./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 958ad7cbd67a25f08fdfb008e82df18bba1cce7737ba27f2fb1a13f2299466c1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:30:16,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:30:16,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:30:16,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:30:16,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:30:16,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:30:16,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:30:16,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:30:16,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:30:16,915 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:30:16,917 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:30:16,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:30:16,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:30:16,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:30:16,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:30:16,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:30:16,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:30:16,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:30:16,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:30:16,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:30:16,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:30:16,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:30:16,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:30:16,975 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:30:16,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:30:16,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:30:16,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:30:16,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:30:16,986 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:30:16,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:30:16,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:30:16,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:30:16,993 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:30:16,995 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:30:16,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:30:16,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:30:16,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:30:16,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:30:17,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:30:17,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:30:17,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:30:17,003 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:30:17,058 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:30:17,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:30:17,060 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:30:17,061 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:30:17,061 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:30:17,061 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:30:17,061 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:30:17,062 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:30:17,062 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:30:17,062 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:30:17,072 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:30:17,072 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:30:17,073 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:30:17,073 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:30:17,073 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:30:17,074 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:30:17,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:30:17,075 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:30:17,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:30:17,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:30:17,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:30:17,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:30:17,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:30:17,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:30:17,077 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:30:17,077 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:30:17,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:30:17,078 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:30:17,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:30:17,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:30:17,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:30:17,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:30:17,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:30:17,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:30:17,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:30:17,081 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:30:17,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:30:17,081 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:30:17,082 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:30:17,082 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:30:17,082 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_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 958ad7cbd67a25f08fdfb008e82df18bba1cce7737ba27f2fb1a13f2299466c1 [2021-11-19 13:30:17,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:30:17,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:30:17,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:30:17,493 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:30:17,496 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:30:17,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-19 13:30:17,587 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/data/65b06934f/388a14036ff147c19b48ee97c31b0251/FLAG594fcbb42 [2021-11-19 13:30:18,188 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:30:18,189 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-19 13:30:18,204 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/data/65b06934f/388a14036ff147c19b48ee97c31b0251/FLAG594fcbb42 [2021-11-19 13:30:18,481 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/data/65b06934f/388a14036ff147c19b48ee97c31b0251 [2021-11-19 13:30:18,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:30:18,486 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:30:18,488 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:30:18,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:30:18,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:30:18,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:30:18" (1/1) ... [2021-11-19 13:30:18,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5672837e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:18, skipping insertion in model container [2021-11-19 13:30:18,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:30:18" (1/1) ... [2021-11-19 13:30:18,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:30:18,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:30:18,929 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7920,7933] [2021-11-19 13:30:19,019 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:30:19,039 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:30:19,118 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7920,7933] [2021-11-19 13:30:19,177 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:30:19,210 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:30:19,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:19 WrapperNode [2021-11-19 13:30:19,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:30:19,212 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:30:19,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:30:19,212 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:30:19,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:19" (1/1) ... [2021-11-19 13:30:19,238 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:19" (1/1) ... [2021-11-19 13:30:19,322 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 635 [2021-11-19 13:30:19,335 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:30:19,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:30:19,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:30:19,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:30:19,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:19" (1/1) ... [2021-11-19 13:30:19,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:19" (1/1) ... [2021-11-19 13:30:19,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:19" (1/1) ... [2021-11-19 13:30:19,377 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:19" (1/1) ... [2021-11-19 13:30:19,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:19" (1/1) ... [2021-11-19 13:30:19,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:19" (1/1) ... [2021-11-19 13:30:19,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:19" (1/1) ... [2021-11-19 13:30:19,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:30:19,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:30:19,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:30:19,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:30:19,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:19" (1/1) ... [2021-11-19 13:30:19,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:30:19,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:30:19,509 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:30:19,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:30:19,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:30:19,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 13:30:19,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:30:19,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:30:19,800 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:30:19,802 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:30:20,542 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:30:20,924 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:30:20,925 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 13:30:20,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:30:20 BoogieIcfgContainer [2021-11-19 13:30:20,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:30:20,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:30:20,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:30:20,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:30:20,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:30:18" (1/3) ... [2021-11-19 13:30:20,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145fcefc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:30:20, skipping insertion in model container [2021-11-19 13:30:20,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:19" (2/3) ... [2021-11-19 13:30:20,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145fcefc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:30:20, skipping insertion in model container [2021-11-19 13:30:20,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:30:20" (3/3) ... [2021-11-19 13:30:20,943 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-19 13:30:20,955 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:30:20,955 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:30:21,012 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:30:21,021 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 13:30:21,021 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:30:21,041 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 96 states have (on average 1.7604166666666667) internal successors, (169), 97 states have internal predecessors, (169), 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) [2021-11-19 13:30:21,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 13:30:21,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:21,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:21,053 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:21,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:21,060 INFO L85 PathProgramCache]: Analyzing trace with hash 329552140, now seen corresponding path program 1 times [2021-11-19 13:30:21,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:30:21,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030662010] [2021-11-19 13:30:21,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:21,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:30:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:21,446 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:30:21,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030662010] [2021-11-19 13:30:21,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030662010] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:21,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:21,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:30:21,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6294834] [2021-11-19 13:30:21,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:21,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:30:21,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:30:21,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:30:21,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:30:21,538 INFO L87 Difference]: Start difference. First operand has 98 states, 96 states have (on average 1.7604166666666667) internal successors, (169), 97 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2021-11-19 13:30:21,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:21,683 INFO L93 Difference]: Finished difference Result 216 states and 358 transitions. [2021-11-19 13:30:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:30:21,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 43 [2021-11-19 13:30:21,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:21,704 INFO L225 Difference]: With dead ends: 216 [2021-11-19 13:30:21,704 INFO L226 Difference]: Without dead ends: 146 [2021-11-19 13:30:21,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:30:21,714 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 108 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:21,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 360 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:30:21,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-19 13:30:21,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2021-11-19 13:30:21,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.5034965034965035) internal successors, (215), 143 states have internal predecessors, (215), 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) [2021-11-19 13:30:21,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 215 transitions. [2021-11-19 13:30:21,777 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 215 transitions. Word has length 43 [2021-11-19 13:30:21,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:21,778 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 215 transitions. [2021-11-19 13:30:21,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2021-11-19 13:30:21,778 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 215 transitions. [2021-11-19 13:30:21,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 13:30:21,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:21,780 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] [2021-11-19 13:30:21,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 13:30:21,781 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:21,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:21,782 INFO L85 PathProgramCache]: Analyzing trace with hash 497269843, now seen corresponding path program 1 times [2021-11-19 13:30:21,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:30:21,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723065415] [2021-11-19 13:30:21,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:21,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:30:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:21,974 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:30:21,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723065415] [2021-11-19 13:30:21,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723065415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:21,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:21,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:30:21,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584080095] [2021-11-19 13:30:21,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:21,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:30:21,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:30:21,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:30:21,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:30:21,977 INFO L87 Difference]: Start difference. First operand 144 states and 215 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2021-11-19 13:30:22,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:22,057 INFO L93 Difference]: Finished difference Result 309 states and 482 transitions. [2021-11-19 13:30:22,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:30:22,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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 45 [2021-11-19 13:30:22,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:22,061 INFO L225 Difference]: With dead ends: 309 [2021-11-19 13:30:22,061 INFO L226 Difference]: Without dead ends: 197 [2021-11-19 13:30:22,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:30:22,065 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 95 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:22,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 205 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:30:22,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-19 13:30:22,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2021-11-19 13:30:22,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.5154639175257731) internal successors, (294), 194 states have internal predecessors, (294), 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) [2021-11-19 13:30:22,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 294 transitions. [2021-11-19 13:30:22,093 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 294 transitions. Word has length 45 [2021-11-19 13:30:22,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:22,094 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 294 transitions. [2021-11-19 13:30:22,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2021-11-19 13:30:22,095 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 294 transitions. [2021-11-19 13:30:22,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 13:30:22,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:22,102 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] [2021-11-19 13:30:22,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 13:30:22,103 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:22,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:22,105 INFO L85 PathProgramCache]: Analyzing trace with hash 385793492, now seen corresponding path program 1 times [2021-11-19 13:30:22,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:30:22,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794861917] [2021-11-19 13:30:22,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:22,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:30:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:22,259 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:30:22,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794861917] [2021-11-19 13:30:22,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794861917] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:22,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:22,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:30:22,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695458795] [2021-11-19 13:30:22,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:22,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:30:22,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:30:22,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:30:22,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:30:22,265 INFO L87 Difference]: Start difference. First operand 195 states and 294 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2021-11-19 13:30:22,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:22,343 INFO L93 Difference]: Finished difference Result 475 states and 745 transitions. [2021-11-19 13:30:22,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:30:22,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 47 [2021-11-19 13:30:22,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:22,348 INFO L225 Difference]: With dead ends: 475 [2021-11-19 13:30:22,348 INFO L226 Difference]: Without dead ends: 314 [2021-11-19 13:30:22,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:30:22,351 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 95 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:22,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 276 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:30:22,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-19 13:30:22,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2021-11-19 13:30:22,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.5466237942122187) internal successors, (481), 311 states have internal predecessors, (481), 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) [2021-11-19 13:30:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 481 transitions. [2021-11-19 13:30:22,411 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 481 transitions. Word has length 47 [2021-11-19 13:30:22,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:22,411 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 481 transitions. [2021-11-19 13:30:22,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2021-11-19 13:30:22,412 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 481 transitions. [2021-11-19 13:30:22,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-19 13:30:22,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:22,413 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] [2021-11-19 13:30:22,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 13:30:22,414 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:22,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:22,421 INFO L85 PathProgramCache]: Analyzing trace with hash 2142314995, now seen corresponding path program 1 times [2021-11-19 13:30:22,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:30:22,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63247328] [2021-11-19 13:30:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:22,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:30:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:22,538 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:30:22,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63247328] [2021-11-19 13:30:22,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63247328] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:22,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:22,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:30:22,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397333750] [2021-11-19 13:30:22,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:22,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:30:22,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:30:22,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:30:22,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:30:22,543 INFO L87 Difference]: Start difference. First operand 312 states and 481 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-11-19 13:30:22,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:22,617 INFO L93 Difference]: Finished difference Result 767 states and 1212 transitions. [2021-11-19 13:30:22,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:30:22,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 49 [2021-11-19 13:30:22,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:22,624 INFO L225 Difference]: With dead ends: 767 [2021-11-19 13:30:22,624 INFO L226 Difference]: Without dead ends: 489 [2021-11-19 13:30:22,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:30:22,640 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 94 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:22,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 241 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:30:22,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-11-19 13:30:22,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 487. [2021-11-19 13:30:22,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 1.5658436213991769) internal successors, (761), 486 states have internal predecessors, (761), 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) [2021-11-19 13:30:22,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 761 transitions. [2021-11-19 13:30:22,690 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 761 transitions. Word has length 49 [2021-11-19 13:30:22,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:22,691 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 761 transitions. [2021-11-19 13:30:22,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-11-19 13:30:22,691 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 761 transitions. [2021-11-19 13:30:22,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 13:30:22,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:22,693 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] [2021-11-19 13:30:22,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 13:30:22,693 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:22,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:22,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1343889268, now seen corresponding path program 1 times [2021-11-19 13:30:22,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:30:22,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621962997] [2021-11-19 13:30:22,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:22,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:30:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:22,785 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:30:22,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621962997] [2021-11-19 13:30:22,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621962997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:22,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:22,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:30:22,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458971080] [2021-11-19 13:30:22,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:22,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:30:22,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:30:22,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:30:22,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:30:22,787 INFO L87 Difference]: Start difference. First operand 487 states and 761 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-11-19 13:30:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:22,932 INFO L93 Difference]: Finished difference Result 1235 states and 1960 transitions. [2021-11-19 13:30:22,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:30:22,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 51 [2021-11-19 13:30:22,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:22,939 INFO L225 Difference]: With dead ends: 1235 [2021-11-19 13:30:22,940 INFO L226 Difference]: Without dead ends: 798 [2021-11-19 13:30:22,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:30:22,942 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 89 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:22,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 252 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:30:22,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-11-19 13:30:22,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 796. [2021-11-19 13:30:22,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 1.568553459119497) internal successors, (1247), 795 states have internal predecessors, (1247), 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) [2021-11-19 13:30:23,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1247 transitions. [2021-11-19 13:30:23,001 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1247 transitions. Word has length 51 [2021-11-19 13:30:23,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:23,002 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 1247 transitions. [2021-11-19 13:30:23,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-11-19 13:30:23,002 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1247 transitions. [2021-11-19 13:30:23,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 13:30:23,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:23,003 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] [2021-11-19 13:30:23,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 13:30:23,004 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:23,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:23,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1196001752, now seen corresponding path program 1 times [2021-11-19 13:30:23,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:30:23,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872813317] [2021-11-19 13:30:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:23,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:30:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:23,145 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:30:23,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872813317] [2021-11-19 13:30:23,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872813317] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:23,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:23,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:30:23,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074764232] [2021-11-19 13:30:23,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:23,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:30:23,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:30:23,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:30:23,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:30:23,148 INFO L87 Difference]: Start difference. First operand 796 states and 1247 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-11-19 13:30:23,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:23,271 INFO L93 Difference]: Finished difference Result 1995 states and 3163 transitions. [2021-11-19 13:30:23,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:30:23,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 53 [2021-11-19 13:30:23,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:23,282 INFO L225 Difference]: With dead ends: 1995 [2021-11-19 13:30:23,282 INFO L226 Difference]: Without dead ends: 1249 [2021-11-19 13:30:23,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:30:23,285 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 88 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:23,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 243 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:30:23,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2021-11-19 13:30:23,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1247. [2021-11-19 13:30:23,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 1.5762439807383628) internal successors, (1964), 1246 states have internal predecessors, (1964), 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) [2021-11-19 13:30:23,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 1964 transitions. [2021-11-19 13:30:23,378 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 1964 transitions. Word has length 53 [2021-11-19 13:30:23,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:23,378 INFO L470 AbstractCegarLoop]: Abstraction has 1247 states and 1964 transitions. [2021-11-19 13:30:23,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-11-19 13:30:23,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 1964 transitions. [2021-11-19 13:30:23,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-19 13:30:23,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:23,380 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] [2021-11-19 13:30:23,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 13:30:23,380 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:23,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:23,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1594004199, now seen corresponding path program 1 times [2021-11-19 13:30:23,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:30:23,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160068978] [2021-11-19 13:30:23,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:23,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:30:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:23,446 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:30:23,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160068978] [2021-11-19 13:30:23,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160068978] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:23,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:23,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 13:30:23,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392162812] [2021-11-19 13:30:23,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:23,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:30:23,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:30:23,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:30:23,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:30:23,449 INFO L87 Difference]: Start difference. First operand 1247 states and 1964 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-11-19 13:30:23,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:23,868 INFO L93 Difference]: Finished difference Result 3944 states and 6219 transitions. [2021-11-19 13:30:23,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:30:23,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 55 [2021-11-19 13:30:23,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:23,887 INFO L225 Difference]: With dead ends: 3944 [2021-11-19 13:30:23,888 INFO L226 Difference]: Without dead ends: 2763 [2021-11-19 13:30:23,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:30:23,891 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 546 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:23,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 959 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:30:23,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2021-11-19 13:30:24,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 1985. [2021-11-19 13:30:24,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1984 states have (on average 1.5665322580645162) internal successors, (3108), 1984 states have internal predecessors, (3108), 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) [2021-11-19 13:30:24,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 3108 transitions. [2021-11-19 13:30:24,056 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 3108 transitions. Word has length 55 [2021-11-19 13:30:24,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:24,058 INFO L470 AbstractCegarLoop]: Abstraction has 1985 states and 3108 transitions. [2021-11-19 13:30:24,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-11-19 13:30:24,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 3108 transitions. [2021-11-19 13:30:24,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 13:30:24,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:24,061 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] [2021-11-19 13:30:24,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 13:30:24,062 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:24,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:24,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2062973210, now seen corresponding path program 1 times [2021-11-19 13:30:24,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:30:24,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834140851] [2021-11-19 13:30:24,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:24,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:30:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:24,158 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:30:24,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834140851] [2021-11-19 13:30:24,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834140851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:24,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:24,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:30:24,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583692780] [2021-11-19 13:30:24,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:24,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:30:24,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:30:24,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:30:24,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:30:24,162 INFO L87 Difference]: Start difference. First operand 1985 states and 3108 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2021-11-19 13:30:24,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:24,449 INFO L93 Difference]: Finished difference Result 4674 states and 7329 transitions. [2021-11-19 13:30:24,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:30:24,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 56 [2021-11-19 13:30:24,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:24,470 INFO L225 Difference]: With dead ends: 4674 [2021-11-19 13:30:24,471 INFO L226 Difference]: Without dead ends: 2755 [2021-11-19 13:30:24,477 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 [2021-11-19 13:30:24,480 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 182 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:24,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 347 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:30:24,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2021-11-19 13:30:24,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 2753. [2021-11-19 13:30:24,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 1.5588662790697674) internal successors, (4290), 2752 states have internal predecessors, (4290), 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) [2021-11-19 13:30:24,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 4290 transitions. [2021-11-19 13:30:24,752 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 4290 transitions. Word has length 56 [2021-11-19 13:30:24,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:24,753 INFO L470 AbstractCegarLoop]: Abstraction has 2753 states and 4290 transitions. [2021-11-19 13:30:24,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2021-11-19 13:30:24,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 4290 transitions. [2021-11-19 13:30:24,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 13:30:24,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:24,757 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] [2021-11-19 13:30:24,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 13:30:24,757 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:24,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:24,758 INFO L85 PathProgramCache]: Analyzing trace with hash -530286080, now seen corresponding path program 1 times [2021-11-19 13:30:24,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:30:24,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670070047] [2021-11-19 13:30:24,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:24,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:30:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:24,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:30:24,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670070047] [2021-11-19 13:30:24,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670070047] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:24,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:24,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:30:24,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470630277] [2021-11-19 13:30:24,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:24,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:30:24,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:30:24,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:30:24,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:30:24,822 INFO L87 Difference]: Start difference. First operand 2753 states and 4290 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2021-11-19 13:30:25,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:25,114 INFO L93 Difference]: Finished difference Result 5442 states and 8499 transitions. [2021-11-19 13:30:25,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:30:25,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 57 [2021-11-19 13:30:25,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:25,132 INFO L225 Difference]: With dead ends: 5442 [2021-11-19 13:30:25,132 INFO L226 Difference]: Without dead ends: 2755 [2021-11-19 13:30:25,136 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 [2021-11-19 13:30:25,137 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 190 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:25,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 353 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:30:25,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2021-11-19 13:30:25,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 2753. [2021-11-19 13:30:25,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 1.552688953488372) internal successors, (4273), 2752 states have internal predecessors, (4273), 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) [2021-11-19 13:30:25,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 4273 transitions. [2021-11-19 13:30:25,336 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 4273 transitions. Word has length 57 [2021-11-19 13:30:25,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:25,336 INFO L470 AbstractCegarLoop]: Abstraction has 2753 states and 4273 transitions. [2021-11-19 13:30:25,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2021-11-19 13:30:25,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 4273 transitions. [2021-11-19 13:30:25,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 13:30:25,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:25,337 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] [2021-11-19 13:30:25,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 13:30:25,338 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:25,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:25,338 INFO L85 PathProgramCache]: Analyzing trace with hash 687612577, now seen corresponding path program 1 times [2021-11-19 13:30:25,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:30:25,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124651704] [2021-11-19 13:30:25,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:25,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:30:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:25,387 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:30:25,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124651704] [2021-11-19 13:30:25,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124651704] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:25,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:25,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:30:25,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296389124] [2021-11-19 13:30:25,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:25,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:30:25,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:30:25,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:30:25,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:30:25,389 INFO L87 Difference]: Start difference. First operand 2753 states and 4273 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-11-19 13:30:25,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:25,647 INFO L93 Difference]: Finished difference Result 5442 states and 8465 transitions. [2021-11-19 13:30:25,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:30:25,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 58 [2021-11-19 13:30:25,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:25,665 INFO L225 Difference]: With dead ends: 5442 [2021-11-19 13:30:25,665 INFO L226 Difference]: Without dead ends: 2755 [2021-11-19 13:30:25,670 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 [2021-11-19 13:30:25,671 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 188 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:25,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 356 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:30:25,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2021-11-19 13:30:25,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 2753. [2021-11-19 13:30:25,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 1.5465116279069768) internal successors, (4256), 2752 states have internal predecessors, (4256), 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) [2021-11-19 13:30:25,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 4256 transitions. [2021-11-19 13:30:25,895 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 4256 transitions. Word has length 58 [2021-11-19 13:30:25,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:25,895 INFO L470 AbstractCegarLoop]: Abstraction has 2753 states and 4256 transitions. [2021-11-19 13:30:25,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-11-19 13:30:25,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 4256 transitions. [2021-11-19 13:30:25,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 13:30:25,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:25,896 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] [2021-11-19 13:30:25,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 13:30:25,897 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:25,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:25,898 INFO L85 PathProgramCache]: Analyzing trace with hash -2146587886, now seen corresponding path program 1 times [2021-11-19 13:30:25,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:30:25,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240179065] [2021-11-19 13:30:25,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:25,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:30:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:26,066 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:30:26,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240179065] [2021-11-19 13:30:26,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240179065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:26,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:26,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 13:30:26,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502687702] [2021-11-19 13:30:26,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:26,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:30:26,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:30:26,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:30:26,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:30:26,070 INFO L87 Difference]: Start difference. First operand 2753 states and 4256 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-19 13:30:26,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:26,426 INFO L93 Difference]: Finished difference Result 5442 states and 8431 transitions. [2021-11-19 13:30:26,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:30:26,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 60 [2021-11-19 13:30:26,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:26,447 INFO L225 Difference]: With dead ends: 5442 [2021-11-19 13:30:26,447 INFO L226 Difference]: Without dead ends: 2755 [2021-11-19 13:30:26,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:30:26,452 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 145 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:26,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 448 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:30:26,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2021-11-19 13:30:26,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 2753. [2021-11-19 13:30:26,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 1.5421511627906976) internal successors, (4244), 2752 states have internal predecessors, (4244), 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) [2021-11-19 13:30:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 4244 transitions. [2021-11-19 13:30:26,696 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 4244 transitions. Word has length 60 [2021-11-19 13:30:26,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:26,697 INFO L470 AbstractCegarLoop]: Abstraction has 2753 states and 4244 transitions. [2021-11-19 13:30:26,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2021-11-19 13:30:26,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 4244 transitions. [2021-11-19 13:30:26,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 13:30:26,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:26,698 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] [2021-11-19 13:30:26,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 13:30:26,698 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:26,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:26,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1014792274, now seen corresponding path program 1 times [2021-11-19 13:30:26,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:30:26,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917246820] [2021-11-19 13:30:26,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:26,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:30:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:26,835 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:30:26,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917246820] [2021-11-19 13:30:26,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917246820] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:26,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:26,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 13:30:26,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236192563] [2021-11-19 13:30:26,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:26,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:30:26,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:30:26,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:30:26,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:30:26,838 INFO L87 Difference]: Start difference. First operand 2753 states and 4244 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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) [2021-11-19 13:30:27,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:27,328 INFO L93 Difference]: Finished difference Result 7105 states and 10944 transitions. [2021-11-19 13:30:27,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:30:27,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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 63 [2021-11-19 13:30:27,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:27,361 INFO L225 Difference]: With dead ends: 7105 [2021-11-19 13:30:27,361 INFO L226 Difference]: Without dead ends: 4418 [2021-11-19 13:30:27,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:30:27,368 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 290 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:27,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 361 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:30:27,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4418 states. [2021-11-19 13:30:27,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4418 to 4416. [2021-11-19 13:30:27,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4416 states, 4415 states have (on average 1.5322763306908267) internal successors, (6765), 4415 states have internal predecessors, (6765), 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) [2021-11-19 13:30:27,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4416 states to 4416 states and 6765 transitions. [2021-11-19 13:30:27,792 INFO L78 Accepts]: Start accepts. Automaton has 4416 states and 6765 transitions. Word has length 63 [2021-11-19 13:30:27,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:27,793 INFO L470 AbstractCegarLoop]: Abstraction has 4416 states and 6765 transitions. [2021-11-19 13:30:27,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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) [2021-11-19 13:30:27,793 INFO L276 IsEmpty]: Start isEmpty. Operand 4416 states and 6765 transitions. [2021-11-19 13:30:27,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-19 13:30:27,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:27,794 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] [2021-11-19 13:30:27,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 13:30:27,794 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:27,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:27,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1405226511, now seen corresponding path program 1 times [2021-11-19 13:30:27,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:30:27,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386379027] [2021-11-19 13:30:27,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:27,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:30:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:27,933 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:30:27,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386379027] [2021-11-19 13:30:27,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386379027] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:27,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:27,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 13:30:27,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135611516] [2021-11-19 13:30:27,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:27,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:30:27,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:30:27,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:30:27,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:30:27,936 INFO L87 Difference]: Start difference. First operand 4416 states and 6765 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 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) [2021-11-19 13:30:28,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:28,605 INFO L93 Difference]: Finished difference Result 5613 states and 8557 transitions. [2021-11-19 13:30:28,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:30:28,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 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 64 [2021-11-19 13:30:28,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:28,652 INFO L225 Difference]: With dead ends: 5613 [2021-11-19 13:30:28,652 INFO L226 Difference]: Without dead ends: 5611 [2021-11-19 13:30:28,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:30:28,656 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 257 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:28,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 818 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:30:28,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5611 states. [2021-11-19 13:30:29,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5611 to 4430. [2021-11-19 13:30:29,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4430 states, 4429 states have (on average 1.5281101828855272) internal successors, (6768), 4429 states have internal predecessors, (6768), 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) [2021-11-19 13:30:29,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4430 states to 4430 states and 6768 transitions. [2021-11-19 13:30:29,236 INFO L78 Accepts]: Start accepts. Automaton has 4430 states and 6768 transitions. Word has length 64 [2021-11-19 13:30:29,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:29,236 INFO L470 AbstractCegarLoop]: Abstraction has 4430 states and 6768 transitions. [2021-11-19 13:30:29,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 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) [2021-11-19 13:30:29,238 INFO L276 IsEmpty]: Start isEmpty. Operand 4430 states and 6768 transitions. [2021-11-19 13:30:29,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 13:30:29,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:29,239 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:29,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 13:30:29,240 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:29,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:29,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1587806638, now seen corresponding path program 1 times [2021-11-19 13:30:29,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:30:29,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957931476] [2021-11-19 13:30:29,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:29,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:30:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:29,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 13:30:29,737 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:30:29,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957931476] [2021-11-19 13:30:29,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957931476] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 13:30:29,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820137428] [2021-11-19 13:30:29,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:29,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:30:29,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:30:29,744 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:30:29,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 13:30:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:29,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 13:30:29,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 13:30:31,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 13:30:31,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820137428] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:30:31,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:30:31,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 6] total 16 [2021-11-19 13:30:31,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594487117] [2021-11-19 13:30:31,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:31,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:30:31,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:30:31,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:30:31,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:30:31,987 INFO L87 Difference]: Start difference. First operand 4430 states and 6768 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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) [2021-11-19 13:30:33,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:33,099 INFO L93 Difference]: Finished difference Result 12815 states and 19588 transitions. [2021-11-19 13:30:33,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:30:33,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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 74 [2021-11-19 13:30:33,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:33,131 INFO L225 Difference]: With dead ends: 12815 [2021-11-19 13:30:33,131 INFO L226 Difference]: Without dead ends: 8448 [2021-11-19 13:30:33,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:30:33,143 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 322 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:33,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 334 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:30:33,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8448 states. [2021-11-19 13:30:34,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8448 to 8446. [2021-11-19 13:30:34,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8446 states, 8445 states have (on average 1.5188869153345175) internal successors, (12827), 8445 states have internal predecessors, (12827), 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) [2021-11-19 13:30:34,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8446 states to 8446 states and 12827 transitions. [2021-11-19 13:30:34,252 INFO L78 Accepts]: Start accepts. Automaton has 8446 states and 12827 transitions. Word has length 74 [2021-11-19 13:30:34,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:34,253 INFO L470 AbstractCegarLoop]: Abstraction has 8446 states and 12827 transitions. [2021-11-19 13:30:34,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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) [2021-11-19 13:30:34,253 INFO L276 IsEmpty]: Start isEmpty. Operand 8446 states and 12827 transitions. [2021-11-19 13:30:34,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 13:30:34,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:34,255 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:34,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:34,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-19 13:30:34,479 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:34,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:34,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1520415030, now seen corresponding path program 1 times [2021-11-19 13:30:34,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:30:34,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927171340] [2021-11-19 13:30:34,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:34,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:30:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 13:30:34,555 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:30:34,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927171340] [2021-11-19 13:30:34,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927171340] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:34,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:34,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:30:34,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455336793] [2021-11-19 13:30:34,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:34,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:30:34,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:30:34,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:30:34,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:30:34,562 INFO L87 Difference]: Start difference. First operand 8446 states and 12827 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-11-19 13:30:35,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:35,773 INFO L93 Difference]: Finished difference Result 19834 states and 30241 transitions. [2021-11-19 13:30:35,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:30:35,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 75 [2021-11-19 13:30:35,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:35,813 INFO L225 Difference]: With dead ends: 19834 [2021-11-19 13:30:35,814 INFO L226 Difference]: Without dead ends: 11446 [2021-11-19 13:30:35,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:30:35,828 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 91 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:35,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 257 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:30:35,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11446 states. [2021-11-19 13:30:36,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11446 to 11444. [2021-11-19 13:30:36,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11444 states, 11443 states have (on average 1.5093069999126103) internal successors, (17271), 11443 states have internal predecessors, (17271), 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) [2021-11-19 13:30:36,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11444 states to 11444 states and 17271 transitions. [2021-11-19 13:30:36,999 INFO L78 Accepts]: Start accepts. Automaton has 11444 states and 17271 transitions. Word has length 75 [2021-11-19 13:30:36,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:36,999 INFO L470 AbstractCegarLoop]: Abstraction has 11444 states and 17271 transitions. [2021-11-19 13:30:36,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-11-19 13:30:36,999 INFO L276 IsEmpty]: Start isEmpty. Operand 11444 states and 17271 transitions. [2021-11-19 13:30:37,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-19 13:30:37,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:37,001 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:37,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 13:30:37,002 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:37,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:37,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1253184500, now seen corresponding path program 1 times [2021-11-19 13:30:37,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:30:37,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39840216] [2021-11-19 13:30:37,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:37,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:30:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 13:30:37,087 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:30:37,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39840216] [2021-11-19 13:30:37,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39840216] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:37,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:37,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:30:37,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103973495] [2021-11-19 13:30:37,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:37,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:30:37,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:30:37,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:30:37,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:30:37,089 INFO L87 Difference]: Start difference. First operand 11444 states and 17271 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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) [2021-11-19 13:30:38,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:38,109 INFO L93 Difference]: Finished difference Result 22832 states and 34475 transitions. [2021-11-19 13:30:38,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:30:38,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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 78 [2021-11-19 13:30:38,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:38,144 INFO L225 Difference]: With dead ends: 22832 [2021-11-19 13:30:38,144 INFO L226 Difference]: Without dead ends: 11444 [2021-11-19 13:30:38,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:30:38,164 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 334 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:38,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 122 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:30:38,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11444 states. [2021-11-19 13:30:39,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11444 to 11444. [2021-11-19 13:30:39,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11444 states, 11443 states have (on average 1.4907803897579306) internal successors, (17059), 11443 states have internal predecessors, (17059), 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) [2021-11-19 13:30:39,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11444 states to 11444 states and 17059 transitions. [2021-11-19 13:30:39,270 INFO L78 Accepts]: Start accepts. Automaton has 11444 states and 17059 transitions. Word has length 78 [2021-11-19 13:30:39,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:39,270 INFO L470 AbstractCegarLoop]: Abstraction has 11444 states and 17059 transitions. [2021-11-19 13:30:39,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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) [2021-11-19 13:30:39,271 INFO L276 IsEmpty]: Start isEmpty. Operand 11444 states and 17059 transitions. [2021-11-19 13:30:39,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-19 13:30:39,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:39,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:39,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 13:30:39,273 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:39,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:39,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1878446745, now seen corresponding path program 1 times [2021-11-19 13:30:39,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:30:39,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611248784] [2021-11-19 13:30:39,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:39,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:30:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 13:30:39,691 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:30:39,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611248784] [2021-11-19 13:30:39,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611248784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 13:30:39,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547129251] [2021-11-19 13:30:39,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:39,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:30:39,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:30:39,695 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:30:39,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 13:30:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:39,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 13:30:39,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:40,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 13:30:40,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:41,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 13:30:41,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547129251] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:30:41,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:30:41,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 6] total 16 [2021-11-19 13:30:41,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585281938] [2021-11-19 13:30:41,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:41,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:30:41,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:30:41,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:30:41,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:30:41,316 INFO L87 Difference]: Start difference. First operand 11444 states and 17059 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 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) [2021-11-19 13:30:43,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:43,774 INFO L93 Difference]: Finished difference Result 33419 states and 49757 transitions. [2021-11-19 13:30:43,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:30:43,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 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 78 [2021-11-19 13:30:43,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:43,827 INFO L225 Difference]: With dead ends: 33419 [2021-11-19 13:30:43,827 INFO L226 Difference]: Without dead ends: 22022 [2021-11-19 13:30:43,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:30:43,846 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 315 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:43,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 335 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:30:43,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22022 states. [2021-11-19 13:30:45,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22022 to 22020. [2021-11-19 13:30:45,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22020 states, 22019 states have (on average 1.4799491348380944) internal successors, (32587), 22019 states have internal predecessors, (32587), 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) [2021-11-19 13:30:45,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22020 states to 22020 states and 32587 transitions. [2021-11-19 13:30:45,815 INFO L78 Accepts]: Start accepts. Automaton has 22020 states and 32587 transitions. Word has length 78 [2021-11-19 13:30:45,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:45,815 INFO L470 AbstractCegarLoop]: Abstraction has 22020 states and 32587 transitions. [2021-11-19 13:30:45,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 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) [2021-11-19 13:30:45,815 INFO L276 IsEmpty]: Start isEmpty. Operand 22020 states and 32587 transitions. [2021-11-19 13:30:45,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-19 13:30:45,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:45,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:45,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:46,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-19 13:30:46,031 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:46,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:46,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1732924701, now seen corresponding path program 1 times [2021-11-19 13:30:46,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:30:46,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8905018] [2021-11-19 13:30:46,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:46,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:30:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 13:30:46,065 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:30:46,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8905018] [2021-11-19 13:30:46,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8905018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:46,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:46,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:30:46,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361654668] [2021-11-19 13:30:46,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:46,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:30:46,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:30:46,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:30:46,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:30:46,067 INFO L87 Difference]: Start difference. First operand 22020 states and 32587 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2021-11-19 13:30:48,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:48,849 INFO L93 Difference]: Finished difference Result 50328 states and 74421 transitions. [2021-11-19 13:30:48,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:30:48,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 79 [2021-11-19 13:30:48,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:48,913 INFO L225 Difference]: With dead ends: 50328 [2021-11-19 13:30:48,914 INFO L226 Difference]: Without dead ends: 28350 [2021-11-19 13:30:48,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:30:48,942 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 89 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:48,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 248 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:30:48,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28350 states. [2021-11-19 13:30:52,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28350 to 28348. [2021-11-19 13:30:52,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28348 states, 28347 states have (on average 1.460789501534554) internal successors, (41409), 28347 states have internal predecessors, (41409), 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) [2021-11-19 13:30:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28348 states to 28348 states and 41409 transitions. [2021-11-19 13:30:52,278 INFO L78 Accepts]: Start accepts. Automaton has 28348 states and 41409 transitions. Word has length 79 [2021-11-19 13:30:52,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:52,278 INFO L470 AbstractCegarLoop]: Abstraction has 28348 states and 41409 transitions. [2021-11-19 13:30:52,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2021-11-19 13:30:52,278 INFO L276 IsEmpty]: Start isEmpty. Operand 28348 states and 41409 transitions. [2021-11-19 13:30:52,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-19 13:30:52,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:52,280 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:52,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 13:30:52,281 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:52,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:52,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1736615356, now seen corresponding path program 1 times [2021-11-19 13:30:52,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:30:52,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003448077] [2021-11-19 13:30:52,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:52,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:30:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 13:30:52,604 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:30:52,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003448077] [2021-11-19 13:30:52,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003448077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 13:30:52,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989265033] [2021-11-19 13:30:52,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:52,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:30:52,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:30:52,607 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:30:52,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 13:30:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:52,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 13:30:52,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 13:30:53,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 13:30:54,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989265033] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:30:54,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:30:54,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 6] total 16 [2021-11-19 13:30:54,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252969591] [2021-11-19 13:30:54,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:54,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:30:54,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:30:54,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:30:54,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:30:54,513 INFO L87 Difference]: Start difference. First operand 28348 states and 41409 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2021-11-19 13:31:01,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:01,032 INFO L93 Difference]: Finished difference Result 82776 states and 120683 transitions. [2021-11-19 13:31:01,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:31:01,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 82 [2021-11-19 13:31:01,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:01,146 INFO L225 Difference]: With dead ends: 82776 [2021-11-19 13:31:01,147 INFO L226 Difference]: Without dead ends: 54522 [2021-11-19 13:31:01,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:31:01,177 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 300 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:01,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 328 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:31:01,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54522 states. [2021-11-19 13:31:08,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54522 to 54520. [2021-11-19 13:31:08,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54520 states, 54519 states have (on average 1.448394137823511) internal successors, (78965), 54519 states have internal predecessors, (78965), 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) [2021-11-19 13:31:08,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54520 states to 54520 states and 78965 transitions. [2021-11-19 13:31:08,429 INFO L78 Accepts]: Start accepts. Automaton has 54520 states and 78965 transitions. Word has length 82 [2021-11-19 13:31:08,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:08,430 INFO L470 AbstractCegarLoop]: Abstraction has 54520 states and 78965 transitions. [2021-11-19 13:31:08,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2021-11-19 13:31:08,430 INFO L276 IsEmpty]: Start isEmpty. Operand 54520 states and 78965 transitions. [2021-11-19 13:31:08,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 13:31:08,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:08,433 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:08,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:08,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ed15a23-06ac-4a76-87f8-f472addd1700/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:31:08,638 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:08,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:08,639 INFO L85 PathProgramCache]: Analyzing trace with hash 2086087252, now seen corresponding path program 1 times [2021-11-19 13:31:08,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:31:08,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7504302] [2021-11-19 13:31:08,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:08,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:31:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 13:31:08,686 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:31:08,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7504302] [2021-11-19 13:31:08,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7504302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:31:08,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:31:08,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:31:08,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748864704] [2021-11-19 13:31:08,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:08,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:31:08,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:31:08,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:31:08,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:31:08,688 INFO L87 Difference]: Start difference. First operand 54520 states and 78965 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2021-11-19 13:31:16,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:16,979 INFO L93 Difference]: Finished difference Result 127344 states and 185003 transitions. [2021-11-19 13:31:16,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:31:16,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 83 [2021-11-19 13:31:16,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:17,134 INFO L225 Difference]: With dead ends: 127344 [2021-11-19 13:31:17,135 INFO L226 Difference]: Without dead ends: 72918 [2021-11-19 13:31:17,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:31:17,198 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 75 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:17,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 258 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:31:17,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72918 states.