./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.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_0146d40c-a6a1-40c1-b286-05eb2254a82c/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0146d40c-a6a1-40c1-b286-05eb2254a82c/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_0146d40c-a6a1-40c1-b286-05eb2254a82c/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0146d40c-a6a1-40c1-b286-05eb2254a82c/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0146d40c-a6a1-40c1-b286-05eb2254a82c/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_0146d40c-a6a1-40c1-b286-05eb2254a82c/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 0ace7a09f7f3838d487cff246c419fb4727963d1c82067e9bae91cd3f078ad54 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:26:30,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:26:30,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:26:30,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:26:30,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:26:30,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:26:30,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:26:30,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:26:30,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:26:30,917 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:26:30,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:26:30,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:26:30,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:26:30,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:26:30,929 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:26:30,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:26:30,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:26:30,944 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:26:30,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:26:30,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:26:30,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:26:30,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:26:30,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:26:30,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:26:30,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:26:30,974 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:26:30,975 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:26:30,977 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:26:30,978 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:26:30,980 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:26:30,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:26:30,982 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:26:30,985 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:26:30,986 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:26:30,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:26:30,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:26:30,990 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:26:30,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:26:30,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:26:30,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:26:30,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:26:30,995 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0146d40c-a6a1-40c1-b286-05eb2254a82c/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:26:31,056 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:26:31,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:26:31,059 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:26:31,060 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:26:31,060 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:26:31,061 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:26:31,061 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:26:31,061 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:26:31,061 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:26:31,062 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:26:31,063 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:26:31,064 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:26:31,064 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:26:31,064 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:26:31,065 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:26:31,065 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:26:31,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:26:31,070 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:26:31,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:26:31,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:26:31,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:26:31,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:26:31,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:26:31,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:26:31,073 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:26:31,073 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:26:31,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:26:31,074 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:26:31,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:26:31,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:26:31,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:26:31,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:26:31,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:26:31,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:26:31,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:26:31,076 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:26:31,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:26:31,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:26:31,077 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:26:31,078 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:26:31,078 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_0146d40c-a6a1-40c1-b286-05eb2254a82c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0146d40c-a6a1-40c1-b286-05eb2254a82c/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ace7a09f7f3838d487cff246c419fb4727963d1c82067e9bae91cd3f078ad54 [2021-11-19 13:26:31,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:26:31,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:26:31,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:26:31,519 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:26:31,520 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:26:31,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0146d40c-a6a1-40c1-b286-05eb2254a82c/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c [2021-11-19 13:26:31,631 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0146d40c-a6a1-40c1-b286-05eb2254a82c/bin/utaipan-UbGMyvGFUs/data/e67b97831/d5208fd9c51e4c7f898de34c2e69612f/FLAGdbf86b2e0 [2021-11-19 13:26:32,341 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:26:32,341 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0146d40c-a6a1-40c1-b286-05eb2254a82c/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c [2021-11-19 13:26:32,357 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0146d40c-a6a1-40c1-b286-05eb2254a82c/bin/utaipan-UbGMyvGFUs/data/e67b97831/d5208fd9c51e4c7f898de34c2e69612f/FLAGdbf86b2e0 [2021-11-19 13:26:32,590 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0146d40c-a6a1-40c1-b286-05eb2254a82c/bin/utaipan-UbGMyvGFUs/data/e67b97831/d5208fd9c51e4c7f898de34c2e69612f [2021-11-19 13:26:32,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:26:32,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:26:32,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:26:32,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:26:32,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:26:32,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:26:32" (1/1) ... [2021-11-19 13:26:32,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60081b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:32, skipping insertion in model container [2021-11-19 13:26:32,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:26:32" (1/1) ... [2021-11-19 13:26:32,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:26:32,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:26:33,080 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_0146d40c-a6a1-40c1-b286-05eb2254a82c/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c[31172,31185] [2021-11-19 13:26:33,084 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:26:33,097 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:26:33,251 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_0146d40c-a6a1-40c1-b286-05eb2254a82c/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c[31172,31185] [2021-11-19 13:26:33,252 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:26:33,294 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:26:33,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:33 WrapperNode [2021-11-19 13:26:33,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:26:33,296 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:26:33,296 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:26:33,296 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:26:33,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:33" (1/1) ... [2021-11-19 13:26:33,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:33" (1/1) ... [2021-11-19 13:26:33,450 INFO L137 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 1008 [2021-11-19 13:26:33,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:26:33,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:26:33,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:26:33,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:26:33,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:33" (1/1) ... [2021-11-19 13:26:33,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:33" (1/1) ... [2021-11-19 13:26:33,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:33" (1/1) ... [2021-11-19 13:26:33,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:33" (1/1) ... [2021-11-19 13:26:33,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:33" (1/1) ... [2021-11-19 13:26:33,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:33" (1/1) ... [2021-11-19 13:26:33,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:33" (1/1) ... [2021-11-19 13:26:33,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:26:33,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:26:33,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:26:33,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:26:33,555 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:33" (1/1) ... [2021-11-19 13:26:33,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:26:33,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0146d40c-a6a1-40c1-b286-05eb2254a82c/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:26:33,592 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0146d40c-a6a1-40c1-b286-05eb2254a82c/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:26:33,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0146d40c-a6a1-40c1-b286-05eb2254a82c/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:26:33,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:26:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 13:26:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:26:33,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:26:33,874 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:26:33,876 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:26:35,240 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:26:36,706 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:26:36,707 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:26:36,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:26:36 BoogieIcfgContainer [2021-11-19 13:26:36,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:26:36,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:26:36,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:26:36,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:26:36,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:26:32" (1/3) ... [2021-11-19 13:26:36,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce950e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:26:36, skipping insertion in model container [2021-11-19 13:26:36,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:33" (2/3) ... [2021-11-19 13:26:36,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce950e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:26:36, skipping insertion in model container [2021-11-19 13:26:36,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:26:36" (3/3) ... [2021-11-19 13:26:36,724 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c [2021-11-19 13:26:36,731 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:26:36,731 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:26:36,801 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:26:36,808 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 13:26:36,809 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:26:36,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:36,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 13:26:36,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:36,846 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] [2021-11-19 13:26:36,847 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:36,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:36,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1408077654, now seen corresponding path program 1 times [2021-11-19 13:26:36,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:26:36,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606613975] [2021-11-19 13:26:36,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:36,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:26:37,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:37,971 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 13:26:37,972 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:26:37,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606613975] [2021-11-19 13:26:37,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606613975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:37,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:37,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:26:37,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837111531] [2021-11-19 13:26:37,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:37,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:26:37,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:26:38,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:26:38,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:38,042 INFO L87 Difference]: Start difference. First operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 13:26:38,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:38,433 INFO L93 Difference]: Finished difference Result 177 states and 288 transitions. [2021-11-19 13:26:38,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:26:38,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2021-11-19 13:26:38,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:38,460 INFO L225 Difference]: With dead ends: 177 [2021-11-19 13:26:38,460 INFO L226 Difference]: Without dead ends: 158 [2021-11-19 13:26:38,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:38,472 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 26 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:38,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 372 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:26:38,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-19 13:26:38,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2021-11-19 13:26:38,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6122448979591837) internal successors, (237), 147 states have internal predecessors, (237), 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 13:26:38,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 237 transitions. [2021-11-19 13:26:38,535 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 237 transitions. Word has length 54 [2021-11-19 13:26:38,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:38,536 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 237 transitions. [2021-11-19 13:26:38,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 13:26:38,537 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 237 transitions. [2021-11-19 13:26:38,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-19 13:26:38,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:38,541 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 13:26:38,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 13:26:38,542 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:38,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:38,543 INFO L85 PathProgramCache]: Analyzing trace with hash 632588477, now seen corresponding path program 1 times [2021-11-19 13:26:38,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:26:38,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780171577] [2021-11-19 13:26:38,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:38,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:26:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:38,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:26:38,894 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:26:38,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780171577] [2021-11-19 13:26:38,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780171577] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:38,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:38,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:26:38,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351304580] [2021-11-19 13:26:38,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:38,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:26:38,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:26:38,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:26:38,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:38,901 INFO L87 Difference]: Start difference. First operand 148 states and 237 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 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 13:26:39,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:39,221 INFO L93 Difference]: Finished difference Result 180 states and 285 transitions. [2021-11-19 13:26:39,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:26:39,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 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 13:26:39,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:39,225 INFO L225 Difference]: With dead ends: 180 [2021-11-19 13:26:39,225 INFO L226 Difference]: Without dead ends: 160 [2021-11-19 13:26:39,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:39,228 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 24 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:39,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 552 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:26:39,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-19 13:26:39,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-11-19 13:26:39,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6054421768707483) internal successors, (236), 147 states have internal predecessors, (236), 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 13:26:39,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 236 transitions. [2021-11-19 13:26:39,248 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 236 transitions. Word has length 55 [2021-11-19 13:26:39,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:39,249 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 236 transitions. [2021-11-19 13:26:39,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 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 13:26:39,250 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 236 transitions. [2021-11-19 13:26:39,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 13:26:39,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:39,254 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 13:26:39,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 13:26:39,254 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:39,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:39,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1927287777, now seen corresponding path program 1 times [2021-11-19 13:26:39,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:26:39,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313122176] [2021-11-19 13:26:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:39,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:26:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:39,517 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 13:26:39,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:26:39,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313122176] [2021-11-19 13:26:39,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313122176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:39,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:39,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:26:39,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916657386] [2021-11-19 13:26:39,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:39,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:26:39,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:26:39,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:26:39,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:39,522 INFO L87 Difference]: Start difference. First operand 148 states and 236 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 13:26:39,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:39,769 INFO L93 Difference]: Finished difference Result 180 states and 284 transitions. [2021-11-19 13:26:39,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:26:39,770 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 13:26:39,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:39,772 INFO L225 Difference]: With dead ends: 180 [2021-11-19 13:26:39,772 INFO L226 Difference]: Without dead ends: 160 [2021-11-19 13:26:39,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:39,778 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 22 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:39,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 552 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:26:39,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-19 13:26:39,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-11-19 13:26:39,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.598639455782313) internal successors, (235), 147 states have internal predecessors, (235), 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 13:26:39,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 235 transitions. [2021-11-19 13:26:39,815 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 235 transitions. Word has length 56 [2021-11-19 13:26:39,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:39,816 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 235 transitions. [2021-11-19 13:26:39,817 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 13:26:39,817 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 235 transitions. [2021-11-19 13:26:39,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 13:26:39,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:39,830 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 13:26:39,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 13:26:39,831 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:39,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:39,832 INFO L85 PathProgramCache]: Analyzing trace with hash 326378726, now seen corresponding path program 1 times [2021-11-19 13:26:39,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:26:39,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260232306] [2021-11-19 13:26:39,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:39,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:26:39,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:40,214 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 13:26:40,214 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:26:40,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260232306] [2021-11-19 13:26:40,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260232306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:40,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:40,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:26:40,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494140814] [2021-11-19 13:26:40,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:40,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:26:40,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:26:40,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:26:40,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:40,220 INFO L87 Difference]: Start difference. First operand 148 states and 235 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 13:26:40,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:40,456 INFO L93 Difference]: Finished difference Result 180 states and 283 transitions. [2021-11-19 13:26:40,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:26:40,459 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 13:26:40,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:40,460 INFO L225 Difference]: With dead ends: 180 [2021-11-19 13:26:40,461 INFO L226 Difference]: Without dead ends: 160 [2021-11-19 13:26:40,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:40,463 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 20 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:40,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 383 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:26:40,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-19 13:26:40,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-11-19 13:26:40,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5918367346938775) internal successors, (234), 147 states have internal predecessors, (234), 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 13:26:40,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 234 transitions. [2021-11-19 13:26:40,486 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 234 transitions. Word has length 57 [2021-11-19 13:26:40,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:40,490 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 234 transitions. [2021-11-19 13:26:40,490 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 13:26:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 234 transitions. [2021-11-19 13:26:40,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 13:26:40,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:40,493 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 13:26:40,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 13:26:40,494 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:40,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:40,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1476015336, now seen corresponding path program 1 times [2021-11-19 13:26:40,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:26:40,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510360614] [2021-11-19 13:26:40,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:40,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:26:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:40,753 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 13:26:40,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:26:40,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510360614] [2021-11-19 13:26:40,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510360614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:40,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:40,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:26:40,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707148673] [2021-11-19 13:26:40,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:40,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:26:40,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:26:40,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:26:40,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:40,760 INFO L87 Difference]: Start difference. First operand 148 states and 234 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 13:26:40,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:40,958 INFO L93 Difference]: Finished difference Result 180 states and 282 transitions. [2021-11-19 13:26:40,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:26:40,959 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 13:26:40,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:40,960 INFO L225 Difference]: With dead ends: 180 [2021-11-19 13:26:40,961 INFO L226 Difference]: Without dead ends: 160 [2021-11-19 13:26:40,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:40,963 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 18 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:40,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 382 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:26:40,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-19 13:26:40,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-11-19 13:26:40,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5850340136054422) internal successors, (233), 147 states have internal predecessors, (233), 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 13:26:40,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 233 transitions. [2021-11-19 13:26:40,987 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 233 transitions. Word has length 58 [2021-11-19 13:26:40,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:40,989 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 233 transitions. [2021-11-19 13:26:40,990 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 13:26:40,991 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 233 transitions. [2021-11-19 13:26:40,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 13:26:40,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:40,997 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 13:26:40,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 13:26:40,998 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:40,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:40,998 INFO L85 PathProgramCache]: Analyzing trace with hash -363924016, now seen corresponding path program 1 times [2021-11-19 13:26:40,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:26:40,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232814494] [2021-11-19 13:26:40,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:40,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:26:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:41,473 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 13:26:41,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:26:41,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232814494] [2021-11-19 13:26:41,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232814494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:41,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:41,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:26:41,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898589538] [2021-11-19 13:26:41,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:41,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:26:41,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:26:41,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:26:41,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:41,476 INFO L87 Difference]: Start difference. First operand 148 states and 233 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 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 13:26:41,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:41,663 INFO L93 Difference]: Finished difference Result 178 states and 278 transitions. [2021-11-19 13:26:41,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:26:41,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 13:26:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:41,665 INFO L225 Difference]: With dead ends: 178 [2021-11-19 13:26:41,666 INFO L226 Difference]: Without dead ends: 158 [2021-11-19 13:26:41,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:41,667 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 15 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:41,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 377 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:26:41,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-19 13:26:41,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2021-11-19 13:26:41,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5810810810810811) internal successors, (234), 148 states have internal predecessors, (234), 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 13:26:41,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 234 transitions. [2021-11-19 13:26:41,675 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 234 transitions. Word has length 60 [2021-11-19 13:26:41,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:41,676 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 234 transitions. [2021-11-19 13:26:41,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 13:26:41,676 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 234 transitions. [2021-11-19 13:26:41,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 13:26:41,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:41,677 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] [2021-11-19 13:26:41,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 13:26:41,678 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:41,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:41,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1515270749, now seen corresponding path program 1 times [2021-11-19 13:26:41,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:26:41,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589484325] [2021-11-19 13:26:41,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:41,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:26:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:42,203 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 13:26:42,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:26:42,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589484325] [2021-11-19 13:26:42,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589484325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:42,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:42,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:26:42,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752740126] [2021-11-19 13:26:42,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:42,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:26:42,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:26:42,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:26:42,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:42,206 INFO L87 Difference]: Start difference. First operand 149 states and 234 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 13:26:42,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:42,427 INFO L93 Difference]: Finished difference Result 179 states and 279 transitions. [2021-11-19 13:26:42,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:26:42,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 61 [2021-11-19 13:26:42,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:42,430 INFO L225 Difference]: With dead ends: 179 [2021-11-19 13:26:42,430 INFO L226 Difference]: Without dead ends: 159 [2021-11-19 13:26:42,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:42,432 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 12 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:42,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 564 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:26:42,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-19 13:26:42,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2021-11-19 13:26:42,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5666666666666667) internal successors, (235), 150 states have internal predecessors, (235), 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 13:26:42,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 235 transitions. [2021-11-19 13:26:42,440 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 235 transitions. Word has length 61 [2021-11-19 13:26:42,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:42,441 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 235 transitions. [2021-11-19 13:26:42,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 13:26:42,441 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 235 transitions. [2021-11-19 13:26:42,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 13:26:42,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:42,442 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 13:26:42,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 13:26:42,443 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:42,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:42,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1693157443, now seen corresponding path program 1 times [2021-11-19 13:26:42,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:26:42,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603467491] [2021-11-19 13:26:42,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:42,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:26:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:42,769 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 13:26:42,769 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:26:42,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603467491] [2021-11-19 13:26:42,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603467491] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:42,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:42,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:26:42,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246034871] [2021-11-19 13:26:42,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:42,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:26:42,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:26:42,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:26:42,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:42,772 INFO L87 Difference]: Start difference. First operand 151 states and 235 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 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 13:26:42,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:42,947 INFO L93 Difference]: Finished difference Result 179 states and 276 transitions. [2021-11-19 13:26:42,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:26:42,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 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 13:26:42,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:42,949 INFO L225 Difference]: With dead ends: 179 [2021-11-19 13:26:42,949 INFO L226 Difference]: Without dead ends: 159 [2021-11-19 13:26:42,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:26:42,951 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 7 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:42,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 380 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:26:42,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-19 13:26:42,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2021-11-19 13:26:42,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.5629139072847682) internal successors, (236), 151 states have internal predecessors, (236), 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 13:26:42,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 236 transitions. [2021-11-19 13:26:42,959 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 236 transitions. Word has length 63 [2021-11-19 13:26:42,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:42,960 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 236 transitions. [2021-11-19 13:26:42,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 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 13:26:42,960 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 236 transitions. [2021-11-19 13:26:42,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-19 13:26:42,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:42,961 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 13:26:42,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 13:26:42,961 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:42,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:42,962 INFO L85 PathProgramCache]: Analyzing trace with hash 937534601, now seen corresponding path program 1 times [2021-11-19 13:26:42,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:26:42,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763983757] [2021-11-19 13:26:42,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:42,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:26:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:43,185 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 13:26:43,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:26:43,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763983757] [2021-11-19 13:26:43,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763983757] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:43,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:43,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 13:26:43,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401263051] [2021-11-19 13:26:43,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:43,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:26:43,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:26:43,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:26:43,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:26:43,188 INFO L87 Difference]: Start difference. First operand 152 states and 236 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 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 13:26:43,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:43,544 INFO L93 Difference]: Finished difference Result 201 states and 312 transitions. [2021-11-19 13:26:43,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:26:43,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 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 13:26:43,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:43,547 INFO L225 Difference]: With dead ends: 201 [2021-11-19 13:26:43,547 INFO L226 Difference]: Without dead ends: 181 [2021-11-19 13:26:43,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 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 13:26:43,548 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 44 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:43,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 776 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:26:43,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-19 13:26:43,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 155. [2021-11-19 13:26:43,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.5454545454545454) internal successors, (238), 154 states have internal predecessors, (238), 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 13:26:43,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 238 transitions. [2021-11-19 13:26:43,559 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 238 transitions. Word has length 64 [2021-11-19 13:26:43,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:43,559 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 238 transitions. [2021-11-19 13:26:43,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 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 13:26:43,560 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 238 transitions. [2021-11-19 13:26:43,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 13:26:43,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:43,561 INFO L514 BasicCegarLoop]: trace histogram [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 13:26:43,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 13:26:43,562 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:43,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:43,563 INFO L85 PathProgramCache]: Analyzing trace with hash -753306502, now seen corresponding path program 1 times [2021-11-19 13:26:43,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:26:43,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532918966] [2021-11-19 13:26:43,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:43,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:26:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:26:46,117 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:26:46,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532918966] [2021-11-19 13:26:46,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532918966] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 13:26:46,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879864900] [2021-11-19 13:26:46,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:46,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:26:46,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0146d40c-a6a1-40c1-b286-05eb2254a82c/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:26:46,123 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0146d40c-a6a1-40c1-b286-05eb2254a82c/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:26:46,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0146d40c-a6a1-40c1-b286-05eb2254a82c/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 13:26:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:46,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 13:26:46,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:28:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:28:27,804 INFO L328 TraceCheckSpWp]: Computing backward predicates...