./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.13.cil-2.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_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/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_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/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_f374638e-bf63-4d83-a39f-e80653898c42/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 19aa3a10df20aa66b298603653689263cc3fd1e3f00b1be832baa1f64aefda99 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:33:39,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:33:39,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:33:39,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:33:39,845 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:33:39,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:33:39,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:33:39,851 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:33:39,853 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:33:39,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:33:39,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:33:39,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:33:39,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:33:39,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:33:39,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:33:39,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:33:39,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:33:39,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:33:39,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:33:39,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:33:39,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:33:39,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:33:39,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:33:39,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:33:39,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:33:39,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:33:39,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:33:39,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:33:39,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:33:39,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:33:39,888 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:33:39,889 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:33:39,890 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:33:39,891 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:33:39,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:33:39,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:33:39,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:33:39,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:33:39,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:33:39,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:33:39,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:33:39,905 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:33:39,959 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:33:39,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:33:39,961 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:33:39,962 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:33:39,962 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:33:39,962 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:33:39,963 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:33:39,963 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:33:39,963 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:33:39,963 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:33:39,972 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:33:39,973 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:33:39,973 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:33:39,973 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:33:39,974 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:33:39,974 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:33:39,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:33:39,977 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:33:39,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:33:39,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:33:39,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:33:39,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:33:39,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:33:39,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:33:39,979 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:33:39,979 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:33:39,979 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:33:39,980 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:33:39,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:33:39,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:33:39,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:33:39,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:33:39,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:33:39,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:33:39,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:33:39,984 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:33:39,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:33:39,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:33:39,985 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:33:39,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:33:39,986 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_f374638e-bf63-4d83-a39f-e80653898c42/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19aa3a10df20aa66b298603653689263cc3fd1e3f00b1be832baa1f64aefda99 [2021-11-13 02:33:40,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:33:40,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:33:40,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:33:40,350 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:33:40,351 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:33:40,352 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.13.cil-2.c [2021-11-13 02:33:40,420 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/data/6e8d0f593/7d8fbc099119400594b66169a824021a/FLAG2fd1d2bfb [2021-11-13 02:33:41,551 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:33:41,552 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/sv-benchmarks/c/combinations/Problem05_label40+token_ring.13.cil-2.c [2021-11-13 02:33:41,608 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/data/6e8d0f593/7d8fbc099119400594b66169a824021a/FLAG2fd1d2bfb [2021-11-13 02:33:41,802 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/data/6e8d0f593/7d8fbc099119400594b66169a824021a [2021-11-13 02:33:41,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:33:41,808 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:33:41,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:33:41,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:33:41,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:33:41,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:33:41" (1/1) ... [2021-11-13 02:33:41,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c482e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:41, skipping insertion in model container [2021-11-13 02:33:41,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:33:41" (1/1) ... [2021-11-13 02:33:41,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:33:42,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:33:44,920 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_f374638e-bf63-4d83-a39f-e80653898c42/sv-benchmarks/c/combinations/Problem05_label40+token_ring.13.cil-2.c[377069,377082] [2021-11-13 02:33:44,980 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_f374638e-bf63-4d83-a39f-e80653898c42/sv-benchmarks/c/combinations/Problem05_label40+token_ring.13.cil-2.c[383339,383352] [2021-11-13 02:33:45,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:33:45,392 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:33:46,904 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_f374638e-bf63-4d83-a39f-e80653898c42/sv-benchmarks/c/combinations/Problem05_label40+token_ring.13.cil-2.c[377069,377082] [2021-11-13 02:33:46,916 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_f374638e-bf63-4d83-a39f-e80653898c42/sv-benchmarks/c/combinations/Problem05_label40+token_ring.13.cil-2.c[383339,383352] [2021-11-13 02:33:46,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:33:47,063 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:33:47,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:47 WrapperNode [2021-11-13 02:33:47,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:33:47,065 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:33:47,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:33:47,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:33:47,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:47" (1/1) ... [2021-11-13 02:33:47,179 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:47" (1/1) ... [2021-11-13 02:33:47,857 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:33:47,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:33:47,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:33:47,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:33:47,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:47" (1/1) ... [2021-11-13 02:33:47,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:47" (1/1) ... [2021-11-13 02:33:47,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:47" (1/1) ... [2021-11-13 02:33:47,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:47" (1/1) ... [2021-11-13 02:33:48,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:47" (1/1) ... [2021-11-13 02:33:48,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:47" (1/1) ... [2021-11-13 02:33:48,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:47" (1/1) ... [2021-11-13 02:33:48,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:33:48,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:33:48,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:33:48,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:33:48,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:47" (1/1) ... [2021-11-13 02:33:48,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:33:48,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:33:48,696 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:33:48,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:33:48,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:33:48,753 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-13 02:33:48,753 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-13 02:33:48,753 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-13 02:33:48,753 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-13 02:33:48,754 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-13 02:33:48,754 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-13 02:33:48,754 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-13 02:33:48,754 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-13 02:33:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-13 02:33:48,755 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-13 02:33:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-13 02:33:48,755 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-13 02:33:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 02:33:48,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:33:48,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:34:01,588 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:34:01,589 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-13 02:34:01,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:34:01 BoogieIcfgContainer [2021-11-13 02:34:01,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:34:01,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:34:01,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:34:01,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:34:01,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:33:41" (1/3) ... [2021-11-13 02:34:01,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585cec0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:34:01, skipping insertion in model container [2021-11-13 02:34:01,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:47" (2/3) ... [2021-11-13 02:34:01,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585cec0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:34:01, skipping insertion in model container [2021-11-13 02:34:01,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:34:01" (3/3) ... [2021-11-13 02:34:01,608 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label40+token_ring.13.cil-2.c [2021-11-13 02:34:01,623 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:34:01,624 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 02:34:01,701 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:34:01,711 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 02:34:01,711 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 02:34:01,794 INFO L276 IsEmpty]: Start isEmpty. Operand has 1842 states, 1806 states have (on average 1.9540420819490587) internal successors, (3529), 1809 states have internal predecessors, (3529), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-13 02:34:01,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-13 02:34:01,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:01,809 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] [2021-11-13 02:34:01,810 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:01,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:01,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1029859456, now seen corresponding path program 1 times [2021-11-13 02:34:01,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:01,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580816343] [2021-11-13 02:34:01,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:01,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:02,381 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:02,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580816343] [2021-11-13 02:34:02,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580816343] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:02,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:02,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:34:02,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650655914] [2021-11-13 02:34:02,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:02,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:34:02,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:02,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:34:02,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:34:02,474 INFO L87 Difference]: Start difference. First operand has 1842 states, 1806 states have (on average 1.9540420819490587) internal successors, (3529), 1809 states have internal predecessors, (3529), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 02:34:03,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:03,948 INFO L93 Difference]: Finished difference Result 3866 states and 7483 transitions. [2021-11-13 02:34:03,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:34:03,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2021-11-13 02:34:03,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:03,984 INFO L225 Difference]: With dead ends: 3866 [2021-11-13 02:34:03,984 INFO L226 Difference]: Without dead ends: 2023 [2021-11-13 02:34:04,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:34:04,007 INFO L933 BasicCegarLoop]: 3541 mSDtfsCounter, 3812 mSDsluCounter, 3753 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 841.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3812 SdHoareTripleChecker+Valid, 6980 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 49.49ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1162.23ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:04,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3812 Valid, 6980 Invalid, 756 Unknown, 0 Unchecked, 49.49ms Time], IncrementalHoareTripleChecker [14 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 1162.23ms Time] [2021-11-13 02:34:04,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-11-13 02:34:04,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 2022. [2021-11-13 02:34:04,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 1958 states have (on average 1.916241062308478) internal successors, (3752), 1961 states have internal predecessors, (3752), 50 states have call successors, (50), 12 states have call predecessors, (50), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-13 02:34:04,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 3852 transitions. [2021-11-13 02:34:04,200 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 3852 transitions. Word has length 70 [2021-11-13 02:34:04,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:04,201 INFO L470 AbstractCegarLoop]: Abstraction has 2022 states and 3852 transitions. [2021-11-13 02:34:04,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 02:34:04,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 3852 transitions. [2021-11-13 02:34:04,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 02:34:04,216 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:04,216 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:04,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 02:34:04,217 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:04,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:04,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2127836520, now seen corresponding path program 1 times [2021-11-13 02:34:04,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:04,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791088672] [2021-11-13 02:34:04,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:04,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:34:04,457 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:04,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791088672] [2021-11-13 02:34:04,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791088672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:04,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416430343] [2021-11-13 02:34:04,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:04,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:04,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:04,467 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:04,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 02:34:04,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:04,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:34:04,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 02:34:05,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 02:34:05,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416430343] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:05,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:34:05,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-13 02:34:05,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722153941] [2021-11-13 02:34:05,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:05,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:34:05,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:05,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:34:05,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:05,563 INFO L87 Difference]: Start difference. First operand 2022 states and 3852 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 02:34:06,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:06,170 INFO L93 Difference]: Finished difference Result 2767 states and 5025 transitions. [2021-11-13 02:34:06,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:34:06,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2021-11-13 02:34:06,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:06,194 INFO L225 Difference]: With dead ends: 2767 [2021-11-13 02:34:06,195 INFO L226 Difference]: Without dead ends: 2391 [2021-11-13 02:34:06,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:06,200 INFO L933 BasicCegarLoop]: 3360 mSDtfsCounter, 3525 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 389.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3525 SdHoareTripleChecker+Valid, 3600 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.10ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 476.38ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:06,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3525 Valid, 3600 Invalid, 324 Unknown, 0 Unchecked, 15.10ms Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 476.38ms Time] [2021-11-13 02:34:06,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-11-13 02:34:06,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 2387. [2021-11-13 02:34:06,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2267 states have (on average 1.8619320688134098) internal successors, (4221), 2271 states have internal predecessors, (4221), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-13 02:34:06,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 4409 transitions. [2021-11-13 02:34:06,311 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 4409 transitions. Word has length 143 [2021-11-13 02:34:06,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:06,316 INFO L470 AbstractCegarLoop]: Abstraction has 2387 states and 4409 transitions. [2021-11-13 02:34:06,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 02:34:06,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 4409 transitions. [2021-11-13 02:34:06,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 02:34:06,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:06,331 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:06,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:06,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:06,546 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:06,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:06,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1581112986, now seen corresponding path program 1 times [2021-11-13 02:34:06,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:06,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624896366] [2021-11-13 02:34:06,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:06,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:34:06,757 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:06,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624896366] [2021-11-13 02:34:06,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624896366] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:06,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143402225] [2021-11-13 02:34:06,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:06,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:06,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:06,766 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:06,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 02:34:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:07,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:34:07,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 02:34:07,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 02:34:07,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143402225] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:07,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:34:07,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-13 02:34:07,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452702474] [2021-11-13 02:34:07,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:07,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:34:07,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:07,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:34:07,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:07,887 INFO L87 Difference]: Start difference. First operand 2387 states and 4409 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 02:34:08,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:08,568 INFO L93 Difference]: Finished difference Result 3856 states and 6716 transitions. [2021-11-13 02:34:08,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:34:08,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2021-11-13 02:34:08,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:08,594 INFO L225 Difference]: With dead ends: 3856 [2021-11-13 02:34:08,595 INFO L226 Difference]: Without dead ends: 3115 [2021-11-13 02:34:08,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:08,605 INFO L933 BasicCegarLoop]: 3348 mSDtfsCounter, 3537 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 418.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3537 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.25ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 508.61ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:08,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3537 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 15.25ms Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 508.61ms Time] [2021-11-13 02:34:08,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2021-11-13 02:34:08,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 3109. [2021-11-13 02:34:08,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3109 states, 2879 states have (on average 1.7877735324765545) internal successors, (5147), 2885 states have internal predecessors, (5147), 180 states have call successors, (180), 48 states have call predecessors, (180), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2021-11-13 02:34:08,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 5507 transitions. [2021-11-13 02:34:08,782 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 5507 transitions. Word has length 143 [2021-11-13 02:34:08,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:08,782 INFO L470 AbstractCegarLoop]: Abstraction has 3109 states and 5507 transitions. [2021-11-13 02:34:08,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 02:34:08,783 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 5507 transitions. [2021-11-13 02:34:08,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 02:34:08,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:08,791 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:08,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:09,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:09,016 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:09,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:09,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1238892444, now seen corresponding path program 1 times [2021-11-13 02:34:09,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:09,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301248067] [2021-11-13 02:34:09,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:09,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:34:09,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:09,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301248067] [2021-11-13 02:34:09,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301248067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:09,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249647751] [2021-11-13 02:34:09,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:09,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:09,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:09,294 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:09,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 02:34:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:09,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:34:09,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 02:34:09,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:10,250 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-13 02:34:10,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249647751] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:10,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:34:10,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-13 02:34:10,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464954568] [2021-11-13 02:34:10,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:10,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:34:10,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:10,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:34:10,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:10,256 INFO L87 Difference]: Start difference. First operand 3109 states and 5507 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 02:34:10,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:10,989 INFO L93 Difference]: Finished difference Result 6010 states and 10048 transitions. [2021-11-13 02:34:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:34:10,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2021-11-13 02:34:10,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:11,037 INFO L225 Difference]: With dead ends: 6010 [2021-11-13 02:34:11,038 INFO L226 Difference]: Without dead ends: 4547 [2021-11-13 02:34:11,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:11,049 INFO L933 BasicCegarLoop]: 3326 mSDtfsCounter, 3519 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 414.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3519 SdHoareTripleChecker+Valid, 3566 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.59ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 496.97ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:11,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3519 Valid, 3566 Invalid, 321 Unknown, 0 Unchecked, 16.59ms Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 496.97ms Time] [2021-11-13 02:34:11,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4547 states. [2021-11-13 02:34:11,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4547 to 4537. [2021-11-13 02:34:11,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4537 states, 4091 states have (on average 1.7049621119530678) internal successors, (6975), 4101 states have internal predecessors, (6975), 348 states have call successors, (348), 96 states have call predecessors, (348), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2021-11-13 02:34:11,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4537 states to 4537 states and 7671 transitions. [2021-11-13 02:34:11,347 INFO L78 Accepts]: Start accepts. Automaton has 4537 states and 7671 transitions. Word has length 143 [2021-11-13 02:34:11,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:11,347 INFO L470 AbstractCegarLoop]: Abstraction has 4537 states and 7671 transitions. [2021-11-13 02:34:11,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 02:34:11,348 INFO L276 IsEmpty]: Start isEmpty. Operand 4537 states and 7671 transitions. [2021-11-13 02:34:11,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 02:34:11,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:11,361 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:11,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:11,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:11,586 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:11,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:11,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1828602594, now seen corresponding path program 1 times [2021-11-13 02:34:11,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:11,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187631272] [2021-11-13 02:34:11,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:11,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:34:11,703 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:11,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187631272] [2021-11-13 02:34:11,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187631272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:11,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366440204] [2021-11-13 02:34:11,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:11,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:11,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:11,706 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:11,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 02:34:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:12,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 1104 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:34:12,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 02:34:12,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 02:34:12,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366440204] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:12,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:34:12,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-13 02:34:12,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190856489] [2021-11-13 02:34:12,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:12,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:34:12,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:12,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:34:12,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:12,715 INFO L87 Difference]: Start difference. First operand 4537 states and 7671 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 02:34:13,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:13,582 INFO L93 Difference]: Finished difference Result 10270 states and 16612 transitions. [2021-11-13 02:34:13,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:34:13,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2021-11-13 02:34:13,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:13,653 INFO L225 Difference]: With dead ends: 10270 [2021-11-13 02:34:13,654 INFO L226 Difference]: Without dead ends: 7379 [2021-11-13 02:34:13,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:13,676 INFO L933 BasicCegarLoop]: 3346 mSDtfsCounter, 3543 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 456.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3543 SdHoareTripleChecker+Valid, 3586 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.24ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 552.59ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:13,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3543 Valid, 3586 Invalid, 321 Unknown, 0 Unchecked, 16.24ms Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 552.59ms Time] [2021-11-13 02:34:13,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7379 states. [2021-11-13 02:34:14,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7379 to 7361. [2021-11-13 02:34:14,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7361 states, 6491 states have (on average 1.6304113387767678) internal successors, (10583), 6509 states have internal predecessors, (10583), 676 states have call successors, (676), 192 states have call predecessors, (676), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2021-11-13 02:34:14,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7361 states to 7361 states and 11935 transitions. [2021-11-13 02:34:14,178 INFO L78 Accepts]: Start accepts. Automaton has 7361 states and 11935 transitions. Word has length 143 [2021-11-13 02:34:14,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:14,179 INFO L470 AbstractCegarLoop]: Abstraction has 7361 states and 11935 transitions. [2021-11-13 02:34:14,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 02:34:14,180 INFO L276 IsEmpty]: Start isEmpty. Operand 7361 states and 11935 transitions. [2021-11-13 02:34:14,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 02:34:14,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:14,202 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:14,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:14,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:14,430 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:14,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:14,431 INFO L85 PathProgramCache]: Analyzing trace with hash -91515744, now seen corresponding path program 1 times [2021-11-13 02:34:14,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:14,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721750111] [2021-11-13 02:34:14,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:14,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:34:14,573 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:14,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721750111] [2021-11-13 02:34:14,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721750111] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:14,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398159596] [2021-11-13 02:34:14,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:14,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:14,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:14,578 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:14,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 02:34:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:14,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:34:14,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:15,196 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 02:34:15,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:15,554 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 02:34:15,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398159596] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:15,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:34:15,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-13 02:34:15,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805836565] [2021-11-13 02:34:15,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:15,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:34:15,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:15,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:34:15,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:15,569 INFO L87 Difference]: Start difference. First operand 7361 states and 11935 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 02:34:16,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:16,780 INFO L93 Difference]: Finished difference Result 18694 states and 29540 transitions. [2021-11-13 02:34:16,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:34:16,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2021-11-13 02:34:16,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:16,889 INFO L225 Difference]: With dead ends: 18694 [2021-11-13 02:34:16,890 INFO L226 Difference]: Without dead ends: 12979 [2021-11-13 02:34:16,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:16,926 INFO L933 BasicCegarLoop]: 3356 mSDtfsCounter, 3546 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 432.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3546 SdHoareTripleChecker+Valid, 3596 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.82ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 520.07ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:16,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3546 Valid, 3596 Invalid, 324 Unknown, 0 Unchecked, 17.82ms Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 520.07ms Time] [2021-11-13 02:34:16,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12979 states. [2021-11-13 02:34:17,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12979 to 12945. [2021-11-13 02:34:17,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12945 states, 11243 states have (on average 1.574579738503958) internal successors, (17703), 11277 states have internal predecessors, (17703), 1316 states have call successors, (1316), 384 states have call predecessors, (1316), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2021-11-13 02:34:17,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 20335 transitions. [2021-11-13 02:34:17,574 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 20335 transitions. Word has length 143 [2021-11-13 02:34:17,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:17,575 INFO L470 AbstractCegarLoop]: Abstraction has 12945 states and 20335 transitions. [2021-11-13 02:34:17,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 02:34:17,575 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 20335 transitions. [2021-11-13 02:34:17,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 02:34:17,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:17,609 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:17,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:17,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-13 02:34:17,822 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:17,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:17,823 INFO L85 PathProgramCache]: Analyzing trace with hash -598116898, now seen corresponding path program 1 times [2021-11-13 02:34:17,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:17,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931178167] [2021-11-13 02:34:17,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:17,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:34:17,958 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:17,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931178167] [2021-11-13 02:34:17,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931178167] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:17,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040047835] [2021-11-13 02:34:17,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:17,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:17,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:17,960 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:17,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 02:34:18,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:18,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:34:18,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 02:34:18,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 02:34:18,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040047835] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:18,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:34:18,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-13 02:34:18,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314101248] [2021-11-13 02:34:18,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:18,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:34:18,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:18,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:34:18,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:18,869 INFO L87 Difference]: Start difference. First operand 12945 states and 20335 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 02:34:20,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:20,276 INFO L93 Difference]: Finished difference Result 35350 states and 54996 transitions. [2021-11-13 02:34:20,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:34:20,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2021-11-13 02:34:20,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:20,396 INFO L225 Difference]: With dead ends: 35350 [2021-11-13 02:34:20,401 INFO L226 Difference]: Without dead ends: 24051 [2021-11-13 02:34:20,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:20,453 INFO L933 BasicCegarLoop]: 3326 mSDtfsCounter, 3516 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 404.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3516 SdHoareTripleChecker+Valid, 3566 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.53ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 497.68ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:20,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3516 Valid, 3566 Invalid, 321 Unknown, 0 Unchecked, 13.53ms Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 497.68ms Time] [2021-11-13 02:34:20,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24051 states. [2021-11-13 02:34:21,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24051 to 23985. [2021-11-13 02:34:21,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23985 states, 20651 states have (on average 1.53750423708295) internal successors, (31751), 20717 states have internal predecessors, (31751), 2564 states have call successors, (2564), 768 states have call predecessors, (2564), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2021-11-13 02:34:21,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23985 states to 23985 states and 36879 transitions. [2021-11-13 02:34:21,768 INFO L78 Accepts]: Start accepts. Automaton has 23985 states and 36879 transitions. Word has length 143 [2021-11-13 02:34:21,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:21,768 INFO L470 AbstractCegarLoop]: Abstraction has 23985 states and 36879 transitions. [2021-11-13 02:34:21,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 02:34:21,769 INFO L276 IsEmpty]: Start isEmpty. Operand 23985 states and 36879 transitions. [2021-11-13 02:34:21,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 02:34:21,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:21,827 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:21,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:22,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:22,042 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:22,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:22,043 INFO L85 PathProgramCache]: Analyzing trace with hash -2007337060, now seen corresponding path program 1 times [2021-11-13 02:34:22,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:22,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926123967] [2021-11-13 02:34:22,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:22,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 02:34:22,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:22,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926123967] [2021-11-13 02:34:22,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926123967] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:22,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919255446] [2021-11-13 02:34:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:22,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:22,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:22,184 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:22,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 02:34:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:22,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:34:22,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 02:34:22,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 02:34:22,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919255446] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:22,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:34:22,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-13 02:34:22,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674683297] [2021-11-13 02:34:22,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:22,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:34:22,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:22,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:34:22,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:22,899 INFO L87 Difference]: Start difference. First operand 23985 states and 36879 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 02:34:24,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:24,831 INFO L93 Difference]: Finished difference Result 68278 states and 105108 transitions. [2021-11-13 02:34:24,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:34:24,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2021-11-13 02:34:24,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:25,063 INFO L225 Difference]: With dead ends: 68278 [2021-11-13 02:34:25,063 INFO L226 Difference]: Without dead ends: 45939 [2021-11-13 02:34:25,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:34:25,151 INFO L933 BasicCegarLoop]: 3326 mSDtfsCounter, 3531 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 398.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3531 SdHoareTripleChecker+Valid, 3566 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.41ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 484.09ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:25,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3531 Valid, 3566 Invalid, 321 Unknown, 0 Unchecked, 9.41ms Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 484.09ms Time] [2021-11-13 02:34:25,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45939 states. [2021-11-13 02:34:27,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45939 to 45809. [2021-11-13 02:34:27,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45809 states, 39275 states have (on average 1.514016549968173) internal successors, (59463), 39405 states have internal predecessors, (59463), 4996 states have call successors, (4996), 1536 states have call predecessors, (4996), 1536 states have return successors, (4996), 4868 states have call predecessors, (4996), 4996 states have call successors, (4996) [2021-11-13 02:34:27,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45809 states to 45809 states and 69455 transitions. [2021-11-13 02:34:27,590 INFO L78 Accepts]: Start accepts. Automaton has 45809 states and 69455 transitions. Word has length 143 [2021-11-13 02:34:27,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:27,591 INFO L470 AbstractCegarLoop]: Abstraction has 45809 states and 69455 transitions. [2021-11-13 02:34:27,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 02:34:27,592 INFO L276 IsEmpty]: Start isEmpty. Operand 45809 states and 69455 transitions. [2021-11-13 02:34:28,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 02:34:28,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:28,056 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:28,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:28,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f374638e-bf63-4d83-a39f-e80653898c42/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:28,282 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:28,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:28,283 INFO L85 PathProgramCache]: Analyzing trace with hash 911868446, now seen corresponding path program 1 times [2021-11-13 02:34:28,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:28,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295739442] [2021-11-13 02:34:28,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:28,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 02:34:28,452 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:28,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295739442] [2021-11-13 02:34:28,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295739442] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:28,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:28,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 02:34:28,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153192471] [2021-11-13 02:34:28,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:28,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:34:28,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:28,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:34:28,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:34:28,458 INFO L87 Difference]: Start difference. First operand 45809 states and 69455 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-13 02:34:33,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:33,318 INFO L93 Difference]: Finished difference Result 156917 states and 235730 transitions. [2021-11-13 02:34:33,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:34:33,319 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 143 [2021-11-13 02:34:33,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:34,355 INFO L225 Difference]: With dead ends: 156917 [2021-11-13 02:34:34,356 INFO L226 Difference]: Without dead ends: 112755 [2021-11-13 02:34:34,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:34:34,814 INFO L933 BasicCegarLoop]: 3329 mSDtfsCounter, 4482 mSDsluCounter, 7126 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 820.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4504 SdHoareTripleChecker+Valid, 9930 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.37ms SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1004.62ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:34,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4504 Valid, 9930 Invalid, 1101 Unknown, 0 Unchecked, 41.37ms Time], IncrementalHoareTripleChecker [152 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 1004.62ms Time] [2021-11-13 02:34:34,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112755 states. [2021-11-13 02:34:39,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112755 to 88433. [2021-11-13 02:34:39,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88433 states, 75627 states have (on average 1.4988165602232006) internal successors, (113351), 75885 states have internal predecessors, (113351), 9732 states have call successors, (9732), 3072 states have call predecessors, (9732), 3072 states have return successors, (9732), 9476 states have call predecessors, (9732), 9732 states have call successors, (9732) [2021-11-13 02:34:39,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88433 states to 88433 states and 132815 transitions. [2021-11-13 02:34:39,806 INFO L78 Accepts]: Start accepts. Automaton has 88433 states and 132815 transitions. Word has length 143 [2021-11-13 02:34:39,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:39,809 INFO L470 AbstractCegarLoop]: Abstraction has 88433 states and 132815 transitions. [2021-11-13 02:34:39,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-13 02:34:39,809 INFO L276 IsEmpty]: Start isEmpty. Operand 88433 states and 132815 transitions. [2021-11-13 02:34:39,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 02:34:39,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:39,963 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:39,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 02:34:39,963 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:39,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:39,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1416129421, now seen corresponding path program 1 times [2021-11-13 02:34:39,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:39,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867537294] [2021-11-13 02:34:39,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:39,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 02:34:40,162 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:40,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867537294] [2021-11-13 02:34:40,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867537294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:40,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:40,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 02:34:40,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179170255] [2021-11-13 02:34:40,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:40,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:34:40,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:40,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:34:40,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:34:40,166 INFO L87 Difference]: Start difference. First operand 88433 states and 132815 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-13 02:34:47,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:47,070 INFO L93 Difference]: Finished difference Result 238325 states and 357457 transitions. [2021-11-13 02:34:47,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:34:47,071 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 144 [2021-11-13 02:34:47,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:48,105 INFO L225 Difference]: With dead ends: 238325 [2021-11-13 02:34:48,105 INFO L226 Difference]: Without dead ends: 151539 [2021-11-13 02:34:48,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:34:48,413 INFO L933 BasicCegarLoop]: 3321 mSDtfsCounter, 4313 mSDsluCounter, 7185 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1297.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4319 SdHoareTripleChecker+Valid, 9976 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.76ms SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1507.57ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:48,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4319 Valid, 9976 Invalid, 1109 Unknown, 0 Unchecked, 34.76ms Time], IncrementalHoareTripleChecker [160 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 1507.57ms Time] [2021-11-13 02:34:48,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151539 states. [2021-11-13 02:34:54,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151539 to 130801. [2021-11-13 02:34:54,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130801 states, 111723 states have (on average 1.4911790768239306) internal successors, (166599), 112109 states have internal predecessors, (166599), 14468 states have call successors, (14468), 4608 states have call predecessors, (14468), 4608 states have return successors, (14468), 14084 states have call predecessors, (14468), 14468 states have call successors, (14468) [2021-11-13 02:34:55,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130801 states to 130801 states and 195535 transitions. [2021-11-13 02:34:55,733 INFO L78 Accepts]: Start accepts. Automaton has 130801 states and 195535 transitions. Word has length 144 [2021-11-13 02:34:55,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:55,734 INFO L470 AbstractCegarLoop]: Abstraction has 130801 states and 195535 transitions. [2021-11-13 02:34:55,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-13 02:34:55,734 INFO L276 IsEmpty]: Start isEmpty. Operand 130801 states and 195535 transitions. [2021-11-13 02:34:55,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 02:34:55,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:55,961 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:55,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 02:34:55,962 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:55,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:55,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1916640318, now seen corresponding path program 1 times [2021-11-13 02:34:55,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:55,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541294386] [2021-11-13 02:34:55,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:55,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 02:34:56,149 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:56,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541294386] [2021-11-13 02:34:56,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541294386] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:56,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:56,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 02:34:56,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713247094] [2021-11-13 02:34:56,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:56,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:34:56,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:56,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:34:56,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:34:56,153 INFO L87 Difference]: Start difference. First operand 130801 states and 195535 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)