 0 Unchecked, 2.73ms Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 126.61ms Time] [2021-11-13 02:28:21,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3452 states. [2021-11-13 02:28:21,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3452 to 2804. [2021-11-13 02:28:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2803 states have (on average 1.5397788084195505) internal successors, (4316), 2803 states have internal predecessors, (4316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:21,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 4316 transitions. [2021-11-13 02:28:21,757 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 4316 transitions. Word has length 58 [2021-11-13 02:28:21,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:21,757 INFO L470 AbstractCegarLoop]: Abstraction has 2804 states and 4316 transitions. [2021-11-13 02:28:21,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:21,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 4316 transitions. [2021-11-13 02:28:21,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 02:28:21,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:21,759 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:21,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 02:28:21,760 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:21,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:21,760 INFO L85 PathProgramCache]: Analyzing trace with hash -121591094, now seen corresponding path program 1 times [2021-11-13 02:28:21,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:21,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315997850] [2021-11-13 02:28:21,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:21,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:28:22,149 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:22,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315997850] [2021-11-13 02:28:22,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315997850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:22,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930021487] [2021-11-13 02:28:22,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:22,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:28:22,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:28:22,152 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:28:22,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 02:28:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:22,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 02:28:22,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:28:23,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 02:28:23,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930021487] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:23,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:28:23,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 6] total 16 [2021-11-13 02:28:23,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091039256] [2021-11-13 02:28:23,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:23,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:28:23,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:23,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:28:23,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:28:23,605 INFO L87 Difference]: Start difference. First operand 2804 states and 4316 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:24,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:24,269 INFO L93 Difference]: Finished difference Result 8121 states and 12542 transitions. [2021-11-13 02:28:24,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:28:24,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 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 65 [2021-11-13 02:28:24,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:24,325 INFO L225 Difference]: With dead ends: 8121 [2021-11-13 02:28:24,325 INFO L226 Difference]: Without dead ends: 5371 [2021-11-13 02:28:24,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:28:24,331 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 381 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.60ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.21ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:24,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 237 Invalid, 21 Unknown, 0 Unchecked, 1.60ms Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 44.21ms Time] [2021-11-13 02:28:24,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5371 states. [2021-11-13 02:28:24,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5371 to 5369. [2021-11-13 02:28:24,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5369 states, 5368 states have (on average 1.5357675111773472) internal successors, (8244), 5368 states have internal predecessors, (8244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:24,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5369 states to 5369 states and 8244 transitions. [2021-11-13 02:28:24,958 INFO L78 Accepts]: Start accepts. Automaton has 5369 states and 8244 transitions. Word has length 65 [2021-11-13 02:28:24,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:24,959 INFO L470 AbstractCegarLoop]: Abstraction has 5369 states and 8244 transitions. [2021-11-13 02:28:24,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:24,959 INFO L276 IsEmpty]: Start isEmpty. Operand 5369 states and 8244 transitions. [2021-11-13 02:28:24,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-13 02:28:24,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:24,961 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:25,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:25,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:28:25,177 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:25,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:25,178 INFO L85 PathProgramCache]: Analyzing trace with hash 2072853239, now seen corresponding path program 1 times [2021-11-13 02:28:25,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:25,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77641192] [2021-11-13 02:28:25,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:25,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:25,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 02:28:25,270 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:25,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77641192] [2021-11-13 02:28:25,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77641192] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:25,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:25,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:28:25,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611849053] [2021-11-13 02:28:25,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:25,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:28:25,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:25,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:28:25,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:28:25,276 INFO L87 Difference]: Start difference. First operand 5369 states and 8244 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:25,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:25,923 INFO L93 Difference]: Finished difference Result 10690 states and 16431 transitions. [2021-11-13 02:28:25,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:28:25,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 68 [2021-11-13 02:28:25,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:25,938 INFO L225 Difference]: With dead ends: 10690 [2021-11-13 02:28:25,938 INFO L226 Difference]: Without dead ends: 5369 [2021-11-13 02:28:25,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:28:25,948 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 285 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.22ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.81ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:25,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 104 Invalid, 38 Unknown, 0 Unchecked, 1.22ms Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 55.81ms Time] [2021-11-13 02:28:25,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5369 states. [2021-11-13 02:28:26,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5369 to 5369. [2021-11-13 02:28:26,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5369 states, 5368 states have (on average 1.5096870342771982) internal successors, (8104), 5368 states have internal predecessors, (8104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:26,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5369 states to 5369 states and 8104 transitions. [2021-11-13 02:28:26,531 INFO L78 Accepts]: Start accepts. Automaton has 5369 states and 8104 transitions. Word has length 68 [2021-11-13 02:28:26,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:26,531 INFO L470 AbstractCegarLoop]: Abstraction has 5369 states and 8104 transitions. [2021-11-13 02:28:26,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:26,532 INFO L276 IsEmpty]: Start isEmpty. Operand 5369 states and 8104 transitions. [2021-11-13 02:28:26,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-13 02:28:26,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:26,534 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:26,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 02:28:26,534 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:26,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:26,535 INFO L85 PathProgramCache]: Analyzing trace with hash 675897308, now seen corresponding path program 1 times [2021-11-13 02:28:26,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:26,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30995728] [2021-11-13 02:28:26,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:26,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:28:27,010 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:27,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30995728] [2021-11-13 02:28:27,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30995728] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:27,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636880737] [2021-11-13 02:28:27,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:27,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:28:27,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:28:27,012 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:28:27,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 02:28:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:27,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 02:28:27,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 02:28:27,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 02:28:28,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636880737] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:28,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:28:28,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 6] total 16 [2021-11-13 02:28:28,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360226674] [2021-11-13 02:28:28,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:28,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:28:28,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:28,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:28:28,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:28:28,416 INFO L87 Difference]: Start difference. First operand 5369 states and 8104 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:29,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:29,513 INFO L93 Difference]: Finished difference Result 15701 states and 23742 transitions. [2021-11-13 02:28:29,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:28:29,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 68 [2021-11-13 02:28:29,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:29,549 INFO L225 Difference]: With dead ends: 15701 [2021-11-13 02:28:29,549 INFO L226 Difference]: Without dead ends: 10391 [2021-11-13 02:28:29,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:28:29,559 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 261 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.82ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.91ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:29,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 279 Invalid, 25 Unknown, 0 Unchecked, 1.82ms Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 38.91ms Time] [2021-11-13 02:28:29,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10391 states. [2021-11-13 02:28:30,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10391 to 10389. [2021-11-13 02:28:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10389 states, 10388 states have (on average 1.5050057758952637) internal successors, (15634), 10388 states have internal predecessors, (15634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:30,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10389 states to 10389 states and 15634 transitions. [2021-11-13 02:28:30,537 INFO L78 Accepts]: Start accepts. Automaton has 10389 states and 15634 transitions. Word has length 68 [2021-11-13 02:28:30,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:30,537 INFO L470 AbstractCegarLoop]: Abstraction has 10389 states and 15634 transitions. [2021-11-13 02:28:30,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:30,537 INFO L276 IsEmpty]: Start isEmpty. Operand 10389 states and 15634 transitions. [2021-11-13 02:28:30,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-13 02:28:30,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:30,539 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:30,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:30,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 02:28:30,765 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:30,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:30,766 INFO L85 PathProgramCache]: Analyzing trace with hash -998789826, now seen corresponding path program 1 times [2021-11-13 02:28:30,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:30,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998296711] [2021-11-13 02:28:30,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:30,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:31,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:28:31,132 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:31,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998296711] [2021-11-13 02:28:31,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998296711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:31,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016234471] [2021-11-13 02:28:31,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:31,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:28:31,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:28:31,134 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:28:31,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 02:28:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:31,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 02:28:31,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:31,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 02:28:31,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 02:28:32,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016234471] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:32,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:28:32,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 6] total 16 [2021-11-13 02:28:32,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029394922] [2021-11-13 02:28:32,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:32,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:28:32,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:32,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:28:32,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:28:32,269 INFO L87 Difference]: Start difference. First operand 10389 states and 15634 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:34,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:34,236 INFO L93 Difference]: Finished difference Result 30110 states and 45346 transitions. [2021-11-13 02:28:34,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:28:34,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 71 [2021-11-13 02:28:34,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:34,299 INFO L225 Difference]: With dead ends: 30110 [2021-11-13 02:28:34,299 INFO L226 Difference]: Without dead ends: 19762 [2021-11-13 02:28:34,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:28:34,315 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 415 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.78ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.31ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:34,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 216 Invalid, 19 Unknown, 0 Unchecked, 1.78ms Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 33.31ms Time] [2021-11-13 02:28:34,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19762 states. [2021-11-13 02:28:36,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19762 to 19760. [2021-11-13 02:28:36,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19760 states, 19759 states have (on average 1.4936484639910927) internal successors, (29513), 19759 states have internal predecessors, (29513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:36,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19760 states to 19760 states and 29513 transitions. [2021-11-13 02:28:36,425 INFO L78 Accepts]: Start accepts. Automaton has 19760 states and 29513 transitions. Word has length 71 [2021-11-13 02:28:36,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:36,425 INFO L470 AbstractCegarLoop]: Abstraction has 19760 states and 29513 transitions. [2021-11-13 02:28:36,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:36,426 INFO L276 IsEmpty]: Start isEmpty. Operand 19760 states and 29513 transitions. [2021-11-13 02:28:36,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-13 02:28:36,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:36,429 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:36,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-13 02:28:36,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-13 02:28:36,645 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:36,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:36,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1982951365, now seen corresponding path program 1 times [2021-11-13 02:28:36,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:36,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131866664] [2021-11-13 02:28:36,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:36,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-13 02:28:36,722 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:36,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131866664] [2021-11-13 02:28:36,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131866664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:36,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:36,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:28:36,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332030367] [2021-11-13 02:28:36,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:36,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:28:36,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:36,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:28:36,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:28:36,725 INFO L87 Difference]: Start difference. First operand 19760 states and 29513 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:38,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:38,949 INFO L93 Difference]: Finished difference Result 39485 states and 58988 transitions. [2021-11-13 02:28:38,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:28:38,949 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 74 [2021-11-13 02:28:38,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:39,008 INFO L225 Difference]: With dead ends: 39485 [2021-11-13 02:28:39,009 INFO L226 Difference]: Without dead ends: 19760 [2021-11-13 02:28:39,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:28:39,031 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 286 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.19ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.31ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:39,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 102 Invalid, 36 Unknown, 0 Unchecked, 4.19ms Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 48.31ms Time] [2021-11-13 02:28:39,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19760 states. [2021-11-13 02:28:41,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19760 to 19760. [2021-11-13 02:28:41,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19760 states, 19759 states have (on average 1.4565008350625033) internal successors, (28779), 19759 states have internal predecessors, (28779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:41,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19760 states to 19760 states and 28779 transitions. [2021-11-13 02:28:41,327 INFO L78 Accepts]: Start accepts. Automaton has 19760 states and 28779 transitions. Word has length 74 [2021-11-13 02:28:41,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:41,328 INFO L470 AbstractCegarLoop]: Abstraction has 19760 states and 28779 transitions. [2021-11-13 02:28:41,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:41,329 INFO L276 IsEmpty]: Start isEmpty. Operand 19760 states and 28779 transitions. [2021-11-13 02:28:41,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-13 02:28:41,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:41,332 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:41,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 02:28:41,332 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:41,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:41,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1396909514, now seen corresponding path program 1 times [2021-11-13 02:28:41,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:41,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852224290] [2021-11-13 02:28:41,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:41,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:28:41,735 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:41,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852224290] [2021-11-13 02:28:41,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852224290] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:41,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826807375] [2021-11-13 02:28:41,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:41,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:28:41,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:28:41,741 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:28:41,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 02:28:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:41,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 02:28:41,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 02:28:43,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 02:28:43,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826807375] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:43,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:28:43,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 7] total 18 [2021-11-13 02:28:43,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068491278] [2021-11-13 02:28:43,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:43,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:28:43,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:43,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:28:43,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:28:43,843 INFO L87 Difference]: Start difference. First operand 19760 states and 28779 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:46,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:46,281 INFO L93 Difference]: Finished difference Result 34144 states and 49424 transitions. [2021-11-13 02:28:46,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:28:46,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 74 [2021-11-13 02:28:46,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:46,447 INFO L225 Difference]: With dead ends: 34144 [2021-11-13 02:28:46,447 INFO L226 Difference]: Without dead ends: 23814 [2021-11-13 02:28:46,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:28:46,462 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 325 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.87ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.62ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:46,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 224 Invalid, 22 Unknown, 0 Unchecked, 1.87ms Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 30.62ms Time] [2021-11-13 02:28:46,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23814 states. [2021-11-13 02:28:48,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23814 to 19782. [2021-11-13 02:28:48,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19782 states, 19781 states have (on average 1.4562458925231283) internal successors, (28806), 19781 states have internal predecessors, (28806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:49,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19782 states to 19782 states and 28806 transitions. [2021-11-13 02:28:49,023 INFO L78 Accepts]: Start accepts. Automaton has 19782 states and 28806 transitions. Word has length 74 [2021-11-13 02:28:49,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:49,023 INFO L470 AbstractCegarLoop]: Abstraction has 19782 states and 28806 transitions. [2021-11-13 02:28:49,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 19782 states and 28806 transitions. [2021-11-13 02:28:49,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-13 02:28:49,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:49,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:49,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:49,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:28:49,253 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:49,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:49,254 INFO L85 PathProgramCache]: Analyzing trace with hash -683962328, now seen corresponding path program 1 times [2021-11-13 02:28:49,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:49,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662749877] [2021-11-13 02:28:49,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:49,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:28:49,822 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:49,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662749877] [2021-11-13 02:28:49,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662749877] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:49,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199661518] [2021-11-13 02:28:49,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:49,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:28:49,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:28:49,824 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:28:49,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 02:28:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:49,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 02:28:49,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:50,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 02:28:50,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 02:28:51,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199661518] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:51,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:28:51,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 7] total 22 [2021-11-13 02:28:51,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470715034] [2021-11-13 02:28:51,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:51,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:28:51,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:51,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:28:51,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-11-13 02:28:51,628 INFO L87 Difference]: Start difference. First operand 19782 states and 28806 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:55,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:55,886 INFO L93 Difference]: Finished difference Result 46804 states and 68042 transitions. [2021-11-13 02:28:55,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:28:55,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 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 74 [2021-11-13 02:28:55,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:55,961 INFO L225 Difference]: With dead ends: 46804 [2021-11-13 02:28:55,961 INFO L226 Difference]: Without dead ends: 36674 [2021-11-13 02:28:55,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-11-13 02:28:55,979 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 366 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.54ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.44ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:55,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 424 Invalid, 48 Unknown, 0 Unchecked, 2.54ms Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 79.44ms Time] [2021-11-13 02:28:56,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36674 states. [2021-11-13 02:28:59,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36674 to 29360. [2021-11-13 02:28:59,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29360 states, 29359 states have (on average 1.4438843284853027) internal successors, (42391), 29359 states have internal predecessors, (42391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:59,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29360 states to 29360 states and 42391 transitions. [2021-11-13 02:28:59,517 INFO L78 Accepts]: Start accepts. Automaton has 29360 states and 42391 transitions. Word has length 74 [2021-11-13 02:28:59,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:59,518 INFO L470 AbstractCegarLoop]: Abstraction has 29360 states and 42391 transitions. [2021-11-13 02:28:59,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:28:59,518 INFO L276 IsEmpty]: Start isEmpty. Operand 29360 states and 42391 transitions. [2021-11-13 02:28:59,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-13 02:28:59,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:59,520 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:59,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:59,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:28:59,725 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:28:59,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:59,726 INFO L85 PathProgramCache]: Analyzing trace with hash 2140204086, now seen corresponding path program 1 times [2021-11-13 02:28:59,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:59,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608317785] [2021-11-13 02:28:59,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:59,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:29:00,004 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:29:00,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608317785] [2021-11-13 02:29:00,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608317785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:29:00,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159805807] [2021-11-13 02:29:00,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:00,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:29:00,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:29:00,006 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:29:00,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5eaa594-234a-4c60-96ff-defadcf7eb6b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 02:29:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:00,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-13 02:29:00,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 02:29:01,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:29:08,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159805807] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:29:08,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1023406148] [2021-11-13 02:29:08,420 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2021-11-13 02:29:08,421 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:29:08,426 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-13 02:29:08,433 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-13 02:29:08,434 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-13 02:29:08,715 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:29:08,718 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:29:08,720 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:29:08,721 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 02:29:08,722 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:29:08,726 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:29:08,726 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 02:29:08,727 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:29:08,728 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:29:08,731 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-13 02:29:08,731 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-13 02:29:08,732 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 02:29:08,733 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-13 02:29:08,745 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 772 [2021-11-13 02:29:08,760 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2021-11-13 02:29:13,034 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 262144 conjuctions. This might take some time...