./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.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_be966b3f-c602-4fb6-9160-98e877fe47f2/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be966b3f-c602-4fb6-9160-98e877fe47f2/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_be966b3f-c602-4fb6-9160-98e877fe47f2/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be966b3f-c602-4fb6-9160-98e877fe47f2/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be966b3f-c602-4fb6-9160-98e877fe47f2/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_be966b3f-c602-4fb6-9160-98e877fe47f2/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 e4ea09104fdfc6025836c8ea5917b899069d556f85aa19eff5395187d58ecb3d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:33:49,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:33:49,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:33:49,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:33:49,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:33:49,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:33:49,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:33:49,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:33:49,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:33:49,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:33:49,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:33:49,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:33:49,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:33:49,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:33:49,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:33:49,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:33:49,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:33:49,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:33:49,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:33:49,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:33:49,717 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:33:49,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:33:49,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:33:49,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:33:49,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:33:49,739 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:33:49,740 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:33:49,741 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:33:49,743 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:33:49,744 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:33:49,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:33:49,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:33:49,750 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:33:49,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:33:49,754 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:33:49,754 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:33:49,755 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:33:49,756 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:33:49,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:33:49,757 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:33:49,758 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:33:49,759 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be966b3f-c602-4fb6-9160-98e877fe47f2/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 01:33:49,815 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:33:49,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:33:49,818 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:33:49,818 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:33:49,818 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:33:49,819 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:33:49,819 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:33:49,819 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:33:49,819 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:33:49,820 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:33:49,821 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:33:49,821 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:33:49,821 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:33:49,822 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:33:49,822 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:33:49,822 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:33:49,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:33:49,823 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:33:49,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:33:49,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:33:49,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:33:49,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:33:49,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:33:49,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:33:49,824 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:33:49,825 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:33:49,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:33:49,825 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:33:49,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:33:49,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:33:49,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:33:49,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:33:49,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:33:49,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:33:49,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:33:49,826 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:33:49,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:33:49,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:33:49,827 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:33:49,827 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:33:49,827 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_be966b3f-c602-4fb6-9160-98e877fe47f2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be966b3f-c602-4fb6-9160-98e877fe47f2/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4ea09104fdfc6025836c8ea5917b899069d556f85aa19eff5395187d58ecb3d [2021-11-13 01:33:50,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:33:50,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:33:50,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:33:50,149 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:33:50,149 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:33:50,151 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be966b3f-c602-4fb6-9160-98e877fe47f2/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-13 01:33:50,247 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be966b3f-c602-4fb6-9160-98e877fe47f2/bin/utaipan-vmNK8stdcF/data/2a6640a30/9786276aed4d4aecb4d1d04476519d21/FLAG77f9ae6ec [2021-11-13 01:33:50,920 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:33:50,921 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be966b3f-c602-4fb6-9160-98e877fe47f2/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-13 01:33:50,951 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be966b3f-c602-4fb6-9160-98e877fe47f2/bin/utaipan-vmNK8stdcF/data/2a6640a30/9786276aed4d4aecb4d1d04476519d21/FLAG77f9ae6ec [2021-11-13 01:33:51,251 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be966b3f-c602-4fb6-9160-98e877fe47f2/bin/utaipan-vmNK8stdcF/data/2a6640a30/9786276aed4d4aecb4d1d04476519d21 [2021-11-13 01:33:51,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:33:51,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:33:51,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:33:51,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:33:51,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:33:51,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:33:51" (1/1) ... [2021-11-13 01:33:51,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1367ccc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:33:51, skipping insertion in model container [2021-11-13 01:33:51,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:33:51" (1/1) ... [2021-11-13 01:33:51,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:33:51,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:33:51,689 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_be966b3f-c602-4fb6-9160-98e877fe47f2/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[8640,8653] [2021-11-13 01:33:51,751 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:33:51,768 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:33:51,859 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_be966b3f-c602-4fb6-9160-98e877fe47f2/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[8640,8653] [2021-11-13 01:33:51,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:33:51,912 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:33:51,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:33:51 WrapperNode [2021-11-13 01:33:51,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:33:51,914 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:33:51,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:33:51,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:33:51,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:33:51" (1/1) ... [2021-11-13 01:33:51,938 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:33:51" (1/1) ... [2021-11-13 01:33:51,988 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:33:51,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:33:51,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:33:51,990 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:33:51,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:33:51" (1/1) ... [2021-11-13 01:33:51,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:33:51" (1/1) ... [2021-11-13 01:33:52,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:33:51" (1/1) ... [2021-11-13 01:33:52,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:33:51" (1/1) ... [2021-11-13 01:33:52,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:33:51" (1/1) ... [2021-11-13 01:33:52,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:33:51" (1/1) ... [2021-11-13 01:33:52,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:33:51" (1/1) ... [2021-11-13 01:33:52,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:33:52,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:33:52,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:33:52,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:33:52,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:33:51" (1/1) ... [2021-11-13 01:33:52,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:33:52,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be966b3f-c602-4fb6-9160-98e877fe47f2/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:33:52,120 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be966b3f-c602-4fb6-9160-98e877fe47f2/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:33:52,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be966b3f-c602-4fb6-9160-98e877fe47f2/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:33:52,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:33:52,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 01:33:52,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:33:52,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:33:53,418 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:33:53,419 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 01:33:53,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:33:53 BoogieIcfgContainer [2021-11-13 01:33:53,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:33:53,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:33:53,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:33:53,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:33:53,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:33:51" (1/3) ... [2021-11-13 01:33:53,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58518326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:33:53, skipping insertion in model container [2021-11-13 01:33:53,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:33:51" (2/3) ... [2021-11-13 01:33:53,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58518326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:33:53, skipping insertion in model container [2021-11-13 01:33:53,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:33:53" (3/3) ... [2021-11-13 01:33:53,434 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-13 01:33:53,441 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:33:53,442 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 01:33:53,505 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:33:53,514 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 01:33:53,515 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 01:33:53,539 INFO L276 IsEmpty]: Start isEmpty. Operand has 122 states, 120 states have (on average 1.7583333333333333) internal successors, (211), 121 states have internal predecessors, (211), 0 states have call successors, (0), 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 01:33:53,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-13 01:33:53,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:53,554 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:33:53,554 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:53,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:53,561 INFO L85 PathProgramCache]: Analyzing trace with hash 151676459, now seen corresponding path program 1 times [2021-11-13 01:33:53,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:33:53,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119988412] [2021-11-13 01:33:53,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:53,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:33:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:33:54,171 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:33:54,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119988412] [2021-11-13 01:33:54,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119988412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:33:54,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:33:54,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 01:33:54,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704201418] [2021-11-13 01:33:54,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:54,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:33:54,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:33:54,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:33:54,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:33:54,232 INFO L87 Difference]: Start difference. First operand has 122 states, 120 states have (on average 1.7583333333333333) internal successors, (211), 121 states have internal predecessors, (211), 0 states have call successors, (0), 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 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 01:33:54,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:54,423 INFO L93 Difference]: Finished difference Result 236 states and 377 transitions. [2021-11-13 01:33:54,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:33:54,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-13 01:33:54,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:54,448 INFO L225 Difference]: With dead ends: 236 [2021-11-13 01:33:54,448 INFO L226 Difference]: Without dead ends: 173 [2021-11-13 01:33:54,452 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 01:33:54,458 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 139 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.04ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.53ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:54,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 341 Invalid, 35 Unknown, 0 Unchecked, 13.04ms Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 81.53ms Time] [2021-11-13 01:33:54,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-13 01:33:54,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2021-11-13 01:33:54,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.311764705882353) internal successors, (223), 170 states have internal predecessors, (223), 0 states have call successors, (0), 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 01:33:54,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 223 transitions. [2021-11-13 01:33:54,563 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 223 transitions. Word has length 84 [2021-11-13 01:33:54,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:54,565 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 223 transitions. [2021-11-13 01:33:54,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 01:33:54,567 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 223 transitions. [2021-11-13 01:33:54,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-13 01:33:54,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:54,574 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:33:54,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 01:33:54,576 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:54,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:54,579 INFO L85 PathProgramCache]: Analyzing trace with hash 198012914, now seen corresponding path program 1 times [2021-11-13 01:33:54,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:33:54,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338002800] [2021-11-13 01:33:54,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:54,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:33:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:54,775 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 01:33:54,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:33:54,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338002800] [2021-11-13 01:33:54,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338002800] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:33:54,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:33:54,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 01:33:54,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861249204] [2021-11-13 01:33:54,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:54,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:33:54,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:33:54,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:33:54,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:33:54,780 INFO L87 Difference]: Start difference. First operand 171 states and 223 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 01:33:54,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:54,857 INFO L93 Difference]: Finished difference Result 379 states and 531 transitions. [2021-11-13 01:33:54,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:33:54,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2021-11-13 01:33:54,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:54,861 INFO L225 Difference]: With dead ends: 379 [2021-11-13 01:33:54,862 INFO L226 Difference]: Without dead ends: 271 [2021-11-13 01:33:54,863 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 01:33:54,865 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 76 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.05ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.08ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:54,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 271 Invalid, 31 Unknown, 0 Unchecked, 2.05ms Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 52.08ms Time] [2021-11-13 01:33:54,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-13 01:33:54,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 269. [2021-11-13 01:33:54,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.373134328358209) internal successors, (368), 268 states have internal predecessors, (368), 0 states have call successors, (0), 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 01:33:54,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 368 transitions. [2021-11-13 01:33:54,894 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 368 transitions. Word has length 87 [2021-11-13 01:33:54,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:54,894 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 368 transitions. [2021-11-13 01:33:54,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 01:33:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 368 transitions. [2021-11-13 01:33:54,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-13 01:33:54,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:54,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:33:54,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 01:33:54,898 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:54,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:54,899 INFO L85 PathProgramCache]: Analyzing trace with hash -2061550428, now seen corresponding path program 1 times [2021-11-13 01:33:54,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:33:54,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232222789] [2021-11-13 01:33:54,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:54,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:33:54,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:55,003 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 01:33:55,003 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:33:55,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232222789] [2021-11-13 01:33:55,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232222789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:33:55,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:33:55,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 01:33:55,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901569019] [2021-11-13 01:33:55,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:55,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:33:55,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:33:55,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:33:55,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:33:55,006 INFO L87 Difference]: Start difference. First operand 269 states and 368 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 01:33:55,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:55,115 INFO L93 Difference]: Finished difference Result 665 states and 954 transitions. [2021-11-13 01:33:55,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:33:55,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-11-13 01:33:55,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:55,120 INFO L225 Difference]: With dead ends: 665 [2021-11-13 01:33:55,121 INFO L226 Difference]: Without dead ends: 459 [2021-11-13 01:33:55,125 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 01:33:55,132 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 71 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.73ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.05ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:55,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 267 Invalid, 31 Unknown, 0 Unchecked, 2.73ms Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 66.05ms Time] [2021-11-13 01:33:55,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-11-13 01:33:55,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 457. [2021-11-13 01:33:55,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.412280701754386) internal successors, (644), 456 states have internal predecessors, (644), 0 states have call successors, (0), 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 01:33:55,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 644 transitions. [2021-11-13 01:33:55,197 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 644 transitions. Word has length 90 [2021-11-13 01:33:55,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:55,200 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 644 transitions. [2021-11-13 01:33:55,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 01:33:55,200 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 644 transitions. [2021-11-13 01:33:55,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-13 01:33:55,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:55,202 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:33:55,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 01:33:55,203 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:55,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:55,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1011945191, now seen corresponding path program 1 times [2021-11-13 01:33:55,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:33:55,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365514550] [2021-11-13 01:33:55,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:55,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:33:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:55,294 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 01:33:55,295 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:33:55,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365514550] [2021-11-13 01:33:55,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365514550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:33:55,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:33:55,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 01:33:55,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856937176] [2021-11-13 01:33:55,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:55,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:33:55,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:33:55,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:33:55,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:33:55,298 INFO L87 Difference]: Start difference. First operand 457 states and 644 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 01:33:55,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:55,434 INFO L93 Difference]: Finished difference Result 1213 states and 1758 transitions. [2021-11-13 01:33:55,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:33:55,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-11-13 01:33:55,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:55,444 INFO L225 Difference]: With dead ends: 1213 [2021-11-13 01:33:55,445 INFO L226 Difference]: Without dead ends: 819 [2021-11-13 01:33:55,447 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 01:33:55,458 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 66 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.16ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.86ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:55,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 263 Invalid, 31 Unknown, 0 Unchecked, 2.16ms Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 62.86ms Time] [2021-11-13 01:33:55,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-11-13 01:33:55,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 817. [2021-11-13 01:33:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 1.4313725490196079) internal successors, (1168), 816 states have internal predecessors, (1168), 0 states have call successors, (0), 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 01:33:55,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1168 transitions. [2021-11-13 01:33:55,534 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1168 transitions. Word has length 93 [2021-11-13 01:33:55,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:55,536 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 1168 transitions. [2021-11-13 01:33:55,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 01:33:55,536 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1168 transitions. [2021-11-13 01:33:55,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-13 01:33:55,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:55,548 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:33:55,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 01:33:55,549 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:55,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:55,549 INFO L85 PathProgramCache]: Analyzing trace with hash 960530668, now seen corresponding path program 1 times [2021-11-13 01:33:55,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:33:55,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667704012] [2021-11-13 01:33:55,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:55,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:33:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:55,692 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 01:33:55,692 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:33:55,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667704012] [2021-11-13 01:33:55,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667704012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:33:55,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:33:55,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 01:33:55,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895012477] [2021-11-13 01:33:55,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:55,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:33:55,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:33:55,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:33:55,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:33:55,697 INFO L87 Difference]: Start difference. First operand 817 states and 1168 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 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 01:33:55,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:55,876 INFO L93 Difference]: Finished difference Result 2261 states and 3282 transitions. [2021-11-13 01:33:55,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:33:55,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-11-13 01:33:55,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:55,887 INFO L225 Difference]: With dead ends: 2261 [2021-11-13 01:33:55,888 INFO L226 Difference]: Without dead ends: 1507 [2021-11-13 01:33:55,889 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 01:33:55,890 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 61 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.56ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.31ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:55,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 259 Invalid, 31 Unknown, 0 Unchecked, 1.56ms Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 62.31ms Time] [2021-11-13 01:33:55,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2021-11-13 01:33:56,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1505. [2021-11-13 01:33:56,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 1.4361702127659575) internal successors, (2160), 1504 states have internal predecessors, (2160), 0 states have call successors, (0), 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 01:33:56,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2160 transitions. [2021-11-13 01:33:56,042 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2160 transitions. Word has length 96 [2021-11-13 01:33:56,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:56,046 INFO L470 AbstractCegarLoop]: Abstraction has 1505 states and 2160 transitions. [2021-11-13 01:33:56,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 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 01:33:56,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2160 transitions. [2021-11-13 01:33:56,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-13 01:33:56,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:56,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:33:56,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 01:33:56,050 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:56,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:56,056 INFO L85 PathProgramCache]: Analyzing trace with hash 467482554, now seen corresponding path program 1 times [2021-11-13 01:33:56,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:33:56,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296363299] [2021-11-13 01:33:56,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:56,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:33:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:56,135 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 01:33:56,135 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:33:56,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296363299] [2021-11-13 01:33:56,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296363299] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:33:56,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:33:56,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 01:33:56,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176724068] [2021-11-13 01:33:56,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:56,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:33:56,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:33:56,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:33:56,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:33:56,138 INFO L87 Difference]: Start difference. First operand 1505 states and 2160 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 01:33:56,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:56,497 INFO L93 Difference]: Finished difference Result 4261 states and 6162 transitions. [2021-11-13 01:33:56,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:33:56,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-13 01:33:56,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:56,517 INFO L225 Difference]: With dead ends: 4261 [2021-11-13 01:33:56,517 INFO L226 Difference]: Without dead ends: 2819 [2021-11-13 01:33:56,520 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 01:33:56,522 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 56 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.53ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.88ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:56,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 255 Invalid, 31 Unknown, 0 Unchecked, 1.53ms Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 60.88ms Time] [2021-11-13 01:33:56,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2021-11-13 01:33:56,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2817. [2021-11-13 01:33:56,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2816 states have (on average 1.4318181818181819) internal successors, (4032), 2816 states have internal predecessors, (4032), 0 states have call successors, (0), 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 01:33:56,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 4032 transitions. [2021-11-13 01:33:56,804 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 4032 transitions. Word has length 99 [2021-11-13 01:33:56,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:56,805 INFO L470 AbstractCegarLoop]: Abstraction has 2817 states and 4032 transitions. [2021-11-13 01:33:56,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 01:33:56,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 4032 transitions. [2021-11-13 01:33:56,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-13 01:33:56,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:56,807 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:33:56,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 01:33:56,807 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:56,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:56,810 INFO L85 PathProgramCache]: Analyzing trace with hash 680669897, now seen corresponding path program 1 times [2021-11-13 01:33:56,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:33:56,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780260701] [2021-11-13 01:33:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:56,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:33:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:56,916 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 01:33:56,917 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:33:56,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780260701] [2021-11-13 01:33:56,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780260701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:33:56,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:33:56,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 01:33:56,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765325438] [2021-11-13 01:33:56,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:56,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:33:56,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:33:56,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:33:56,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:33:56,921 INFO L87 Difference]: Start difference. First operand 2817 states and 4032 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 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 01:33:57,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:57,432 INFO L93 Difference]: Finished difference Result 8069 states and 11586 transitions. [2021-11-13 01:33:57,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:33:57,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2021-11-13 01:33:57,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:57,467 INFO L225 Difference]: With dead ends: 8069 [2021-11-13 01:33:57,467 INFO L226 Difference]: Without dead ends: 5315 [2021-11-13 01:33:57,475 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 01:33:57,477 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 51 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.04ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.15ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:57,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 251 Invalid, 31 Unknown, 0 Unchecked, 1.04ms Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 51.15ms Time] [2021-11-13 01:33:57,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5315 states. [2021-11-13 01:33:57,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5315 to 5313. [2021-11-13 01:33:57,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5313 states, 5312 states have (on average 1.4216867469879517) internal successors, (7552), 5312 states have internal predecessors, (7552), 0 states have call successors, (0), 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 01:33:57,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 7552 transitions. [2021-11-13 01:33:57,970 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 7552 transitions. Word has length 102 [2021-11-13 01:33:57,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:57,971 INFO L470 AbstractCegarLoop]: Abstraction has 5313 states and 7552 transitions. [2021-11-13 01:33:57,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 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 01:33:57,971 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 7552 transitions. [2021-11-13 01:33:57,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-13 01:33:57,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:57,973 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:33:57,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 01:33:57,973 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:57,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:57,974 INFO L85 PathProgramCache]: Analyzing trace with hash -649240331, now seen corresponding path program 1 times [2021-11-13 01:33:57,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:33:57,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165303751] [2021-11-13 01:33:57,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:57,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:33:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:33:58,045 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 01:33:58,045 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:33:58,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165303751] [2021-11-13 01:33:58,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165303751] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:33:58,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:33:58,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 01:33:58,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225104738] [2021-11-13 01:33:58,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:33:58,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:33:58,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:33:58,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:33:58,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:33:58,048 INFO L87 Difference]: Start difference. First operand 5313 states and 7552 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 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 01:33:58,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:33:58,938 INFO L93 Difference]: Finished difference Result 15301 states and 21762 transitions. [2021-11-13 01:33:58,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:33:58,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 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 105 [2021-11-13 01:33:58,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:33:59,005 INFO L225 Difference]: With dead ends: 15301 [2021-11-13 01:33:59,006 INFO L226 Difference]: Without dead ends: 10051 [2021-11-13 01:33:59,018 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 01:33:59,019 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 46 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.03ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 89.03ms IncrementalHoareTripleChecker+Time [2021-11-13 01:33:59,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 247 Invalid, 31 Unknown, 0 Unchecked, 1.03ms Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 89.03ms Time] [2021-11-13 01:33:59,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10051 states. [2021-11-13 01:33:59,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10051 to 10049. [2021-11-13 01:33:59,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10049 states, 10048 states have (on average 1.4076433121019107) internal successors, (14144), 10048 states have internal predecessors, (14144), 0 states have call successors, (0), 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 01:33:59,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10049 states to 10049 states and 14144 transitions. [2021-11-13 01:33:59,936 INFO L78 Accepts]: Start accepts. Automaton has 10049 states and 14144 transitions. Word has length 105 [2021-11-13 01:33:59,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:33:59,937 INFO L470 AbstractCegarLoop]: Abstraction has 10049 states and 14144 transitions. [2021-11-13 01:33:59,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 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 01:33:59,937 INFO L276 IsEmpty]: Start isEmpty. Operand 10049 states and 14144 transitions. [2021-11-13 01:33:59,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-13 01:33:59,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:33:59,939 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:33:59,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 01:33:59,939 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:33:59,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:33:59,940 INFO L85 PathProgramCache]: Analyzing trace with hash 904443890, now seen corresponding path program 1 times [2021-11-13 01:33:59,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:33:59,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20858586] [2021-11-13 01:33:59,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:33:59,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:33:59,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:00,085 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 01:34:00,085 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:34:00,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20858586] [2021-11-13 01:34:00,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20858586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:00,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:00,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-13 01:34:00,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270688385] [2021-11-13 01:34:00,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:00,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 01:34:00,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:34:00,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 01:34:00,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:34:00,088 INFO L87 Difference]: Start difference. First operand 10049 states and 14144 transitions. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 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 01:34:02,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:02,663 INFO L93 Difference]: Finished difference Result 39539 states and 56053 transitions. [2021-11-13 01:34:02,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 01:34:02,664 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 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 108 [2021-11-13 01:34:02,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:02,779 INFO L225 Difference]: With dead ends: 39539 [2021-11-13 01:34:02,779 INFO L226 Difference]: Without dead ends: 29553 [2021-11-13 01:34:02,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-11-13 01:34:02,801 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 1460 mSDsluCounter, 4728 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 412.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1460 SdHoareTripleChecker+Valid, 4778 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.82ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 507.14ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:02,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1460 Valid, 4778 Invalid, 670 Unknown, 0 Unchecked, 26.82ms Time], IncrementalHoareTripleChecker [14 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 507.14ms Time] [2021-11-13 01:34:02,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29553 states. [2021-11-13 01:34:04,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29553 to 12861. [2021-11-13 01:34:04,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12861 states, 12860 states have (on average 1.3980559875583203) internal successors, (17979), 12860 states have internal predecessors, (17979), 0 states have call successors, (0), 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 01:34:04,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12861 states to 12861 states and 17979 transitions. [2021-11-13 01:34:04,251 INFO L78 Accepts]: Start accepts. Automaton has 12861 states and 17979 transitions. Word has length 108 [2021-11-13 01:34:04,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:04,251 INFO L470 AbstractCegarLoop]: Abstraction has 12861 states and 17979 transitions. [2021-11-13 01:34:04,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 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 01:34:04,252 INFO L276 IsEmpty]: Start isEmpty. Operand 12861 states and 17979 transitions. [2021-11-13 01:34:04,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-13 01:34:04,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:04,253 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:04,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 01:34:04,263 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:04,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:04,264 INFO L85 PathProgramCache]: Analyzing trace with hash 677731055, now seen corresponding path program 1 times [2021-11-13 01:34:04,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:34:04,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060952849] [2021-11-13 01:34:04,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:04,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:34:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:04,332 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 01:34:04,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:34:04,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060952849] [2021-11-13 01:34:04,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060952849] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:04,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:04,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 01:34:04,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077372394] [2021-11-13 01:34:04,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:04,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:34:04,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:34:04,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:34:04,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:34:04,335 INFO L87 Difference]: Start difference. First operand 12861 states and 17979 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 01:34:05,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:05,492 INFO L93 Difference]: Finished difference Result 32955 states and 46325 transitions. [2021-11-13 01:34:05,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:34:05,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-11-13 01:34:05,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:05,539 INFO L225 Difference]: With dead ends: 32955 [2021-11-13 01:34:05,540 INFO L226 Difference]: Without dead ends: 20157 [2021-11-13 01:34:05,558 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 01:34:05,559 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 40 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.75ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.40ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:05,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 210 Invalid, 30 Unknown, 0 Unchecked, 0.75ms Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 43.40ms Time] [2021-11-13 01:34:05,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20157 states. [2021-11-13 01:34:07,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20157 to 20155. [2021-11-13 01:34:07,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.4031457775131488) internal successors, (28279), 20154 states have internal predecessors, (28279), 0 states have call successors, (0), 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 01:34:07,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 28279 transitions. [2021-11-13 01:34:07,409 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 28279 transitions. Word has length 110 [2021-11-13 01:34:07,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:07,409 INFO L470 AbstractCegarLoop]: Abstraction has 20155 states and 28279 transitions. [2021-11-13 01:34:07,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 01:34:07,410 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 28279 transitions. [2021-11-13 01:34:07,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-13 01:34:07,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:07,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:07,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 01:34:07,412 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:07,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:07,413 INFO L85 PathProgramCache]: Analyzing trace with hash 686370445, now seen corresponding path program 1 times [2021-11-13 01:34:07,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:34:07,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339287024] [2021-11-13 01:34:07,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:07,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:34:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:07,776 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 01:34:07,777 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:34:07,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339287024] [2021-11-13 01:34:07,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339287024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:07,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:07,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-13 01:34:07,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635037195] [2021-11-13 01:34:07,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:07,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 01:34:07,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:34:07,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 01:34:07,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:34:07,778 INFO L87 Difference]: Start difference. First operand 20155 states and 28279 transitions. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 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 01:34:09,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:09,903 INFO L93 Difference]: Finished difference Result 40247 states and 56494 transitions. [2021-11-13 01:34:09,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 01:34:09,904 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-11-13 01:34:09,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:09,944 INFO L225 Difference]: With dead ends: 40247 [2021-11-13 01:34:09,945 INFO L226 Difference]: Without dead ends: 20157 [2021-11-13 01:34:09,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:34:09,968 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 795 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 137.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.15ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 159.56ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:09,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 709 Invalid, 195 Unknown, 0 Unchecked, 3.15ms Time], IncrementalHoareTripleChecker [6 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 159.56ms Time] [2021-11-13 01:34:09,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20157 states. [2021-11-13 01:34:11,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20157 to 20155. [2021-11-13 01:34:11,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.4030465416294533) internal successors, (28277), 20154 states have internal predecessors, (28277), 0 states have call successors, (0), 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 01:34:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 28277 transitions. [2021-11-13 01:34:11,619 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 28277 transitions. Word has length 110 [2021-11-13 01:34:11,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:11,620 INFO L470 AbstractCegarLoop]: Abstraction has 20155 states and 28277 transitions. [2021-11-13 01:34:11,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 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 01:34:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 28277 transitions. [2021-11-13 01:34:11,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 01:34:11,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:11,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:11,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 01:34:11,622 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:11,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:11,622 INFO L85 PathProgramCache]: Analyzing trace with hash -186898643, now seen corresponding path program 1 times [2021-11-13 01:34:11,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:34:11,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864133197] [2021-11-13 01:34:11,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:11,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:34:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:11,699 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 01:34:11,699 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:34:11,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864133197] [2021-11-13 01:34:11,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864133197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:11,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:11,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 01:34:11,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339386154] [2021-11-13 01:34:11,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:11,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:34:11,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:34:11,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:34:11,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:34:11,702 INFO L87 Difference]: Start difference. First operand 20155 states and 28277 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 01:34:13,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:13,337 INFO L93 Difference]: Finished difference Result 40245 states and 56489 transitions. [2021-11-13 01:34:13,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:34:13,337 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2021-11-13 01:34:13,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:13,382 INFO L225 Difference]: With dead ends: 40245 [2021-11-13 01:34:13,383 INFO L226 Difference]: Without dead ends: 20155 [2021-11-13 01:34:13,408 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 01:34:13,409 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 338 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.18ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.86ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:13,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 107 Invalid, 64 Unknown, 0 Unchecked, 1.18ms Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 67.86ms Time] [2021-11-13 01:34:13,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20155 states. [2021-11-13 01:34:15,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20155 to 20155. [2021-11-13 01:34:15,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.3903443485164235) internal successors, (28021), 20154 states have internal predecessors, (28021), 0 states have call successors, (0), 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 01:34:15,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 28021 transitions. [2021-11-13 01:34:15,282 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 28021 transitions. Word has length 111 [2021-11-13 01:34:15,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:15,283 INFO L470 AbstractCegarLoop]: Abstraction has 20155 states and 28021 transitions. [2021-11-13 01:34:15,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 01:34:15,283 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 28021 transitions. [2021-11-13 01:34:15,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 01:34:15,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:15,284 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:15,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 01:34:15,285 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:15,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:15,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1928315758, now seen corresponding path program 1 times [2021-11-13 01:34:15,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:34:15,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737147561] [2021-11-13 01:34:15,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:15,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:34:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:15,361 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 01:34:15,362 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:34:15,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737147561] [2021-11-13 01:34:15,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737147561] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:15,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:15,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 01:34:15,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774053635] [2021-11-13 01:34:15,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:15,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:34:15,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:34:15,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:34:15,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:34:15,364 INFO L87 Difference]: Start difference. First operand 20155 states and 28021 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 01:34:17,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:17,088 INFO L93 Difference]: Finished difference Result 40247 states and 55978 transitions. [2021-11-13 01:34:17,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:34:17,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2021-11-13 01:34:17,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:17,128 INFO L225 Difference]: With dead ends: 40247 [2021-11-13 01:34:17,128 INFO L226 Difference]: Without dead ends: 20157 [2021-11-13 01:34:17,150 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 01:34:17,151 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 506 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.24ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 131.70ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:17,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 127 Invalid, 119 Unknown, 0 Unchecked, 2.24ms Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 131.70ms Time] [2021-11-13 01:34:17,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20157 states. [2021-11-13 01:34:18,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20157 to 20155. [2021-11-13 01:34:18,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.377642155403394) internal successors, (27765), 20154 states have internal predecessors, (27765), 0 states have call successors, (0), 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 01:34:18,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 27765 transitions. [2021-11-13 01:34:18,885 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 27765 transitions. Word has length 111 [2021-11-13 01:34:18,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:18,885 INFO L470 AbstractCegarLoop]: Abstraction has 20155 states and 27765 transitions. [2021-11-13 01:34:18,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 01:34:18,886 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 27765 transitions. [2021-11-13 01:34:18,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 01:34:18,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:18,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:18,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 01:34:18,888 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:18,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:18,889 INFO L85 PathProgramCache]: Analyzing trace with hash -181889097, now seen corresponding path program 1 times [2021-11-13 01:34:18,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:34:18,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926743074] [2021-11-13 01:34:18,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:18,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:34:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:18,979 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 01:34:18,980 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:34:18,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926743074] [2021-11-13 01:34:18,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926743074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:18,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:18,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 01:34:18,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091827574] [2021-11-13 01:34:18,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:18,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:34:18,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:34:18,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:34:18,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:34:18,982 INFO L87 Difference]: Start difference. First operand 20155 states and 27765 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 01:34:21,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:21,287 INFO L93 Difference]: Finished difference Result 40245 states and 55465 transitions. [2021-11-13 01:34:21,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:34:21,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2021-11-13 01:34:21,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:21,329 INFO L225 Difference]: With dead ends: 40245 [2021-11-13 01:34:21,329 INFO L226 Difference]: Without dead ends: 20155 [2021-11-13 01:34:21,354 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 01:34:21,355 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 296 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.31ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.34ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:21,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 131 Invalid, 63 Unknown, 0 Unchecked, 1.31ms Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 81.34ms Time] [2021-11-13 01:34:21,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20155 states. [2021-11-13 01:34:23,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20155 to 20155. [2021-11-13 01:34:23,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.3677185670338394) internal successors, (27565), 20154 states have internal predecessors, (27565), 0 states have call successors, (0), 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 01:34:23,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 27565 transitions. [2021-11-13 01:34:23,402 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 27565 transitions. Word has length 111 [2021-11-13 01:34:23,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:23,402 INFO L470 AbstractCegarLoop]: Abstraction has 20155 states and 27565 transitions. [2021-11-13 01:34:23,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 01:34:23,402 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 27565 transitions. [2021-11-13 01:34:23,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 01:34:23,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:23,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:23,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 01:34:23,404 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:23,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:23,405 INFO L85 PathProgramCache]: Analyzing trace with hash -53803790, now seen corresponding path program 1 times [2021-11-13 01:34:23,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:34:23,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036608711] [2021-11-13 01:34:23,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:23,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:34:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:23,488 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 01:34:23,488 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:34:23,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036608711] [2021-11-13 01:34:23,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036608711] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:23,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:23,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 01:34:23,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093478684] [2021-11-13 01:34:23,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:23,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:34:23,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:34:23,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:34:23,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:34:23,491 INFO L87 Difference]: Start difference. First operand 20155 states and 27565 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 01:34:25,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:25,940 INFO L93 Difference]: Finished difference Result 40245 states and 55065 transitions. [2021-11-13 01:34:25,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:34:25,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2021-11-13 01:34:25,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:25,974 INFO L225 Difference]: With dead ends: 40245 [2021-11-13 01:34:25,974 INFO L226 Difference]: Without dead ends: 20155 [2021-11-13 01:34:25,993 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 01:34:25,994 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 306 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.59ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.15ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:25,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 123 Invalid, 62 Unknown, 0 Unchecked, 1.59ms Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 88.15ms Time] [2021-11-13 01:34:26,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20155 states. [2021-11-13 01:34:28,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20155 to 20155. [2021-11-13 01:34:28,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.3573980351295027) internal successors, (27357), 20154 states have internal predecessors, (27357), 0 states have call successors, (0), 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 01:34:28,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 27357 transitions. [2021-11-13 01:34:28,448 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 27357 transitions. Word has length 111 [2021-11-13 01:34:28,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:28,449 INFO L470 AbstractCegarLoop]: Abstraction has 20155 states and 27357 transitions. [2021-11-13 01:34:28,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 01:34:28,449 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 27357 transitions. [2021-11-13 01:34:28,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 01:34:28,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:28,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:28,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 01:34:28,450 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:28,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:28,451 INFO L85 PathProgramCache]: Analyzing trace with hash -816667497, now seen corresponding path program 1 times [2021-11-13 01:34:28,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:34:28,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477486328] [2021-11-13 01:34:28,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:28,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:34:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:28,518 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 01:34:28,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:34:28,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477486328] [2021-11-13 01:34:28,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477486328] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:28,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:28,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 01:34:28,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291483912] [2021-11-13 01:34:28,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:28,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:34:28,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:34:28,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:34:28,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:34:28,520 INFO L87 Difference]: Start difference. First operand 20155 states and 27357 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 01:34:30,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:30,637 INFO L93 Difference]: Finished difference Result 40245 states and 54649 transitions. [2021-11-13 01:34:30,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:34:30,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2021-11-13 01:34:30,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:30,662 INFO L225 Difference]: With dead ends: 40245 [2021-11-13 01:34:30,662 INFO L226 Difference]: Without dead ends: 20155 [2021-11-13 01:34:30,678 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 01:34:30,679 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 277 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.08ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.18ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:30,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 139 Invalid, 61 Unknown, 0 Unchecked, 1.08ms Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 64.18ms Time] [2021-11-13 01:34:30,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20155 states. [2021-11-13 01:34:32,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20155 to 20155. [2021-11-13 01:34:32,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.3476729185273395) internal successors, (27161), 20154 states have internal predecessors, (27161), 0 states have call successors, (0), 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 01:34:32,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 27161 transitions. [2021-11-13 01:34:32,998 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 27161 transitions. Word has length 111 [2021-11-13 01:34:32,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:32,999 INFO L470 AbstractCegarLoop]: Abstraction has 20155 states and 27161 transitions. [2021-11-13 01:34:32,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 01:34:32,999 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 27161 transitions. [2021-11-13 01:34:32,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 01:34:33,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:33,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:33,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 01:34:33,000 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:33,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:33,001 INFO L85 PathProgramCache]: Analyzing trace with hash 48864892, now seen corresponding path program 1 times [2021-11-13 01:34:33,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:34:33,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925009269] [2021-11-13 01:34:33,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:33,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:34:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:33,079 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 01:34:33,079 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:34:33,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925009269] [2021-11-13 01:34:33,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925009269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:33,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:33,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 01:34:33,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850930480] [2021-11-13 01:34:33,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:33,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:34:33,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:34:33,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:34:33,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:34:33,082 INFO L87 Difference]: Start difference. First operand 20155 states and 27161 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 01:34:35,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:34:35,505 INFO L93 Difference]: Finished difference Result 40245 states and 54257 transitions. [2021-11-13 01:34:35,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:34:35,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2021-11-13 01:34:35,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:34:35,529 INFO L225 Difference]: With dead ends: 40245 [2021-11-13 01:34:35,530 INFO L226 Difference]: Without dead ends: 20155 [2021-11-13 01:34:35,543 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 01:34:35,543 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 261 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.03ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.72ms IncrementalHoareTripleChecker+Time [2021-11-13 01:34:35,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 147 Invalid, 60 Unknown, 0 Unchecked, 1.03ms Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 58.72ms Time] [2021-11-13 01:34:35,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20155 states. [2021-11-13 01:34:37,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20155 to 20155. [2021-11-13 01:34:37,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.3380470378088718) internal successors, (26967), 20154 states have internal predecessors, (26967), 0 states have call successors, (0), 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 01:34:38,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 26967 transitions. [2021-11-13 01:34:38,021 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 26967 transitions. Word has length 111 [2021-11-13 01:34:38,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:34:38,021 INFO L470 AbstractCegarLoop]: Abstraction has 20155 states and 26967 transitions. [2021-11-13 01:34:38,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 01:34:38,022 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 26967 transitions. [2021-11-13 01:34:38,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 01:34:38,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:38,023 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:38,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 01:34:38,024 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:38,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:38,024 INFO L85 PathProgramCache]: Analyzing trace with hash -480425609, now seen corresponding path program 1 times [2021-11-13 01:34:38,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:34:38,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968547329] [2021-11-13 01:34:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:38,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:34:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:38,165 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 01:34:38,165 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:34:38,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968547329] [2021-11-13 01:34:38,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968547329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:38,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:38,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 01:34:38,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427511054] [2021-11-13 01:34:38,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:38,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:34:38,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:34:38,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:34:38,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:34:38,167 INFO L87 Difference]: Start difference. First operand 20155 states and 26967 transitions. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)