./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-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_0dfcd8c9-9449-4430-ba80-4ab04581e1e9/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfcd8c9-9449-4430-ba80-4ab04581e1e9/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_0dfcd8c9-9449-4430-ba80-4ab04581e1e9/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfcd8c9-9449-4430-ba80-4ab04581e1e9/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfcd8c9-9449-4430-ba80-4ab04581e1e9/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_0dfcd8c9-9449-4430-ba80-4ab04581e1e9/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 d869d36578fc433cb3bcbc293e270e4f10048025e6637a1ca792146288a88a6e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:43:35,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:43:35,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:43:35,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:43:35,821 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:43:35,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:43:35,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:43:35,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:43:35,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:43:35,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:43:35,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:43:35,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:43:35,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:43:35,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:43:35,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:43:35,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:43:35,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:43:35,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:43:35,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:43:35,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:43:35,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:43:35,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:43:35,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:43:35,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:43:35,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:43:35,887 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:43:35,888 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:43:35,889 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:43:35,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:43:35,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:43:35,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:43:35,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:43:35,892 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:43:35,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:43:35,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:43:35,895 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:43:35,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:43:35,896 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:43:35,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:43:35,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:43:35,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:43:35,899 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfcd8c9-9449-4430-ba80-4ab04581e1e9/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:43:35,946 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:43:35,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:43:35,952 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:43:35,952 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:43:35,952 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:43:35,953 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:43:35,953 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:43:35,953 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:43:35,953 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:43:35,954 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:43:35,961 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:43:35,961 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:43:35,961 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:43:35,961 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:43:35,962 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:43:35,962 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:43:35,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:43:35,963 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:43:35,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:43:35,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:43:35,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:43:35,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:43:35,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:43:35,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:43:35,964 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:43:35,965 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:43:35,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:43:35,965 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:43:35,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:43:35,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:43:35,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:43:35,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:43:35,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:43:35,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:43:35,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:43:35,969 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:43:35,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:43:35,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:43:35,970 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:43:35,970 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:43:35,970 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_0dfcd8c9-9449-4430-ba80-4ab04581e1e9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfcd8c9-9449-4430-ba80-4ab04581e1e9/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d869d36578fc433cb3bcbc293e270e4f10048025e6637a1ca792146288a88a6e [2021-11-12 23:43:36,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:43:36,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:43:36,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:43:36,261 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:43:36,261 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:43:36,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfcd8c9-9449-4430-ba80-4ab04581e1e9/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-12 23:43:36,339 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfcd8c9-9449-4430-ba80-4ab04581e1e9/bin/utaipan-vmNK8stdcF/data/3bfa338e2/6c1998858d7149e8988c7f611eeaeab4/FLAG761b1ba1d [2021-11-12 23:43:36,950 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:43:36,950 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfcd8c9-9449-4430-ba80-4ab04581e1e9/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-12 23:43:36,979 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfcd8c9-9449-4430-ba80-4ab04581e1e9/bin/utaipan-vmNK8stdcF/data/3bfa338e2/6c1998858d7149e8988c7f611eeaeab4/FLAG761b1ba1d [2021-11-12 23:43:37,155 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfcd8c9-9449-4430-ba80-4ab04581e1e9/bin/utaipan-vmNK8stdcF/data/3bfa338e2/6c1998858d7149e8988c7f611eeaeab4 [2021-11-12 23:43:37,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:43:37,161 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:43:37,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:43:37,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:43:37,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:43:37,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:43:37" (1/1) ... [2021-11-12 23:43:37,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19b28465 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:37, skipping insertion in model container [2021-11-12 23:43:37,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:43:37" (1/1) ... [2021-11-12 23:43:37,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:43:37,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:43:37,864 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_0dfcd8c9-9449-4430-ba80-4ab04581e1e9/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[24323,24336] [2021-11-12 23:43:37,916 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_0dfcd8c9-9449-4430-ba80-4ab04581e1e9/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[28161,28174] [2021-11-12 23:43:38,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:43:38,064 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:43:38,401 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_0dfcd8c9-9449-4430-ba80-4ab04581e1e9/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[24323,24336] [2021-11-12 23:43:38,453 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_0dfcd8c9-9449-4430-ba80-4ab04581e1e9/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[28161,28174] [2021-11-12 23:43:38,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:43:38,597 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:43:38,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:38 WrapperNode [2021-11-12 23:43:38,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:43:38,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:43:38,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:43:38,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:43:38,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:38" (1/1) ... [2021-11-12 23:43:38,638 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:38" (1/1) ... [2021-11-12 23:43:38,752 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:43:38,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:43:38,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:43:38,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:43:38,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:38" (1/1) ... [2021-11-12 23:43:38,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:38" (1/1) ... [2021-11-12 23:43:38,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:38" (1/1) ... [2021-11-12 23:43:38,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:38" (1/1) ... [2021-11-12 23:43:38,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:38" (1/1) ... [2021-11-12 23:43:38,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:38" (1/1) ... [2021-11-12 23:43:38,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:38" (1/1) ... [2021-11-12 23:43:38,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:43:38,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:43:38,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:43:38,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:43:38,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:38" (1/1) ... [2021-11-12 23:43:38,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:43:38,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfcd8c9-9449-4430-ba80-4ab04581e1e9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:43:38,898 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfcd8c9-9449-4430-ba80-4ab04581e1e9/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:43:38,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dfcd8c9-9449-4430-ba80-4ab04581e1e9/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:43:38,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:43:38,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:43:38,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:43:38,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:43:41,558 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:43:41,559 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:43:41,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:43:41 BoogieIcfgContainer [2021-11-12 23:43:41,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:43:41,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:43:41,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:43:41,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:43:41,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:43:37" (1/3) ... [2021-11-12 23:43:41,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ce9697d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:43:41, skipping insertion in model container [2021-11-12 23:43:41,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:38" (2/3) ... [2021-11-12 23:43:41,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ce9697d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:43:41, skipping insertion in model container [2021-11-12 23:43:41,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:43:41" (3/3) ... [2021-11-12 23:43:41,575 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-12 23:43:41,583 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:43:41,584 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 23:43:41,652 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:43:41,660 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 [2021-11-12 23:43:41,660 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 23:43:41,686 INFO L276 IsEmpty]: Start isEmpty. Operand has 490 states, 487 states have (on average 1.7166324435318274) internal successors, (836), 489 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:41,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-12 23:43:41,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:41,707 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:41,707 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:41,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:41,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1693198294, now seen corresponding path program 1 times [2021-11-12 23:43:41,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:43:41,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33952520] [2021-11-12 23:43:41,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:41,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:43:42,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:43:42,974 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:43:42,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33952520] [2021-11-12 23:43:42,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33952520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:42,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:42,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:43:42,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071796849] [2021-11-12 23:43:42,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:42,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:43:42,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:43:43,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:43:43,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:43:43,045 INFO L87 Difference]: Start difference. First operand has 490 states, 487 states have (on average 1.7166324435318274) internal successors, (836), 489 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:43,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:43,574 INFO L93 Difference]: Finished difference Result 1442 states and 2463 transitions. [2021-11-12 23:43:43,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:43:43,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 210 [2021-11-12 23:43:43,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:43,606 INFO L225 Difference]: With dead ends: 1442 [2021-11-12 23:43:43,607 INFO L226 Difference]: Without dead ends: 957 [2021-11-12 23:43:43,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:43:43,623 INFO L933 BasicCegarLoop]: 1282 mSDtfsCounter, 1823 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 234.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1823 SdHoareTripleChecker+Valid, 2032 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.02ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 295.48ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:43,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1823 Valid, 2032 Invalid, 149 Unknown, 0 Unchecked, 28.02ms Time], IncrementalHoareTripleChecker [17 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 295.48ms Time] [2021-11-12 23:43:43,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-11-12 23:43:43,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 936. [2021-11-12 23:43:43,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 934 states have (on average 1.4089935760171306) internal successors, (1316), 935 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:43,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1316 transitions. [2021-11-12 23:43:43,771 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1316 transitions. Word has length 210 [2021-11-12 23:43:43,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:43,773 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 1316 transitions. [2021-11-12 23:43:43,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:43,777 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1316 transitions. [2021-11-12 23:43:43,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-12 23:43:43,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:43,787 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:43,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:43:43,787 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:43,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:43,788 INFO L85 PathProgramCache]: Analyzing trace with hash -981193504, now seen corresponding path program 1 times [2021-11-12 23:43:43,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:43:43,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014233695] [2021-11-12 23:43:43,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:43,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:43:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:43:44,042 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:43:44,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014233695] [2021-11-12 23:43:44,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014233695] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:44,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:44,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:43:44,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722129337] [2021-11-12 23:43:44,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:44,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:43:44,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:43:44,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:43:44,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:43:44,052 INFO L87 Difference]: Start difference. First operand 936 states and 1316 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:44,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:44,400 INFO L93 Difference]: Finished difference Result 2655 states and 3710 transitions. [2021-11-12 23:43:44,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:43:44,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 212 [2021-11-12 23:43:44,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:44,416 INFO L225 Difference]: With dead ends: 2655 [2021-11-12 23:43:44,417 INFO L226 Difference]: Without dead ends: 1840 [2021-11-12 23:43:44,423 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 [2021-11-12 23:43:44,425 INFO L933 BasicCegarLoop]: 1198 mSDtfsCounter, 567 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 189.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.09ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 225.70ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:44,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 1816 Invalid, 137 Unknown, 0 Unchecked, 6.09ms Time], IncrementalHoareTripleChecker [7 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 225.70ms Time] [2021-11-12 23:43:44,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-11-12 23:43:44,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1819. [2021-11-12 23:43:44,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1817 states have (on average 1.407264722069345) internal successors, (2557), 1818 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:44,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2557 transitions. [2021-11-12 23:43:44,569 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2557 transitions. Word has length 212 [2021-11-12 23:43:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:44,573 INFO L470 AbstractCegarLoop]: Abstraction has 1819 states and 2557 transitions. [2021-11-12 23:43:44,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:44,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2557 transitions. [2021-11-12 23:43:44,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-12 23:43:44,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:44,585 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:44,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 23:43:44,586 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:44,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:44,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1113227240, now seen corresponding path program 1 times [2021-11-12 23:43:44,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:43:44,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318087339] [2021-11-12 23:43:44,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:44,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:43:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:43:44,676 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:43:44,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318087339] [2021-11-12 23:43:44,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318087339] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:44,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:44,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:43:44,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725750020] [2021-11-12 23:43:44,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:44,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:43:44,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:43:44,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:43:44,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:43:44,679 INFO L87 Difference]: Start difference. First operand 1819 states and 2557 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:45,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:45,069 INFO L93 Difference]: Finished difference Result 5305 states and 7438 transitions. [2021-11-12 23:43:45,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:43:45,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 212 [2021-11-12 23:43:45,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:45,092 INFO L225 Difference]: With dead ends: 5305 [2021-11-12 23:43:45,092 INFO L226 Difference]: Without dead ends: 3618 [2021-11-12 23:43:45,098 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 [2021-11-12 23:43:45,104 INFO L933 BasicCegarLoop]: 1280 mSDtfsCounter, 676 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 151.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 1918 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.06ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 186.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:45,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 1918 Invalid, 123 Unknown, 0 Unchecked, 6.06ms Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 186.87ms Time] [2021-11-12 23:43:45,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3618 states. [2021-11-12 23:43:45,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3618 to 1822. [2021-11-12 23:43:45,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1820 states have (on average 1.4065934065934067) internal successors, (2560), 1821 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:45,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2560 transitions. [2021-11-12 23:43:45,252 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2560 transitions. Word has length 212 [2021-11-12 23:43:45,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:45,252 INFO L470 AbstractCegarLoop]: Abstraction has 1822 states and 2560 transitions. [2021-11-12 23:43:45,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:45,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2560 transitions. [2021-11-12 23:43:45,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-12 23:43:45,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:45,258 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:45,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 23:43:45,259 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:45,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:45,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1513995603, now seen corresponding path program 1 times [2021-11-12 23:43:45,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:43:45,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831825073] [2021-11-12 23:43:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:45,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:43:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:43:45,614 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:43:45,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831825073] [2021-11-12 23:43:45,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831825073] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:45,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:45,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:43:45,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198955889] [2021-11-12 23:43:45,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:45,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:43:45,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:43:45,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:43:45,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:43:45,617 INFO L87 Difference]: Start difference. First operand 1822 states and 2560 transitions. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:46,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:46,084 INFO L93 Difference]: Finished difference Result 5264 states and 7375 transitions. [2021-11-12 23:43:46,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:43:46,086 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 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 213 [2021-11-12 23:43:46,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:46,108 INFO L225 Difference]: With dead ends: 5264 [2021-11-12 23:43:46,108 INFO L226 Difference]: Without dead ends: 3457 [2021-11-12 23:43:46,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:43:46,119 INFO L933 BasicCegarLoop]: 1030 mSDtfsCounter, 2150 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 172.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2150 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.55ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 206.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:46,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2150 Valid, 1638 Invalid, 153 Unknown, 0 Unchecked, 8.55ms Time], IncrementalHoareTripleChecker [24 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 206.66ms Time] [2021-11-12 23:43:46,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3457 states. [2021-11-12 23:43:46,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3457 to 3436. [2021-11-12 23:43:46,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3436 states, 3434 states have (on average 1.3940011648223647) internal successors, (4787), 3435 states have internal predecessors, (4787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:46,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3436 states to 3436 states and 4787 transitions. [2021-11-12 23:43:46,408 INFO L78 Accepts]: Start accepts. Automaton has 3436 states and 4787 transitions. Word has length 213 [2021-11-12 23:43:46,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:46,408 INFO L470 AbstractCegarLoop]: Abstraction has 3436 states and 4787 transitions. [2021-11-12 23:43:46,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 4 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:46,409 INFO L276 IsEmpty]: Start isEmpty. Operand 3436 states and 4787 transitions. [2021-11-12 23:43:46,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-12 23:43:46,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:46,417 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:46,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 23:43:46,418 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:46,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:46,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1170298391, now seen corresponding path program 1 times [2021-11-12 23:43:46,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:43:46,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033826571] [2021-11-12 23:43:46,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:46,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:43:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:43:46,782 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:43:46,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033826571] [2021-11-12 23:43:46,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033826571] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:46,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:46,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:43:46,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243868347] [2021-11-12 23:43:46,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:46,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:43:46,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:43:46,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:43:46,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:43:46,785 INFO L87 Difference]: Start difference. First operand 3436 states and 4787 transitions. Second operand has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:47,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:47,575 INFO L93 Difference]: Finished difference Result 10016 states and 13924 transitions. [2021-11-12 23:43:47,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:43:47,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 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 214 [2021-11-12 23:43:47,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:47,615 INFO L225 Difference]: With dead ends: 10016 [2021-11-12 23:43:47,615 INFO L226 Difference]: Without dead ends: 6718 [2021-11-12 23:43:47,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:43:47,623 INFO L933 BasicCegarLoop]: 1023 mSDtfsCounter, 1469 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 171.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 1635 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.34ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 204.45ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:47,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1469 Valid, 1635 Invalid, 137 Unknown, 0 Unchecked, 8.34ms Time], IncrementalHoareTripleChecker [13 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 204.45ms Time] [2021-11-12 23:43:47,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6718 states. [2021-11-12 23:43:48,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6718 to 6697. [2021-11-12 23:43:48,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6697 states, 6695 states have (on average 1.3856609410007468) internal successors, (9277), 6696 states have internal predecessors, (9277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:48,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6697 states to 6697 states and 9277 transitions. [2021-11-12 23:43:48,193 INFO L78 Accepts]: Start accepts. Automaton has 6697 states and 9277 transitions. Word has length 214 [2021-11-12 23:43:48,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:48,193 INFO L470 AbstractCegarLoop]: Abstraction has 6697 states and 9277 transitions. [2021-11-12 23:43:48,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:48,194 INFO L276 IsEmpty]: Start isEmpty. Operand 6697 states and 9277 transitions. [2021-11-12 23:43:48,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-12 23:43:48,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:48,208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:48,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 23:43:48,208 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:48,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:48,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1674194278, now seen corresponding path program 1 times [2021-11-12 23:43:48,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:43:48,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153079887] [2021-11-12 23:43:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:48,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:43:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:43:48,612 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:43:48,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153079887] [2021-11-12 23:43:48,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153079887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:48,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:48,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:43:48,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125003770] [2021-11-12 23:43:48,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:48,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:43:48,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:43:48,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:43:48,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:43:48,615 INFO L87 Difference]: Start difference. First operand 6697 states and 9277 transitions. Second operand has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:49,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:49,753 INFO L93 Difference]: Finished difference Result 19615 states and 27118 transitions. [2021-11-12 23:43:49,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:43:49,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 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 216 [2021-11-12 23:43:49,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:49,839 INFO L225 Difference]: With dead ends: 19615 [2021-11-12 23:43:49,839 INFO L226 Difference]: Without dead ends: 13060 [2021-11-12 23:43:49,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:43:49,853 INFO L933 BasicCegarLoop]: 1008 mSDtfsCounter, 1448 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 194.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1448 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.96ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 261.83ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:49,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1448 Valid, 1612 Invalid, 149 Unknown, 0 Unchecked, 8.96ms Time], IncrementalHoareTripleChecker [17 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 261.83ms Time] [2021-11-12 23:43:49,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13060 states. [2021-11-12 23:43:50,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13060 to 13039. [2021-11-12 23:43:50,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13039 states, 13037 states have (on average 1.3740891309350312) internal successors, (17914), 13038 states have internal predecessors, (17914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:50,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13039 states to 13039 states and 17914 transitions. [2021-11-12 23:43:50,915 INFO L78 Accepts]: Start accepts. Automaton has 13039 states and 17914 transitions. Word has length 216 [2021-11-12 23:43:50,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:50,916 INFO L470 AbstractCegarLoop]: Abstraction has 13039 states and 17914 transitions. [2021-11-12 23:43:50,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:50,917 INFO L276 IsEmpty]: Start isEmpty. Operand 13039 states and 17914 transitions. [2021-11-12 23:43:50,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-12 23:43:50,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:50,947 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:50,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 23:43:50,948 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:50,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:50,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1621503621, now seen corresponding path program 1 times [2021-11-12 23:43:50,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:43:50,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800895785] [2021-11-12 23:43:50,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:50,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:43:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:43:51,068 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:43:51,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800895785] [2021-11-12 23:43:51,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800895785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:51,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:51,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:43:51,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550692693] [2021-11-12 23:43:51,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:51,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:43:51,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:43:51,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:43:51,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:43:51,071 INFO L87 Difference]: Start difference. First operand 13039 states and 17914 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:52,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:52,721 INFO L93 Difference]: Finished difference Result 37040 states and 50583 transitions. [2021-11-12 23:43:52,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:43:52,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 218 [2021-11-12 23:43:52,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:52,785 INFO L225 Difference]: With dead ends: 37040 [2021-11-12 23:43:52,785 INFO L226 Difference]: Without dead ends: 25563 [2021-11-12 23:43:52,807 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 [2021-11-12 23:43:52,808 INFO L933 BasicCegarLoop]: 1212 mSDtfsCounter, 550 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 156.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1830 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.35ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 192.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:52,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 1830 Invalid, 132 Unknown, 0 Unchecked, 6.35ms Time], IncrementalHoareTripleChecker [7 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 192.86ms Time] [2021-11-12 23:43:52,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25563 states. [2021-11-12 23:43:54,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25563 to 25542. [2021-11-12 23:43:54,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25542 states, 25540 states have (on average 1.3669929522317932) internal successors, (34913), 25541 states have internal predecessors, (34913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:54,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25542 states to 25542 states and 34913 transitions. [2021-11-12 23:43:54,706 INFO L78 Accepts]: Start accepts. Automaton has 25542 states and 34913 transitions. Word has length 218 [2021-11-12 23:43:54,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:54,707 INFO L470 AbstractCegarLoop]: Abstraction has 25542 states and 34913 transitions. [2021-11-12 23:43:54,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:54,707 INFO L276 IsEmpty]: Start isEmpty. Operand 25542 states and 34913 transitions. [2021-11-12 23:43:54,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-12 23:43:54,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:54,758 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:54,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 23:43:54,759 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:54,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:54,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2084475563, now seen corresponding path program 1 times [2021-11-12 23:43:54,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:43:54,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415075204] [2021-11-12 23:43:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:54,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:43:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:54,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:43:54,822 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:43:54,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415075204] [2021-11-12 23:43:54,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415075204] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:54,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:54,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:43:54,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157747036] [2021-11-12 23:43:54,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:54,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:43:54,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:43:54,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:43:54,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:43:54,825 INFO L87 Difference]: Start difference. First operand 25542 states and 34913 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:57,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:57,547 INFO L93 Difference]: Finished difference Result 74691 states and 101857 transitions. [2021-11-12 23:43:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:43:57,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 218 [2021-11-12 23:43:57,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:57,689 INFO L225 Difference]: With dead ends: 74691 [2021-11-12 23:43:57,690 INFO L226 Difference]: Without dead ends: 50835 [2021-11-12 23:43:57,727 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 [2021-11-12 23:43:57,728 INFO L933 BasicCegarLoop]: 1259 mSDtfsCounter, 652 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 150.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 1897 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.54ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 191.50ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:57,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [652 Valid, 1897 Invalid, 120 Unknown, 0 Unchecked, 7.54ms Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 191.50ms Time] [2021-11-12 23:43:57,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50835 states. [2021-11-12 23:43:59,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50835 to 25575. [2021-11-12 23:43:59,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25575 states, 25573 states have (on average 1.366519375904274) internal successors, (34946), 25574 states have internal predecessors, (34946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:59,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25575 states to 25575 states and 34946 transitions. [2021-11-12 23:43:59,646 INFO L78 Accepts]: Start accepts. Automaton has 25575 states and 34946 transitions. Word has length 218 [2021-11-12 23:43:59,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:59,647 INFO L470 AbstractCegarLoop]: Abstraction has 25575 states and 34946 transitions. [2021-11-12 23:43:59,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:59,647 INFO L276 IsEmpty]: Start isEmpty. Operand 25575 states and 34946 transitions. [2021-11-12 23:43:59,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-12 23:43:59,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:59,694 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:59,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 23:43:59,695 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:59,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:59,695 INFO L85 PathProgramCache]: Analyzing trace with hash 233775084, now seen corresponding path program 1 times [2021-11-12 23:43:59,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:43:59,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091085434] [2021-11-12 23:43:59,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:59,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:43:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:43:59,945 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:43:59,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091085434] [2021-11-12 23:43:59,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091085434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:59,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:59,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:43:59,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217082410] [2021-11-12 23:43:59,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:59,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:43:59,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:43:59,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:43:59,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:43:59,948 INFO L87 Difference]: Start difference. First operand 25575 states and 34946 transitions. Second operand has 5 states, 5 states have (on average 43.8) internal successors, (219), 4 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:44:02,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:02,871 INFO L93 Difference]: Finished difference Result 74016 states and 100821 transitions. [2021-11-12 23:44:02,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:44:02,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.8) internal successors, (219), 4 states have internal predecessors, (219), 0 states have call successors, (0), 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 219 [2021-11-12 23:44:02,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:02,977 INFO L225 Difference]: With dead ends: 74016 [2021-11-12 23:44:02,977 INFO L226 Difference]: Without dead ends: 48641 [2021-11-12 23:44:03,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:44:03,017 INFO L933 BasicCegarLoop]: 1016 mSDtfsCounter, 2122 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 196.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2122 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.90ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 233.03ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:03,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2122 Valid, 1628 Invalid, 143 Unknown, 0 Unchecked, 9.90ms Time], IncrementalHoareTripleChecker [18 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 233.03ms Time] [2021-11-12 23:44:03,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48641 states. [2021-11-12 23:44:05,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48641 to 48620. [2021-11-12 23:44:05,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48620 states, 48618 states have (on average 1.3545806080052656) internal successors, (65857), 48619 states have internal predecessors, (65857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:44:05,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48620 states to 48620 states and 65857 transitions. [2021-11-12 23:44:05,827 INFO L78 Accepts]: Start accepts. Automaton has 48620 states and 65857 transitions. Word has length 219 [2021-11-12 23:44:05,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:05,828 INFO L470 AbstractCegarLoop]: Abstraction has 48620 states and 65857 transitions. [2021-11-12 23:44:05,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.8) internal successors, (219), 4 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:44:05,828 INFO L276 IsEmpty]: Start isEmpty. Operand 48620 states and 65857 transitions. [2021-11-12 23:44:05,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-12 23:44:05,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:05,931 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:44:05,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 23:44:05,932 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:44:05,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:05,933 INFO L85 PathProgramCache]: Analyzing trace with hash -636370262, now seen corresponding path program 1 times [2021-11-12 23:44:05,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:44:05,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987506407] [2021-11-12 23:44:05,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:05,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:44:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:44:06,200 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:44:06,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987506407] [2021-11-12 23:44:06,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987506407] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:44:06,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:44:06,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:44:06,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312523435] [2021-11-12 23:44:06,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:06,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:44:06,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:44:06,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:44:06,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:44:06,203 INFO L87 Difference]: Start difference. First operand 48620 states and 65857 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:44:11,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:11,577 INFO L93 Difference]: Finished difference Result 141556 states and 191173 transitions. [2021-11-12 23:44:11,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:44:11,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 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 220 [2021-11-12 23:44:11,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:11,781 INFO L225 Difference]: With dead ends: 141556 [2021-11-12 23:44:11,782 INFO L226 Difference]: Without dead ends: 95200 [2021-11-12 23:44:11,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:44:11,846 INFO L933 BasicCegarLoop]: 1015 mSDtfsCounter, 1459 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 138.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 1631 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.90ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 167.15ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:11,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1459 Valid, 1631 Invalid, 130 Unknown, 0 Unchecked, 6.90ms Time], IncrementalHoareTripleChecker [9 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 167.15ms Time] [2021-11-12 23:44:11,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95200 states. [2021-11-12 23:44:17,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95200 to 95179. [2021-11-12 23:44:17,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95179 states, 95177 states have (on average 1.347006104415983) internal successors, (128204), 95178 states have internal predecessors, (128204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:44:17,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95179 states to 95179 states and 128204 transitions. [2021-11-12 23:44:17,736 INFO L78 Accepts]: Start accepts. Automaton has 95179 states and 128204 transitions. Word has length 220 [2021-11-12 23:44:17,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:17,736 INFO L470 AbstractCegarLoop]: Abstraction has 95179 states and 128204 transitions. [2021-11-12 23:44:17,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:44:17,736 INFO L276 IsEmpty]: Start isEmpty. Operand 95179 states and 128204 transitions. [2021-11-12 23:44:17,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-12 23:44:17,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:17,870 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:44:17,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 23:44:17,870 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:44:17,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:17,871 INFO L85 PathProgramCache]: Analyzing trace with hash 831942124, now seen corresponding path program 1 times [2021-11-12 23:44:17,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:44:17,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242434706] [2021-11-12 23:44:17,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:17,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:44:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:44:18,124 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:44:18,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242434706] [2021-11-12 23:44:18,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242434706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:44:18,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:44:18,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:44:18,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667273363] [2021-11-12 23:44:18,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:18,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:44:18,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:44:18,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:44:18,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:44:18,127 INFO L87 Difference]: Start difference. First operand 95179 states and 128204 transitions. Second operand has 4 states, 4 states have (on average 55.5) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:44:24,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:24,941 INFO L93 Difference]: Finished difference Result 207185 states and 278550 transitions. [2021-11-12 23:44:24,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:44:24,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 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 222 [2021-11-12 23:44:24,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:25,117 INFO L225 Difference]: With dead ends: 207185 [2021-11-12 23:44:25,118 INFO L226 Difference]: Without dead ends: 113507 [2021-11-12 23:44:25,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:44:25,182 INFO L933 BasicCegarLoop]: 994 mSDtfsCounter, 1432 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 390.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1432 SdHoareTripleChecker+Valid, 1602 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.82ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 428.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:25,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1432 Valid, 1602 Invalid, 138 Unknown, 0 Unchecked, 5.82ms Time], IncrementalHoareTripleChecker [11 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 428.56ms Time] [2021-11-12 23:44:25,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113507 states.