./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.04.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.04.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs --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 c77578a373441dc4befdd6b2c62472e20adb967aa702c242a875876828ccf992 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:23:05,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:23:05,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:23:05,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:23:05,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:23:05,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:23:05,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:23:06,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:23:06,009 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:23:06,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:23:06,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:23:06,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:23:06,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:23:06,031 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:23:06,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:23:06,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:23:06,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:23:06,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:23:06,051 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:23:06,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:23:06,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:23:06,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:23:06,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:23:06,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:23:06,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:23:06,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:23:06,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:23:06,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:23:06,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:23:06,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:23:06,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:23:06,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:23:06,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:23:06,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:23:06,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:23:06,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:23:06,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:23:06,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:23:06,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:23:06,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:23:06,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:23:06,099 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:23:06,162 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:23:06,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:23:06,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:23:06,164 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:23:06,165 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:23:06,165 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:23:06,165 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:23:06,165 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:23:06,166 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:23:06,166 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:23:06,166 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:23:06,167 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:23:06,167 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:23:06,167 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:23:06,168 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:23:06,168 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:23:06,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:23:06,169 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:23:06,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:23:06,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:23:06,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:23:06,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:23:06,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:23:06,171 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:23:06,171 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:23:06,172 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:23:06,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:23:06,172 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:23:06,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:23:06,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:23:06,173 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:23:06,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:23:06,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:23:06,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:23:06,174 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:23:06,175 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:23:06,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:23:06,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:23:06,176 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:23:06,176 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:23:06,176 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_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c77578a373441dc4befdd6b2c62472e20adb967aa702c242a875876828ccf992 [2021-11-19 14:23:06,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:23:06,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:23:06,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:23:06,512 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:23:06,513 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:23:06,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.04.cil-1.c [2021-11-19 14:23:06,680 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/data/3b0c70025/567dad4f79f14769b88a68939ee8d585/FLAG97c5e397f [2021-11-19 14:23:08,022 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:23:08,024 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/sv-benchmarks/c/combinations/Problem05_label45+token_ring.04.cil-1.c [2021-11-19 14:23:08,095 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/data/3b0c70025/567dad4f79f14769b88a68939ee8d585/FLAG97c5e397f [2021-11-19 14:23:08,617 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/data/3b0c70025/567dad4f79f14769b88a68939ee8d585 [2021-11-19 14:23:08,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:23:08,629 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:23:08,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:23:08,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:23:08,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:23:08,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:23:08" (1/1) ... [2021-11-19 14:23:08,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23dc707b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:23:08, skipping insertion in model container [2021-11-19 14:23:08,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:23:08" (1/1) ... [2021-11-19 14:23:08,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:23:09,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:23:12,180 WARN L230 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_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/sv-benchmarks/c/combinations/Problem05_label45+token_ring.04.cil-1.c[380323,380336] [2021-11-19 14:23:12,221 WARN L230 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_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/sv-benchmarks/c/combinations/Problem05_label45+token_ring.04.cil-1.c[383339,383352] [2021-11-19 14:23:12,562 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:23:12,577 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:23:14,237 WARN L230 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_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/sv-benchmarks/c/combinations/Problem05_label45+token_ring.04.cil-1.c[380323,380336] [2021-11-19 14:23:14,254 WARN L230 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_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/sv-benchmarks/c/combinations/Problem05_label45+token_ring.04.cil-1.c[383339,383352] [2021-11-19 14:23:14,293 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:23:14,427 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:23:14,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:23:14 WrapperNode [2021-11-19 14:23:14,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:23:14,429 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:23:14,429 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:23:14,429 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:23:14,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:23:14" (1/1) ... [2021-11-19 14:23:14,598 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:23:14" (1/1) ... [2021-11-19 14:23:15,311 INFO L137 Inliner]: procedures = 52, calls = 53, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 12735 [2021-11-19 14:23:15,312 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:23:15,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:23:15,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:23:15,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:23:15,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:23:14" (1/1) ... [2021-11-19 14:23:15,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:23:14" (1/1) ... [2021-11-19 14:23:15,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:23:14" (1/1) ... [2021-11-19 14:23:15,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:23:14" (1/1) ... [2021-11-19 14:23:15,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:23:14" (1/1) ... [2021-11-19 14:23:16,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:23:14" (1/1) ... [2021-11-19 14:23:16,083 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:23:14" (1/1) ... [2021-11-19 14:23:16,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:23:16,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:23:16,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:23:16,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:23:16,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:23:14" (1/1) ... [2021-11-19 14:23:16,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:23:16,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:23:16,212 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:23:16,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:23:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:23:16,363 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-19 14:23:16,364 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-19 14:23:16,364 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-19 14:23:16,364 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-19 14:23:16,364 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-19 14:23:16,364 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-19 14:23:16,364 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-19 14:23:16,364 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-19 14:23:16,364 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-19 14:23:16,364 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-19 14:23:16,365 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-19 14:23:16,365 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-19 14:23:16,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:23:16,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:23:16,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:23:16,501 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:23:16,503 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:23:26,190 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:23:29,300 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:23:29,301 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-19 14:23:29,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:23:29 BoogieIcfgContainer [2021-11-19 14:23:29,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:23:29,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:23:29,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:23:29,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:23:29,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:23:08" (1/3) ... [2021-11-19 14:23:29,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f8a5d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:23:29, skipping insertion in model container [2021-11-19 14:23:29,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:23:14" (2/3) ... [2021-11-19 14:23:29,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f8a5d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:23:29, skipping insertion in model container [2021-11-19 14:23:29,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:23:29" (3/3) ... [2021-11-19 14:23:29,325 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.04.cil-1.c [2021-11-19 14:23:29,338 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:23:29,339 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-19 14:23:29,427 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:23:29,439 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 [2021-11-19 14:23:29,440 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-19 14:23:29,519 INFO L276 IsEmpty]: Start isEmpty. Operand has 1743 states, 1716 states have (on average 1.9726107226107226) internal successors, (3385), 1719 states have internal predecessors, (3385), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-19 14:23:29,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 14:23:29,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:29,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:23:29,538 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:29,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:29,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1527254023, now seen corresponding path program 1 times [2021-11-19 14:23:29,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:23:29,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735458642] [2021-11-19 14:23:29,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:29,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:23:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:23:29,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:23:29,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735458642] [2021-11-19 14:23:29,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735458642] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:23:29,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:23:29,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:23:29,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236119778] [2021-11-19 14:23:29,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:29,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:23:29,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:23:29,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:23:29,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:23:29,993 INFO L87 Difference]: Start difference. First operand has 1743 states, 1716 states have (on average 1.9726107226107226) internal successors, (3385), 1719 states have internal predecessors, (3385), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2021-11-19 14:23:31,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:31,316 INFO L93 Difference]: Finished difference Result 3569 states and 6979 transitions. [2021-11-19 14:23:31,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:23:31,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 43 [2021-11-19 14:23:31,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:31,368 INFO L225 Difference]: With dead ends: 3569 [2021-11-19 14:23:31,369 INFO L226 Difference]: Without dead ends: 1825 [2021-11-19 14:23:31,383 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 [2021-11-19 14:23:31,392 INFO L933 BasicCegarLoop]: 3271 mSDtfsCounter, 3515 mSDsluCounter, 3465 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3515 SdHoareTripleChecker+Valid, 6476 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:31,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3515 Valid, 6476 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:23:31,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2021-11-19 14:23:31,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1824. [2021-11-19 14:23:31,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1778 states have (on average 1.9482564679415073) internal successors, (3464), 1781 states have internal predecessors, (3464), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-11-19 14:23:31,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 3528 transitions. [2021-11-19 14:23:31,605 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 3528 transitions. Word has length 43 [2021-11-19 14:23:31,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:31,606 INFO L470 AbstractCegarLoop]: Abstraction has 1824 states and 3528 transitions. [2021-11-19 14:23:31,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2021-11-19 14:23:31,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 3528 transitions. [2021-11-19 14:23:31,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-19 14:23:31,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:31,614 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:23:31,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:23:31,615 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:31,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:31,616 INFO L85 PathProgramCache]: Analyzing trace with hash 414286499, now seen corresponding path program 1 times [2021-11-19 14:23:31,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:23:31,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136459515] [2021-11-19 14:23:31,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:31,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:23:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:23:31,887 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:23:31,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136459515] [2021-11-19 14:23:31,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136459515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:23:31,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392442019] [2021-11-19 14:23:31,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:31,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:23:31,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:23:31,895 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:23:31,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 14:23:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:32,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:23:32,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:23:32,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:32,642 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:23:32,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392442019] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:23:32,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:23:32,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:23:32,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664160854] [2021-11-19 14:23:32,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:32,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:23:32,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:23:32,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:23:32,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:23:32,648 INFO L87 Difference]: Start difference. First operand 1824 states and 3528 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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) [2021-11-19 14:23:33,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:33,430 INFO L93 Difference]: Finished difference Result 2173 states and 4035 transitions. [2021-11-19 14:23:33,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:23:33,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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 80 [2021-11-19 14:23:33,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:33,457 INFO L225 Difference]: With dead ends: 2173 [2021-11-19 14:23:33,457 INFO L226 Difference]: Without dead ends: 1995 [2021-11-19 14:23:33,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:23:33,463 INFO L933 BasicCegarLoop]: 3207 mSDtfsCounter, 3384 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3384 SdHoareTripleChecker+Valid, 3312 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:33,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3384 Valid, 3312 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:23:33,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2021-11-19 14:23:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1991. [2021-11-19 14:23:33,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1907 states have (on average 1.9113791295228106) internal successors, (3645), 1911 states have internal predecessors, (3645), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2021-11-19 14:23:33,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3761 transitions. [2021-11-19 14:23:33,576 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3761 transitions. Word has length 80 [2021-11-19 14:23:33,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:33,577 INFO L470 AbstractCegarLoop]: Abstraction has 1991 states and 3761 transitions. [2021-11-19 14:23:33,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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) [2021-11-19 14:23:33,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3761 transitions. [2021-11-19 14:23:33,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-19 14:23:33,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:33,591 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:23:33,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:23:33,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:23:33,806 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:33,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:33,807 INFO L85 PathProgramCache]: Analyzing trace with hash 934070915, now seen corresponding path program 1 times [2021-11-19 14:23:33,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:23:33,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126797644] [2021-11-19 14:23:33,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:33,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:23:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:23:33,928 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:23:33,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126797644] [2021-11-19 14:23:33,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126797644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:23:33,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187909643] [2021-11-19 14:23:33,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:33,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:23:33,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:23:33,931 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:23:33,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 14:23:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:34,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:23:34,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:23:34,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:23:34,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187909643] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:23:34,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:23:34,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:23:34,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406713369] [2021-11-19 14:23:34,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:34,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:23:34,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:23:34,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:23:34,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:23:34,553 INFO L87 Difference]: Start difference. First operand 1991 states and 3761 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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) [2021-11-19 14:23:35,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:35,141 INFO L93 Difference]: Finished difference Result 2668 states and 4736 transitions. [2021-11-19 14:23:35,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:23:35,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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 80 [2021-11-19 14:23:35,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:35,166 INFO L225 Difference]: With dead ends: 2668 [2021-11-19 14:23:35,167 INFO L226 Difference]: Without dead ends: 2323 [2021-11-19 14:23:35,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:23:35,175 INFO L933 BasicCegarLoop]: 3182 mSDtfsCounter, 3381 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3381 SdHoareTripleChecker+Valid, 3287 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:35,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3381 Valid, 3287 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:23:35,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-11-19 14:23:35,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2317. [2021-11-19 14:23:35,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2159 states have (on average 1.8503937007874016) internal successors, (3995), 2165 states have internal predecessors, (3995), 108 states have call successors, (108), 48 states have call predecessors, (108), 48 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-19 14:23:35,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 4211 transitions. [2021-11-19 14:23:35,342 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 4211 transitions. Word has length 80 [2021-11-19 14:23:35,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:35,343 INFO L470 AbstractCegarLoop]: Abstraction has 2317 states and 4211 transitions. [2021-11-19 14:23:35,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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) [2021-11-19 14:23:35,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 4211 transitions. [2021-11-19 14:23:35,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-19 14:23:35,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:35,349 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:23:35,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:23:35,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:23:35,563 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:35,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:35,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1650036387, now seen corresponding path program 1 times [2021-11-19 14:23:35,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:23:35,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423065350] [2021-11-19 14:23:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:35,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:23:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:23:35,688 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:23:35,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423065350] [2021-11-19 14:23:35,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423065350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:23:35,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:23:35,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:23:35,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158267638] [2021-11-19 14:23:35,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:35,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:23:35,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:23:35,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:23:35,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:23:35,692 INFO L87 Difference]: Start difference. First operand 2317 states and 4211 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 14:23:36,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:36,347 INFO L93 Difference]: Finished difference Result 2839 states and 4960 transitions. [2021-11-19 14:23:36,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:23:36,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2021-11-19 14:23:36,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:36,372 INFO L225 Difference]: With dead ends: 2839 [2021-11-19 14:23:36,373 INFO L226 Difference]: Without dead ends: 2493 [2021-11-19 14:23:36,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:23:36,377 INFO L933 BasicCegarLoop]: 3228 mSDtfsCounter, 55 mSDsluCounter, 3406 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 6402 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:36,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 6402 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:23:36,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2021-11-19 14:23:36,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2421. [2021-11-19 14:23:36,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 2255 states have (on average 1.8425720620842572) internal successors, (4155), 2261 states have internal predecessors, (4155), 112 states have call successors, (112), 52 states have call predecessors, (112), 52 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-19 14:23:36,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 4379 transitions. [2021-11-19 14:23:36,513 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 4379 transitions. Word has length 80 [2021-11-19 14:23:36,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:36,514 INFO L470 AbstractCegarLoop]: Abstraction has 2421 states and 4379 transitions. [2021-11-19 14:23:36,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 14:23:36,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 4379 transitions. [2021-11-19 14:23:36,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 14:23:36,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:36,521 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:23:36,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 14:23:36,521 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:36,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:36,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1124271120, now seen corresponding path program 1 times [2021-11-19 14:23:36,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:23:36,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534210220] [2021-11-19 14:23:36,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:36,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:23:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-19 14:23:36,625 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:23:36,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534210220] [2021-11-19 14:23:36,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534210220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:23:36,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:23:36,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:23:36,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139241830] [2021-11-19 14:23:36,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:36,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:23:36,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:23:36,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:23:36,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:23:36,629 INFO L87 Difference]: Start difference. First operand 2421 states and 4379 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:23:37,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:37,220 INFO L93 Difference]: Finished difference Result 3934 states and 6568 transitions. [2021-11-19 14:23:37,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:23:37,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 106 [2021-11-19 14:23:37,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:37,248 INFO L225 Difference]: With dead ends: 3934 [2021-11-19 14:23:37,248 INFO L226 Difference]: Without dead ends: 3159 [2021-11-19 14:23:37,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:23:37,254 INFO L933 BasicCegarLoop]: 3189 mSDtfsCounter, 3375 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3375 SdHoareTripleChecker+Valid, 3294 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:37,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3375 Valid, 3294 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:23:37,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2021-11-19 14:23:37,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 3145. [2021-11-19 14:23:37,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 2827 states have (on average 1.7541563494870889) internal successors, (4959), 2837 states have internal predecessors, (4959), 212 states have call successors, (212), 104 states have call predecessors, (212), 104 states have return successors, (212), 204 states have call predecessors, (212), 212 states have call successors, (212) [2021-11-19 14:23:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 5383 transitions. [2021-11-19 14:23:37,564 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 5383 transitions. Word has length 106 [2021-11-19 14:23:37,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:37,564 INFO L470 AbstractCegarLoop]: Abstraction has 3145 states and 5383 transitions. [2021-11-19 14:23:37,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:23:37,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 5383 transitions. [2021-11-19 14:23:37,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 14:23:37,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:37,574 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:23:37,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 14:23:37,574 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:37,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:37,575 INFO L85 PathProgramCache]: Analyzing trace with hash -475711734, now seen corresponding path program 1 times [2021-11-19 14:23:37,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:23:37,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185766596] [2021-11-19 14:23:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:37,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:23:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-19 14:23:37,683 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:23:37,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185766596] [2021-11-19 14:23:37,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185766596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:23:37,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:23:37,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:23:37,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546909026] [2021-11-19 14:23:37,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:37,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:23:37,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:23:37,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:23:37,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:23:37,687 INFO L87 Difference]: Start difference. First operand 3145 states and 5383 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:23:38,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:38,332 INFO L93 Difference]: Finished difference Result 6070 states and 9556 transitions. [2021-11-19 14:23:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:23:38,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 106 [2021-11-19 14:23:38,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:38,375 INFO L225 Difference]: With dead ends: 6070 [2021-11-19 14:23:38,375 INFO L226 Difference]: Without dead ends: 4571 [2021-11-19 14:23:38,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:23:38,388 INFO L933 BasicCegarLoop]: 3187 mSDtfsCounter, 3378 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3378 SdHoareTripleChecker+Valid, 3292 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:38,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3378 Valid, 3292 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:23:38,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4571 states. [2021-11-19 14:23:38,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4571 to 4545. [2021-11-19 14:23:38,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4545 states, 3931 states have (on average 1.6502162299669296) internal successors, (6487), 3949 states have internal predecessors, (6487), 404 states have call successors, (404), 208 states have call predecessors, (404), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2021-11-19 14:23:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4545 states to 4545 states and 7295 transitions. [2021-11-19 14:23:38,659 INFO L78 Accepts]: Start accepts. Automaton has 4545 states and 7295 transitions. Word has length 106 [2021-11-19 14:23:38,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:38,660 INFO L470 AbstractCegarLoop]: Abstraction has 4545 states and 7295 transitions. [2021-11-19 14:23:38,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:23:38,660 INFO L276 IsEmpty]: Start isEmpty. Operand 4545 states and 7295 transitions. [2021-11-19 14:23:38,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:23:38,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:38,676 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:23:38,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 14:23:38,677 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:38,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:38,678 INFO L85 PathProgramCache]: Analyzing trace with hash -832557665, now seen corresponding path program 1 times [2021-11-19 14:23:38,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:23:38,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381018801] [2021-11-19 14:23:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:38,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:23:38,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:23:38,770 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:23:38,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381018801] [2021-11-19 14:23:38,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381018801] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:23:38,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375192163] [2021-11-19 14:23:38,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:38,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:23:38,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:23:38,773 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:23:38,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 14:23:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:38,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:23:38,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:23:39,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:23:39,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375192163] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:23:39,482 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:23:39,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-11-19 14:23:39,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97656680] [2021-11-19 14:23:39,483 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:39,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:23:39,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:23:39,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:23:39,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:23:39,511 INFO L87 Difference]: Start difference. First operand 4545 states and 7295 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:23:40,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:40,315 INFO L93 Difference]: Finished difference Result 7205 states and 11065 transitions. [2021-11-19 14:23:40,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:23:40,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 120 [2021-11-19 14:23:40,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:40,365 INFO L225 Difference]: With dead ends: 7205 [2021-11-19 14:23:40,365 INFO L226 Difference]: Without dead ends: 5719 [2021-11-19 14:23:40,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:23:40,375 INFO L933 BasicCegarLoop]: 3238 mSDtfsCounter, 148 mSDsluCounter, 3425 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 6430 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:40,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 6430 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:23:40,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5719 states. [2021-11-19 14:23:40,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5719 to 5053. [2021-11-19 14:23:40,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5053 states, 4391 states have (on average 1.6467774994306537) internal successors, (7231), 4409 states have internal predecessors, (7231), 428 states have call successors, (428), 232 states have call predecessors, (428), 232 states have return successors, (428), 412 states have call predecessors, (428), 428 states have call successors, (428) [2021-11-19 14:23:40,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5053 states to 5053 states and 8087 transitions. [2021-11-19 14:23:40,714 INFO L78 Accepts]: Start accepts. Automaton has 5053 states and 8087 transitions. Word has length 120 [2021-11-19 14:23:40,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:40,715 INFO L470 AbstractCegarLoop]: Abstraction has 5053 states and 8087 transitions. [2021-11-19 14:23:40,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:23:40,716 INFO L276 IsEmpty]: Start isEmpty. Operand 5053 states and 8087 transitions. [2021-11-19 14:23:40,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:23:40,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:40,737 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:23:40,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-19 14:23:40,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-19 14:23:40,957 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:40,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:40,958 INFO L85 PathProgramCache]: Analyzing trace with hash -82657837, now seen corresponding path program 1 times [2021-11-19 14:23:40,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:23:40,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730753616] [2021-11-19 14:23:40,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:40,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:23:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:23:41,085 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:23:41,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730753616] [2021-11-19 14:23:41,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730753616] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:23:41,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101722872] [2021-11-19 14:23:41,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:41,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:23:41,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:23:41,088 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:23:41,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 14:23:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:41,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:23:41,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:23:41,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:23:41,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101722872] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:23:41,885 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:23:41,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-11-19 14:23:41,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027269676] [2021-11-19 14:23:41,886 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:41,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:23:41,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:23:41,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:23:41,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:23:41,889 INFO L87 Difference]: Start difference. First operand 5053 states and 8087 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:23:42,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:42,959 INFO L93 Difference]: Finished difference Result 8297 states and 12733 transitions. [2021-11-19 14:23:42,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:23:42,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 120 [2021-11-19 14:23:42,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:43,008 INFO L225 Difference]: With dead ends: 8297 [2021-11-19 14:23:43,008 INFO L226 Difference]: Without dead ends: 6551 [2021-11-19 14:23:43,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:23:43,020 INFO L933 BasicCegarLoop]: 3251 mSDtfsCounter, 105 mSDsluCounter, 6831 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 9618 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:43,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 9618 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:23:43,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6551 states. [2021-11-19 14:23:43,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6551 to 5773. [2021-11-19 14:23:43,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5773 states, 5039 states have (on average 1.6398094860091288) internal successors, (8263), 5057 states have internal predecessors, (8263), 464 states have call successors, (464), 268 states have call predecessors, (464), 268 states have return successors, (464), 448 states have call predecessors, (464), 464 states have call successors, (464) [2021-11-19 14:23:43,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5773 states to 5773 states and 9191 transitions. [2021-11-19 14:23:43,605 INFO L78 Accepts]: Start accepts. Automaton has 5773 states and 9191 transitions. Word has length 120 [2021-11-19 14:23:43,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:43,606 INFO L470 AbstractCegarLoop]: Abstraction has 5773 states and 9191 transitions. [2021-11-19 14:23:43,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:23:43,607 INFO L276 IsEmpty]: Start isEmpty. Operand 5773 states and 9191 transitions. [2021-11-19 14:23:43,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:23:43,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:43,632 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:23:43,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:23:43,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-19 14:23:43,847 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:43,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:43,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1927935268, now seen corresponding path program 1 times [2021-11-19 14:23:43,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:23:43,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131312534] [2021-11-19 14:23:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:43,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:23:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-19 14:23:43,942 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:23:43,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131312534] [2021-11-19 14:23:43,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131312534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:23:43,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262979636] [2021-11-19 14:23:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:43,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:23:43,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:23:43,945 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:23:43,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 14:23:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:44,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:23:44,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:44,452 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:23:44,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-19 14:23:44,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262979636] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:23:44,777 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:23:44,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-11-19 14:23:44,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929292453] [2021-11-19 14:23:44,778 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:44,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:23:44,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:23:44,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:23:44,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:23:44,781 INFO L87 Difference]: Start difference. First operand 5773 states and 9191 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:23:45,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:45,753 INFO L93 Difference]: Finished difference Result 9849 states and 15103 transitions. [2021-11-19 14:23:45,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:23:45,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 120 [2021-11-19 14:23:45,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:45,799 INFO L225 Difference]: With dead ends: 9849 [2021-11-19 14:23:45,799 INFO L226 Difference]: Without dead ends: 7707 [2021-11-19 14:23:45,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:23:45,815 INFO L933 BasicCegarLoop]: 3256 mSDtfsCounter, 184 mSDsluCounter, 3437 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 6458 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:45,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 6458 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:23:45,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7707 states. [2021-11-19 14:23:46,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7707 to 6817. [2021-11-19 14:23:46,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6817 states, 5975 states have (on average 1.6299581589958159) internal successors, (9739), 5993 states have internal predecessors, (9739), 518 states have call successors, (518), 322 states have call predecessors, (518), 322 states have return successors, (518), 502 states have call predecessors, (518), 518 states have call successors, (518) [2021-11-19 14:23:46,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6817 states to 6817 states and 10775 transitions. [2021-11-19 14:23:46,304 INFO L78 Accepts]: Start accepts. Automaton has 6817 states and 10775 transitions. Word has length 120 [2021-11-19 14:23:46,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:46,305 INFO L470 AbstractCegarLoop]: Abstraction has 6817 states and 10775 transitions. [2021-11-19 14:23:46,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:23:46,306 INFO L276 IsEmpty]: Start isEmpty. Operand 6817 states and 10775 transitions. [2021-11-19 14:23:46,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:23:46,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:46,335 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:23:46,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:23:46,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:23:46,551 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:46,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:46,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1617573369, now seen corresponding path program 1 times [2021-11-19 14:23:46,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:23:46,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363725835] [2021-11-19 14:23:46,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:46,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:23:46,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-19 14:23:46,667 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:23:46,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363725835] [2021-11-19 14:23:46,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363725835] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:23:46,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597204540] [2021-11-19 14:23:46,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:46,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:23:46,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:23:46,670 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:23:46,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 14:23:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:46,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:23:46,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:23:47,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-19 14:23:47,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597204540] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:23:47,527 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:23:47,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-11-19 14:23:47,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126037223] [2021-11-19 14:23:47,531 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:23:47,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:23:47,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:23:47,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:23:47,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:23:47,534 INFO L87 Difference]: Start difference. First operand 6817 states and 10775 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:23:48,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:23:48,649 INFO L93 Difference]: Finished difference Result 11547 states and 17758 transitions. [2021-11-19 14:23:48,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:23:48,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 120 [2021-11-19 14:23:48,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:23:48,695 INFO L225 Difference]: With dead ends: 11547 [2021-11-19 14:23:48,695 INFO L226 Difference]: Without dead ends: 8856 [2021-11-19 14:23:48,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:23:48,712 INFO L933 BasicCegarLoop]: 3238 mSDtfsCounter, 81 mSDsluCounter, 6816 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 9592 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:23:48,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 9592 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:23:48,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8856 states. [2021-11-19 14:23:49,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8856 to 8302. [2021-11-19 14:23:49,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8302 states, 7298 states have (on average 1.6156481227733626) internal successors, (11791), 7316 states have internal predecessors, (11791), 599 states have call successors, (599), 403 states have call predecessors, (599), 403 states have return successors, (599), 583 states have call predecessors, (599), 599 states have call successors, (599) [2021-11-19 14:23:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8302 states to 8302 states and 12989 transitions. [2021-11-19 14:23:49,256 INFO L78 Accepts]: Start accepts. Automaton has 8302 states and 12989 transitions. Word has length 120 [2021-11-19 14:23:49,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:23:49,257 INFO L470 AbstractCegarLoop]: Abstraction has 8302 states and 12989 transitions. [2021-11-19 14:23:49,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:23:49,258 INFO L276 IsEmpty]: Start isEmpty. Operand 8302 states and 12989 transitions. [2021-11-19 14:23:49,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:23:49,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:23:49,291 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:23:49,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:23:49,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-19 14:23:49,507 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:23:49,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:23:49,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1411953984, now seen corresponding path program 2 times [2021-11-19 14:23:49,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:23:49,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075090866] [2021-11-19 14:23:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:23:49,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:23:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:23:49,654 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:23:49,654 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:23:49,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075090866] [2021-11-19 14:23:49,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075090866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:23:49,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660292825] [2021-11-19 14:23:49,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:23:49,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:23:49,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:23:49,657 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:23:49,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 14:23:49,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 14:23:49,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:23:49,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 14:23:49,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:23:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 56 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:23:50,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:23:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 19 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:23:51,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660292825] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:23:51,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2069377873] [2021-11-19 14:23:51,129 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2021-11-19 14:23:51,130 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:23:51,137 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 14:23:51,145 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 14:23:51,146 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 14:23:51,293 INFO L180 QuantifierPusher]: treesize reduction 8, result has 96.2 percent of original size [2021-11-19 14:23:51,308 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-11-19 14:23:51,319 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:51,328 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 182 [2021-11-19 14:23:51,348 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:51,356 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 182 [2021-11-19 14:23:51,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:51,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:51,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:51,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:51,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:51,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:51,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:51,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:51,931 INFO L180 QuantifierPusher]: treesize reduction 267, result has 49.9 percent of original size [2021-11-19 14:23:51,946 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 250 [2021-11-19 14:23:51,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:51,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:52,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:52,109 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:52,144 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 292 [2021-11-19 14:23:52,150 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:52,172 INFO L185 QuantifierPusher]: treesize reduction 40, result has 50.6 percent of original size 41 [2021-11-19 14:23:52,173 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2021-11-19 14:23:52,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:52,610 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2021-11-19 14:23:53,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,197 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:53,226 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 208 [2021-11-19 14:23:53,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,328 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:53,351 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 292 [2021-11-19 14:23:53,368 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:53,399 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 208 [2021-11-19 14:23:53,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,873 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:53,888 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 217 [2021-11-19 14:23:53,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,910 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:53,915 INFO L185 QuantifierPusher]: treesize reduction 5, result has 93.2 percent of original size 68 [2021-11-19 14:23:53,921 INFO L180 QuantifierPusher]: treesize reduction 5, result has 95.5 percent of original size [2021-11-19 14:23:53,926 INFO L185 QuantifierPusher]: treesize reduction 5, result has 95.0 percent of original size 96 [2021-11-19 14:23:53,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:53,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:54,000 INFO L180 QuantifierPusher]: treesize reduction 6, result has 92.2 percent of original size [2021-11-19 14:23:54,004 INFO L185 QuantifierPusher]: treesize reduction 5, result has 92.4 percent of original size 61 [2021-11-19 14:23:54,010 INFO L180 QuantifierPusher]: treesize reduction 5, result has 95.2 percent of original size [2021-11-19 14:23:54,015 INFO L185 QuantifierPusher]: treesize reduction 5, result has 94.7 percent of original size 89 [2021-11-19 14:23:54,022 INFO L180 QuantifierPusher]: treesize reduction 5, result has 96.2 percent of original size [2021-11-19 14:23:54,030 INFO L185 QuantifierPusher]: treesize reduction 5, result has 95.9 percent of original size 117 [2021-11-19 14:23:54,068 INFO L180 QuantifierPusher]: treesize reduction 13, result has 96.2 percent of original size [2021-11-19 14:23:54,080 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:23:54,081 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:54,083 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-19 14:23:54,103 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 178 [2021-11-19 14:23:54,120 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:54,134 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 217 [2021-11-19 14:23:54,181 INFO L180 QuantifierPusher]: treesize reduction 13, result has 96.2 percent of original size [2021-11-19 14:23:54,186 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:23:54,187 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:54,189 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-19 14:23:54,211 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 178 [2021-11-19 14:23:54,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:54,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:54,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:54,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:54,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:54,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:54,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:54,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:54,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:54,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:54,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:54,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:54,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:54,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:54,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:54,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:54,484 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:54,499 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 202 [2021-11-19 14:23:54,504 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:54,516 INFO L185 QuantifierPusher]: treesize reduction 40, result has 50.6 percent of original size 41 [2021-11-19 14:23:54,517 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2021-11-19 14:23:54,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:54,749 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2021-11-19 14:23:55,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,137 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:55,151 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 178 [2021-11-19 14:23:55,171 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:55,191 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 202 [2021-11-19 14:23:55,206 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:55,220 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 178 [2021-11-19 14:23:55,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,363 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:55,373 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-19 14:23:55,386 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:55,395 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-11-19 14:23:55,408 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:55,419 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 243 [2021-11-19 14:23:55,429 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:55,438 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-11-19 14:23:55,449 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:55,460 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 243 [2021-11-19 14:23:55,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,557 INFO L180 QuantifierPusher]: treesize reduction 14, result has 93.0 percent of original size [2021-11-19 14:23:55,566 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-19 14:23:55,586 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:55,596 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 196 [2021-11-19 14:23:55,610 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:55,623 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 200 [2021-11-19 14:23:55,640 INFO L180 QuantifierPusher]: treesize reduction 6, result has 97.3 percent of original size [2021-11-19 14:23:55,653 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 199 [2021-11-19 14:23:55,672 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:55,688 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-11-19 14:23:55,692 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:55,696 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-19 14:23:55,706 INFO L180 QuantifierPusher]: treesize reduction 5, result has 96.4 percent of original size [2021-11-19 14:23:55,715 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:23:55,716 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:55,718 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-19 14:23:55,723 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-19 14:23:55,725 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:55,728 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-19 14:23:55,739 INFO L180 QuantifierPusher]: treesize reduction 5, result has 96.4 percent of original size [2021-11-19 14:23:55,746 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:23:55,747 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:55,749 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-19 14:23:55,758 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-19 14:23:55,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,779 INFO L180 QuantifierPusher]: treesize reduction 8, result has 96.4 percent of original size [2021-11-19 14:23:55,798 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 196 [2021-11-19 14:23:55,816 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:55,833 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-11-19 14:23:55,851 INFO L180 QuantifierPusher]: treesize reduction 8, result has 96.4 percent of original size [2021-11-19 14:23:55,860 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 196 [2021-11-19 14:23:55,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:55,967 INFO L180 QuantifierPusher]: treesize reduction 18, result has 92.2 percent of original size [2021-11-19 14:23:55,979 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 207 [2021-11-19 14:23:55,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:56,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:56,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:56,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:56,250 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:56,264 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 464 [2021-11-19 14:23:56,279 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:56,293 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 468 [2021-11-19 14:23:56,320 INFO L180 QuantifierPusher]: treesize reduction 4, result has 99.2 percent of original size [2021-11-19 14:23:56,346 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 476 [2021-11-19 14:23:56,364 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:56,388 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 459 [2021-11-19 14:23:56,412 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:56,417 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:23:56,427 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:56,442 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 353 [2021-11-19 14:23:56,472 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 444 [2021-11-19 14:23:56,488 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:56,504 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 535 [2021-11-19 14:23:56,520 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:56,524 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:23:56,535 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:56,549 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 353 [2021-11-19 14:23:56,575 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 444 [2021-11-19 14:23:56,591 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:56,606 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 535 [2021-11-19 14:23:56,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:56,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:56,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:56,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:56,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:56,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:56,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:56,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:56,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:56,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:56,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:56,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:56,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:56,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:56,801 INFO L180 QuantifierPusher]: treesize reduction 20, result has 91.2 percent of original size [2021-11-19 14:23:56,808 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 196 [2021-11-19 14:23:56,822 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:56,829 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 196 [2021-11-19 14:23:56,839 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:56,848 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 200 [2021-11-19 14:23:56,865 INFO L180 QuantifierPusher]: treesize reduction 6, result has 97.3 percent of original size [2021-11-19 14:23:56,873 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 199 [2021-11-19 14:23:56,887 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:56,900 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-11-19 14:23:56,911 INFO L180 QuantifierPusher]: treesize reduction 8, result has 96.4 percent of original size [2021-11-19 14:23:56,921 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 196 [2021-11-19 14:23:56,933 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:56,946 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-11-19 14:23:56,957 INFO L180 QuantifierPusher]: treesize reduction 8, result has 96.4 percent of original size [2021-11-19 14:23:56,966 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 196 [2021-11-19 14:23:56,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:56,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,141 INFO L180 QuantifierPusher]: treesize reduction 18, result has 92.2 percent of original size [2021-11-19 14:23:57,149 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 207 [2021-11-19 14:23:57,163 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:57,175 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-11-19 14:23:57,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,720 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:57,733 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 464 [2021-11-19 14:23:57,758 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:57,771 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 468 [2021-11-19 14:23:57,815 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:57,839 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 459 [2021-11-19 14:23:57,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:57,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,543 INFO L180 QuantifierPusher]: treesize reduction 6, result has 96.8 percent of original size [2021-11-19 14:23:58,549 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-11-19 14:23:58,558 INFO L180 QuantifierPusher]: treesize reduction 6, result has 97.7 percent of original size [2021-11-19 14:23:58,567 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 247 [2021-11-19 14:23:58,577 INFO L180 QuantifierPusher]: treesize reduction 6, result has 96.8 percent of original size [2021-11-19 14:23:58,583 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-11-19 14:23:58,592 INFO L180 QuantifierPusher]: treesize reduction 6, result has 97.7 percent of original size [2021-11-19 14:23:58,601 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 247 [2021-11-19 14:23:58,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,804 INFO L180 QuantifierPusher]: treesize reduction 14, result has 93.1 percent of original size [2021-11-19 14:23:58,810 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-11-19 14:23:58,818 INFO L180 QuantifierPusher]: treesize reduction 6, result has 96.8 percent of original size [2021-11-19 14:23:58,832 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-11-19 14:23:58,844 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:58,864 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 202 [2021-11-19 14:23:58,874 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:58,884 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 217 [2021-11-19 14:23:58,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:58,990 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:59,007 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 292 [2021-11-19 14:23:59,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:59,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:59,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:23:59,097 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:59,103 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 182 [2021-11-19 14:23:59,105 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 126 for LOIs [2021-11-19 14:23:59,124 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:23:59,143 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 332 [2021-11-19 14:23:59,146 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2021-11-19 14:24:00,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:24:00,155 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2021-11-19 14:24:02,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:24:07,643 WARN L227 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 1180 DAG size of output: 96 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-19 14:24:07,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:24:07,657 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 161 for LOIs [2021-11-19 14:24:07,682 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:24:07,706 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 422 [2021-11-19 14:24:07,710 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2021-11-19 14:24:08,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:24:08,923 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2021-11-19 14:24:10,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:24:10,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:24:10,250 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 123 for LOIs [2021-11-19 14:24:10,253 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 100 for LOIs [2021-11-19 14:24:10,256 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 115 for LOIs [2021-11-19 14:24:10,265 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:24:10,275 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-11-19 14:24:10,304 INFO L180 QuantifierPusher]: treesize reduction 13, result has 96.0 percent of original size [2021-11-19 14:24:10,312 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:24:10,313 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:24:10,315 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-19 14:24:10,331 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 174 [2021-11-19 14:24:10,342 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:24:10,350 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-11-19 14:24:10,381 INFO L180 QuantifierPusher]: treesize reduction 13, result has 96.0 percent of original size [2021-11-19 14:24:10,392 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-19 14:24:10,393 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:24:10,395 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-19 14:24:10,411 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 174 [2021-11-19 14:24:10,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:24:10,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:24:10,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:24:10,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:24:10,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:24:10,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:24:10,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:24:10,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:24:10,512 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:24:10,528 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-11-19 14:24:10,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:24:10,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:24:10,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:24:10,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:24:10,661 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 156 for LOIs [2021-11-19 14:24:10,710 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:24:10,742 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 659 [2021-11-19 14:24:10,805 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:24:10,844 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 694 [2021-11-19 14:24:10,901 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:24:10,944 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 729 [2021-11-19 14:24:10,998 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:24:11,041 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 764 [2021-11-19 14:24:11,096 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:24:11,145 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 799 [2021-11-19 14:24:11,149 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 14:24:48,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2069377873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:24:48,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:24:48,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [6, 7, 6] total 52 [2021-11-19 14:24:48,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873449292] [2021-11-19 14:24:48,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:24:48,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-19 14:24:48,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:24:48,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-19 14:24:48,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=2203, Unknown=0, NotChecked=0, Total=2652 [2021-11-19 14:24:48,142 INFO L87 Difference]: Start difference. First operand 8302 states and 12989 transitions. Second operand has 41 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 33 states have internal predecessors, (53), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:26:24,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:24,129 INFO L93 Difference]: Finished difference Result 15612 states and 23641 transitions. [2021-11-19 14:26:24,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-19 14:26:24,130 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 33 states have internal predecessors, (53), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 120 [2021-11-19 14:26:24,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:24,164 INFO L225 Difference]: With dead ends: 15612 [2021-11-19 14:26:24,164 INFO L226 Difference]: Without dead ends: 8933 [2021-11-19 14:26:24,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 299 SyntacticMatches, 17 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3596 ImplicationChecksByTransitivity, 83.1s TimeCoverageRelationStatistics Valid=1424, Invalid=8676, Unknown=0, NotChecked=0, Total=10100 [2021-11-19 14:26:24,186 INFO L933 BasicCegarLoop]: 3270 mSDtfsCounter, 572 mSDsluCounter, 1783 mSDsCounter, 0 mSdLazyCounter, 33053 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 4964 SdHoareTripleChecker+Invalid, 33287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 33053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:24,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 4964 Invalid, 33287 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [234 Valid, 33053 Invalid, 0 Unknown, 0 Unchecked, 49.0s Time] [2021-11-19 14:26:24,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8933 states. [2021-11-19 14:26:24,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8933 to 8466. [2021-11-19 14:26:24,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8466 states, 7429 states have (on average 1.6068111455108358) internal successors, (11937), 7445 states have internal predecessors, (11937), 615 states have call successors, (615), 420 states have call predecessors, (615), 420 states have return successors, (615), 601 states have call predecessors, (615), 615 states have call successors, (615) [2021-11-19 14:26:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8466 states to 8466 states and 13167 transitions. [2021-11-19 14:26:24,682 INFO L78 Accepts]: Start accepts. Automaton has 8466 states and 13167 transitions. Word has length 120 [2021-11-19 14:26:24,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:24,682 INFO L470 AbstractCegarLoop]: Abstraction has 8466 states and 13167 transitions. [2021-11-19 14:26:24,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 33 states have internal predecessors, (53), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 14:26:24,683 INFO L276 IsEmpty]: Start isEmpty. Operand 8466 states and 13167 transitions. [2021-11-19 14:26:24,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 14:26:24,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:24,712 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:26:24,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:24,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-19 14:26:24,927 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:24,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:24,928 INFO L85 PathProgramCache]: Analyzing trace with hash 95048522, now seen corresponding path program 1 times [2021-11-19 14:26:24,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:26:24,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079361441] [2021-11-19 14:26:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:24,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:26:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:26:25,087 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:26:25,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079361441] [2021-11-19 14:26:25,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079361441] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:25,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30317454] [2021-11-19 14:26:25,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:25,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:26:25,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:26:25,090 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:26:25,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 14:26:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:25,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:26:25,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:26:25,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 14:26:25,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30317454] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:25,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:26:25,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 8 [2021-11-19 14:26:25,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232966488] [2021-11-19 14:26:25,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:25,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:26:25,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:26:25,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:26:25,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:26:25,799 INFO L87 Difference]: Start difference. First operand 8466 states and 13167 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:26:26,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:26,622 INFO L93 Difference]: Finished difference Result 12660 states and 19461 transitions. [2021-11-19 14:26:26,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:26:26,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2021-11-19 14:26:26,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:26,656 INFO L225 Difference]: With dead ends: 12660 [2021-11-19 14:26:26,656 INFO L226 Difference]: Without dead ends: 8484 [2021-11-19 14:26:26,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:26:26,672 INFO L933 BasicCegarLoop]: 3236 mSDtfsCounter, 108 mSDsluCounter, 3396 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 6399 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:26,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 6399 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:26:26,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8484 states. [2021-11-19 14:26:27,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8484 to 8336. [2021-11-19 14:26:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8336 states, 7299 states have (on average 1.5932319495821345) internal successors, (11629), 7315 states have internal predecessors, (11629), 615 states have call successors, (615), 420 states have call predecessors, (615), 420 states have return successors, (615), 601 states have call predecessors, (615), 615 states have call successors, (615) [2021-11-19 14:26:27,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8336 states to 8336 states and 12859 transitions. [2021-11-19 14:26:27,164 INFO L78 Accepts]: Start accepts. Automaton has 8336 states and 12859 transitions. Word has length 121 [2021-11-19 14:26:27,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:27,164 INFO L470 AbstractCegarLoop]: Abstraction has 8336 states and 12859 transitions. [2021-11-19 14:26:27,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:26:27,165 INFO L276 IsEmpty]: Start isEmpty. Operand 8336 states and 12859 transitions. [2021-11-19 14:26:27,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 14:26:27,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:27,191 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:26:27,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:27,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:26:27,414 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:27,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:27,415 INFO L85 PathProgramCache]: Analyzing trace with hash 207404714, now seen corresponding path program 1 times [2021-11-19 14:26:27,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:26:27,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689115084] [2021-11-19 14:26:27,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:27,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:26:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:26:27,536 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:26:27,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689115084] [2021-11-19 14:26:27,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689115084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:27,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622287759] [2021-11-19 14:26:27,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:27,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:26:27,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:26:27,539 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:26:27,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 14:26:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:27,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:26:27,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:26:28,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 14:26:28,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622287759] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:26:28,316 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:26:28,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 8 [2021-11-19 14:26:28,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648944768] [2021-11-19 14:26:28,317 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:28,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:26:28,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:26:28,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:26:28,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:26:28,319 INFO L87 Difference]: Start difference. First operand 8336 states and 12859 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:26:29,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:29,217 INFO L93 Difference]: Finished difference Result 12476 states and 18793 transitions. [2021-11-19 14:26:29,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:26:29,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 121 [2021-11-19 14:26:29,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:29,251 INFO L225 Difference]: With dead ends: 12476 [2021-11-19 14:26:29,251 INFO L226 Difference]: Without dead ends: 8972 [2021-11-19 14:26:29,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:26:29,267 INFO L933 BasicCegarLoop]: 3197 mSDtfsCounter, 3410 mSDsluCounter, 3394 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3410 SdHoareTripleChecker+Valid, 6355 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:29,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3410 Valid, 6355 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:26:29,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8972 states. [2021-11-19 14:26:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8972 to 8972. [2021-11-19 14:26:29,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8972 states, 7851 states have (on average 1.5650235638772132) internal successors, (12287), 7867 states have internal predecessors, (12287), 643 states have call successors, (643), 476 states have call predecessors, (643), 476 states have return successors, (643), 629 states have call predecessors, (643), 643 states have call successors, (643) [2021-11-19 14:26:29,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8972 states to 8972 states and 13573 transitions. [2021-11-19 14:26:29,781 INFO L78 Accepts]: Start accepts. Automaton has 8972 states and 13573 transitions. Word has length 121 [2021-11-19 14:26:29,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:29,782 INFO L470 AbstractCegarLoop]: Abstraction has 8972 states and 13573 transitions. [2021-11-19 14:26:29,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:26:29,782 INFO L276 IsEmpty]: Start isEmpty. Operand 8972 states and 13573 transitions. [2021-11-19 14:26:29,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-19 14:26:29,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:29,811 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:26:29,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:30,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:26:30,032 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:30,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:30,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2073228553, now seen corresponding path program 1 times [2021-11-19 14:26:30,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:26:30,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792908228] [2021-11-19 14:26:30,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:30,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:26:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:26:30,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:26:30,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792908228] [2021-11-19 14:26:30,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792908228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:30,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505675884] [2021-11-19 14:26:30,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:30,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:26:30,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:26:30,121 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:26:30,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 14:26:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:30,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:26:30,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:26:30,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 14:26:31,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505675884] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:31,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:26:31,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 5] total 11 [2021-11-19 14:26:31,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706434937] [2021-11-19 14:26:31,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:31,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:26:31,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:26:31,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:26:31,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:26:31,130 INFO L87 Difference]: Start difference. First operand 8972 states and 13573 transitions. Second operand has 6 states, 5 states have (on average 16.0) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:26:32,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:32,457 INFO L93 Difference]: Finished difference Result 18903 states and 27468 transitions. [2021-11-19 14:26:32,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:26:32,458 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 122 [2021-11-19 14:26:32,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:32,500 INFO L225 Difference]: With dead ends: 18903 [2021-11-19 14:26:32,500 INFO L226 Difference]: Without dead ends: 11631 [2021-11-19 14:26:32,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:26:32,522 INFO L933 BasicCegarLoop]: 3175 mSDtfsCounter, 6970 mSDsluCounter, 6698 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6983 SdHoareTripleChecker+Valid, 9421 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:32,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6983 Valid, 9421 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:26:32,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11631 states. [2021-11-19 14:26:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11631 to 11629. [2021-11-19 14:26:33,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11629 states, 10054 states have (on average 1.5173065446588423) internal successors, (15255), 10078 states have internal predecessors, (15255), 906 states have call successors, (906), 667 states have call predecessors, (906), 667 states have return successors, (906), 884 states have call predecessors, (906), 906 states have call successors, (906) [2021-11-19 14:26:33,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11629 states to 11629 states and 17067 transitions. [2021-11-19 14:26:33,224 INFO L78 Accepts]: Start accepts. Automaton has 11629 states and 17067 transitions. Word has length 122 [2021-11-19 14:26:33,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:33,225 INFO L470 AbstractCegarLoop]: Abstraction has 11629 states and 17067 transitions. [2021-11-19 14:26:33,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:26:33,225 INFO L276 IsEmpty]: Start isEmpty. Operand 11629 states and 17067 transitions. [2021-11-19 14:26:33,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 14:26:33,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:33,269 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:26:33,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:33,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-11-19 14:26:33,483 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:33,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:33,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1719678772, now seen corresponding path program 1 times [2021-11-19 14:26:33,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:26:33,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924756521] [2021-11-19 14:26:33,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:33,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:26:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 14:26:33,583 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:26:33,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924756521] [2021-11-19 14:26:33,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924756521] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:33,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889162673] [2021-11-19 14:26:33,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:33,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:26:33,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:26:33,585 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:26:33,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 14:26:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:33,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:26:33,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:26:34,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:34,369 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-19 14:26:34,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889162673] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:34,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:26:34,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 8 [2021-11-19 14:26:34,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859683330] [2021-11-19 14:26:34,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:34,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:26:34,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:26:34,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:26:34,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:26:34,372 INFO L87 Difference]: Start difference. First operand 11629 states and 17067 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:26:35,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:35,368 INFO L93 Difference]: Finished difference Result 18756 states and 27275 transitions. [2021-11-19 14:26:35,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:26:35,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 125 [2021-11-19 14:26:35,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:35,407 INFO L225 Difference]: With dead ends: 18756 [2021-11-19 14:26:35,407 INFO L226 Difference]: Without dead ends: 11647 [2021-11-19 14:26:35,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:26:35,431 INFO L933 BasicCegarLoop]: 3261 mSDtfsCounter, 101 mSDsluCounter, 3394 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 6422 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:35,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 6422 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:26:35,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11647 states. [2021-11-19 14:26:36,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11647 to 11499. [2021-11-19 14:26:36,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11499 states, 9924 states have (on average 1.5013099556630392) internal successors, (14899), 9948 states have internal predecessors, (14899), 906 states have call successors, (906), 667 states have call predecessors, (906), 667 states have return successors, (906), 884 states have call predecessors, (906), 906 states have call successors, (906) [2021-11-19 14:26:36,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11499 states to 11499 states and 16711 transitions. [2021-11-19 14:26:36,146 INFO L78 Accepts]: Start accepts. Automaton has 11499 states and 16711 transitions. Word has length 125 [2021-11-19 14:26:36,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:36,147 INFO L470 AbstractCegarLoop]: Abstraction has 11499 states and 16711 transitions. [2021-11-19 14:26:36,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:26:36,148 INFO L276 IsEmpty]: Start isEmpty. Operand 11499 states and 16711 transitions. [2021-11-19 14:26:36,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 14:26:36,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:36,167 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2021-11-19 14:26:36,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:36,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-11-19 14:26:36,391 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:36,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:36,392 INFO L85 PathProgramCache]: Analyzing trace with hash -280171348, now seen corresponding path program 1 times [2021-11-19 14:26:36,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:26:36,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384297600] [2021-11-19 14:26:36,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:36,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:26:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 14:26:36,483 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:26:36,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384297600] [2021-11-19 14:26:36,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384297600] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:36,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083447799] [2021-11-19 14:26:36,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:36,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:26:36,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:26:36,486 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:26:36,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 14:26:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:36,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:26:36,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:26:36,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:37,347 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 14:26:37,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083447799] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:37,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:26:37,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-11-19 14:26:37,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962325260] [2021-11-19 14:26:37,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:37,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:26:37,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:26:37,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:26:37,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:26:37,352 INFO L87 Difference]: Start difference. First operand 11499 states and 16711 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:26:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:38,820 INFO L93 Difference]: Finished difference Result 29057 states and 40451 transitions. [2021-11-19 14:26:38,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:26:38,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 125 [2021-11-19 14:26:38,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:38,902 INFO L225 Difference]: With dead ends: 29057 [2021-11-19 14:26:38,902 INFO L226 Difference]: Without dead ends: 19258 [2021-11-19 14:26:38,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:26:38,930 INFO L933 BasicCegarLoop]: 3254 mSDtfsCounter, 3399 mSDsluCounter, 3619 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3399 SdHoareTripleChecker+Valid, 6611 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:38,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3399 Valid, 6611 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:26:38,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19258 states. [2021-11-19 14:26:40,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19258 to 19231. [2021-11-19 14:26:40,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19231 states, 16311 states have (on average 1.4358408436024768) internal successors, (23420), 16381 states have internal predecessors, (23420), 1672 states have call successors, (1672), 1222 states have call predecessors, (1672), 1246 states have return successors, (1744), 1628 states have call predecessors, (1744), 1672 states have call successors, (1744) [2021-11-19 14:26:40,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19231 states to 19231 states and 26836 transitions. [2021-11-19 14:26:40,319 INFO L78 Accepts]: Start accepts. Automaton has 19231 states and 26836 transitions. Word has length 125 [2021-11-19 14:26:40,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:40,320 INFO L470 AbstractCegarLoop]: Abstraction has 19231 states and 26836 transitions. [2021-11-19 14:26:40,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:26:40,320 INFO L276 IsEmpty]: Start isEmpty. Operand 19231 states and 26836 transitions. [2021-11-19 14:26:40,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 14:26:40,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:40,345 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:26:40,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:40,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:26:40,571 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:40,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:40,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1778526565, now seen corresponding path program 1 times [2021-11-19 14:26:40,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:26:40,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867674638] [2021-11-19 14:26:40,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:40,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:26:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 14:26:40,673 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:26:40,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867674638] [2021-11-19 14:26:40,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867674638] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:40,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762818662] [2021-11-19 14:26:40,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:40,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:26:40,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:26:40,679 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:26:40,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 14:26:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:40,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:26:40,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:26:41,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 14:26:41,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762818662] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:41,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:26:41,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 8 [2021-11-19 14:26:41,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262577246] [2021-11-19 14:26:41,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:41,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:26:41,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:26:41,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:26:41,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:26:41,452 INFO L87 Difference]: Start difference. First operand 19231 states and 26836 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:26:42,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:42,680 INFO L93 Difference]: Finished difference Result 23579 states and 32835 transitions. [2021-11-19 14:26:42,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:26:42,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 126 [2021-11-19 14:26:42,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:42,728 INFO L225 Difference]: With dead ends: 23579 [2021-11-19 14:26:42,729 INFO L226 Difference]: Without dead ends: 17903 [2021-11-19 14:26:42,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:26:42,741 INFO L933 BasicCegarLoop]: 3185 mSDtfsCounter, 28 mSDsluCounter, 3397 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 6351 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:42,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 6351 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:26:42,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17903 states. [2021-11-19 14:26:43,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17903 to 17627. [2021-11-19 14:26:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17627 states, 14899 states have (on average 1.445801731659843) internal successors, (21541), 14933 states have internal predecessors, (21541), 1588 states have call successors, (1588), 1138 states have call predecessors, (1588), 1138 states have return successors, (1588), 1556 states have call predecessors, (1588), 1588 states have call successors, (1588) [2021-11-19 14:26:43,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17627 states to 17627 states and 24717 transitions. [2021-11-19 14:26:43,718 INFO L78 Accepts]: Start accepts. Automaton has 17627 states and 24717 transitions. Word has length 126 [2021-11-19 14:26:43,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:43,718 INFO L470 AbstractCegarLoop]: Abstraction has 17627 states and 24717 transitions. [2021-11-19 14:26:43,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:26:43,718 INFO L276 IsEmpty]: Start isEmpty. Operand 17627 states and 24717 transitions. [2021-11-19 14:26:43,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 14:26:43,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:43,740 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2021-11-19 14:26:43,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:43,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-11-19 14:26:43,955 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:43,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:43,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1234247990, now seen corresponding path program 1 times [2021-11-19 14:26:43,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:26:43,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56197971] [2021-11-19 14:26:43,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:43,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:26:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 14:26:44,086 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:26:44,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56197971] [2021-11-19 14:26:44,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56197971] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:44,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271254364] [2021-11-19 14:26:44,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:44,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:26:44,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:26:44,088 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:26:44,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 14:26:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:44,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:26:44,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:44,565 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:26:44,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:26:44,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271254364] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:44,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:26:44,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 6] total 10 [2021-11-19 14:26:44,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594601845] [2021-11-19 14:26:44,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:44,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:26:44,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:26:44,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:26:44,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:26:44,892 INFO L87 Difference]: Start difference. First operand 17627 states and 24717 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:26:46,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:46,174 INFO L93 Difference]: Finished difference Result 30343 states and 41900 transitions. [2021-11-19 14:26:46,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:26:46,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 128 [2021-11-19 14:26:46,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:46,230 INFO L225 Difference]: With dead ends: 30343 [2021-11-19 14:26:46,230 INFO L226 Difference]: Without dead ends: 19765 [2021-11-19 14:26:46,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:26:46,256 INFO L933 BasicCegarLoop]: 3192 mSDtfsCounter, 3356 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3356 SdHoareTripleChecker+Valid, 3228 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:46,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3356 Valid, 3228 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:26:46,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19765 states. [2021-11-19 14:26:47,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19765 to 19593. [2021-11-19 14:26:47,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19593 states, 16695 states have (on average 1.4093441150044923) internal successors, (23529), 16729 states have internal predecessors, (23529), 1624 states have call successors, (1624), 1272 states have call predecessors, (1624), 1272 states have return successors, (1746), 1592 states have call predecessors, (1746), 1624 states have call successors, (1746) [2021-11-19 14:26:47,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19593 states to 19593 states and 26899 transitions. [2021-11-19 14:26:47,532 INFO L78 Accepts]: Start accepts. Automaton has 19593 states and 26899 transitions. Word has length 128 [2021-11-19 14:26:47,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:47,532 INFO L470 AbstractCegarLoop]: Abstraction has 19593 states and 26899 transitions. [2021-11-19 14:26:47,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:26:47,532 INFO L276 IsEmpty]: Start isEmpty. Operand 19593 states and 26899 transitions. [2021-11-19 14:26:47,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 14:26:47,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:47,561 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2021-11-19 14:26:47,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:47,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-11-19 14:26:47,778 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:47,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:47,779 INFO L85 PathProgramCache]: Analyzing trace with hash -361957372, now seen corresponding path program 1 times [2021-11-19 14:26:47,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:26:47,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980370343] [2021-11-19 14:26:47,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:47,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:26:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 14:26:47,936 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:26:47,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980370343] [2021-11-19 14:26:47,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980370343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:47,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783210756] [2021-11-19 14:26:47,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:47,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:26:47,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:26:47,938 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:26:47,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 14:26:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:48,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 14:26:48,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:26:48,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 44 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:26:48,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783210756] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:48,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:26:48,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 5] total 13 [2021-11-19 14:26:48,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983056819] [2021-11-19 14:26:48,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:48,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:26:48,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:26:48,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:26:48,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:26:48,860 INFO L87 Difference]: Start difference. First operand 19593 states and 26899 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-19 14:26:50,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:50,721 INFO L93 Difference]: Finished difference Result 36415 states and 49298 transitions. [2021-11-19 14:26:50,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:26:50,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 130 [2021-11-19 14:26:50,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:50,805 INFO L225 Difference]: With dead ends: 36415 [2021-11-19 14:26:50,805 INFO L226 Difference]: Without dead ends: 24543 [2021-11-19 14:26:50,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:26:50,836 INFO L933 BasicCegarLoop]: 3251 mSDtfsCounter, 222 mSDsluCounter, 10083 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 12651 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:50,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 12651 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:26:50,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24543 states. [2021-11-19 14:26:52,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24543 to 22789. [2021-11-19 14:26:52,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22789 states, 19277 states have (on average 1.383150905223842) internal successors, (26663), 19291 states have internal predecessors, (26663), 2004 states have call successors, (2004), 1548 states have call predecessors, (2004), 1506 states have return successors, (2190), 1950 states have call predecessors, (2190), 2004 states have call successors, (2190) [2021-11-19 14:26:52,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22789 states to 22789 states and 30857 transitions. [2021-11-19 14:26:52,398 INFO L78 Accepts]: Start accepts. Automaton has 22789 states and 30857 transitions. Word has length 130 [2021-11-19 14:26:52,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:52,399 INFO L470 AbstractCegarLoop]: Abstraction has 22789 states and 30857 transitions. [2021-11-19 14:26:52,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-19 14:26:52,400 INFO L276 IsEmpty]: Start isEmpty. Operand 22789 states and 30857 transitions. [2021-11-19 14:26:52,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 14:26:52,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:52,429 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:26:52,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:52,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:26:52,655 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:52,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:52,656 INFO L85 PathProgramCache]: Analyzing trace with hash 794101891, now seen corresponding path program 1 times [2021-11-19 14:26:52,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:26:52,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725265266] [2021-11-19 14:26:52,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:52,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:26:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:26:52,752 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:26:52,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725265266] [2021-11-19 14:26:52,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725265266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:52,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930458912] [2021-11-19 14:26:52,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:52,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:26:52,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:26:52,754 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:26:52,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 14:26:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:52,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:26:52,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 14:26:53,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:53,593 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:26:53,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930458912] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:53,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:26:53,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 5] total 8 [2021-11-19 14:26:53,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440054851] [2021-11-19 14:26:53,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:53,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:26:53,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:26:53,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:26:53,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:26:53,595 INFO L87 Difference]: Start difference. First operand 22789 states and 30857 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:26:56,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:56,036 INFO L93 Difference]: Finished difference Result 52326 states and 69188 transitions. [2021-11-19 14:26:56,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:26:56,037 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 124 [2021-11-19 14:26:56,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:56,147 INFO L225 Difference]: With dead ends: 52326 [2021-11-19 14:26:56,147 INFO L226 Difference]: Without dead ends: 31282 [2021-11-19 14:26:56,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:26:56,182 INFO L933 BasicCegarLoop]: 3181 mSDtfsCounter, 3596 mSDsluCounter, 6785 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3609 SdHoareTripleChecker+Valid, 9496 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:56,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3609 Valid, 9496 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:26:56,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31282 states. [2021-11-19 14:26:58,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31282 to 31268. [2021-11-19 14:26:58,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31268 states, 26262 states have (on average 1.3459751732541314) internal successors, (35348), 26282 states have internal predecessors, (35348), 2856 states have call successors, (2856), 2208 states have call predecessors, (2856), 2148 states have return successors, (3132), 2778 states have call predecessors, (3132), 2856 states have call successors, (3132) [2021-11-19 14:26:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31268 states to 31268 states and 41336 transitions. [2021-11-19 14:26:58,268 INFO L78 Accepts]: Start accepts. Automaton has 31268 states and 41336 transitions. Word has length 124 [2021-11-19 14:26:58,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:58,270 INFO L470 AbstractCegarLoop]: Abstraction has 31268 states and 41336 transitions. [2021-11-19 14:26:58,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:26:58,270 INFO L276 IsEmpty]: Start isEmpty. Operand 31268 states and 41336 transitions. [2021-11-19 14:26:58,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 14:26:58,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:58,292 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:26:58,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:58,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:26:58,493 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:58,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:58,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1248901523, now seen corresponding path program 1 times [2021-11-19 14:26:58,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:26:58,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670000621] [2021-11-19 14:26:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:58,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:26:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:26:58,570 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:26:58,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670000621] [2021-11-19 14:26:58,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670000621] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:58,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135722466] [2021-11-19 14:26:58,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:58,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:26:58,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:26:58,583 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:26:58,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 14:26:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:58,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:26:58,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:26:58,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 14:26:59,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135722466] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:59,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:26:59,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 8 [2021-11-19 14:26:59,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269022343] [2021-11-19 14:26:59,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:59,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:26:59,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:26:59,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:26:59,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:26:59,321 INFO L87 Difference]: Start difference. First operand 31268 states and 41336 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:27:01,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:01,204 INFO L93 Difference]: Finished difference Result 51535 states and 68699 transitions. [2021-11-19 14:27:01,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:27:01,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 128 [2021-11-19 14:27:01,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:01,317 INFO L225 Difference]: With dead ends: 51535 [2021-11-19 14:27:01,317 INFO L226 Difference]: Without dead ends: 30713 [2021-11-19 14:27:01,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:27:01,366 INFO L933 BasicCegarLoop]: 3255 mSDtfsCounter, 103 mSDsluCounter, 3393 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 6415 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:01,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 6415 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:27:01,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30713 states. [2021-11-19 14:27:03,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30713 to 30449. [2021-11-19 14:27:03,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30449 states, 25555 states have (on average 1.3261201330463706) internal successors, (33889), 25575 states have internal predecessors, (33889), 2794 states have call successors, (2794), 2158 states have call predecessors, (2794), 2098 states have return successors, (3070), 2716 states have call predecessors, (3070), 2794 states have call successors, (3070) [2021-11-19 14:27:03,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30449 states to 30449 states and 39753 transitions. [2021-11-19 14:27:03,773 INFO L78 Accepts]: Start accepts. Automaton has 30449 states and 39753 transitions. Word has length 128 [2021-11-19 14:27:03,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:03,774 INFO L470 AbstractCegarLoop]: Abstraction has 30449 states and 39753 transitions. [2021-11-19 14:27:03,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:27:03,775 INFO L276 IsEmpty]: Start isEmpty. Operand 30449 states and 39753 transitions. [2021-11-19 14:27:03,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 14:27:03,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:03,798 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:27:03,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:04,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:27:04,008 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:04,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:04,009 INFO L85 PathProgramCache]: Analyzing trace with hash 123539081, now seen corresponding path program 1 times [2021-11-19 14:27:04,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:27:04,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169760271] [2021-11-19 14:27:04,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:04,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:27:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:27:04,081 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:27:04,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169760271] [2021-11-19 14:27:04,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169760271] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:27:04,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471735123] [2021-11-19 14:27:04,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:04,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:27:04,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:27:04,084 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:27:04,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-19 14:27:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:04,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:27:04,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:27:04,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:04,907 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:27:04,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471735123] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:27:04,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:27:04,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 5] total 8 [2021-11-19 14:27:04,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793618124] [2021-11-19 14:27:04,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:04,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:27:04,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:27:04,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:27:04,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:27:04,909 INFO L87 Difference]: Start difference. First operand 30449 states and 39753 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:27:08,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:08,372 INFO L93 Difference]: Finished difference Result 71213 states and 91063 transitions. [2021-11-19 14:27:08,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:27:08,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2021-11-19 14:27:08,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:08,474 INFO L225 Difference]: With dead ends: 71213 [2021-11-19 14:27:08,474 INFO L226 Difference]: Without dead ends: 42509 [2021-11-19 14:27:08,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:27:08,509 INFO L933 BasicCegarLoop]: 3172 mSDtfsCounter, 3604 mSDsluCounter, 6771 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3617 SdHoareTripleChecker+Valid, 9476 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:08,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3617 Valid, 9476 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:27:08,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42509 states. [2021-11-19 14:27:11,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42509 to 42507. [2021-11-19 14:27:11,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42507 states, 35501 states have (on average 1.2917100926734457) internal successors, (45857), 35533 states have internal predecessors, (45857), 3998 states have call successors, (3998), 3090 states have call predecessors, (3998), 3006 states have return successors, (4346), 3884 states have call predecessors, (4346), 3998 states have call successors, (4346) [2021-11-19 14:27:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42507 states to 42507 states and 54201 transitions. [2021-11-19 14:27:11,361 INFO L78 Accepts]: Start accepts. Automaton has 42507 states and 54201 transitions. Word has length 126 [2021-11-19 14:27:11,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:11,362 INFO L470 AbstractCegarLoop]: Abstraction has 42507 states and 54201 transitions. [2021-11-19 14:27:11,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:27:11,362 INFO L276 IsEmpty]: Start isEmpty. Operand 42507 states and 54201 transitions. [2021-11-19 14:27:11,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 14:27:11,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:11,420 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:27:11,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:11,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23bc60b6-bed2-4cce-9d07-fdfdb871d7bd/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable262 [2021-11-19 14:27:11,635 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:11,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:11,636 INFO L85 PathProgramCache]: Analyzing trace with hash -990289165, now seen corresponding path program 1 times [2021-11-19 14:27:11,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:27:11,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672195894] [2021-11-19 14:27:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:11,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:27:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 14:27:11,749 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:27:11,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672195894] [2021-11-19 14:27:11,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672195894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:27:11,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:27:11,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:27:11,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030943696] [2021-11-19 14:27:11,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:11,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:27:11,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:27:11,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:27:11,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:27:11,754 INFO L87 Difference]: Start difference. First operand 42507 states and 54201 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:27:15,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:15,217 INFO L93 Difference]: Finished difference Result 70721 states and 89772 transitions. [2021-11-19 14:27:15,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:27:15,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 127 [2021-11-19 14:27:15,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:15,474 INFO L225 Difference]: With dead ends: 70721 [2021-11-19 14:27:15,474 INFO L226 Difference]: Without dead ends: 48109 [2021-11-19 14:27:15,512 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 [2021-11-19 14:27:15,513 INFO L933 BasicCegarLoop]: 3217 mSDtfsCounter, 3387 mSDsluCounter, 3455 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3387 SdHoareTripleChecker+Valid, 6426 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:15,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3387 Valid, 6426 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:27:15,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48109 states. [2021-11-19 14:27:18,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48109 to 47239. [2021-11-19 14:27:18,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47239 states, 39897 states have (on average 1.2700954959019475) internal successors, (50673), 40013 states have internal predecessors, (50673), 4034 states have call successors, (4034), 3294 states have call predecessors, (4034), 3306 states have return successors, (4466), 3932 states have call predecessors, (4466), 4034 states have call successors, (4466) [2021-11-19 14:27:18,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47239 states to 47239 states and 59173 transitions. [2021-11-19 14:27:18,775 INFO L78 Accepts]: Start accepts. Automaton has 47239 states and 59173 transitions. Word has length 127 [2021-11-19 14:27:18,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:18,776 INFO L470 AbstractCegarLoop]: Abstraction has 47239 states and 59173 transitions. [2021-11-19 14:27:18,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:27:18,776 INFO L276 IsEmpty]: Start isEmpty. Operand 47239 states and 59173 transitions. [2021-11-19 14:27:18,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 14:27:18,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:18,811 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:27:18,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263 [2021-11-19 14:27:18,812 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:18,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:18,812 INFO L85 PathProgramCache]: Analyzing trace with hash 223404587, now seen corresponding path program 1 times [2021-11-19 14:27:18,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:27:18,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659679075] [2021-11-19 14:27:18,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:18,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:27:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 14:27:18,895 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:27:18,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659679075] [2021-11-19 14:27:18,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659679075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:27:18,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:27:18,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 14:27:18,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28308893] [2021-11-19 14:27:18,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:18,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:27:18,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:27:18,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:27:18,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:27:18,898 INFO L87 Difference]: Start difference. First operand 47239 states and 59173 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10)