./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98a5938-2a26-4532-8ad7-6ad8b4ef5e2c/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98a5938-2a26-4532-8ad7-6ad8b4ef5e2c/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98a5938-2a26-4532-8ad7-6ad8b4ef5e2c/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98a5938-2a26-4532-8ad7-6ad8b4ef5e2c/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98a5938-2a26-4532-8ad7-6ad8b4ef5e2c/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98a5938-2a26-4532-8ad7-6ad8b4ef5e2c/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 66c207afdf75651c63b981596e8f017960ef7c36414078ce8f63e7be229e927f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:39:58,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:39:58,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:39:58,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:39:58,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:39:58,952 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:39:58,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:39:58,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:39:58,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:39:58,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:39:58,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:39:58,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:39:58,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:39:58,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:39:58,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:39:58,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:39:58,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:39:58,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:39:58,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:39:58,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:39:58,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:39:59,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:39:59,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:39:59,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:39:59,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:39:59,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:39:59,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:39:59,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:39:59,019 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:39:59,021 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:39:59,021 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:39:59,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:39:59,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:39:59,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:39:59,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:39:59,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:39:59,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:39:59,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:39:59,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:39:59,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:39:59,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:39:59,034 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98a5938-2a26-4532-8ad7-6ad8b4ef5e2c/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:39:59,083 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:39:59,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:39:59,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:39:59,085 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:39:59,086 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:39:59,086 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:39:59,086 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:39:59,087 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:39:59,093 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:39:59,094 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:39:59,095 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:39:59,095 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:39:59,096 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:39:59,096 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:39:59,096 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:39:59,097 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:39:59,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:39:59,098 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:39:59,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:39:59,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:39:59,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:39:59,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:39:59,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:39:59,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:39:59,100 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:39:59,100 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:39:59,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:39:59,101 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:39:59,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:39:59,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:39:59,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:39:59,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:39:59,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:39:59,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:39:59,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:39:59,105 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:39:59,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:39:59,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:39:59,106 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:39:59,106 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:39:59,107 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_a98a5938-2a26-4532-8ad7-6ad8b4ef5e2c/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98a5938-2a26-4532-8ad7-6ad8b4ef5e2c/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66c207afdf75651c63b981596e8f017960ef7c36414078ce8f63e7be229e927f [2021-11-12 22:39:59,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:39:59,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:39:59,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:39:59,517 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:39:59,518 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:39:59,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98a5938-2a26-4532-8ad7-6ad8b4ef5e2c/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-12 22:39:59,599 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98a5938-2a26-4532-8ad7-6ad8b4ef5e2c/bin/utaipan-vmNK8stdcF/data/8a2ba2726/ba2e1339de224a50b1a48a50d57cc246/FLAG7040172e4 [2021-11-12 22:40:00,418 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:40:00,419 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98a5938-2a26-4532-8ad7-6ad8b4ef5e2c/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-12 22:40:00,446 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98a5938-2a26-4532-8ad7-6ad8b4ef5e2c/bin/utaipan-vmNK8stdcF/data/8a2ba2726/ba2e1339de224a50b1a48a50d57cc246/FLAG7040172e4 [2021-11-12 22:40:00,594 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98a5938-2a26-4532-8ad7-6ad8b4ef5e2c/bin/utaipan-vmNK8stdcF/data/8a2ba2726/ba2e1339de224a50b1a48a50d57cc246 [2021-11-12 22:40:00,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:40:00,599 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:40:00,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:40:00,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:40:00,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:40:00,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:40:00" (1/1) ... [2021-11-12 22:40:00,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2806015d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:00, skipping insertion in model container [2021-11-12 22:40:00,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:40:00" (1/1) ... [2021-11-12 22:40:00,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:40:00,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:40:01,281 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98a5938-2a26-4532-8ad7-6ad8b4ef5e2c/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[26611,26624] [2021-11-12 22:40:01,346 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98a5938-2a26-4532-8ad7-6ad8b4ef5e2c/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[30833,30846] [2021-11-12 22:40:01,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:40:01,593 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:40:01,814 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98a5938-2a26-4532-8ad7-6ad8b4ef5e2c/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[26611,26624] [2021-11-12 22:40:01,861 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98a5938-2a26-4532-8ad7-6ad8b4ef5e2c/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[30833,30846] [2021-11-12 22:40:01,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:40:02,012 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:40:02,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:02 WrapperNode [2021-11-12 22:40:02,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:40:02,014 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:40:02,014 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:40:02,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:40:02,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:02" (1/1) ... [2021-11-12 22:40:02,074 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:02" (1/1) ... [2021-11-12 22:40:02,171 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:40:02,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:40:02,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:40:02,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:40:02,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:02" (1/1) ... [2021-11-12 22:40:02,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:02" (1/1) ... [2021-11-12 22:40:02,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:02" (1/1) ... [2021-11-12 22:40:02,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:02" (1/1) ... [2021-11-12 22:40:02,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:02" (1/1) ... [2021-11-12 22:40:02,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:02" (1/1) ... [2021-11-12 22:40:02,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:02" (1/1) ... [2021-11-12 22:40:02,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:40:02,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:40:02,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:40:02,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:40:02,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:02" (1/1) ... [2021-11-12 22:40:02,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:40:02,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98a5938-2a26-4532-8ad7-6ad8b4ef5e2c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:40:02,362 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98a5938-2a26-4532-8ad7-6ad8b4ef5e2c/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:40:02,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98a5938-2a26-4532-8ad7-6ad8b4ef5e2c/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:40:02,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:40:02,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:40:02,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:40:02,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:40:05,502 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:40:05,502 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 22:40:05,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:40:05 BoogieIcfgContainer [2021-11-12 22:40:05,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:40:05,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:40:05,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:40:05,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:40:05,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:40:00" (1/3) ... [2021-11-12 22:40:05,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c1ea291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:40:05, skipping insertion in model container [2021-11-12 22:40:05,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:40:02" (2/3) ... [2021-11-12 22:40:05,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c1ea291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:40:05, skipping insertion in model container [2021-11-12 22:40:05,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:40:05" (3/3) ... [2021-11-12 22:40:05,519 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-11-12 22:40:05,524 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:40:05,525 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 22:40:05,600 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:40:05,616 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:40:05,617 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 22:40:05,658 INFO L276 IsEmpty]: Start isEmpty. Operand has 533 states, 530 states have (on average 1.7339622641509433) internal successors, (919), 532 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:05,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-12 22:40:05,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:05,707 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:05,708 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:05,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:05,714 INFO L85 PathProgramCache]: Analyzing trace with hash -186790397, now seen corresponding path program 1 times [2021-11-12 22:40:05,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:05,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129258770] [2021-11-12 22:40:05,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:05,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:07,137 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:07,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129258770] [2021-11-12 22:40:07,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129258770] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:07,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:07,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:40:07,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768949535] [2021-11-12 22:40:07,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:07,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:40:07,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:07,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:40:07,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:40:07,190 INFO L87 Difference]: Start difference. First operand has 533 states, 530 states have (on average 1.7339622641509433) internal successors, (919), 532 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:07,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:07,747 INFO L93 Difference]: Finished difference Result 1568 states and 2706 transitions. [2021-11-12 22:40:07,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:40:07,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2021-11-12 22:40:07,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:07,783 INFO L225 Difference]: With dead ends: 1568 [2021-11-12 22:40:07,784 INFO L226 Difference]: Without dead ends: 1040 [2021-11-12 22:40:07,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:40:07,801 INFO L933 BasicCegarLoop]: 1236 mSDtfsCounter, 2197 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 243.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2197 SdHoareTripleChecker+Valid, 2063 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.59ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 301.86ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:07,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2197 Valid, 2063 Invalid, 144 Unknown, 0 Unchecked, 34.59ms Time], IncrementalHoareTripleChecker [17 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 301.86ms Time] [2021-11-12 22:40:07,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-11-12 22:40:07,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 1019. [2021-11-12 22:40:07,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1017 states have (on average 1.4434611602753196) internal successors, (1468), 1018 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:07,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1468 transitions. [2021-11-12 22:40:07,975 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1468 transitions. Word has length 214 [2021-11-12 22:40:07,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:07,978 INFO L470 AbstractCegarLoop]: Abstraction has 1019 states and 1468 transitions. [2021-11-12 22:40:07,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:07,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1468 transitions. [2021-11-12 22:40:07,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-12 22:40:07,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:07,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:07,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:40:07,991 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:07,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:07,995 INFO L85 PathProgramCache]: Analyzing trace with hash -794254637, now seen corresponding path program 1 times [2021-11-12 22:40:07,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:07,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277459066] [2021-11-12 22:40:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:07,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:08,287 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:08,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277459066] [2021-11-12 22:40:08,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277459066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:08,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:08,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:40:08,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537692582] [2021-11-12 22:40:08,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:08,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:40:08,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:08,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:40:08,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:40:08,298 INFO L87 Difference]: Start difference. First operand 1019 states and 1468 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:08,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:08,663 INFO L93 Difference]: Finished difference Result 2898 states and 4154 transitions. [2021-11-12 22:40:08,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:40:08,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2021-11-12 22:40:08,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:08,678 INFO L225 Difference]: With dead ends: 2898 [2021-11-12 22:40:08,679 INFO L226 Difference]: Without dead ends: 2000 [2021-11-12 22:40:08,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:40:08,688 INFO L933 BasicCegarLoop]: 1405 mSDtfsCounter, 641 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 191.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 2096 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.59ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 233.27ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:08,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 2096 Invalid, 137 Unknown, 0 Unchecked, 7.59ms Time], IncrementalHoareTripleChecker [7 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 233.27ms Time] [2021-11-12 22:40:08,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-11-12 22:40:08,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1979. [2021-11-12 22:40:08,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1979 states, 1977 states have (on average 1.4410723318158827) internal successors, (2849), 1978 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:08,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1979 states to 1979 states and 2849 transitions. [2021-11-12 22:40:08,817 INFO L78 Accepts]: Start accepts. Automaton has 1979 states and 2849 transitions. Word has length 216 [2021-11-12 22:40:08,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:08,821 INFO L470 AbstractCegarLoop]: Abstraction has 1979 states and 2849 transitions. [2021-11-12 22:40:08,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:08,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1979 states and 2849 transitions. [2021-11-12 22:40:08,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-12 22:40:08,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:08,833 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:08,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 22:40:08,834 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:08,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:08,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1378256782, now seen corresponding path program 1 times [2021-11-12 22:40:08,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:08,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725793596] [2021-11-12 22:40:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:08,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:08,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:08,949 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:08,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725793596] [2021-11-12 22:40:08,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725793596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:08,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:08,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:40:08,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391999719] [2021-11-12 22:40:08,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:08,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:40:08,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:08,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:40:08,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:40:08,954 INFO L87 Difference]: Start difference. First operand 1979 states and 2849 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:09,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:09,427 INFO L93 Difference]: Finished difference Result 5785 states and 8314 transitions. [2021-11-12 22:40:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:40:09,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2021-11-12 22:40:09,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:09,455 INFO L225 Difference]: With dead ends: 5785 [2021-11-12 22:40:09,455 INFO L226 Difference]: Without dead ends: 3938 [2021-11-12 22:40:09,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:40:09,469 INFO L933 BasicCegarLoop]: 1438 mSDtfsCounter, 755 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 176.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.16ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 247.86ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:09,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 2155 Invalid, 123 Unknown, 0 Unchecked, 8.16ms Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 247.86ms Time] [2021-11-12 22:40:09,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2021-11-12 22:40:09,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 1982. [2021-11-12 22:40:09,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1980 states have (on average 1.4404040404040404) internal successors, (2852), 1981 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 2852 transitions. [2021-11-12 22:40:09,678 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 2852 transitions. Word has length 216 [2021-11-12 22:40:09,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:09,678 INFO L470 AbstractCegarLoop]: Abstraction has 1982 states and 2852 transitions. [2021-11-12 22:40:09,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:09,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 2852 transitions. [2021-11-12 22:40:09,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-12 22:40:09,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:09,685 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:09,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 22:40:09,686 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:09,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:09,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1272196581, now seen corresponding path program 1 times [2021-11-12 22:40:09,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:09,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757665367] [2021-11-12 22:40:09,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:09,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:09,798 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:09,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757665367] [2021-11-12 22:40:09,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757665367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:09,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:09,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:40:09,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896876907] [2021-11-12 22:40:09,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:09,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:40:09,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:09,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:40:09,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:40:09,801 INFO L87 Difference]: Start difference. First operand 1982 states and 2852 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:10,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:10,173 INFO L93 Difference]: Finished difference Result 3945 states and 5792 transitions. [2021-11-12 22:40:10,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:40:10,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2021-11-12 22:40:10,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:10,192 INFO L225 Difference]: With dead ends: 3945 [2021-11-12 22:40:10,192 INFO L226 Difference]: Without dead ends: 2650 [2021-11-12 22:40:10,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:40:10,204 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 439 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 146.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.60ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 178.96ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:10,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 1506 Invalid, 117 Unknown, 0 Unchecked, 5.60ms Time], IncrementalHoareTripleChecker [13 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 178.96ms Time] [2021-11-12 22:40:10,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-11-12 22:40:10,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2346. [2021-11-12 22:40:10,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2344 states have (on average 1.4667235494880546) internal successors, (3438), 2345 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:10,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 3438 transitions. [2021-11-12 22:40:10,393 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 3438 transitions. Word has length 216 [2021-11-12 22:40:10,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:10,394 INFO L470 AbstractCegarLoop]: Abstraction has 2346 states and 3438 transitions. [2021-11-12 22:40:10,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:10,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 3438 transitions. [2021-11-12 22:40:10,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-12 22:40:10,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:10,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:10,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 22:40:10,401 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:10,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:10,402 INFO L85 PathProgramCache]: Analyzing trace with hash -530529529, now seen corresponding path program 1 times [2021-11-12 22:40:10,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:10,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146830714] [2021-11-12 22:40:10,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:10,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:10,828 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:10,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146830714] [2021-11-12 22:40:10,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146830714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:10,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:10,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:40:10,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688408920] [2021-11-12 22:40:10,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:10,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:40:10,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:10,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:40:10,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:40:10,831 INFO L87 Difference]: Start difference. First operand 2346 states and 3438 transitions. Second operand has 5 states, 5 states have (on average 43.4) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:11,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:11,456 INFO L93 Difference]: Finished difference Result 6814 states and 9977 transitions. [2021-11-12 22:40:11,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:40:11,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.4) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 217 [2021-11-12 22:40:11,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:11,483 INFO L225 Difference]: With dead ends: 6814 [2021-11-12 22:40:11,483 INFO L226 Difference]: Without dead ends: 4483 [2021-11-12 22:40:11,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:40:11,488 INFO L933 BasicCegarLoop]: 1172 mSDtfsCounter, 1471 mSDsluCounter, 1428 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 240.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 2530 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.91ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 287.88ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:11,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1471 Valid, 2530 Invalid, 195 Unknown, 0 Unchecked, 10.91ms Time], IncrementalHoareTripleChecker [16 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 287.88ms Time] [2021-11-12 22:40:11,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4483 states. [2021-11-12 22:40:11,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4483 to 4462. [2021-11-12 22:40:11,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4462 states, 4460 states have (on average 1.4585201793721974) internal successors, (6505), 4461 states have internal predecessors, (6505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:11,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4462 states to 4462 states and 6505 transitions. [2021-11-12 22:40:11,873 INFO L78 Accepts]: Start accepts. Automaton has 4462 states and 6505 transitions. Word has length 217 [2021-11-12 22:40:11,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:11,873 INFO L470 AbstractCegarLoop]: Abstraction has 4462 states and 6505 transitions. [2021-11-12 22:40:11,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.4) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:11,874 INFO L276 IsEmpty]: Start isEmpty. Operand 4462 states and 6505 transitions. [2021-11-12 22:40:11,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-12 22:40:11,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:11,883 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:11,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 22:40:11,885 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:11,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:11,886 INFO L85 PathProgramCache]: Analyzing trace with hash -6756877, now seen corresponding path program 1 times [2021-11-12 22:40:11,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:11,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872805865] [2021-11-12 22:40:11,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:11,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:12,257 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:12,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872805865] [2021-11-12 22:40:12,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872805865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:12,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:12,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:40:12,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209249483] [2021-11-12 22:40:12,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:12,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:40:12,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:12,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:40:12,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:40:12,259 INFO L87 Difference]: Start difference. First operand 4462 states and 6505 transitions. Second operand has 4 states, 4 states have (on average 54.5) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:13,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:13,111 INFO L93 Difference]: Finished difference Result 12885 states and 18739 transitions. [2021-11-12 22:40:13,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:40:13,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2021-11-12 22:40:13,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:13,167 INFO L225 Difference]: With dead ends: 12885 [2021-11-12 22:40:13,168 INFO L226 Difference]: Without dead ends: 8561 [2021-11-12 22:40:13,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:40:13,177 INFO L933 BasicCegarLoop]: 1164 mSDtfsCounter, 1623 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 179.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1623 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.38ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 221.13ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:13,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1623 Valid, 1847 Invalid, 137 Unknown, 0 Unchecked, 10.38ms Time], IncrementalHoareTripleChecker [13 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 221.13ms Time] [2021-11-12 22:40:13,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8561 states. [2021-11-12 22:40:13,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8561 to 8540. [2021-11-12 22:40:13,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8540 states, 8538 states have (on average 1.4476458186929022) internal successors, (12360), 8539 states have internal predecessors, (12360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:13,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8540 states to 8540 states and 12360 transitions. [2021-11-12 22:40:13,815 INFO L78 Accepts]: Start accepts. Automaton has 8540 states and 12360 transitions. Word has length 218 [2021-11-12 22:40:13,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:13,816 INFO L470 AbstractCegarLoop]: Abstraction has 8540 states and 12360 transitions. [2021-11-12 22:40:13,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:13,817 INFO L276 IsEmpty]: Start isEmpty. Operand 8540 states and 12360 transitions. [2021-11-12 22:40:13,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-12 22:40:13,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:13,835 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:13,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 22:40:13,836 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:13,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:13,836 INFO L85 PathProgramCache]: Analyzing trace with hash -182765800, now seen corresponding path program 1 times [2021-11-12 22:40:13,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:13,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874787551] [2021-11-12 22:40:13,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:13,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:14,158 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:14,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874787551] [2021-11-12 22:40:14,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874787551] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:14,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:14,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:40:14,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98728025] [2021-11-12 22:40:14,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:14,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:40:14,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:14,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:40:14,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:40:14,160 INFO L87 Difference]: Start difference. First operand 8540 states and 12360 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:15,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:15,434 INFO L93 Difference]: Finished difference Result 25026 states and 36159 transitions. [2021-11-12 22:40:15,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:40:15,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2021-11-12 22:40:15,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:15,494 INFO L225 Difference]: With dead ends: 25026 [2021-11-12 22:40:15,494 INFO L226 Difference]: Without dead ends: 16628 [2021-11-12 22:40:15,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:40:15,510 INFO L933 BasicCegarLoop]: 722 mSDtfsCounter, 2048 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 187.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2048 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.37ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 224.58ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:15,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2048 Valid, 1396 Invalid, 131 Unknown, 0 Unchecked, 9.37ms Time], IncrementalHoareTripleChecker [17 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 224.58ms Time] [2021-11-12 22:40:15,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16628 states. [2021-11-12 22:40:16,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16628 to 16607. [2021-11-12 22:40:16,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16607 states, 16605 states have (on average 1.436796145739235) internal successors, (23858), 16606 states have internal predecessors, (23858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:16,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16607 states to 16607 states and 23858 transitions. [2021-11-12 22:40:16,901 INFO L78 Accepts]: Start accepts. Automaton has 16607 states and 23858 transitions. Word has length 220 [2021-11-12 22:40:16,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:16,901 INFO L470 AbstractCegarLoop]: Abstraction has 16607 states and 23858 transitions. [2021-11-12 22:40:16,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:16,903 INFO L276 IsEmpty]: Start isEmpty. Operand 16607 states and 23858 transitions. [2021-11-12 22:40:16,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-12 22:40:16,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:16,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:16,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 22:40:16,934 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:16,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:16,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1023241810, now seen corresponding path program 1 times [2021-11-12 22:40:16,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:16,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395316130] [2021-11-12 22:40:16,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:16,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:17,033 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:17,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395316130] [2021-11-12 22:40:17,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395316130] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:17,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:17,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:40:17,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332525815] [2021-11-12 22:40:17,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:17,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:40:17,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:17,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:40:17,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:40:17,036 INFO L87 Difference]: Start difference. First operand 16607 states and 23858 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:18,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:18,402 INFO L93 Difference]: Finished difference Result 34740 states and 51380 transitions. [2021-11-12 22:40:18,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:40:18,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2021-11-12 22:40:18,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:18,464 INFO L225 Difference]: With dead ends: 34740 [2021-11-12 22:40:18,464 INFO L226 Difference]: Without dead ends: 23247 [2021-11-12 22:40:18,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:40:18,484 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 406 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 161.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.61ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 204.29ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:18,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 1474 Invalid, 119 Unknown, 0 Unchecked, 5.61ms Time], IncrementalHoareTripleChecker [13 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 204.29ms Time] [2021-11-12 22:40:18,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23247 states. [2021-11-12 22:40:19,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23247 to 21371. [2021-11-12 22:40:19,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21371 states, 21369 states have (on average 1.4735364312789554) internal successors, (31488), 21370 states have internal predecessors, (31488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:19,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21371 states to 21371 states and 31488 transitions. [2021-11-12 22:40:19,993 INFO L78 Accepts]: Start accepts. Automaton has 21371 states and 31488 transitions. Word has length 222 [2021-11-12 22:40:19,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:19,994 INFO L470 AbstractCegarLoop]: Abstraction has 21371 states and 31488 transitions. [2021-11-12 22:40:19,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:19,995 INFO L276 IsEmpty]: Start isEmpty. Operand 21371 states and 31488 transitions. [2021-11-12 22:40:20,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-12 22:40:20,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:20,024 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:20,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 22:40:20,025 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:20,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:20,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1284747954, now seen corresponding path program 1 times [2021-11-12 22:40:20,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:20,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736971254] [2021-11-12 22:40:20,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:20,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:20,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:20,082 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:20,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736971254] [2021-11-12 22:40:20,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736971254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:20,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:20,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:40:20,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989213615] [2021-11-12 22:40:20,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:20,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:40:20,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:20,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:40:20,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:40:20,085 INFO L87 Difference]: Start difference. First operand 21371 states and 31488 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:22,484 INFO L93 Difference]: Finished difference Result 63733 states and 93910 transitions. [2021-11-12 22:40:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:40:22,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2021-11-12 22:40:22,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:22,621 INFO L225 Difference]: With dead ends: 63733 [2021-11-12 22:40:22,621 INFO L226 Difference]: Without dead ends: 42585 [2021-11-12 22:40:22,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:40:22,657 INFO L933 BasicCegarLoop]: 1405 mSDtfsCounter, 725 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 245.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 2116 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.84ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 438.36ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:22,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 2116 Invalid, 120 Unknown, 0 Unchecked, 8.84ms Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 438.36ms Time] [2021-11-12 22:40:22,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42585 states. [2021-11-12 22:40:24,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42585 to 21404. [2021-11-12 22:40:24,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21404 states, 21402 states have (on average 1.472806279786936) internal successors, (31521), 21403 states have internal predecessors, (31521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:24,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21404 states to 21404 states and 31521 transitions. [2021-11-12 22:40:24,255 INFO L78 Accepts]: Start accepts. Automaton has 21404 states and 31521 transitions. Word has length 222 [2021-11-12 22:40:24,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:24,255 INFO L470 AbstractCegarLoop]: Abstraction has 21404 states and 31521 transitions. [2021-11-12 22:40:24,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:24,256 INFO L276 IsEmpty]: Start isEmpty. Operand 21404 states and 31521 transitions. [2021-11-12 22:40:24,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-12 22:40:24,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:24,282 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:24,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 22:40:24,283 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:24,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:24,284 INFO L85 PathProgramCache]: Analyzing trace with hash -450214639, now seen corresponding path program 1 times [2021-11-12 22:40:24,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:24,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208145473] [2021-11-12 22:40:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:24,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:24,381 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:24,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208145473] [2021-11-12 22:40:24,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208145473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:24,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:24,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:40:24,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934994755] [2021-11-12 22:40:24,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:24,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:40:24,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:24,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:40:24,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:40:24,384 INFO L87 Difference]: Start difference. First operand 21404 states and 31521 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:26,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:26,878 INFO L93 Difference]: Finished difference Result 61533 states and 90442 transitions. [2021-11-12 22:40:26,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:40:26,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2021-11-12 22:40:26,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:26,979 INFO L225 Difference]: With dead ends: 61533 [2021-11-12 22:40:26,979 INFO L226 Difference]: Without dead ends: 41724 [2021-11-12 22:40:27,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:40:27,012 INFO L933 BasicCegarLoop]: 1196 mSDtfsCounter, 620 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 159.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.55ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 189.85ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:27,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 1881 Invalid, 129 Unknown, 0 Unchecked, 6.55ms Time], IncrementalHoareTripleChecker [7 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 189.85ms Time] [2021-11-12 22:40:27,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41724 states. [2021-11-12 22:40:29,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41724 to 41703. [2021-11-12 22:40:29,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41703 states, 41701 states have (on average 1.465432483633486) internal successors, (61110), 41702 states have internal predecessors, (61110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:29,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41703 states to 41703 states and 61110 transitions. [2021-11-12 22:40:29,568 INFO L78 Accepts]: Start accepts. Automaton has 41703 states and 61110 transitions. Word has length 222 [2021-11-12 22:40:29,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:29,569 INFO L470 AbstractCegarLoop]: Abstraction has 41703 states and 61110 transitions. [2021-11-12 22:40:29,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:29,569 INFO L276 IsEmpty]: Start isEmpty. Operand 41703 states and 61110 transitions. [2021-11-12 22:40:29,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-12 22:40:29,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:29,614 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:29,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 22:40:29,614 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:29,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:29,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1731935505, now seen corresponding path program 1 times [2021-11-12 22:40:29,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:29,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032231129] [2021-11-12 22:40:29,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:29,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:29,894 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:29,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032231129] [2021-11-12 22:40:29,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032231129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:29,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:29,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:40:29,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377831444] [2021-11-12 22:40:29,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:29,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:40:29,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:29,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:40:29,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:40:29,898 INFO L87 Difference]: Start difference. First operand 41703 states and 61110 transitions. Second operand has 5 states, 5 states have (on average 44.6) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:34,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:34,978 INFO L93 Difference]: Finished difference Result 121712 states and 178297 transitions. [2021-11-12 22:40:34,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:40:34,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.6) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 223 [2021-11-12 22:40:34,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:35,103 INFO L225 Difference]: With dead ends: 121712 [2021-11-12 22:40:35,103 INFO L226 Difference]: Without dead ends: 80209 [2021-11-12 22:40:35,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:40:35,148 INFO L933 BasicCegarLoop]: 1149 mSDtfsCounter, 1444 mSDsluCounter, 1426 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 194.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1444 SdHoareTripleChecker+Valid, 2509 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.94ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 234.04ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:35,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1444 Valid, 2509 Invalid, 185 Unknown, 0 Unchecked, 9.94ms Time], IncrementalHoareTripleChecker [12 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 234.04ms Time] [2021-11-12 22:40:35,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80209 states. [2021-11-12 22:40:40,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80209 to 80188. [2021-11-12 22:40:40,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80188 states, 80186 states have (on average 1.4586212056967551) internal successors, (116961), 80187 states have internal predecessors, (116961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:40,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80188 states to 80188 states and 116961 transitions. [2021-11-12 22:40:40,435 INFO L78 Accepts]: Start accepts. Automaton has 80188 states and 116961 transitions. Word has length 223 [2021-11-12 22:40:40,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:40:40,436 INFO L470 AbstractCegarLoop]: Abstraction has 80188 states and 116961 transitions. [2021-11-12 22:40:40,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.6) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:40,436 INFO L276 IsEmpty]: Start isEmpty. Operand 80188 states and 116961 transitions. [2021-11-12 22:40:40,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-12 22:40:40,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:40:40,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:40:40,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 22:40:40,490 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:40:40,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:40:40,491 INFO L85 PathProgramCache]: Analyzing trace with hash 28354286, now seen corresponding path program 1 times [2021-11-12 22:40:40,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:40:40,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411145988] [2021-11-12 22:40:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:40:40,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:40:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:40:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:40:40,735 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:40:40,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411145988] [2021-11-12 22:40:40,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411145988] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:40:40,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:40:40,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:40:40,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534888838] [2021-11-12 22:40:40,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:40:40,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:40:40,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:40:40,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:40:40,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:40:40,737 INFO L87 Difference]: Start difference. First operand 80188 states and 116961 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:40:49,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:40:49,898 INFO L93 Difference]: Finished difference Result 230612 states and 335437 transitions. [2021-11-12 22:40:49,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:40:49,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2021-11-12 22:40:49,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:40:50,231 INFO L225 Difference]: With dead ends: 230612 [2021-11-12 22:40:50,231 INFO L226 Difference]: Without dead ends: 152688 [2021-11-12 22:40:50,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:40:50,330 INFO L933 BasicCegarLoop]: 1147 mSDtfsCounter, 1610 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 147.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 1831 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.68ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 178.03ms IncrementalHoareTripleChecker+Time [2021-11-12 22:40:50,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1610 Valid, 1831 Invalid, 130 Unknown, 0 Unchecked, 6.68ms Time], IncrementalHoareTripleChecker [9 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 178.03ms Time] [2021-11-12 22:40:50,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152688 states.